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Area forecast discussion...updated 
National Weather Service Pocatello Idaho 
853 PM MDT Friday Mar 19 2010 


Update...we did another quick update to decrease cloud cover a 
little earlier this evening...even across the eastern/southeastern 
mountains. Otherwise...the forecast appears on track for tonight. Keyes 


&& 


Previous discussion... /issued 426 PM MDT Friday Mar 19 2010/ 


Update...we did a quick update to account for instability showers 
across portions of the area...mainly for the eastern portion of 
the central mountains across the snake plain and into the southern 
Highlands. Precipitation amounts will be light and most of this should 
die down once the sun sets. The exception will be along the 
Wyoming border closer to the wave moving along The Divide. Keyes 


Previous discussion... /issued 1242 PM MDT Friday Mar 19 2010/ 


Short term...tonight through Sunday night 
much of the County Warning Area is having a mainly sunny and dry afternoon 
although a bit on the chilly side. A short wave dropping southward 
will spread some clouds into the eastern Highlands this afternoon 
and tonight and some locations should see a few snow showers. 
But with the best moisture and dynamics remaining to the east 
any accumulation should be very light. With the short wave 
departing and ridging building in from the west just about all 
precipitation should end shortly after midnight. Dry and warming 
weather is expected for the weekend along with plenty of sunshine 
with Sunday the warmest day with some places in the lower snake 
plain and eastern Magic Valley seeing high temperatures cracking 
60. A trough approaching from the west on Sunday night will help 
to squash the ridge a bit and spread a chance of precipitation 
back into the central mountains. However the models have slowed a 
bit and most precipitation should hold off until late on Sunday 
night. Ch. 


Long term...Monday through next Friday. 
The 12z GFS and 00z European model (ecmwf) were showing fairly comparable solutions 
through the period with Pacific disturbances moving inland 
Monday/Tuesday and Friday. A weaker wave passing just to our north 
was also indicated by both models Thursday. Thus have bumped 
precipitation potential upwards on Monday/Tuesday and Friday and then 
maintained lower end potential for thursdays passing wave. 
Seasonable temperatures expected throughout the period. Huston 


Aviation... 
VFR conditions will prevail through Saturday as a ridge 
of high pressure builds over the northwest states. Huston 


&& 


Pih watches/warnings/advisories... 
none. 
&& 


$$