Mandeville, Louisiana Weather Conditions

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Current Conditions

  • 74°
  • Mostly Cloudy
  • Wind: SSE 10 mph
  • Humidity: 85%
  • Visibility: 10.0 miles
  • Dew Point: 69°
  • Pressure: 30.13 in. 0

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Next 12 Hours

11  am
2  pm
5  pm
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11  pm
Mostly Cloudy
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Chance of Rain
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Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Tuesday
  • Chance of Rain
  • High: 75 °
  • Low: 62 °
  • Chance of Rain
  • Wednesday
  • Chance of Rain
  • High: 78 °
  • Low: 43 °
  • Chance of Rain
  • Thursday
  • Chance of Rain
  • High: 46 °
  • Low: 29 °
  • Chance of Rain
  • Friday
  • Partly Cloudy
  • High: 55 °
  • Low: 35 °
  • Partly Cloudy
  • Saturday
  • Partly Cloudy
  • High: 60 °
  • Low: 40 °
  • Partly Cloudy

Forecast for Mandeville, Louisiana

Updated: 7:16 AM CST on January 03, 2015

  • Today

    Considerable cloudiness. Occasional rain showers this afternoon. Thunder possible. High 24C. Winds SSE at 15 to 25 km/h. Chance of rain 40%.

  • Today

    Mostly cloudy this evening, then becoming foggy and damp after midnight. A stray shower or thunderstorm is possible. Low 17C. Winds SSE at 10 to 15 km/h.

  • Tomorrow

    Cloudy with occasional showers. Thunder possible. High 26C. Winds S at 15 to 25 km/h. Chance of rain 40%.

  • Tomorrow

    Partly cloudy skies early followed by some light rain later at night. Thunder possible. Low 6C. SW winds at 10 to 15 km/h, increasing to 25 to 40 km/h. Chance of rain 80%.

  • Thursday

    Showers in the morning, then cloudy in the afternoon. High 8C. Winds N at 25 to 40 km/h. Chance of rain 50%.

  • Thursday

    Mostly cloudy skies with a few showers late. Low -1C. Winds N at 15 to 25 km/h. Chance of rain 30%.

  • Friday

    Partly cloudy. High 13C. Winds NNE at 15 to 25 km/h.

  • Friday

    Partly cloudy. Low 2C. Winds light and variable.

  • Saturday

    Partly cloudy skies. High 16C. Winds light and variable.

  • Saturday

    Showers in the evening, then partly cloudy overnight. Low around 5C. Winds light and variable. Chance of rain 40%.

  • Sunday

    Mostly sunny skies during the morning hours will give way to occasional showers in the afternoon. High 18C. Winds NE at 10 to 15 km/h. Chance of rain 50%.

  • Sunday

    Rain showers early with mostly cloudy conditions late. Low 6C. Winds light and variable. Chance of rain 50%.

  • Monday

    Rain likely. High 19C. Winds NE at 10 to 15 km/h. Chance of rain 70%. Rainfall around 12mm.

  • Monday

    Steady light rain in the evening. Showers continuing late. Low 8C. Winds light and variable. Chance of rain 60%.

  • Tuesday

    Rain showers early with some sunshine later in the day. High around 20C. Winds NE at 10 to 15 km/h. Chance of rain 50%.

  • Tuesday

    Cloudy skies early with showers later at night. Low 11C. Winds light and variable. Chance of rain 40%.

  • Wednesday

    Showers in the morning, then partly cloudy in the afternoon. High 21C. Winds ENE at 10 to 15 km/h. Chance of rain 40%.

  • Wednesday

    Partly cloudy during the evening. A few showers developing later during the night. Low 11C. Winds NE at 10 to 15 km/h. Chance of rain 30%.

  • Thursday

    Cloudy skies early will become partly cloudy later in the day. High near 20C. Winds ENE at 10 to 15 km/h.

  • Thursday

    Rain showers in the evening becoming more intermittent overnight. Low near 10C. Winds ENE at 10 to 15 km/h. Chance of rain 40%.

  • Friday

    Partly cloudy early followed by mostly cloudy skies and a few showers later in the day. High 21C. Winds E at 15 to 25 km/h. Chance of rain 30%.

  • Friday

    Cloudy with occasional showers. Low 11C. Winds E at 10 to 15 km/h. Chance of rain 40%.

Severe Weather Alert Descriptions

 Flood Warning  Statement as of 7:53 PM CST on March 2, 2015


The Flood Warning continues for
the Pearl River near Pearl River.
* From Tuesday evening until further notice.
* At 7:00 PM Monday the stage was 13.6 feet.
* Minor flooding is forecast.
* Flood stage is 14.0 feet.
* Forecast... the river is expected to rise above flood stage by
tomorrow evening. The river is expected to continue rising until
cresting at around 16.0 feet by Saturday afternoon.
* Impact... at 16.0 feet... lower portions of streets in River Gardens
subdivision will begin to flood. Secondary roads to the river and
throughout Honey Island Swamp will remain inundated. Property in
the vicinity of the gage is flooded threatening about 20 homes
along the left bank. The Bogue Chitto National Wildlife Refuge will
be closed to hunting at the 15.5 foot stage
* impact... at 15.5 feet... secondary roads to the river and throughout
Honey Island Swamp are inundated. Property in the vicinity of the
gage is flooded threatening about 20 homes along the left bank. The
Bogue Chitto National Wildlife Refuge will be closed to hunting at
the 15.5 foot stage
* impact... at 14.0 feet... secondary roads to the river and throughout
Honey Island Swamp are inundated. Property in the vicinity of the
gage is flooded threatening about 20 homes along the left bank
* impact... at 13.0 feet... the east and west channels of the river will
begin to merge. Honey Island Swamp trails will be under water as
inundation of the swamp begins


Lat... Lon 3067 8976 3067 8990 3018 8964 3020 8955







753 PM CST Mon Mar 2 2015

The Flood Warning continues for
the Pearl River near Bogalusa.
* Until further notice.
* At 7:00 PM Monday the stage was 19.6 feet.
* Minor flooding is occurring and minor flooding is forecast.
* Flood stage is 18.0 feet.
* Forecast... the river is expected to continue rising until cresting
at around 20.5 feet by late Thursday night. The river is expected
to begin slowly falling thereafter.
* Impact... at 20.0 feet... Woodlands and crop acreage along the river
will be flooded. The Bogue Chitto wildlife management area will be
inundated with water in recreational camps and over access roads.
* Impact... at 18.5 feet... Woodlands and crop acreage along the river
will be flooded. The Bogue Chitto wildlife management area will be
inundated with water in recreational camps and over access roads.



Lat... Lon 3100 8969 3100 8979 3067 8990 3067 8976








 Public Information Statement  Statement as of 5:59 am CST on March 3, 2015


     ... severe weather awareness week in Louisiana...
          ... March 1 through March 7 2015

The week of March 1 through March 7 has been designated as severe
weather awareness week in Louisiana. Late winter and Spring months
typically bring the highest frequency of severe weather to Gulf
Coast region. Severe weather awareness week is good time to review
severe weather safety plans and ensure you have a means to receive
timely warnings.

In addition to tornadoes... lightning... large hail... and damaging
winds... thunderstorms also can produce flash flooding. A flash flood
is a flood that develops quickly along a stream... creek or bayou due
to heavy rain or water releases from dams upstream.

Flash floods can occur any time of the day... but are most
dangerous at night. Flooding causes more deaths each year than
any other weather event... accounting for about 140 deaths each
year nationwide.

Flash floods are very deceptive. Often flash flooding can occur at
night when warnings may go unnoticed and when darkness makes it hard
to find an escape Route. Even worse... the water is almost always
deeper and moves more swiftly than it appears. It can hide damage
to the Road beneath as well as debris on the Road.

The safety rule is simple... stay out of and away from deep water.
Motorists must not try to cross flooded low areas. Even if a
previous vehicle made it through the flooding... the water can rise
so rapidly that you may not make it. Using alternate routes to
avoid flooding is the only way to be safe.

If your vehicle stalls in flood waters... leave it immediately and
move to higher ground. Most cars and light trucks will begin to
float in as little as two feet of water. If the water reaches the
doors... electric windows and door systems may be shorted out. Even
if the are not... occupants must push against the current to open
doors. This is extremely difficult if not impossible.

Everyone... especially children... should stay away from flooded
creeks ... streams... or drainage ditches. The Swift Current can
quickly swept away even if they are strong swimmers. Soggy banks
along these swiftly moving waters become unstable after heavy

Rain and can easily give away... dumping the victim into the flood
waters.

On Wednesday morning around 915am ... the National Weather Service
will issue a test Tornado Warning message on the NOAA Weather Radio
system to allow organizations to test and review their severe
weather plans and ensure their NOAA weather radios are working
properly. The test message will be clearly worded as a test. Many
NOAA Weather Radio may not sound an audio alarm... however they will
display test on their screen signifying they successfully received
the test. If severe weather or hazardous weather is expected on
Wednesday the test message will be rescheduled to a later date.

For further information contact the New Orleans / Baton Rouge area
National Weather Service forecast office... 985-649-0357 extension 4.



Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: Soult Street/Molitor Street, Mandeville, LA

Updated: 10:28 AM CST

Temperature: 75.0 °F Dew Point: 74 °F Humidity: 95% Wind: Calm Pressure: 30.15 in Hourly Precipitation: 0.00 in Heat Index: 73 °F Graphs

Location: The Timbers, Mandeville, LA

Updated: 10:25 AM CST

Temperature: 72.1 °F Dew Point: 71 °F Humidity: 96% Wind: South at 2.2 mph Pressure: 30.11 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Tanager Drive, Mandeville, LA

Updated: 10:25 AM CST

Temperature: 71.1 °F Dew Point: 71 °F Humidity: 99% Wind: North at - Pressure: 30.07 in Hourly Precipitation: - Heat Index: - Graphs

Location: Woodlands, Mandeville, LA

Updated: 10:28 AM CST

Temperature: 74.5 °F Dew Point: 68 °F Humidity: 79% Wind: SW at 4.3 mph Pressure: 30.16 in Hourly Precipitation: 0.00 in Heat Index: 75 °F Graphs

Location: Bayou Acres, Mandeville, LA

Updated: 10:26 AM CST

Temperature: 76.8 °F Dew Point: 72 °F Humidity: 84% Wind: SSE at 1.7 mph Pressure: 30.09 in Hourly Precipitation: - Heat Index: 78 °F Graphs

Location: Mandeville, Mandeville, LA

Updated: 10:14 AM CST

Temperature: 68.6 °F Dew Point: 68 °F Humidity: 97% Wind: SE at 8.0 mph Pressure: 30.14 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Old Mandeville, Mandeville, LA

Updated: 10:22 AM CST

Temperature: 73.6 °F Dew Point: 70 °F Humidity: 89% Wind: West at 1.7 mph Pressure: 29.99 in Hourly Precipitation: - Heat Index: 72 °F Graphs

Location: Deval Estates, Mandeville, LA

Updated: 10:27 AM CST

Temperature: 73.8 °F Dew Point: 71 °F Humidity: 91% Wind: WSW at 1.1 mph Pressure: 29.97 in Hourly Precipitation: 0.00 in Heat Index: 72 °F Graphs

Location: SHARP ROAD, Mandeville, LA

Updated: 10:27 AM CST

Temperature: 72.1 °F Dew Point: 71 °F Humidity: 96% Wind: Calm Pressure: 30.12 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Magnolia Ridge Drive, Mandeville, LA

Updated: 10:25 AM CST

Temperature: 72.3 °F Dew Point: 70 °F Humidity: 93% Wind: North at - Pressure: 30.18 in Hourly Precipitation: - Heat Index: - Graphs

Location: Mandeville, Mandeville, LA

Updated: 10:20 AM CST

Temperature: 63.4 °F Dew Point: - Humidity: - Wind: North at - Pressure: 30.09 in Hourly Precipitation: - Heat Index: - Graphs

Location: Mandeville, Mandeville, LA

Updated: 10:27 AM CST

Temperature: 72.8 °F Dew Point: 70 °F Humidity: 92% Wind: SE at 5.0 mph Pressure: 30.10 in Hourly Precipitation: - Heat Index: - Graphs

Location: Cherry Laurel Drive, Covington, LA

Updated: 10:26 AM CST

Temperature: 70.0 °F Dew Point: 70 °F Humidity: 100% Wind: North at - Pressure: 30.20 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Chateau Village Subdivision, Mandeville, LA

Updated: 10:27 AM CST

Temperature: 70.5 °F Dew Point: 67 °F Humidity: 88% Wind: Calm Pressure: 30.00 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: RAWS BIG BRANCH NWR LA US, Lacombe, LA

Updated: 9:47 AM CST

Temperature: 70 °F Dew Point: 67 °F Humidity: 91% Wind: SE at 4 mph Pressure: - Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Covington / Abita Springs, Covington, LA

Updated: 10:28 AM CST

Temperature: 72.5 °F Dew Point: 69 °F Humidity: 90% Wind: South at 6.3 mph Pressure: 30.18 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Covington, Covington, LA

Updated: 10:18 AM CST

Temperature: 72.5 °F Dew Point: 70 °F Humidity: 93% Wind: Calm Pressure: 29.91 in Hourly Precipitation: - Heat Index: - Graphs

Location: Oak Mill, Lacombe, LA

Updated: 10:28 AM CST

Temperature: 70.2 °F Dew Point: 70 °F Humidity: 99% Wind: Calm Pressure: 30.12 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Covington near Terra Bella Village, Covington, LA

Updated: 10:28 AM CST

Temperature: 71.3 °F Dew Point: 71 °F Humidity: 99% Wind: Calm Pressure: 30.12 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: River Forest, Covington, LA

Updated: 11:17 AM EST

Temperature: 72.3 °F Dew Point: 72 °F Humidity: 99% Wind: ESE at 2.7 mph Pressure: 30.02 in Hourly Precipitation: - Heat Index: - Graphs

Location: Port Louis, Madisonville, LA

Updated: 10:28 AM CST

Temperature: 63.8 °F Dew Point: 14 °F Humidity: 14% Wind: NNE at 4.0 mph Pressure: 30.13 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: River Forest, Covington, LA

Updated: 10:28 AM CST

Temperature: 70.9 °F Dew Point: 70 °F Humidity: 98% Wind: Calm Pressure: 30.09 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Autumn Creek, Madisonville, LA

Updated: 10:28 AM CST

Temperature: 70.3 °F Dew Point: 68 °F Humidity: 93% Wind: ESE at 6.0 mph Pressure: 29.82 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: RAWS SELA PORTABLE LA US, Lacombe, LA

Updated: 9:34 AM CST

Temperature: 65 °F Dew Point: 65 °F Humidity: 100% Wind: SSE at 4 mph Pressure: - Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Near Tchefuncte River Flood Gauge, Covington, LA

Updated: 10:16 AM CST

Temperature: 72.5 °F Dew Point: 72 °F Humidity: 97% Wind: West at 2.2 mph Pressure: 29.80 in Hourly Precipitation: - Heat Index: - Graphs

Location: NorthPointe Business Park, Covington, LA

Updated: 10:19 AM CST

Temperature: 71.7 °F Dew Point: 69 °F Humidity: 92% Wind: South at 2.0 mph Pressure: 30.11 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Willow Bend, Madisonville, LA

Updated: 10:27 AM CST

Temperature: 70.3 °F Dew Point: 68 °F Humidity: 92% Wind: SSE at 9.8 mph Pressure: 29.79 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Windermere Subdivision, Madisonville, LA

Updated: 10:28 AM CST

Temperature: 69.6 °F Dew Point: 68 °F Humidity: 94% Wind: Calm Pressure: 30.11 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Circle O Acres, Slidell, LA

Updated: 10:27 AM CST

Temperature: 73.0 °F Dew Point: 70 °F Humidity: 91% Wind: NW at 1.0 mph Pressure: 30.11 in Hourly Precipitation: 0.00 in Heat Index: 70 °F Graphs

Location: Bayou Liberty, Slidell, LA

Updated: 10:23 AM CST

Temperature: 73.6 °F Dew Point: 70 °F Humidity: 89% Wind: Calm Pressure: 30.14 in Hourly Precipitation: - Heat Index: 72 °F Graphs

Location: Timber Ridge, Slidell, LA

Updated: 10:28 AM CST

Temperature: 71.6 °F Dew Point: 68 °F Humidity: 89% Wind: SSE at 5.0 mph Pressure: 30.13 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Hickory, Pearl River, LA

Updated: 10:26 AM CST

Temperature: 73.8 °F Dew Point: 70 °F Humidity: 87% Wind: East at 3.4 mph Pressure: 29.97 in Hourly Precipitation: 0.00 in Heat Index: 73 °F Graphs

Location: Slidell, LA

Updated: 10:28 AM CST

Temperature: 72.1 °F Dew Point: 71 °F Humidity: 95% Wind: South at 5.0 mph Pressure: 30.12 in Hourly Precipitation: 0.01 in Heat Index: - Graphs

Location: LAKEVIEW DR., Slidell, LA

Updated: 10:16 AM CST

Temperature: 63.4 °F Dew Point: 63 °F Humidity: 100% Wind: ESE at 5.0 mph Pressure: 30.13 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Pearl Hickory, Pearl River, LA

Updated: 10:15 AM CST

Temperature: 73.0 °F Dew Point: 70 °F Humidity: 89% Wind: SW at 2.2 mph Pressure: 29.89 in Hourly Precipitation: - Heat Index: 71 °F Graphs

Location: Brookwood Estate, Slidell, LA

Updated: 10:27 AM CST

Temperature: 75.9 °F Dew Point: 70 °F Humidity: 82% Wind: SSE at 4.7 mph Pressure: 29.89 in Hourly Precipitation: - Heat Index: 77 °F Graphs

Location: Pearl River Town, Pearl River, LA

Updated: 10:27 AM CST

Temperature: 73.6 °F Dew Point: 71 °F Humidity: 92% Wind: SW at 4.2 mph Pressure: 29.95 in Hourly Precipitation: - Heat Index: 71 °F Graphs

Location: Michigan Ave. The Roy's, Slidell, LA

Updated: 10:27 AM CST

Temperature: 72.9 °F Dew Point: 70 °F Humidity: 90% Wind: Calm Pressure: 30.10 in Hourly Precipitation: 0.00 in Heat Index: 71 °F Graphs

Location: Bush, Bush, LA

Updated: 10:28 AM CST

Temperature: 68.9 °F Dew Point: 69 °F Humidity: 99% Wind: East at 3.6 mph Pressure: 30.04 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Dragonfly, Bush, LA

Updated: 10:28 AM CST

Temperature: 68.9 °F Dew Point: 68 °F Humidity: 97% Wind: SE at 4.0 mph Pressure: 30.01 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion




Area forecast discussion 
National Weather Service New Orleans la 
742 am CST Tuesday Mar 3 2015 


..sounding discussion... 


The sounding this morning is saturated to 010 feet... which is 
representative of the fog layer in place region wide. Much drier 
air is present aloft above the maritime layer. Winds are southerly 
from the surface to 800 mb then become westerly above. Peak wind is 75 
kts at 180 mb. Precipitable water is above average for this time of year at 1.38 inches. 


Krautmann 


&& 


Previous discussion... /issued 459 am CST Tuesday Mar 3 2015/ 


Short term /today through Thursday night/... 


There are quite a few forecast issues in the first three days of 
the forecast. First...dense fog is expected this morning and 
again tonight into Wednesday morning. Second...what effects the 
fog...the marine layer...and any isolated to scattered showers 
will have on high temperatures today and tomorrow. 
Third...determining the timing and strength of the very strong 
Arctic cold front that will arrive Wednesday night and early 
Thursday morning...and whether low level temperatures will be cold 
enough to support anything other than rain before drier air 
arrives on Thursday. 


The basic pattern through the early evening hours on Wednesday 
will not change much locally. A surface ridge extending west from 
high pressure over the Atlantic Ocean will maintain light to 
moderate southerly winds across the forecast area along with warm 
and moist flow off the Gulf of Mexico. Dense fog has been pretty 
much widespread since just before midnight across most of the 
forecast area except the warmer offshore coastal waters. The dense 
fog advisory remains in effect until 9 am this morning...and this 
will likely need to be extended by an hour or two for some areas 
over and near the tidal lakes and coast. Regarding the rain 
chances...there has not been much on radar since midnight...so 
little if any shower activity is expected through the early 
morning hours. After sunup...a few showers should start to develop 
across the mainly inland portions of the forecast area...and some 
better rain chances will exist for areas along and west of I-55 
and Lake Pontchartrain. There should be just enough breaks in 
cloud cover later this morning and this afternoon for temperatures 
to respond well like yesterday...so have gone pretty close to the 
mav highs...except shaved a couple degrees off in coastal areas 
due to the southerly winds coming off the persistently cool near 
shore water. 


Tonight and tomorrow should be a repeat with widespread dense fog 
developing in coastal areas and over the tidal lakes and 
lower Mississippi River Delta early in the evening and the more 
inland areas by late evening or midnight. Any rainfall tonight 
should be isolated and brief...and although winds will be slightly 
higher than early this morning...they are not expected to be 
strong enough to mix out the very low stratus and fog. After the 
fog lifts Wednesday morning...temperatures are expected to be on 
the warm side...from the middle 70s to around 80. There could be a 
few more showers and some thunderstorms around in some 
areas...however the higher likely to categorical rain chances 
will be near and behind the strong cold front that will arrive 
Wednesday night. 


The models have trended higher with the lows Wednesday night...so 
the chance for freezing rain is a bit lower as well...so 
confidence remains low. All the models indicate the lowest 
temperatures /in the lower 30s/ will occur after 6 am and likely 
in the 7 to 9 am period...so have only mentioned a chance of rain 
or freezing rain in the 6 am to 10 am period for the same general 
area as before...basically along and north of a line from near New 
Roads to McComb...and have only indicated trace to one hundredth 
of an inch of ice accumulation. Even with the model trends...the 
current forecast is on the colder side of the operational and 
ensemble MOS guidance. Based on this...impacts from any light 
freezing rain appear minimal at this time. The chance of cold rain 
will be ending during the late morning on Thursday across inland 
areas...but lingering in some coastal areas and offshore through 
Thursday night. Temperatures will be much colder for highs on 
Thursday...only reaching the upper 30s and 40s and brisk north 
wind producing colder wind chill temperatures. Model guidance is 
rather cold on Thursday night...but again not quite as cold as 
some prior runs. Have blended in some of the colder European model (ecmwf) 
temperatures which brings a light freeze to a large part of the 
forecast area except the southeast Louisiana coast and areas south 
of Lake Pontchartrain. 


Long term /Friday through Monday night/... 


An active southern stream may bring our next disturbance and 
chance of rain at some point over the weekend...but confidence is 
low in the timing of this at the moment. Otherwise...Friday will 
remain well below normal and on the cold side with a brisk north 
wind. Temperatures will then gradually recover over the weekend 
into early next week...and should finally return back closer to 
the seasonal normals on Monday. 


22/dew point 


Aviation... 


Widespread fog is reducing visibilities to one quarter mile or less 
at the terminals this morning. As a result...prevailing vlifr 
conditions will continue at all of the terminals through 15-16z this 
morning. The boundary layer will begin to see some increased mixing 
after 16z...allowing visibilities to improve into MVFR range...and 
the ceilings to rise to around 1000 feet. Ceilings should 
eventually rise to around 1500 to 2500 feet after 20z...resulting in 
MVFR conditions at all of the terminals. However...conditions are 
primed for another round of low ceilings and reduced visibilities at 
all of the terminals after 03z. Expect to see fog begin forming 
around 03z and gradually thicken back to one quarter mile or less 
after 06z. Ceilings will also fall back to 200 feet or less as the 
fog increases. 32 


Marine... 


Onshore flow of 10 to 15 knots on the western periphery of a surface 
ridge will continue through tonight. Winds will increase into 
exercise caution range over the waters beyond 20 nautical miles 
tomorrow afternoon as the pressure gradient increases in response to 
an approaching area of low pressure and cold front. This onshore 
flow has allowed for dense advection fog to form over the cooler 
nearshore waters...sounds...and tidal lakes this morning. The dense 
fog should linger through late morning before lifting. 
Unfortunately...another round of dense fog is expected for tonight 
as the onshore flow continues. 


A strong cold front will sweep through the waters Wednesday night 
into early Thursday...resulting in a period of strong offshore winds 
of 25 to 30 knots and seas of 6 to 9 feet in the open Gulf waters. 
These Small Craft Advisory conditions will persist through Thursday 
night. As the surface high settles over the deep south on 
Friday...gradient flow will ease back into exercise caution range of 
15 to 20 knots. A general northeast wind of around 15 knots will 
remain in place through the weekend as a surface high remains 
parked over the deep south and the pressure gradient over the Gulf 
remains fairly constant. Seas will range from 3 to 6 feet in the 
open Gulf waters during this period. 32 


Decision support... 


Dss code...blue. 
Deployed...none. 
Activation...none. 
Activities...slurry support 
dense fog threat this morning and tonight 


Decision support services (dss) code legend 
green = no weather impacts that require action 
blue = long fused watch/warning/advisory in effect or high 
visibility event 
yellow = heightened impacts with short fused 
watch/warning/advisory issuances; radar support 
Orange = high impacts - slight to moderate risk severe; nearby 
tropical events; hazmat or other large episodes 
red = full engagement for moderate to high risk severe 
and/or direct tropical threats; events of National 
significance. 


&& 


Preliminary point temps/pops... 
mcb 76 63 78 32 / 40 20 40 80 
btr 78 65 80 34 / 40 20 40 70 
asd 74 59 77 41 / 20 20 30 60 
msy 77 63 80 44 / 30 20 30 60 
gpt 71 59 75 46 / 20 20 30 60 
pql 72 57 76 47 / 20 20 30 60 


&& 


Lix watches/warnings/advisories... 
la...dense fog advisory until 9 am Tuesday for the following zones: 
Ascension...Assumption...East Baton Rouge...East 
Feliciana...Iberville...Livingston...lower 
Jefferson...lower Lafourche...lower Plaquemines...lower St. 
Bernard...lower Terrebonne...northern 
Tangipahoa...Orleans...Pointe Coupee...southern 
Tangipahoa...St. Charles...St. Helena...St. James...St. 
John The Baptist...St. Tammany...upper Jefferson...upper 
Lafourche...upper Plaquemines...upper St. Bernard...upper 
Terrebonne...Washington...West Baton Rouge...and West 
Feliciana. 


GM...dense fog advisory until 9 am Tuesday for the following zones: 
Breton Sound...Chandeleur Sound...coastal waters from 
Boothville la to the Southwest Pass of the Mississippi 
River out 20 nm...coastal waters from Pascagoula MS to 
Stake Island la out 20 nm...coastal waters from Port 
Fourchon to lower Atchafalaya River out 20 nm...coastal 
waters from the Southwest Pass of the Mississippi River to 
Port Fourchon out 20 nm...Lake Borgne...Lake Pontchartrain 
and Lake Maurepas...and Mississippi Sound. 


MS...dense fog advisory until 9 am Tuesday for the following zones: 
Amite...Hancock...Harrison...Jackson...Pearl 
River...Pike...Walthall...and Wilkinson. 


GM...dense fog advisory until 9 am Tuesday for the following zones: 
Breton Sound...Chandeleur Sound...coastal waters from 
Boothville la to the Southwest Pass of the Mississippi 
River out 20 nm...coastal waters from Pascagoula MS to 
Stake Island la out 20 nm...coastal waters from Port 
Fourchon to lower Atchafalaya River out 20 nm...coastal 
waters from the Southwest Pass of the Mississippi River to 
Port Fourchon out 20 nm...Lake Borgne...Lake Pontchartrain 
and Lake Maurepas...and Mississippi Sound. 


&& 


$$ 



National Weather Service Glossary of Abbreviations

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