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8/21 Severe Threat - Obs/Discussion


Kmlwx

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WWUS30 KWNS 211649

SAW4

SPC AWW 211649

WW 794 SEVERE TSTM CT DC DE MD NJ NY PA VA WV CW 211655Z - 220100Z

AXIS..90 STATUTE MILES EAST AND WEST OF LINE..

45NNE ABE/ALLENTOWN PA/ - 55SSW DCA/WASHINGTON DC/

..AVIATION COORDS.. 80NM E/W /27WNW SAX - 37N RIC/

HAIL SURFACE AND ALOFT..2 INCHES. WIND GUSTS..60 KNOTS.

MAX TOPS TO 500. MEAN STORM MOTION VECTOR 27035.

LAT...LON 41247337 38097576 38097906 41247683

THIS IS AN APPROXIMATION TO THE WATCH AREA. FOR A

COMPLETE DEPICTION OF THE WATCH SEE WOUS64 KWNS

FOR WOU4.

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DISCUSSION...THUNDERSTORMS WILL INCREASE IN COVERAGE/INTENSITY THIS

AFTERNOON IN CONJUNCTION WITH CONTINUED DAYTIME HEATING...AND AS A

MIDLEVEL TROUGH AND COLD FRONT MOVE EWD/SEWD ACROSS THE REGION.

ADDITIONALLY...A SURFACE LEE TROUGH FROM NRN VA TO ERN PA/SE NY WILL

HELP FOCUS THUNDERSTORM DEVELOPMENT. MODERATE-STRONG INSTABILITY

/MLCAPE AOA 2000 J PER KG/ AND INCREASING VERTICAL SHEAR THROUGH THE

AFTERNOON WILL BE FAVORABLE FOR STORMS TO PRODUCE DAMAGING WINDS AND

LARGE HAIL. A COUPLE OF SUPERCELLS MAY ALSO DEVELOP THIS AFTERNOON

NEAR THE LEE TROUGH...AND AN ISOLATED TORNADO WILL BE POSSIBLE WHERE

LOW-LEVEL SHEAR WILL BE SOMEWHAT STRONGER.

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BULLETIN - EAS ACTIVATION REQUESTED

SEVERE THUNDERSTORM WARNING

NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC

114 PM EDT SUN AUG 21 2011

THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

SOUTHEASTERN BALTIMORE COUNTY IN NORTHERN MARYLAND...

SOUTHEASTERN HARFORD COUNTY IN NORTHERN MARYLAND...

EASTERN BALTIMORE CITY IN NORTHERN MARYLAND...

* UNTIL 200 PM EDT

* AT 111 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A

SEVERE THUNDERSTORM CAPABLE OF PRODUCING HAIL UP TO THE SIZE OF

QUARTERS AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS

LOCATED NEAR DUNDALK...OR NEAR EASTPOINT...AND MOVING NORTHEAST AT

20 MPH.

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Now a warning on it - go figure

BULLETIN - EAS ACTIVATION REQUESTED

SEVERE THUNDERSTORM WARNING

NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC

112 PM EDT SUN AUG 21 2011

THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

NORTHERN FAUQUIER COUNTY IN NORTHERN VIRGINIA...

WESTERN LOUDOUN COUNTY IN NORTHERN VIRGINIA...

NORTHWESTERN PRINCE WILLIAM COUNTY IN NORTHERN VIRGINIA...

* UNTIL 200 PM EDT

* AT 111 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A

SEVERE THUNDERSTORM CAPABLE OF PRODUCING HAIL UP TO THE SIZE OF

QUARTERS AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS

LOCATED 5 MILES WEST OF ST. LOUIS...AND MOVING EAST AT 15 MPH.

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This storm is intensifying overhead.. rn+ lots of c2g

that cluster that formed this morning over my house and missed BWI only 2 miles to my south expanded and intensified as well; Cecil County had a flood warning because of it

today is just one pot of steaming water that's just starting to boil

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Better quickly throw those cars in the garage! :arrowhead:

SEVERE WEATHER STATEMENT

NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC

116 PM EDT SUN AUG 21 2011

MDC005-025-510-211800-

/O.CON.KLWX.SV.W.0393.000000T0000Z-110821T1800Z/

BALTIMORE MD-HARFORD MD-BALTIMORE CITY MD-

116 PM EDT SUN AUG 21 2011

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 200 PM EDT

FOR THE BALTIMORE CITY...AND HARFORD AND BALTIMORE COUNTIES...

AT 115 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO

INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING HAIL UP TO THE

SIZE OF PING PONG BALLS AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS

STORM WAS LOCATED NEAR TURNERS STATION...MOVING NORTHEAST AT 20 MPH.

LOCATIONS IMPACTED INCLUDE...

BACK RIVER...

ROSEDALE...

MILLERS ISLAND...

ESSEX...

ROSSVILLE...

FULLERTON...

BALTIMORE MARTIN STATE...

BOWLEYS QUARTERS...

NOTTINGHAM...

WHITE MARSH...

MIDDLE RIVER...

WHITE MARSH...

CHASE...

JOPPATOWNE...

BRADSHAW...

UPPER FALLS..

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