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Next 12 Hours

Forecast data from the National Digital Forecast Database.

5 Day Forecast

• Wednesday
• 
• High: 88 °
• Low: 68 °
• T-Storms

• Thursday
• 
• High: 91 °
• Low: 68 °
• Chance of a Thunderstorm

• Friday
• 
• High: 91 °
• Low: 64 °
• Partly Cloudy

• Saturday
• 
• High: 88 °
• Low: 66 °
• Partly Cloudy

• Sunday
• 
• High: 90 °
• Low: 64 °
• Partly Cloudy

Area forecast discussion 
National Weather Service New Orleans la 
317 PM CDT Wednesday may 22 2013 


Discussion... 


An upper level disturbance continues to move eastward this 
afternoon. Although thunderstorm activity has decreased in 
coverage...a few thunderstorms still remain. Through the remaining 
afternoon hours...most of the activity will affect Terrebonne and 
possibly Lafourche parishes before moving over the northern Gulf. 


A trough will begin to set up over the northeastern states tomorrow. 
This will allow for a wedge or otherwise known as a backdoor front 
to move in from the northeast late Thursday into Friday. We could 
see additional showers and possibly brief thunderstorms along the 
front before clearing skies and a ridge of high pressure moves in 
time for the weekend. 


Expect for daytime temperatures to remain near normal this weekend 
especially with the expected sunshine. However...the lower 
dewpoints will make conditions feel slightly more pleasant. 
Overnight temperatures will be running below normal especially for 
the Northshore. 


Ridge breaks down by Monday as the center of the high shifts more 
to the east allowing for a southerly flow to once again establish 
itself across the region. Expect moisture to increase during the 
week and temperatures to continue to rise quite possibly above 
normal. Moisture should be deep enough to allow the afternoon 
Summer like storm by middle week. 


7/arm 


&& 


Aviation... 


18z taf discussion...scattered showers and isolated thunderstorms 
continue to impact southeast la and S MS. Outside of any convection... 
expect VFR conditions to prevail through the afternoon hours. With 
increased moisture and light winds forecast overnight...low ceilings 
and patchy fog will once again be possible. Have included tempo 
groups at nearly all taf sites for MVFR or IFR ceilings and/or visibilities. 
Expect conditions to improve after sunrise. 


&& 


Marine... 


High pressure ridge will establish itself across the area 
beginning on Friday and continue through the weekend. As a 
result...this will produce an offshore flow. There is some 
potential...especially in the eastern waters...of a period of 
exercise caution conditions Friday night into Saturday morning as 
drier air works in. Onshore flow returns Sunday night and will 
continue through much of next week. 


&& 


Decision support... 
dss code...blue. 
Deployed...none. 
Activation...none. 
Activities...slurry support. 
Monitoring river flooding. 
Monitoring convection and heavy rainfall trends. 


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 65 90 65 87 / 10 20 20 10 
btr 68 91 69 89 / 10 20 10 20 
asd 68 89 68 88 / 20 20 20 10 
msy 70 88 71 88 / 10 20 10 20 
gpt 68 87 69 88 / 20 20 20 10 
pql 67 87 66 89 / 20 20 20 10 


&& 


Lix watches/warnings/advisories... 
la...none. 
GM...none. 
MS...none. 
GM...none. 
&& 


$$