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Thunderstorms will continue across portions of South Texas on Friday ahead of a cold front. An upper level trough moving through the Ohio Valley and Northeast may allow for the development of thunderstorms across the region. Excessive rainfall is forecast for portions of South Texas.

  • Thunderstorms for South Texas on Friday
  • Potential for Thunderstorms Friday across the Ohio Valley and Northeast
  • Excessive Rainfall for South Texas Friday
  • Thunderstorms Saturday for Portions of Alabama and Mississippi

US Hazards Friday, May 4, 2018US Hazards

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Thunderstorms for South Texas on Friday
Thunderstorms will continue across south Texas this morning ahead of a cold front. Additional thunderstorms are expected to develop during the afternoon as instability increases across the region. Damaging winds will be the primary concern, but a few storms may produce large hail.

Major Cities in Region: Del Rio, TX, San Antonio, TX

Thunderstorm Risk for Friday, May 4, 2018Thunderstorm Risk for Friday

Potential for Thunderstorms Friday across the Ohio Valley and Northeast
The upper level trough that has been responsible for severe weather in the Plains the past few days will move into the Northeast today. As it does, the associated surface low will intensify over the Great Lakes and move northeastward. Moist air combined with daytime heating will allow for the development of thunderstorms; a few storms may become supercells. Damaging winds will be the primary hazard, but an isolated tornado or two cannot be ruled out. Storms should diminish after dark with the loss of daytime heating. 

Major Cities in Region: Cleveland, OH, Pittsburgh, PA, Buffalo, NY, Albany, NY, Burlington, VT

Thunderstorm Risk for Friday, May 4, 2018Thunderstorm Risk for Friday

Excessive Rainfall for South Texas Friday
Heavy to excessive rainfall is expected across south Texas on Friday as thunderstorms continue across the region.  Rainfall amounts of 1-2 inches with locally higher amounts in excess of 3 inches are forecast..

Major Cities in Region: Del Rio, TX, San Antonio, TX, Austin, TX, Waco, TX, College Station, TX

Rainfall Accumulation for Friday, May 4, 2018Rainfall Accumulation for Friday

Thunderstorms Saturday for Portions of Alabama and Mississippi
As the trough currently over Texas moves eastward, thunderstorms may develop across portions of Mississippi and Alabama on Saturday. With moist air in place, instability should be sufficient for the development of strong to severe thunderstorms. Although widespread coverage is not expected, some storms may produce damaging winds. Thunderstorms may spread northeastward in the evening as the trough continues to move eastward.

Major Cities in Region: Columbus, MS, Huntsville, AL

SPC Convective Outlook For Saturday, May 5, 2018SPC Convective Outlook For Saturday

A Look Ahead
Showers and thunderstorms will move into the Mid Atlantic on Sunday as the upper level trough described above continues to move eastward. Across the Northern Plains, showers and thunderstorms may develop Monday into Tuesday as an area of low pressure develops. This activity will move into the Upper Midwest and Great Lakes on Wednesday.

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.



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