« Where have all the "Bermuda Highs" gone? | Main | Moon and Jupiter in midnight rendezvous »

July 29, 2010

Thunderstorm cuts the heat

That noise you heard was the cold front sweeping through. The thunderstorms that crossed the region this afternoon dropped temperatures at BWI-Marshall from 91 degrees to 75 degrees between 1 and 2 p.m. As the sun returned, readings again began to climb, but the worst may be behind us.

The storm that crossed Baltimore City left 1.26 inches of rain in the gauge at The Sun's station, Calvert and Centre streets. That brings the month's total to 5.81 inches. The airport total stopped short at 0.41 inch - exactly the same as we saw in Sunday's storm. The July total is now 4.36 inches. The July average is 3.85 inches.

From here, we should see skies clear off and humidity levels drop as cooler, drier air moves in from the north and west.

Daytime temperatures should stay in the 80s at least until the middle of next week, according to the forecast from the National Weather Service in Sterling, Va. Then we can look forward, again, to daytime highs in the 90s. The summer's total so far: 41 days at 90 or more, and counting.

Even before this latest rain, Central Maryland had dropped out of the dry (colored) sections of the state's Drought Monitor map. The proportion of the state experiencing dry conditions nevertheless increased during the week ending on Tuesday as dry conditions pushed west to Garrett County. Washington County and most of Frederick remain in moderate drought, as do portions of Southern Maryland and the Lower Eastern Shore.

Worcester and most of Somerset counties have slipped back into severe drought.


Posted by Frank Roylance at 3:09 PM | | Comments (0)
Categories: Storm reports

Post a comment

All comments must be approved by the blog author. Please do not resubmit comments if they do not immediately appear. You are not required to use your full name when posting, but you should use a real e-mail address. Comments may be republished in print, but we will not publish your e-mail address. Our full Terms of Service are available here.

Verification (needed to reduce spam):

About Frank Roylance
This site is the Maryland Weather archive. The current Maryland Weather blog can be found here.
Frank Roylance is a reporter for The Baltimore Sun. He came to Baltimore from New Bedford, Mass. in 1980 to join the old Evening Sun. He moved to the morning Sun when the papers merged in 1992, and has spent most of his time since covering science, including astronomy and the weather. One of The Baltimore Sun's first online Web logs, the Weather Blog debuted in October 2004. In June 2006 Frank also began writing comments on local weather and stargazing for The Baltimore Sun's print Weather Page. Frank also answers readers’ weather queries for the newspaper and the blog. Frank Roylance retired in October 2011. Maryland Weather is now being updated by members of The Baltimore Sun staff

Sign up for FREE weather alerts*
Get free Baltimore Sun mobile alerts
Sign up for weather text alerts

Returning user? Update preferences.
Sign up for more Sun text alerts
*Standard message and data rates apply. Click here for Frequently Asked Questions.
Maryland Weather Center

Area Weather Stations
Resources and Sun coverage
• Weather news

• Readers' photos

• Data from the The Sun's weather station

• 2011 stargazers' calendar

• Become a backyard astronomer in five simple steps

• Baltimore Weather Archive
Daily airport weather data for Baltimore from 1948 to today

• National Weather Service:
Sterling Forecast Office

• Capital Weather Gang:
Washington Post weather blog

• CoCoRaHS:
Community Collaborative Rain, Hail and Snow Network. Local observations by volunteers

• Weather Bug:
Webcams across the state

• National Data Buoy Center:
Weather and ocean data from bay and ocean buoys

• U.S. Drought Monitor:
Weekly maps of drought conditions in the U.S.

• USGS Earthquake Hazards Program:
Real-time data on earthquakes

• Water data:
From the USGS, Maryland

• National Hurricane Center

• Air Now:
Government site for air quality information

• NWS Climate Prediction Center:
Long-term and seasonal forecasts

• U.S. Climate at a Glance:
NOAA interactive site for past climate data, national, state and city

• Clear Sky Clock:
Clear sky alerts for stargazers


• Hubblesite:
Home page for Hubble Space Telescope

• Heavens Above:
Everything for the backyard stargazer, tailored to your location

• NASA Eclipse Home Page:
Centuries of eclipse predictions

• Cruise Critic: Hurricane Zone:
Check to see how hurricanes may affect your cruise schedule

• Warming World:
NASA explains the science of climate change with articles, videos, “data visualizations,” and space-based imagery.

• What on Earth:
NASA blog on current research at the space agency.
Most Recent Comments
Blog updates
Recent updates to news blogs
 Subscribe to this feed
Charm City Current
Stay connected