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Thunderstorms and heavy rain persisted in the South on Thursday, while rain moved into the West Coast.

A strong low pressure system spinning over the Gulf of Mexico advanced northeastward and into the Southeastern states on Thursday. Counter-clockwise flow around this system pushed ample moisture onshore and created a strong warm front that stretched from the Tennessee Valley through the Carolinas.

This front kicked up moderate to heavy showers and thunderstorms. There was a slight chance of severe thunderstorms development in these areas but has not yet developed. To the south, stronger storms developed along a cold front that extended over Florida and into the eastern Gulf of Mexico.

Warm and humid conditions ahead of this frontal boundary created favorable conditions for thunderstorm development. Severe thunderstorms with large hail, strong winds, and heavy rainfall were likely across southern and central Florida.

Just to the north, a low pressure system north of the Great Lakes pushed a cold front over the Great Lakes and Upper Midwest. This brought a few more snow showers to parts of northern Michigan, while rain showers developed over Wisconsin, Minnesota, and Iowa.

In the West, a strong low pressure system off the West Coast pushed a cold front onshore. Plenty of Pacific moisture associated with this system allowed for heavy rain to develop along this cold front as it moved over central and northern California. Lighter and more widespread showers developed across Washington and Oregon. Rainfall totals approached 1 inch in many areas of northern California by midday on Thursday.

THURSDAY'S WEATHER EXTREMES:

HIGHEST TEMPERATURE (DEGREES F).........................87 Palm Springs, Calif.

HIGHEST HEAT INDEX (DEGREES F)..........................88 Homestead AFB, Fla.

LOWEST TEMPERATURE (DEGREES F)..........................1 Mt. Washington, N.H.

LOWEST WIND CHILL (DEGREES F)...........................-44 Umiat, Alaska

HIGHEST WIND GUST (MPH).................................102 Mt. Washington, N.H.

HIGHEST PRECIPITATION (INCHES)..........................2.49 Sarasota, Fla.

ON THIS DATE....... On this date in 1990, parts of New York were covered in snow after a strong storm moved through the area. A record snowfall of 5.8 inches of was reported in Buffalo, while nearly a foot of snow fell in Warsaw and 9.5 inches fell in Rochester.

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