Long-tack tornadoes expected. Another PDS coming up.
Posted by
JAC on 5/25/2011, 1:14 pm

MESOSCALE DISCUSSION 0955 NWS STORM PREDICTION CENTER NORMAN OK 1152 AM CDT WED MAY 25 2011 AREAS AFFECTED...MOST OF AR...WRN TN...NRN MS CONCERNING...SEVERE POTENTIAL...TORNADO WATCH LIKELY VALID 251652Z - 251815Z DISCRETE SUPERCELLS SHOULD FORM BY MID-AFTERNOON WITH A POTENTIAL THREAT OF LONG-TRACKED/STRONG TORNADOES. A PDS TORNADO WATCH WILL BE REQUIRED...MOST LIKELY BY 18Z. RECENT VISIBLE SATELLITE IMAGERY INDICATES A DEEPENING CU FIELD AND CLOUD STREETS ACROSS MUCH OF AR DOWNSTREAM OF A COLD FRONT THAT EXTENDED FROM FAR SWRN MO INTO NERN TX AS OF 16Z. 12Z WRF-NMM DEPICTS DISCRETE CELLS EMANATING OUT OF THIS CU FIELD BY 19Z...WITH RECENT HRRR RUNS FASTER WITH TSTM INITIATION BUT SIMILAR IN CONVECTIVE MODE. ENVIRONMENT IS PRIMED FOR RAPID EVOLUTION TO SUPERCELLS GIVEN VERY FAVORABLE LOW/MID-LEVEL HODOGRAPHS PER PROFILER AND VWP DATA...AMIDST A BROAD ZONE OF STRONG INSTABILITY WITH MLCAPE AROUND 2500 J/KG. ANY SUPERCELLS DEVELOPING WITHIN A BROAD AXIS OF A 45-55 KT LLJ...POTENTIAL FOR LONG-LIVED/STRONG TORNADOES WILL INCREASE GREATLY TOWARDS MID-AFTERNOON. ..GRAMS.. 05/25/2011 |
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In this thread:
Mid MS-River Area under High-Risk for Severe Weather Today -
JAC,
5/25/2011, 9:01 am- IN dodged a bullet. Looks like no fatalities. - JAC, 5/26/2011, 6:14 am
- Indy TV streaming damage - IndyDave, 5/25/2011, 9:26 pm
- Strong violent tornadoes expected next 2 to 4 hrs - JAC, 5/25/2011, 4:42 pm
- PDS 2 - JAC, 5/25/2011, 1:50 pm
- St Louis Under-the-Gun - JAC, 5/25/2011, 1:07 pm
- Live Feed - JAC, 5/25/2011, 4:44 pm
- Funnel spotted near mall - JAC, 5/25/2011, 4:38 pm
- Sedalia, MO just took a hit - JAC, 5/25/2011, 2:42 pm
- Tornadic cells building and approaching St Louis - JAC, 5/25/2011, 2:14 pm
- Re: St Louis Under-the-Gun - ArgosyTn, 5/25/2011, 1:26 pm
- Strong Uncapped STP in AR - JAC, 5/25/2011, 12:29 pm
- Re: Strong Uncapped STP in AR - ArgosyTn, 5/25/2011, 1:46 pm
- Long-tack tornadoes expected. Another PDS coming up. - JAC, 5/25/2011, 1:14 pm
- MAJOR TORNADO OUTBREAK IS FORECAST - JAC, 5/25/2011, 12:50 pm
- Large-area PDS up - JAC, 5/25/2011, 12:37 pm
- Here's the current STP - JAC, 5/25/2011, 12:30 pm
- IN later this morning - JAC, 5/25/2011, 9:50 am
- Memphis: NAM at 21Z - JAC, 5/25/2011, 9:29 am
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