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Helping Business Weather the Storm

National Weather Summary for Thursday, July 13, 2017

by David Moran, on Jul 13, 2017 11:14:32 AM

A cold front will be the focus for the development of thunderstorms from the Central Plains to the Northeast on Thursday. 

  • Risk for Thunderstorms Thursday from the Central Plains to the Northeast
  • Thunderstorm Potential Friday from the Mid Mississippi Valley to the Northeast
  • Strong to Severe Thunderstorms for the Northern High Plains on Friday
  • Thunderstorms Friday across Eastern Colorado
  • Potential for Thunderstorms across the Western Great Lakes on Saturday
  • Thunderstorms Saturday across Georgia and the Carolinas
  • Strong to Severe Thunderstorms for Southern ArIzona on Saturday

US Hazards for Thursday, July 13, 2017US Hazards

Assess Your Weather Risk

Risk for Thunderstorms Thursday from the Central Plains to the Northeast
A stalled front extending from the mid-Mississippi Valley through the Central Plains will provide a focus for isolated to scattered development across the region today. The primary timing for thunderstorms will be this afternoon and evening, with a low potential for strong to severe thunderstorms containing gusty winds and hail. Some storms may persist into the overnight hours but should be weakening by this time. 

Further east, a broad area of low pressure over the Great Lakes and Northeast and associated frontal boundaries moving slowly south and southeastward will allow for the development of thunderstorms. Some thunderstorms are currently ongoing across western portions of New York and Pennsylvania and as well as southwestward through the Ohio Valley. These storms are below severe limits at this time, but will likely reintensify later this afternoon. Outflow boundaries will promote additional thunderstorm development as well. As daytime heating increases, there will be a potential for strong to severe thunderstorms throughout the region. Damaging winds will be the primary hazard, though some of the more organized activity could contain large hail and a low risk of tornadoes.

Update 1:48pm EDT: Thunderstorms beginning to develop across New England.

Radar 1:48pm EDT 7/13/17Radar 1:48pm EDT

Update 2:08pm EDTSevere Thunderstorm Watch in effect until 9pm EDT for portions of Connecticut, Massachusetts, New Jersey, and New York. 

Severe Thunderstorm Watch 7/13/17Severe Thunderstorm Watch

Update 2:19pm EDT: Severe thunderstorms continuing to develop across New England.

Radar 2:19pm EDT 7/13/17Radar 2:19pm EDT

Update 3:04pm EDT: Severe Thunderstorm Watch for portions of New Jersey and Pennsylvania until 9pm EDT.

Severe Thunderstorm Watch 7/13/17Severe Thunderstorm Watch

Major Cities in Region: Goodland, KS, Wichita, KS, Kansas City, MO, St. Louis, MO, Indianapolis, IN, Cleveland, OH, Washington, DC, Philadelphia, PA, New York, NY, Boston, MA

Region 1 Thursday, July 13, 2017Region 1

Thunderstorm Potential Friday from the Mid Mississippi Valley to the Northeast
By Friday morning, the system that caused Thursday's severe weather should be just east of the Great Lakes with its cold front stretching across the Ohio Valley into the Ozarks and eastern Kansas. Storms from Thursday night could be ongoing Friday morning, but they should be non-severe. Destabilization is expected to occur during the day ahead of the front, allowing storms to redevelop. Isolated to scattered strong to severe thunderstorms may develop with hail and damaging winds the primary hazards.

In addition, heavy rainfall is also expected. Rainfall amounts of 1-2 inches with locally heavy amounts are forecast. Flash flooding could be a concern.

Major Cities in Region: Evansville, IN, Nashville, TN, Louisville, KY, Charleston, WV, Pittsburgh, PA, Washington, DC, Philadelphia, PA, New York, NY

SPC Convective Oultook for Friday, July 14, 2017SPC Convective Outlook for Friday

Strong to Severe Thunderstorms for the Northern High Plains on Friday
Marginal moisture and instability are expected to reach the Dakotas prior to the arrival of a cold front. Isolated strong storms may develop ahead of the front during the afternoon. Strong wind gusts and large hail will be the primary hazards.

Major Cities in Region: Rapid City, SD, Bismarck, ND, Fargo, ND, International Falls, MN

SPC Convective Outlook for Friday, July 14, 2017SPC Convective Outlook for Friday

Thunderstorms Friday across Eastern Colorado
The tail end of a cold front over far western Kansas and eastern Colorado combined with lift provided from the mountains may allow for the development of a few strong storms in the higher terrain. Strong winds and hail are the primary hazards with the stronger storms. 

Major Cities in Region: Colorado Springs, CO, Pueblo, CO

SPC Convective Outlook for Friday, July 14, 2017SPC Convective Outlook for Friday

Potential for Thunderstorms across the Western Great Lakes on Saturday
An upper level system over the region and a surface low developing in Canada will move southeastward. The low's cold front will move into the area and interact with warm moist air moving northward. This may allow for isolated strong to severe storms on Saturday.

Major Cities in Region: Minneapolis, MN, Green Bay, WI, Milwaukee, WI

SPC Convective Outlook for Saturday, July 15, 2017SPC Convective Outlook for Saturday

Thunderstorms Saturday across Georgia and the Carolinas
There is a marginal risk of isolated severe storms capable of producing damaging winds from north-central Georgia extending northeastward into the Outer Banks of North Carolina. A weak cold front, daytime heating and coastal sea-breeze activity will all contribute to the development of isolated strong thunderstorms.

Major Cities in Region: Atlanta, GA, Charlotte, NC, Savannah, GA, Charleston, SC, Raleigh, NC, Norfolk, VA

SPC Convective Outlook for Saturday, July 15, 2017SPC Convective Outlook for Saturday

Strong to Severe Thunderstorms for Southern ArIzona on Saturday
A few strong thunderstorms may develop within some of the higher terrain of southern Arizona during the afternoon hours. Given the presence of moderate wind shear aloft, these storms will be capable of strong wind gusts.

Major Cities in Region: Phoenix, AZ, Tucson, AZ

SPC Convective Outlook for Friday, July 7, 2017SPC Convective Outlook for Saturday

A Look Ahead
Thunderstorms may develop across the Great Lakes as an upper level disturbance moves over the region. Strong winds and large hail will be the primary hazards. By Tuesday, thunderstorms may develop across the Northern Plains ahead of a cold front.

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.

Topics:Nowcast/Forecast

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