Latest from NOAA 4-21-10
Things may be shaping up for some severe storms on Friday for the San Antonio area. Although they will probably be scattered, they could reach severe levels. Here is the latest from NOAA at Noon, 4-21-10.
NOAA Special Weather Statement:
We are looking at the possibility of some severe weather toward the end of the week. A large upper low over the Western U.S. will start to move into the Southern Rockies...and then across Texas on Friday and Saturday. A couple of disturbances will be coming our way, interacting with gulf moisture to create a chance for showers/thunderstorms/severe thunderstorms. Small chances of severe weather will exist late Thursday over our far western areas as some strong storms may develop along the Mexican mountains and try to cross the Rio Grande late Thu night.
A strong wave will move into the Edwards Plateau on Friday afternoon and Friday night...helping to trigger thunderstorms along and ahead of a dryline. There are many severe weather ingredients coming together across the southern plains...including a strong jet stream, a dryline, and gulf moisture. Location and severity of the storms will be highly dependent on where the dryline sets up during the day on Friday. The best chances of severe thunderstorms will be along and east of the dryline. Models are showing that the dryline will be hanging around South Central Texas during the day on Friday...then shifting east overnight as the upper wave moves across the area. I will say however, that trying to determine the placement of the dryline several days out is very difficult. For that reason...all areas of south central Texas should be aware of this storm threat and be ready for some possible severe weather Friday afternoon and Friday night. Large hail will be the primary threat...but strong damaging winds and isolated tornadoes will also be possible.
As the event gets closer, we will provide additional updates to better focus our threat areas and timing of the event. As of right now...that threat time appears to be from 4pm Fri to 6am Saturday. The threat shifts east during the night...into Saturday morning.
Please check out our website at www.srh.noaa.gov/ewx for additional details, forecasts, and graphics.
Paul Yura
National Weather Service Austin-San Antonio TX
We are looking at the possibility of some severe weather toward the end of the week. A large upper low over the Western U.S. will start to move into the Southern Rockies...and then across Texas on Friday and Saturday. A couple of disturbances will be coming our way, interacting with gulf moisture to create a chance for showers/thunderstorms/severe thunderstorms. Small chances of severe weather will exist late Thursday over our far western areas as some strong storms may develop along the Mexican mountains and try to cross the Rio Grande late Thu night.
A strong wave will move into the Edwards Plateau on Friday afternoon and Friday night...helping to trigger thunderstorms along and ahead of a dryline. There are many severe weather ingredients coming together across the southern plains...including a strong jet stream, a dryline, and gulf moisture. Location and severity of the storms will be highly dependent on where the dryline sets up during the day on Friday. The best chances of severe thunderstorms will be along and east of the dryline. Models are showing that the dryline will be hanging around South Central Texas during the day on Friday...then shifting east overnight as the upper wave moves across the area. I will say however, that trying to determine the placement of the dryline several days out is very difficult. For that reason...all areas of south central Texas should be aware of this storm threat and be ready for some possible severe weather Friday afternoon and Friday night. Large hail will be the primary threat...but strong damaging winds and isolated tornadoes will also be possible.
As the event gets closer, we will provide additional updates to better focus our threat areas and timing of the event. As of right now...that threat time appears to be from 4pm Fri to 6am Saturday. The threat shifts east during the night...into Saturday morning.
Please check out our website at www.srh.noaa.gov/ewx for additional details, forecasts, and graphics.
Paul Yura
National Weather Service Austin-San Antonio TX
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