Thursday, July 24, 2008

Downgraded Dolly Delivers Deluges
Tropical Storm Moving Up Rio Grande Valley

2 pm Update: Tropical Storm Dolly has weakened to maximum winds of 40 mph and is now moving west northwest at 13 mph.

Hurricane Dolly was downgraded to a tropical storm last night, but it continues to drop copious amounts of precipitation on the Rio Grande Valley. The 6.68" which fell at Brownsville yesterday was a record amount for any day in July. The July total of 13.20" has also smashed the old monthly record of 9.43". The cooling effect of the rain also held the maximum temperature to 78°, which tied the coolest all-time July daily maximum. Brownsville broke another daily rainfall record earlier this month on the 8th, when 1.00" fell.

Daily records were also set at McAllen (3.09" vs. previous 0.45"), Harlingen (3.42" vs. 0.54"), Corpus Christi (2.86" vs. 1.47"),

Image from National Weather Service shows 24-hour precipitation in southern Texas ending at 7 am CDT this morning. The white area represents 10" or more. Click to enlarge.

Tropical Storm Dolly's maximum winds are now 45 mph. The storm is moving west northwest at 9 mph from a position near Laredo, Texas. Further weakening is likely today.

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