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July 1-8, 2012 Heat & Storms


Herb@MAWS

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The dew pt at DCA is 55 on a NW wind. Best of luck getting much with that.

Now it's at 53. Mine, and surrounding areas is still in the mid 60's. Feels horrible to me. Areas to the west and south of DC are still quite moist, in the mid 60's to around 70 further south toward Fredericksburg. We got about .08 with that shower that came thru around 5am. Other than that, nothing since 6/29's .20.

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Now it's at 53. Mine, and surrounding areas is still in the mid 60's. Feels horrible to me. Areas to the west and south of DC are still quite moist, in the mid 60's to around 70 further south toward Fredericksburg. We got about .08 with that shower that came thru around 5am. Other than that, nothing since 6/29's .20.

we could see some storms but we've mixed out across the dc/balt area which is pretty common here. we don't have much if any of that EML influence we had last week right now at least. cape is actually pretty low across this part of the area at this point.

post-1615-0-70287600-1341348773_thumb.gi

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Skies starting to get that dark gray look up here.

We need the rain but storms out of the NW never fare well for FDK. The heavier stuff will go through Thurmont into Carroll and Baltimore Counties. We'll end up with a 2 min light shower. Ok, this is true in about 85% of cases. :)

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mcd1376.gif

MESOSCALE DISCUSSION 1376

NWS STORM PREDICTION CENTER NORMAN OK

0458 PM CDT TUE JUL 03 2012

AREAS AFFECTED...CNTRL/SERN OH...MUCH OF WV...WRN VA...PARTS OF

WRN/CNTRL MD...S-CNTRL PA

CONCERNING...SEVERE POTENTIAL...WATCH UNLIKELY

VALID 032158Z - 040030Z

PROBABILITY OF WATCH ISSUANCE...20 PERCENT

SUMMARY...ISOLATED MARGINALLY SVR THUNDERSTORMS WILL BE POSSIBLE

THROUGH EARLY EVENING ACROSS PARTS OF THE OH VALLEY TO THE MID

ATLANTIC. ANY SVR THREAT SHOULD REMAIN LARGELY

MARGINAL/BRIEF/SPORADIC...AND...AS SUCH...A WW IS NOT NEEDED.

DISCUSSION...SFC MESOANALYSIS PLACES AN ARCING...COMPOSITE OUTFLOW

BOUNDARY/DIFFERENTIAL HEATING ZONE OWING TO EARLIER CONVECTION AND

DEBRIS CLOUDINESS/SHOWERS EXTENDING FROM S-CNTRL UPSTATE NY THROUGH

CNTRL PA TO SOUTH OF MORGANTOWN WV AND FARTHER NW TO JUST EAST OF

COLUMBUS OH TO TOLEDO OH. A SFC MESOHIGH DRIVEN BY DIABATIC COOLING

PROCESSES IS LOCATED NW OF THIS BOUNDARY IN WRN PA. LOW-LEVEL ASCENT

ALONG THIS BOUNDARY AUGMENTED BY CROSS-BOUNDARY

DIFFERENTIAL-HEATING-INDUCED BAROCLINICITY CONTINUES TO SUPPORT

ISOLATED TO WIDELY SCATTERED CONVECTIVE INITIATION. WITH 10-15 KT OF

WLY TO NWLY FLOW BELOW 6 KM AGL PER REGIONAL VWP

DATA...EWD/SEWD-MOVING COLD POOLS WILL FOSTER ADDITIONAL CONVECTIVE

REGENERATION/PROPAGATION AMIDST 1000-2000 J/KG OF MLCAPE WITHIN A

ZONE OF ENHANCED SFC THETA-E SOUTH OF THE BOUNDARY.

THE AFOREMENTIONED DEGREE OF BUOYANCY WILL SUPPORT A THREAT FOR

VIGOROUS UPDRAFTS AND MARGINALLY SVR HAIL POSSIBLE WITH THE

STRONGEST CORES. AMPLE DCAPE -- IN EXCESS OF 800 J/KG IN MANY

INSTANCES AND IN EXCESS OF 1100 J/KG IN OHIO -- WILL SUPPORT A

MARGINALLY SVR WIND THREAT. WHILE A BROAD AREA OF ISOLATED STRONG TO

PERHAPS MARGINALLY SVR STORM THREAT WILL EXIST FROM THE BLUE RIDGE

WWD ACROSS WV...THE THREAT AREA NARROWS INTO CNTRL OH OWING TO A DRY

SLOT PER WATER VAPOR IMAGERY THAT EXTENDS FROM CNTRL IND INTO

W-CNTRL OH. THIS IS PROMOTING BOUNDARY-LAYER DRYING VIA VERTICAL

MIXING AND CAPE REDUCTION ACROSS W-CNTRL OH. WEAK DEEP SHEAR AND THE

EVENTUAL ONSET OF NOCTURNAL COOLING SHOULD KEEP ANY SVR THREAT BRIEF

IN DURATION AND SPARSE IN COVERAGE.

..COHEN/HART.. 07/03/2012

ATTN...WFO...AKQ...CTP...LWX...RNK...PBZ...RLX...CLE...ILN...

LAT...LON 40248298 40648273 40418197 39898118 39527999 39517911

39757819 39987731 39317721 38167788 37517888 37498009

37798123 38378218 39018265 39718291 40248298

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Warning just went up for Frederick Co. I am just outside the western edge of the warning box.

The National Weather Service in Sterling Virginia has issued a

* Severe Thunderstorm Warning for...

northern Frederick County in north central Maryland...

Washington County in north central Maryland...

* until 645 PM EDT

* at 605 PM EDT...severe thunderstorms were detected along a line

extending from 11 miles north of Long Meadow to Sleepy Creek...and

were moving southeast at 35 mph. This line of storms is capable of

producing hail up to the size of quarters and damaging winds in

excess of 60 mph.

* Locations impacted include...

Long Meadow...

Municipal Stadium...

Williamsport...

Hagerstown...

Emmitsburg...

Boonsboro...

Wolfsville...

Thurmont...

This is a dangerous line of storms. If you are in its path...move

indoors to a sturdy building and stay away from windows. When it is

safe to do so...report severe weather to local law enforcement or to

the National Weather Service.

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They're running into a less favorable environment headed into dc/balt corridor but they might hold together. Gust front opp? Maybe too dark (as usual here).

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Ok I was going to post that this storm was not doing much of anything... but about a minute ago while we were eating dinner at the table I saw a lightning bolt about 200 yards out from the back of the house strike the corn field. The thunder from it shook the house! We all jumped out of our chairs. I have never had it that close before.

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Ok I was going to post that this storm was not doing much of anything... but about a minute ago while we were eating dinner at the table I saw a lightning bolt about 200 yards out from the back of the house strike the corn field. The thunder from it shook the house! We all jumped out of our chairs. I have never had it that close before.

That woulda been one of my best ever lightning shots if that ever happened to me, getting that close on the video.

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