An upper level system moving into the Pacific Northwest will allow for the development of thunderstorms across the region on Friday.

US Hazards

Region 1
An upper level system tracking into the Pacific Northwest will allow for isolated severe thunderstorms Friday afternoon and evening. The lack of moisture will limit the severe threat, however, the strongest activity will have the potential to produce large hail and damaging winds.

Major Cities in Region: Spokane, WA, Boise, ID, Missoula, MT

Region 1

Strong to Severe Thunderstorms Possible for the Great Basin on Saturday
An upper level trough will move eastward across the western US on Saturday. An area of low pressure and cold front will move into the Great Basin. Thunderstorms are expected to develop along and ahead of the front during the afternoon and evening. Gusty winds will be the primary hazard with any storm that develops.

Major Cities in Region: Salt Lake City, UT

SPC Convective Outlook for Saturday

Strong to Severe Thunderstorms Possible Sunday from the Great Plains to the Great Lakes
The upper level trough described above is forecast to track across the Central and Northern Plains on Sunday, bringing a potential for severe weather to a large area from the Southern Plains into the Great Lakes. At the surface, an area of low pressure over the Plains will track northeastward with a warm front extending to the east of the low. Scattered to widespread thunderstorms are likely to develop in the vicinity of the low and warm front. Extending to the south will be a cold front and dryline. These features will be the focus for the development by late afternoon and early evening. Large hail and damaging winds will be the primary hazards. A tornado threat may also exist over Iowa and northwestern Missouri.

Major Cities in Region: Oklahoma City, OK, Tulsa, OK, Kansas City, MO, Des Moines, IA, Milwaukee, WI, Green Bay, WI, Traverse City, WI

SPC Convective Outlook for Sunday

A Look Ahead
The area of low pressure and cold front described above will continue to intensify and move northeastward, allowing for thunderstorms from Texas to the Great Lakes on Monday. Large hail and damaging winds will be the primary hazards with these storms. Storms will continue across Texas on Tuesday as a cold front becomes stalled over Texas.

Excessive rainfall will be possible on Thursday across portions of the West Coast as a Pacific storm system moves inland. Heavy showers and perhaps a thunderstorm or two are forecast to spread inland throughout the day. The latest model guidance indicates that there will be a potential for rain amounts of 2-4 inches with locally heavier amounts in excess of 5 inches, which could allow for an increased risk of flooding and mudslides throughout the area.

This is just a brief look at current weather hazards. We can provide you site-specific weather forecast information for the purpose of protecting your personnel and assets and to assess your weather risk. Try a 7-day demo right away and learn how timely precision weather information can enhance your bottom line.