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8.13-8.15 rain and storm event


Ian

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You're right. It's not.

Today definitely underproduced here. Always was a threat tho with the precip pattern the models had. Hopefully it's at least a sign it can still try to rain.

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Today definitely underproduced here. Always was a threat tho with the precip pattern the models had. Hopefully it's at least a sign it can still try to rain.

Yeah. I'm guilty of being suckered on this one. The other night when the models (mainly NAM) had copious precip, I kept looking at the sim radar and never did see any widespread areas of precip, just lines. I though, well, the precip forecast must be from storms and that made me feel uneasy then. I brushed it offf, and tried to be confident in rain.

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Yeah. I'm guilty of being suckered on this one. The other night when the models (mainly NAM) had copious precip, I kept looking at the sim radar and never did see any widespread areas of precip, just lines. I though, well, the precip forecast must be from storms and that made me feel uneasy then. I brushed it offf, and tried to be confident in rain.

Part of it is never fully trusting QPF placement especially in convective-driven scenarios. It is still frustrating tho, especially as a pretend forecaster... If nothing else I wonder why we always get suckered in even if there is a pretty solid pattern around here.

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I will say LWX hoisting a flood watch at 4am after the NAM came out was akin or worse than the WSW we got for the Boxing Day storm. Sometimes you gotta wonder at least a little.

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Some towers well to the SW now, can almost see them blooming.

there's at least a hint of a low already transferred toward the coast. im still not sure why there is even much talk of svr etc up this way. there's a decent amount of shear but that doesnt matter much if you're missing other ingredients. atmos still juiced of course but i think anything will tend to be pulsers and we're heading out of peak heating soon.

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MESOSCALE DISCUSSION 1977

NWS STORM PREDICTION CENTER NORMAN OK

0247 PM CDT SUN AUG 14 2011

AREAS AFFECTED...NRN VA...ERN WV PANHANDLE... AND NWRN MD INCLUDING

PARTS OF MD PANHANDLE

CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE

VALID 141947Z - 142045Z

A SVR TSTM WATCH MAY BE NEEDED FOR THE LATE AFTERNOON/EARLY EVENING

TO THE NORTH OF WW 779 ACROSS PART OF NRN VA...ERN WV PANHANDLE...

AND NWRN MD INCLUDING PART OF THE MD PANHANDLE.

AT 1930Z...REGIONAL RADAR IMAGERY SHOWED A BROKEN LINE/CLUSTER OF

STORMS MOVING EWD THROUGH CENTRAL/ERN WV...AND ADDITIONAL STORMS

DEVELOPING WITHIN THE HIGHER TERRAIN OF FAR WRN VA TO SOUTH CENTRAL

AND CENTRAL PA. DESPITE GENERALLY WEAK MIDLEVEL LAPSE RATES...A

CORRIDOR OF STEEP LOW LEVEL LAPSE RATES /SFC-3 KM OF 7.5-8.5 C PER

KM/ AND MODERATE INSTABILITY ALONG AND IN LEE OF THE APPALACHIANS

ACROSS THE DISCUSSION AREA ARE SUPPORTING THIS CONVECTION. AN

INCREASE IN SWLY MIDLEVEL WINDS /40-45 KT/ PER WSR-88D VAD AT

STERLING VA IS RESULTING IN EFFECTIVE BULK SHEAR OF 30-40 KT FROM

NRN VA TO SRN PA SUGGESTING A GREATER POTENTIAL FOR STORMS TO

ORGANIZE AS THEY DEVELOP AND OR MOVE IN LEE OF THE HIGHER TERRAIN.

DEEP LAYER ASCENT ATTENDANT TO A MIDLEVEL IMPULSE LOCATED OVER

CENTRAL PA...AND CORRIDOR OF ASCENT EXTENDING FROM WV TO NERN TN

ATTENDANT TO THE UPPER OH VALLEY SHORTWAVE TROUGH WILL EACH SUPPORT

ADDITIONAL CONVECTIVE DEVELOPMENT IN THE SHORT TERM.

..PETERS.. 08/14/2011

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Part of it is never fully trusting QPF placement especially in convective-driven scenarios. It is still frustrating tho, especially as a pretend forecaster... If nothing else I wonder why we always get suckered in even if there is a pretty solid pattern around here.

We really need a full-out dynamically-organized system in order to get the widespread high QPFs around here it seems... the UL vort disorganization, weak LL winds and meh ML lapse rates definitely need better synoptic support to get us organized storms.

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We really need a full-out dynamically-organized system in order to get the widespread high QPFs around here it seems... the UL vort disorganization, weak LL winds and meh ML lapse rates definitely need better synoptic support to get us organized storms.

Yeah, that's probably true. The northern stream is almost always a problem around here as well. Still more interesting weather than we've had in a while I guess, and it's not yet over so can't fully judge (at least sans the time constraint forecasts).

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Yeah, that's probably true. The northern stream is almost always a problem around here as well. Still more interesting weather than we've had in a while I guess, and it's not yet over so can't fully judge (at least sans the time constraint forecasts).

Always a valid point.

I have been watching the few showers in and around the beltway... hoping some bigger stuff gets going in the next hour or two.

20z SPC update translated the 30% wind probs further west over the mountains and took it out in the eastern areas... still looking like a bullish forecast overall.

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MESOSCALE DISCUSSION 1977

NWS STORM PREDICTION CENTER NORMAN OK

0247 PM CDT SUN AUG 14 2011

AREAS AFFECTED...NRN VA...ERN WV PANHANDLE... AND NWRN MD INCLUDING

PARTS OF MD PANHANDLE

CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE

VALID 141947Z - 142045Z

A SVR TSTM WATCH MAY BE NEEDED FOR THE LATE AFTERNOON/EARLY EVENING

TO THE NORTH OF WW 779 ACROSS PART OF NRN VA...ERN WV PANHANDLE...

AND NWRN MD INCLUDING PART OF THE MD PANHANDLE.

AT 1930Z...REGIONAL RADAR IMAGERY SHOWED A BROKEN LINE/CLUSTER OF

STORMS MOVING EWD THROUGH CENTRAL/ERN WV...AND ADDITIONAL STORMS

DEVELOPING WITHIN THE HIGHER TERRAIN OF FAR WRN VA TO SOUTH CENTRAL

AND CENTRAL PA. DESPITE GENERALLY WEAK MIDLEVEL LAPSE RATES...A

CORRIDOR OF STEEP LOW LEVEL LAPSE RATES /SFC-3 KM OF 7.5-8.5 C PER

KM/ AND MODERATE INSTABILITY ALONG AND IN LEE OF THE APPALACHIANS

ACROSS THE DISCUSSION AREA ARE SUPPORTING THIS CONVECTION. AN

INCREASE IN SWLY MIDLEVEL WINDS /40-45 KT/ PER WSR-88D VAD AT

STERLING VA IS RESULTING IN EFFECTIVE BULK SHEAR OF 30-40 KT FROM

NRN VA TO SRN PA SUGGESTING A GREATER POTENTIAL FOR STORMS TO

ORGANIZE AS THEY DEVELOP AND OR MOVE IN LEE OF THE HIGHER TERRAIN.

DEEP LAYER ASCENT ATTENDANT TO A MIDLEVEL IMPULSE LOCATED OVER

CENTRAL PA...AND CORRIDOR OF ASCENT EXTENDING FROM WV TO NERN TN

ATTENDANT TO THE UPPER OH VALLEY SHORTWAVE TROUGH WILL EACH SUPPORT

ADDITIONAL CONVECTIVE DEVELOPMENT IN THE SHORT TERM.

..PETERS.. 08/14/2011

Hummm my neck of the woods... :whistle:

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Always a valid point.

I have been watching the few showers in and around the beltway... hoping some bigger stuff gets going in the next hour or two.

20z SPC update translated the 30% wind probs further west over the mountains and took it out in the eastern areas... still looking like a bullish forecast overall.

radar looks ok for more rain at least but the shadow livith on the 18z nam

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