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July 1-8, 2012 Heat & Storms


Herb@MAWS

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Question for you severe guys. My knowledge is pretty weak but I'm slowly catching on. I was wondering about organized convection in our area and where it initiates. Do we ever get medium to large sized convective systems that originate east of the apps or do all the bigger ones start in the oh valley / midwest first?

Also, unless my memory is getting crappy (and it might be), why does is seem that we get fewer squall lines than we used to? My memory of the 80's seems to remember that it was common to get large lines of storms (stretching from s pa all the way to central va?). Not front related stuff either. Just hot afternoon events. Now it seems like random popcorn seems more common. It might have always been this way. I'm not sure.

I'm not sure how to quantify it but I think the majority of our storms come from the pre-frontal/leeside trough. Though as far as our big MCS+, they probably more often come from west/northwest of the Apps as stuff on the trough doesn't often have enough time to form up in a huge way for most of us. Every now and then we'll get a good line out of the SW too.

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I'm not sure how to quantify it but I think the majority of our storms come from the pre-frontal/leeside trough. Though as far as our big MCS+, they probably more often come from west/northwest of the Apps as stuff on the trough doesn't often have enough time to form up in a huge way for most of us. Every now and then we'll get a good line out of the SW too.

For the most part, I would quantify a med-large event as one where over 80% of the area is affected. Not just hit and miss blobs.

I know there are a zillion variables though so it's really tough to answer my question without having really go into detail.

I grew up boating on the Chesapeake almost every weekend from May-Nov. We got caught in alot of tough weather. Many of the lines that came through affected the entire bay. Narrow but long lines of storms. Plenty of wind with them. For the most part, they looked the same while approaching. Really dark line in front with orange or green sky behind. I just don't see that very often anymore. I could be totally off base but it seems like it was more common than it is now. Just like overrunning snow...lol

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For the most part, I would quantify a med-large event as one where over 80% of the area is affected. Not just hit and miss blobs.

I know there are a zillion variables though so it's really tough to answer my question without having really go into detail.

I grew up boating on the Chesapeake almost every weekend from May-Nov. We got caught in alot of tough weather. Many of the lines that came through affected the entire bay. Narrow but long lines of storms. Plenty of wind with them. For the most part, they looked the same while approaching. Really dark line in front with orange or green sky behind. I just don't see that very often anymore. I could be totally off base but it seems like it was more common than it is now. Just like overrunning snow...lol

Maybe somebody can explain the meteorology of it, but I don't remember us getting too many areas of rain and storms like the blob that moved through WV and swVA today. Not only slow moving but also solid, large area of heavy rain.

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Maybe somebody can explain the meteorology of it, but I don't remember us getting too many areas of rain and storms like the blob that moved through WV and swVA today. Not only slow moving but also solid, large area of heavy rain.

this has been a really stormy week or so for good chunks of the eastern half of the country.. almost exceptionally so. swva in particular seems to get hit every day lately.

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this has been a really stormy week or so for good chunks of the eastern half of the country.. almost exceptionally so. swva in particular seems to get hit every day lately.

Seems as if ours are always a line of storms that is gone in twenty minutes or scattered that are hit or miss. I'd love to see us in such a widespread area of heavy rain. Seems those areas where in heavy rain for hours.

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Ouch time

URGENT - WEATHER MESSAGE

NATIONAL WEATHER SERVICE BALTIMORE MD/WASHINGTON DC

920 PM EDT THU JUL 5 2012

DCZ001-MDZ004>007-009>011-013-014-016>018-VAZ036>040-042-050>057-

501-502-060930-

/O.NEW.KLWX.EH.A.0003.120707T1600Z-120708T0200Z/

DISTRICT OF COLUMBIA-FREDERICK MD-CARROLL-NORTHERN BALTIMORE-

HARFORD-MONTGOMERY-HOWARD-SOUTHERN BALTIMORE-PRINCE GEORGES-

ANNE ARUNDEL-CHARLES-ST. MARYS-CALVERT-NELSON-ALBEMARLE-GREENE-

MADISON-RAPPAHANNOCK-LOUDOUN-ORANGE-CULPEPER-

PRINCE WILLIAM/MANASSAS/MANASSAS PARK-FAIRFAX-

ARLINGTON/FALLS CHURCH/ALEXANDRIA-STAFFORD-SPOTSYLVANIA-

KING GEORGE-NORTHERN FAUQUIER-SOUTHERN FAUQUIER-

INCLUDING THE CITIES OF...WASHINGTON...FREDERICK...WESTMINSTER...

GAITHERSBURG...COLUMBIA...BALTIMORE...ANNAPOLIS...WALDORF...

ST MARYS CITY...CHARLOTTESVILLE...LEESBURG...CULPEPER...

MANASSAS...MANASSAS PARK...FAIRFAX...ALEXANDRIA...FALLS CHURCH...

FREDERICKSBURG...WARRENTON

920 PM EDT THU JUL 5 2012

...EXCESSIVE HEAT WATCH IN EFFECT FROM SATURDAY AFTERNOON THROUGH

SATURDAY EVENING...

THE NATIONAL WEATHER SERVICE IN BALTIMORE MD/WASHINGTON HAS

ISSUED AN EXCESSIVE HEAT WATCH...WHICH IS IN EFFECT FROM SATURDAY

AFTERNOON THROUGH SATURDAY EVENING.

* HEAT INDEX VALUES...BETWEEN 110 AND 115 DUE TO TEMPERATURES NEAR

100 AND DEWPOINTS IN THE LOWER 70S.

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