National Weather Summary for Monday, May 7, 2018
by David Moran, on May 7, 2018 10:05:18 AM
Thunderstorms are forecast to develop across the Northern Rockies and Northern High Plains on Monday.
- Thunderstorms for the Northern Rockies and Northern High Plains on Monday
- Potential for Thunderstorms Tuesday across the Northern Plains and Mid Missouri Valley
- Risk for Thunderstorms across Missouri, Illinois, and Kentucky on Wednesday
Thunderstorms for the Northern Rockies and Northern High Plains on Monday
A weak area of low pressure over eastern Montana and its associated cold front will aid in the development of thunderstorms during the mid to late afternoon hours. Thunderstorm coverage will be greatest between 3pm and 10pm. Damaging winds and large hail will be the primary hazards. A few storms may persist through early Tuesday morning.
Major Cities in Region: Gillette, WY, Rapid City, SD, Pierre, SD
Thunderstorm Risk for Monday
Potential for Thunderstorms Tuesday across the Northern Plains and Mid Missouri Valley
Moderately strong low-level surface winds will allow moisture to increase across the region on Tuesday. This moisture, combined with warming temperatures, will allow instability to build throughout the day. An approaching cold front will be the focus for the development of scattered showers and thunderstorms. General thunderstorms will likely be ongoing early Tuesday across the Dakotas but additional thunderstorms are expected during the late afternoon and overnight hours. Damaging winds and large hail will be the primary hazards with these storms.
Major Cities in Region: Sioux Falls, SD, Omaha, NE. Kansas City, MO
SPC Convective Outlook for Tuesday
Risk for Thunderstorms across Missouri, Illinois, and Kentucky on Wednesday
An area of low pressure is forecast to move east-southeastward from western Minnesota into the western Great Lakes on Wednesday. Near and to the southeast of the low, instability will build during the late afternoon and early evening. With this instability in place, isolated strong to severe thunderstorms are expected to develop. Damaging winds and large hail will be the primary hazards with these storms.
Major Cities in Region: St. Louis, MO, Paducah, KY, Evansville, IN, Indianapolis, IN
SPC Convective Outlook for Wednesday
A Look Ahead
As the area of low pressure described above continues to move eastward on Thursday, showers and thunderstorms may develop from the Great Lakes southward to the Ohio River Valley. Another area of low pressure will move into the Northern Plains on Friday, bringing showers and thunderstorms to portions of the Northern Plains and Upper Midwest. This activity is forecast to move into the Great Lakes on Saturday.
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