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wind and rain threat 10/7


forkyfork

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I remember a similar event around this time last year. During the afternoon the winds were crazy, low clouds racing across the sky. We were under a tornado watch but the thin squall line moved through with a quick downpour and unimpressive winds.

This is a completely different setup. We didn't have such a strong LLJ to work with and the timing was different.

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60% chance for another watch for LI and New England soon:

MESOSCALE DISCUSSION 1955   NWS STORM PREDICTION CENTER NORMAN OK   0126 PM CDT MON OCT 07 2013   AREAS AFFECTED...PORTIONS OF LONG ISLAND NWD ACROSS PARTS OF NEW   ENGLAND   CONCERNING...SEVERE POTENTIAL...WATCH POSSIBLE    VALID 071826Z - 072030Z   PROBABILITY OF WATCH ISSUANCE...60 PERCENT   SUMMARY...THE POTENTIAL FOR DMGG WINDS ACROSS UPSTREAM TORNADO WATCH   543 MAY BEGIN TO SHIFT E OF THE WW AROUND 2000 UTC...AND THIS MAY   WARRANT DOWNSTREAM WW ISSUANCE.   DISCUSSION...AN ONGOING EXTENSIVE SQUALL LINE WITH EMBEDDED LEWP   STRUCTURES IS MOVING EWD AROUND 25-30 KT FROM ERN NY TO THE MID   ATLANTIC...AND CURRENT EXTRAPOLATION TAKES THE LINE E OF UPSTREAM   TORNADO WATCH AROUND OR SHORTLY AFTER 2000 UTC. BUOYANCY ACROSS THE   MCD AREA WILL REMAIN MARGINAL -- SBCAPE AOB 500 J/KG -- WITH   WIDESPREAD CLOUD COVERAGE STUNTING INSOLATION ACROSS MUCH OF THE   REGION. HOWEVER...RECENT VISIBLE SATELLITE IMAGERY SUGGESTS SOME   FILTERED SUNSHINE OVER SRN NEW ENGLAND AND LONG ISLAND WHERE SFC   HEATING HAS ALLOWED TEMPERATURES TO WARM INTO THE LOWER/MIDDLE   70S...STEEPENING LOW-LEVEL LAPSE RATES TO SOME EXTENT WHILE   PROVIDING A LOCALIZED BOOST TO PBL-DERIVED BUOYANCY. NWD-DIRECTED   HORIZONTAL CONVECTIVE ROLLS IN THIS REGION AFFIRM THE COINCIDENCE OF   A DEEPER PBL WITH STRONG LOW-LEVEL SHEAR. REGIONAL VWP DATA INDICATE   A DEEP LAYER OF 40-50-KT TROPOSPHERIC FLOW THAT EXTENDS BELOW 1 KM   AGL. THIS WILL PROMOTE THE POTENTIAL FOR STRONG WIND GUSTS WITH   EMBEDDED BOWING SEGMENTS/LEWP STRUCTURES. WITH 0-1-KM SRH OF 150-350   M2/S2 ACCOMPANYING AN INTENSE...CYCLONE-LEADING LLJ...AN ISOLATED   TORNADO THREAT CANNOT BE RULED OUT...ESPECIALLY OVER SRN NEW ENGLAND   TO LONG ISLAND. HOWEVER...THERE IS SOME UNCERTAINTY WITH REGARD TO   THE LONGER-TERM INTENSITY OF CONVECTION AS IT SPREADS E OF WW   543...OWING TO THE LIMITED DEGREE OF INSTABILITY THAT WILL FURTHER   DECREASE AFTER SUNSET.   ..COHEN/HART.. 10/07/2013   ATTN...WFO...GYX...BOX...BTV...OKX...ALY...
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