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8.13-8.15 rain and storm event


Ian

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Rain events this time of year, are absolutely horrible to predict, especially where the QPF max will be. You lose the baroclinicity and strong advection processes that occur in the winter to throw back QPF, so you're left with the mercy of trying to find where a 30kt LLJ is going to be shoved over a front in the lower levels. Today, it was up in NYC. I didn't really look at what was modeled down here, but it seemed like PHL on northeast into NYC was always ground zero. Models are still struggling up there. They more or less become nowcast events.

This was one of those events where you know a sh*tload will fall...just a matter of where. All you can really do is trying to narrow down there area, and go from there. We also don't have a well developed surface low at this time, but we do have a deepening trough which sometimes acts to keep the tropical plume in place..such as in the NYC area.

Nice post Scott. Thanks.

it is just interesting as how some locals got a few inches of rain and then right downt he road nadda.

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24 hr rainfall amounts

**********************24 hour rainfall**********************

Location 24 hour time/date comments

rainfall of

/inches/ measurement

District of Columbia

... District of Columbia...

5 NW Washington 0.43 815 am 8/14 cocorahs

Maryland

... Anne Arundel County...

1 NNW Eastport 1.39 800 am 8/14 knak

2 E Severn 1.30 700 am 8/14 cocorahs

1 N balt-wash Intl a 0.87 800 am 8/14 ASOS

... Baltimore County...

2 ESE White Marsh 3.92 700 am 8/14 cocorahs

4 N Cockeysville 1.20 900 am 8/14 cocorahs

... Baltimore City...

1 SSE downtown balti 1.43 800 am 8/14 ASOS

... Carroll County...

3 NW Sykesville 0.67 1030 am 8/14 cocorahs

... Charles County...

2 W Waldorf 2.57 635 am 8/14 cocorahs

2 E Waldorf 2.30 700 am 8/14 cocorahs

3 S Waldorf 0.92 800 am 8/14 cocorahs

... Harford County...

4 WNW Havre de Grace 1.14 730 am 8/14 cocorahs

3 NNE Kingsville 0.68 845 am 8/14 cocorahs

... Howard County...

1 se Marriottsville 1.20 800 am 8/14 cocorahs

3 se Sykesville 0.79 640 am 8/14 cocorahs

2 W Columbia 0.78 700 am 8/14 cocorahs

2 N Columbia 0.70 730 am 8/14 cocorahs

... Montgomery County...

1 NNW Takoma Park 0.76 700 am 8/14 cocorahs

... Prince Georges County...

2 se Suitland 1.36 700 am 8/14 cocorahs

1 W Forestville 1.17 700 am 8/14 cocorahs

ESE Camp Springs 1.07 800 am 8/14 cocorahs

2 NNE Bowie 1.03 800 am 8/14 cocorahs

2 se Forest Heights 0.95 730 am 8/14 cocorahs

1 E Morningside 0.89 325 PM 8/14 Andrews AFB

1 W Oxon Hill 0.87 730 am 8/14 cocorahs

2 NNW Camp Springs 0.85 700 am 8/14 cocorahs

... Washington County...

2 ESE Williamsport 0.12 700 am 8/14 cocorahs

3 NNE Smithsburg 0.10 700 am 8/14 cocorahs

Virginia

... Albemarle County...

5 ESE Afton 3.15 746 am 8/14 cocorahs

... Arlington County...

1 S Reagan National 0.43 800 am 8/14 ASOS

... Augusta County...

1 NNW Stuarts Draft 2.46 800 am 8/14 cocorahs

... Culpeper County...

6 N Rixeyville 1.44 700 am 8/14 cocorahs

6 NNE Rixeyville 1.09 700 am 8/14 cocorahs

... Fairfax County...

2 W Fairfax 1.61 600 am 8/14 cocorahs

1 W Vienna 0.87 815 am 8/14 cocorahs

... Greene County...

2 WNW Stanardsville 1.81 600 am 8/14 cocorahs

... Highland County...

1 SW Mustoe 2.12 1159 am 8/13 cocorahs

... Rockingham County...

1 NW Harrisonburg 2.22 700 am 8/14 cocorahs

2 WNW Grottoes 1.35 800 am 8/14 AWOS

... Warren County...

3 NNE Front Royal 0.68 700 am 8/14 cocorahs

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Nice, Ji had/has two of them in his backyard, just gorgeous looking, I didnt have my cam with me though

posting from phone cam ftw. ;)

cell east of me seems to be dying already

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BULLETIN - EAS ACTIVATION REQUESTED

SEVERE THUNDERSTORM WARNING

NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC

744 PM EDT SUN AUG 14 2011

THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

SOUTHERN WASHINGTON COUNTY IN NORTH CENTRAL MARYLAND...

SOUTHWESTERN FREDERICK COUNTY IN NORTH CENTRAL MARYLAND...

NORTHERN LOUDOUN COUNTY IN NORTHERN VIRGINIA...

NORTHEASTERN JEFFERSON COUNTY IN THE PANHANDLE OF WEST VIRGINIA...

* UNTIL 845 PM EDT

* AT 740 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A

SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS

OF 60 MPH. THIS STORM WAS LOCATED NEAR SHEPHERDSTOWN...AND MOVING

SOUTHEAST AT 10 MPH.

* LOCATIONS IMPACTED INCLUDE...

NEERSVILLE...

BRUNSWICK...

POINT OF ROCKS...

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BULLETIN - EAS ACTIVATION REQUESTED

SEVERE THUNDERSTORM WARNING

NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC

744 PM EDT SUN AUG 14 2011

THE NATIONAL WEATHER SERVICE IN STERLING VIRGINIA HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

SOUTHERN WASHINGTON COUNTY IN NORTH CENTRAL MARYLAND...

SOUTHWESTERN FREDERICK COUNTY IN NORTH CENTRAL MARYLAND...

NORTHERN LOUDOUN COUNTY IN NORTHERN VIRGINIA...

NORTHEASTERN JEFFERSON COUNTY IN THE PANHANDLE OF WEST VIRGINIA...

* UNTIL 845 PM EDT

* AT 740 PM EDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A

SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS

OF 60 MPH. THIS STORM WAS LOCATED NEAR SHEPHERDSTOWN...AND MOVING

SOUTHEAST AT 10 MPH.

* LOCATIONS IMPACTED INCLUDE...

NEERSVILLE...

BRUNSWICK...

POINT OF ROCKS...

Northern Loudoun has a magnet, they are always getting the bulk of it. I wonder it is has something to do with the River, i swear, bone dry here still lol

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