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US Drought Monitor

July 16, 2011

Full Article at

National Drought Summary — July 12, 2011

The discussion in the
Looking Ahead section is simply a description of what the official national
guidance from the National Weather Service (NWS) National Centers for
Environmental Prediction is depicting for current areas of dryness and
drought. The NWS forecast products utilized include the HPC 5-day QPF and
5-day Mean Temperature progs, the 6-10 Day Outlooks of Temperature and
Precipitation Probability, and the 8-14 Day Outlooks of Temperature and
Precipitation Probability, valid as of late Wednesday afternoon of the USDM
release week. The NWS forecast web page used for this section is:
Weekly Weather
With the main storm
track continuing over the northern half of the lower 48 States, high pressure
over the southern Plains exacerbated the drought, keeping this area
precipitation free and unseasonably hot (highs exceeding 110 deg F). Weak
fronts stalled out across the Southeast, generating hit and miss showers and
thunderstorms, with some locally heavy. Some Southeastern areas (southeastern
Virginia and much of the Carolinas) received substantial rainfall. Heavy,
widespread convective thundershowers inundated most of Florida while
monsoonal showers continued and intensified over parts of the Southwest. Most
of the Nation recorded near to above-normal temperatures, including parts of
the West (notably California) which had observed a cold and wet spring and
early summer.The Upper Midwest,
Northeast, and Mid-Atlantic:
A series of frontal passages sparked showers and thunderstorms
that dropped moderate to heavy rains (more than 2 inches) across southern
Pennsylvania, New Jersey, the Delmarva Peninsula, and southern Virginia. 3 to
4 inches of rain soaked parts of southern New Jersey, while 4 to 8 inches inundated
southeastern Virginia. Accordingly, a 1-category improvement was made where
the greatest totals occurred, with D0 removed from southern New Jersey and
south-central Virginia, D1 trimmed to D0 in the Delmarva Peninsula, and the
D2 in the Delmarva Peninsula diminished. D2(AH) was kept where long-term
deficits remained (90-days: 5-10 inches; 6-Months: 8-12 inches; 12-Months:
12-16 inches), even with this week’s beneficial rains. A 2-category
improvement was made in southeastern Virginia (D1 to nothing) due to the
excessive rainfall, and similar conditions extended southward into northern
North Carolina (see Southeast text). The dam at Lake Chesdin which supplies
water for the southwest suburbs of Richmond, VA, reached full capacity with
water spilling over the top, effectively ending all water restrictions there.



<snip>-more regional information in the article

Full Article at

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