Posted: Jul 31, 2013 1:36 PM by Meteorologist Mike Heard
Updated: Jul 31, 2013 1:37 PM
A very active weather pattern is anticipated to develop Thursday through Saturday across Montana. A slow moving vigorous pacific storm system will track from the pacific NW into Western Montana and lift up into Saskatchewan, Canada.
NWS offices in Missoula and Great Falls are estimating .25" to .50" in SW Montana with up to 1"-2" over the higher mountain peaks of NW Montana. The STORMTracker Tru Vu Rainfall forecast, using the RPM model, is estimating about the same. See attached graphics.
Storm Prediction Center has much of Southern Montana in the "Slight" risk for Severe Thunderstorms Thursday afternoon. Numerous thunderstorms are expected to develop ahead of this approaching storm system Thursday afternoon and evening. Some of these storms, if conditions are just right, could produce damaging winds and damaging large diameter hail. Also, look for periods of heavy rainfall which could lead to localized flash flooding and plenty of dangerous lightning.
As the Low moves in Friday morning a much cooler airmass will drop into the state and afternoon highs will be a good 10° or more below normal and gusty winds are possible as well.
Look for frequent updates on this changing weather pattern here on our web sites and on our facebook pages from Chief Meteorologist Mike Heard.