Areas of Thunderstorms and Heavy Rain Across the Country; Heat Wave Begins This Weekend

Widespread showers and thunderstorms, some severe, may bring heavy rain and flash flooding in the central Gulf Coast, Mid-Atlantic, the Upper Midwest, the Great Basin and Southwest. A stretch of unusually hot and humid weather is expected across portions of the central U.S. and the Southeast beginning this weekend. Critical fire weather conditions are expected in the Northwest and Great Basin. Read More >

Heavy Snow Event

March 6, 2008

On 6 March 2008, a convective precipitation band formed across North Texas and quickly transitioned from rain to snow in a 60 km wide zone extending from west of the Dallas / Fort Worth metroplex northeast into extreme North Texas near the Red River. The snow persisted for over three hours with accumulations averaging 7 cm and isolated reports up to 30 cm near the heaviest convective precipitation. Frontogenesis and the resulting ageostrophic circulation appeared to play key roles in not only providing significant forcing for ascent but also in modifying the vertical temperature profile to be supportive of a liquid-to-frozen precipitation transition. The presence of atmospheric instability led to isolated thunderstorm development, with occasional cloud-to-ground and in-cloud lightning observed in the band of heavy snow. This study reviews the complex interactions between moisture, instability, and forcing for ascent that occurred during this convective winter weather event.

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Areas of Thunderstorms and Heavy Rain Across the Country; Heat Wave Begins This Weekend

March 6, 2008 Snow