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Soaking Rains


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Yesterday was a classic example of what happens when a lee trough is stalled east of the Apps. Today it looks like its shifted just a little more south but still overall a distinct lee trough, so probably nearly the same results occur again by afternoon to evening. Usually this is how the piedmont (esp in NC) gets their flash flooding. Cells grow and grow until they merge and what's left is a huge mass of heavy rain over multiple counties that rains til well after dark, sometimes til midnight. It's always really hard to pinpoint which areas get that though (usually its northwest north or central NC). Anyway, I see two major areas today for severe and heavy rains: coastal Carolinas down to north Florida, and 2) vicinity of lee trough from eastern Alabama through central north GA to much of Carolinas and south VA.

GFS actually keeps bagginess or troughiness through almost 10 days, and re-exerts an upper low somewhere near the Gulf this Weekend, and might pull up truly tropical moisture next week for Florida . If theres's still a broad upper low in Alabama or Tenn Valley down to Gulf Coast by then, once again there could be a repeat of what yesterday and today brings. IE, more rain. The westerlies lift pretty far north, and thats a sign in May that something can gain cyclonic curvature in the Deep South. Currently there's atleast 2 weak upper lows, and in Spring, all you need is one weak upper low to get the daily storms going. This could turn out to be a very wet month in some areas, even areas that so far have missed it CAE AHN, it could really turn around in a 5H pattern like this, and the one shown by GFS for a while. Almost every thing is located nicely to have atleast normal rains (and honestly well above normal for most). Bermuda high, ridging to our north, weak upper low between Texas to Alabama. All ingredients that in the past have made us pretty wet. June 2005 comes to mind.

post-38-0-39226200-1337105817_thumb.jpg

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Storms look more discrete from Columbia, SC to Greenville,SC. IMO, I think it will be easy to get some warnings west of Charlotte too.

There's also activity breaking out over the mountains from north-east Georgia to south-west VA. Looks more linear there.

I believe if we get some more sunshine to breakout over the foothills...then we are in for a repeat for the foothills and western Piedmont. Still looking soupy/cloudy here in Wilkes though.

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Still waiting on any significant rain, though, got a 'trace" over night, watching the lightshow across the river, down towards Oak island..

sea breeze has fired up Inland, As I can hear thunder off in the distance...

Warm SOUPY atmosphere, Lower 80's, Winds from the south around 15...

hoping for RAIN, Today!

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Storms look more discrete from Columbia, SC to Greenville,SC. IMO,I think it will be easy to get some warnings west of Charlotte too.

There's also activity breaking out over the mountains from north-east Georgia to south-west VA. Looks more linear there.

I believe if we get some more sunshine to breakout over the foothills...then we are in for a repeat for the foothills and western Piedmont. Still looking soupy/cloudy here in Wilkes though.

I am at work here in South Clt (Pineville), has been sunny here for a while and the temp is going up.

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Really surprised by the lack of people on the board lately. I know it's not a huge tornado outbreak, but at least there has been something to follow the last couple of days. Maybe folks were spoiled with all the tornado outbreaks last year.

IMHO this place hasn't been the same because of the virtual non-winter we had.

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mcd0816.gif

MESOSCALE DISCUSSION 0816

NWS STORM PREDICTION CENTER NORMAN OK

0108 PM CDT TUE MAY 15 2012

AREAS AFFECTED...WRN NC / WRN-CNTRL-NRN VA / PARTS OF MD

CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE

VALID 151808Z - 151915Z

PROBABILITY OF WATCH ISSUANCE...60 PERCENT

SUMMARY...SCTD TSTMS ARE EXPECTED TO DEVELOP 18-21Z. THE STRONGER

STORMS WILL POSE AN ISOLD DMGG WIND/LARGE HAIL RISK.

DISCUSSION...SURFACE MESOANALYSIS PLACES A WEAK SURFACE TROUGH

EXTENDING NEWD FROM THE LEE OF THE SRN APPALACHIANS NEWD INTO WRN

VA. THE INFLUENCE OF WEAK SHORTWAVE RIDGING ALOFT WILL ABATE THIS

AFTERNOON AS A WEAK SHORTWAVE TROUGH OVER THE TN VALLEY MOVES NEWD

WITHIN A BROAD CYCLONIC FLOW REGIME CENTERED FARTHER W OVER THE

LOWER MS RIVER VALLEY. ALTHOUGH MID-LEVEL LAPSE RATES ARE NOT

PARTICULARLY STEEP /6.5 DEG C PER KM --REF 12Z GSO RAOB/...FURTHER

HEATING WILL ALLOW TEMPS TO CONTINUE TO WARM THROUGH THE 70S AND

INTO THE 80S AND LEAD TO MLCAPE ON THE ORDER OF 1000-1500 J/KG. AS

SUCH...POCKETS OF SUNSHINE WILL INCREASE 0-2 KM LAPSE RATES AND

BECOME MORE CONDUCIVE FOR INTERMITTENT BOUTS OF STRONGER DOWNDRAFT

PENETRATION IN THE FORM OF LOCALIZED STRONG/MARGINALLY SEVERE WIND

GUSTS.

THE LAST FEW RUNS OF THE HRRR AND OTHER CONVECTION-ALLOWING MODEL

GUIDANCE SHOW SCTD STORMS DEVELOPING IN THE 18-21Z

PERIOD...CONCENTRATED INVOF THE MTNS OVER WRN NC NEWD INTO THE VA

PIEDMONT. THE MULTICELLULAR CHARACTER OF THESE STORMS SUGGEST AT

LEAST SOME LARGE HAIL RISK WILL DEVELOP WITH THE STRONGER

UPDRAFTS...BEFORE APPRECIABLE CONVECTIVE OVERTURNING/LOSS OF HEATING

TOWARDS EVENING LESSENS THIS RISK.

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230 PM EDT Tue may 15 2012

The National Weather Service has issued Severe Thunderstorm Watch

278 in effect until 9 PM EDT this evening for the following areas

In North Carolina this watch includes 6 counties

In southeast North Carolina

Bladen Brunswick Columbus

New Hanover Pender Robeson

In South Carolina this watch includes 8 counties

In northeast South Carolina

Darlington Dillon Florence

Georgetown Horry Marion

Marlboro Williamsburg

This includes the cities of...Bennettsville...Burgaw...Conway...

Darlington...Dillon...Elizabethtown...Florence...Georgetown...

Kingstree...Leland...Lumberton...Marion...Myrtle Beach...

Shallotte...Surf City...Whiteville...

Wilmington and Wrightsville Beach.

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New severe t-storm watch. Most of NC is under a watch now.

313 PM EDT Tue may 15 2012

The National Weather Service has issued Severe Thunderstorm Watch

279 in effect until 10 PM EDT this evening for the following

areas

In North Carolina this watch includes 31 counties

In central North Carolina

Alamance Anson Chatham

Cumberland Davidson Durham

Edgecombe Forsyth Franklin

Granville Guilford Halifax

Harnett Hoke Johnston

Lee Montgomery Moore

Nash Orange person

Randolph Richmond Sampson

Scotland Stanly Vance

wake Warren Wayne

Wilson

This includes the cities of...Albemarle...Asheboro...Burlington...

Chapel HIll...Clinton...Durham...Fayetteville...Goldsboro...

Greensboro...Henderson...High Point...Laurinburg...Lexington...

Lillington...Louisburg...Nashville...Oxford...Pittsboro...

Raeford...Raleigh...Roanoke Rapids...Rockingham...Rocky Mount...

Roxboro...Sanford...Smithfield...Southern Pines...Troy...

Wadesboro...Warrenton...Wilson and Winston-Salem.

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Yesterday was a classic example of what happens when a lee trough is stalled east of the Apps. Today it looks like its shifted just a little more south but still overall a distinct lee trough, so probably nearly the same results occur again by afternoon to evening. Usually this is how the piedmont (esp in NC) gets their flash flooding. Cells grow and grow until they merge and what's left is a huge mass of heavy rain over multiple counties that rains til well after dark, sometimes til midnight. It's always really hard to pinpoint which areas get that though (usually its northwest north or central NC). Anyway, I see two major areas today for severe and heavy rains: coastal Carolinas down to north Florida, and 2) vicinity of lee trough from eastern Alabama through central north GA to much of Carolinas and south VA.

GFS actually keeps bagginess or troughiness through almost 10 days, and re-exerts an upper low somewhere near the Gulf this Weekend, and might pull up truly tropical moisture next week for Florida . If theres's still a broad upper low in Alabama or Tenn Valley down to Gulf Coast by then, once again there could be a repeat of what yesterday and today brings. IE, more rain. The westerlies lift pretty far north, and thats a sign in May that something can gain cyclonic curvature in the Deep South. Currently there's atleast 2 weak upper lows, and in Spring, all you need is one weak upper low to get the daily storms going. This could turn out to be a very wet month in some areas, even areas that so far have missed it CAE AHN, it could really turn around in a 5H pattern like this, and the one shown by GFS for a while. Almost every thing is located nicely to have atleast normal rains (and honestly well above normal for most). Bermuda high, ridging to our north, weak upper low between Texas to Alabama. All ingredients that in the past have made us pretty wet. June 2005 comes to mind.

CAE has picked up a much needed .40 for the past two days, *fingers crossed* another round finds it's way to mby :lol:

Hopefully those same ingredients are in the right spot later this summer to steer a sweet tropical system this way to help with these negative departures :wub:

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444 PM EDT Tue may 15 2012

The National Weather Service in Raleigh has issued a

* Severe Thunderstorm Warning for...

southeastern Johnston County in central North Carolina

northwestern Wayne County in central North Carolina

* until 530 PM EDT

* at 441 PM EDT...National Weather Service Doppler radar indicated a

severe thunderstorm 8 miles northwest of Grantham...or 11 miles

south of Smithfield...moving north at 5 mph. Quarter sized hail and

winds in excess of 58 mph are likely with this storm.

* Locations impacted include...

Smithfield...Pine Level...

This includes Interstate 95 between exits 90 and 106.

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