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July 1-8, 2012 Heat & Storms


Herb@MAWS

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BULLETIN - EAS ACTIVATION REQUESTED

SEVERE THUNDERSTORM WARNING

NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC

853 PM EDT WED JUL 4 2012

THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

CENTRAL WASHINGTON COUNTY IN NORTH CENTRAL MARYLAND...

NORTHEASTERN WARREN COUNTY IN NORTHWEST VIRGINIA...

CITY OF WINCHESTER IN NORTHWEST VIRGINIA...

FREDERICK COUNTY IN NORTHWEST VIRGINIA...

CLARKE COUNTY IN NORTHWEST VIRGINIA...

EASTERN MORGAN COUNTY IN THE PANHANDLE OF WEST VIRGINIA...

JEFFERSON COUNTY IN THE PANHANDLE OF WEST VIRGINIA...

EASTERN HAMPSHIRE COUNTY IN EASTERN WEST VIRGINIA...

BERKELEY COUNTY IN THE PANHANDLE OF WEST VIRGINIA...

* UNTIL 945 PM EDT

* AT 851 PM EDT...SEVERE THUNDERSTORMS WERE DETECTED ALONG A LINE

EXTENDING FROM SPRUCE PINE HOLLOW TO VALLEY HIGH TO 7 MILES

SOUTHWEST OF TIMBER RIDGE...AND WERE MOVING SOUTHEAST AT 35 MPH.

THIS LINE OF STORMS IS CAPABLE OF PRODUCING HAIL UP TO THE SIZE OF

QUARTERS AND DESTRUCTIVE WINDS IN EXCESS OF 70 MPH.

* LOCATIONS IMPACTED INCLUDE...

MARTINSBURG...

INWOOD...

MILLWOOD PIKE...

STEPHENS CITY...

GREENWOOD...

SHEPHERDSTOWN...

BERRYVILLE...

RANSON...

CHARLES TOWN...

FRONT ROYAL...

DAMAGING WIND GUSTS WITH THIS LINE OF STORMS WILL OCCUR FAR AHEAD OF

ANY RAIN OR LIGHTNING. DO NOT WAIT FOR THE SOUND OF THUNDER BEFORE

TAKING SHELTER. MOVE INDOORS TO A STURDY BUILDING AND STAY AWAY FROM

WINDOWS.

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From the 900 LWX AFD Disco

00Z LWX RAOB DEPICT PLENTY OF INSTBY...CAPES ARND 3600 J/KG.

THUS...STORMS ABLE TO WITHSTAND CROSSING THE APPALACHIANS...AND

SHUD NOW MAINTAIN INTENSITY. WL HV ACTIVITY MAKE IT TO METRO

DC...BUT NOT LKLY TIL AFTER 10 PM. HV ADJUSTED POPS IN LINE WITH

THESE GOING TRENDS. NOT CERTAIN IF THESE STORMS WL BE SEVERE WHEN

IT REACHES THE DISTRICT...BUT AT THE VERY LEAST WL HV A LTNG

THREAT.

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BULLETIN - EAS ACTIVATION REQUESTED

SEVERE THUNDERSTORM WARNING

NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC

934 PM EDT WED JUL 4 2012

THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

NORTHEASTERN RAPPAHANNOCK COUNTY IN NORTHWEST VIRGINIA...

EASTERN WARREN COUNTY IN NORTHWEST VIRGINIA...

NORTHERN CULPEPER COUNTY IN NORTHERN VIRGINIA...

SOUTHERN CLARKE COUNTY IN NORTHWEST VIRGINIA...

NORTHWESTERN PRINCE WILLIAM COUNTY IN NORTHERN VIRGINIA...

WESTERN LOUDOUN COUNTY IN NORTHERN VIRGINIA...

NORTHERN FAUQUIER COUNTY IN NORTHERN VIRGINIA...

* UNTIL 1015 PM EDT

* AT 932 PM EDT...SEVERE THUNDERSTORMS WERE DETECTED ALONG A LINE

EXTENDING FROM 15 MILES NORTHEAST OF FRONT ROYAL TO DELAPLANE TO

FRONT ROYAL...AND WERE MOVING SOUTHEAST AT 30 MPH. THIS LINE OF

STORMS IS CAPABLE OF PRODUCING HAIL UP TO THE SIZE OF PING PONG

BALLS AND DAMAGING WINDS IN EXCESS OF 60 MPH.

* LOCATIONS IMPACTED INCLUDE...

FRONT ROYAL...

DELAPLANE...

HUME...

THE PLAINS...

WARRENTON...

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A Complex is diving SE out of Ohio with several warnings. Maybe it will stay together in this juicy atmosphere tonight.

Back here in the Pittsburgh area this week and just got hit with a warned cell. Once we got the purple returns, half inch hail started falling. Good winds and absolutely torrential rains. So nice not to see storms fizzle as they approach you. Frederick weather is just awful and boring! But I'll take my .07" of rain today I guess. Lol. Does seem like the energy off their line is transferring east some so maybe western areas of LWX might get in on some action later.

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I was a bit late getting set up (left the tripod head in my apartment...d'oh), but I did grab a few so-so photos of lightning from tonight's storms, since they missed just to my south.

Great shots and thanks for sharing. Always wanted to get lightning photos...do you just take continuous photos hoping to capture some or is there another secret?

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During 1980, 1991, and 1997, DC reached 95 on seven straight days, but in no prior year has it reached 95 on eight straight days. So, tomorrow should set a new record for consecutive 95+ days. However, setting 95 as the threshold for extreme heat is somewhat arbitrary. Highs during the last seven days (June 28-July 4) have averaged 98.3, whereas in 1930 there was a streak of 10 days (July 18-27) that reached at least 93, with an average high of 99.5 (six of those days reached at least 100).

I had 3 yrs with 8 in chart in 95+ thread. I have spreadsheet on another computer but I see eight in 2002 (8/12-8/19)?

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SPC likes us Days 3 and 4:

day3prob_20120705_0730_prt.gif

...OH VALLEY THROUGH NERN STATES...

ELEVATED CONVECTION MAY BE ONGOING EARLY SATURDAY IN VICINITY OF

BAROCLINIC ZONE FROM A PORTION OF NY INTO NEW ENGLAND. DIABATIC

WARMING SOUTH OF THIS ACTIVITY WILL DESTABILIZE THE BOUNDARY LAYER

AND CONTRIBUTE TO 1000-1500 J/KG CAPE DURING THE AFTERNOON.

POTENTIAL WILL EXIST FOR STORMS TO DEVELOP ALONG AND AHEAD OF SWD

ADVANCING FRONT. STRENGTHENING MID-UPPER FLOW ASSOCIATED WITH SEWD

MOVING SHORTWAVE TROUGH WILL RESULT IN 30-40 KT EFFECTIVE SHEAR

ALONG NRN EDGE OF WARM SECTOR. FAST MOVING STORMS CAPABLE OF

ISOLATED DAMAGING WIND AND POSSIBLY SOME HAIL WILL BE THE MAIN

THREAT.

post-96-0-99512700-1341489572_thumb.gif

COLD FRONT WILL SETTLE SWD

THROUGH THE MID ATLANTIC AND OH VALLEY DAY 4 /SUNDAY/. A MOIST

BOUNDARY LAYER WILL EXIST SOUTH OF THIS BOUNDARY AND BELT OF

MODERATE WLY TO WNWLY FLOW ALOFT MAY OVERLAP NRN FRINGE OF WARM

SECTOR. SCATTERED STORMS WILL PROBABLY DEVELOP ALONG AND SOUTH OF

THE FRONT DURING THE DAY AND MAY BECOME CAPABLE OF PRODUCING

ISOLATED DAMAGING WIND.

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I don't understand these great radar echoes. These storms lately are all wind and very little rain.

Noted the same thing. We've had 3 warned storms and one more t-storm since Friday and I've received a grand total of .37" rain. Each of these storms has been all wind and lightning, and I would say are the 3 most intense lightning storms in my memory. Last night took the top spot; I've never even come close to seeing that much cloud-to-ground strikes. I wish I'd videoed. A house a block down the street from mine apparently was hit as multiple fire-trucks were on scene for more than an hour. There was an almost constant wail of sirens as trucks were running up and down Rt 11 responding to - what I assume were - other lightining-caused structure fires. Wild night.

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