Monday Forecast Updated at 3:45 PM


Tonight:
Cloudy with showers and storms. Low: 58-60. Wind: S 10-20 mph.

Tuesday: Mostly cloudy with a 60% chance of showers/storms. High: 72-76. Wind:  S 10-20 mph.

Tuesday Night: Mostly cloudy with a 40% chance of showers/storms. Low: 56-59. Wind: S 5-10 mph.

Wednesday: Mostly cloudy with a 30% chance of showers/storms. High: low 70s.

Thursday: Mostly cloudy with a 40% chance of showers/storms. High: low 70s.

Friday: Mostly cloudy with a 30% chance of showers. High: upper 60s.

Saturday: Mostly cloudy with a 20% chance of showers. High: mid 60s.

Sunday: Partly cloudy. High: upper 60s.

Monday: Partly cloudy. High: upper 60s.

 

Early Afternoon Analysis: There is a low pressure system over northeast Montana with a cold front extended south through the Dakotas to the Texas panhandle. See map below.


The front is going to move VERY slowly east due to the big trough of low pressure over the western half of the nation and a ridge of high pressure over the east half. See map below.


A pattern like this keeps things generally stagnant. For example, we have been very warm and dry for the last week since we were under the ridge. The trough is now forecast to move into the middle of the country with more unsettled weather for us during the next few days.

This Evening/Tonight: The sky will be cloudy with showers and thunderstorms moving in to the area from the southwest. Some gusty winds and small hall are possible with the storms initially this evening. The threat for any severe weather is low.  

Tuesday/Tuesday Night: The front will slowly move eastward with still more chances of showers/storms at any point in the day or night. It will be another warm day with highs in the 70s and lows in the 50s.

Wednesday:  At this point the upper low starts to get cut-off from the upper level flow. The low will be located over Texas. There is some slight ridging coming in from the east. This configuration would keep us a little drier Wednesday…especially far eastern Iowa. The map below shows the possible amount of rain from Monday evening Wednesday evening.


Extended Forecast (Thu-Mon):
The upper level low will move across Iowa Thursday and Friday with clouds and a scattering of showers. The low finally moves east on Saturday with just a few light showers possible. High pressure at the surface will move in from the north and provide us with a mix of sun and clouds Sunday and Monday. High temperatures during the extended forecast will remain above normal.

Long Range Forecast (Mar 27-Apr 2): The Climate Prediction Center has Iowa with above normal temperatures and near to above normal precipitation.

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Posted under Forecast Discussion

This post was written by Schnack on March 19, 2012

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