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Next 12 Hours

Forecast data from the National Digital Forecast Database.

5 Day Forecast

• Monday
• 
• High: 90 °
• Low: 50 °
• Partly Cloudy

• Tuesday
• 
• High: 70 °
• Low: 39 °
• Chance of Rain

• Wednesday
• 
• High: 59 °
• Low: 37 °
• Chance of Rain

• Thursday
• 
• High: 61 °
• Low: 41 °
• Partly Cloudy

• Friday
• 
• High: 63 °
• Low: 39 °
• Mostly Cloudy

Area forecast discussion 
National Weather Service Pocatello Idaho 
243 am MDT Monday may 21 2012 


Discussion...weak upper ridge currently over the area will shift 
eastward today as a negatively tilted trough advances into the 
Pacific northwest tonight. This trough will initiate the first of 
several rounds of showers and thunderstorms for the coming week. The 
nose of a 120 knots jet streak will enter the area Tuesday morning and 
will dip southward on Wednesday as a broad trough sets up over the 
west. The proximity of the jet combined with strong 700mb cold air 
advection will help produce near warning level winds for the snake 
plain on Tuesday. With a cold front moving through on 
Tuesday...temperatures will be notably cooler heading into the 
weekend. A secondary wave will dig the upper trough even further on 
Thursday. Have kept probability of precipitation higher than normal for the coming week 
until the upper low lifts out of the Great Basin on Sunday. 
Hinsberger 
&& 


Aviation...VFR conditions will prevail today with increasing middle 
and upper cloud cover across the region associated with a low 
pressure system advancing toward the northwest coast. Attending moisture 
and instability may be enough to trigger isolated convection across 
the central mountains near ksun. Huston 
&& 


Fire weather...increasing southwest winds are expected across the 
region today as a low pressure system advances toward the northwest coast. 
There may even be enough accompanying moisture and instability to 
help initiate convection across the central mountains later this 
afternoon and evening. The low is expected to shear into the northwest 
coast late tonight and spread east along the Canadian border Tuesday 
through Wednesday with an increasing chance of showers each day. 
Strong winds and cooler temperatures will also spread across 
southern Idaho Tuesday and Wednesday as a cold front advances across 
the region late tonight. Secondary Pacific energy digs into the northwest 
coast Thursday and Friday spinning off a closed low near northwest Nevada 
Friday afternoon placing southern Idaho in a favored position to receive 
enhanced shower activity Friday night and Saturday as the low lifts 
NE through the Great Basin. Huston 
&& 


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


$$