MD
Posted by JAC on 6/12/2009, 3:05 pm
 MESOSCALE DISCUSSION 1076 NWS STORM PREDICTION CENTER NORMAN OK 0130 PM CDT FRI JUN 12 2009 AREAS AFFECTED...AR CONCERNING...SEVERE THUNDERSTORM WATCH 388... VALID 121830Z - 122000Z THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 388 CONTINUES. THE POTENTIAL FOR WIDESPREAD DAMAGING WINDS AND LARGE HAIL WILL CONTINUE THIS AFTERNOON WITH BOW ECHO. DERECHO-PRODUCING BOW ECHO CONTINUES 285-290/40-45 KT...AND AS OF 1810Z...THE LEADING EDGE OF SYSTEM WAS LOCATED FROM CARROLL AND MADISON COUNTIES INTO LOGAN AND SCOTT COUNTIES AR. OVER THE PAST HOUR...A NEW PRONOUNCED REAR INFLOW NOTCH HAS BECOME ESTABLISHED FROM CRAWFORD INTO FRANKLIN COUNTIES WITH AN ASSOCIATED DOWNSTREAM BOWING OF LEADING CONVECTIVE LINE WHICH HAS ACCELERATED TO NEAR 50 KT. LATEST VWP DATA FROM FT. SMITH APPEARS TO HAVE SAMPLED THE REAR INFLOW JET WITH 50-60 KT WINDS BETWEEN 1-2 KG AGL. DOWNSTREAM AIR MASS OVER CNTRL AR HAS WARMED THROUGH THE 80S. WHEN COUPLED WITH DEWPOINTS IN THE LOW/MID 70S AND STEEP MIDLEVEL LAPSE RATES...ENVIRONMENT IS STRONGLY UNSTABLE WITH MLCAPE OF 3000-4000 J/KG. THUS...EXPECT BOW ECHO TO CONTINUE SEWD WITH THE POTENTIAL FOR SIGNIFICANT WIND DAMAGE REACHING LITTLE ROCK AROUND 20Z. ..MEAD.. 06/12/2009 |
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In this thread:
PDS for AK; bowing MCS (Derecho winds to 105 mph) - JAC, 6/12/2009, 2:36 pm
- Terry's Chase Report - JAC, 6/13/2009, 5:16 am
- Little Rock is going to get hammered - JAC, 6/12/2009, 3:22 pm
- Could get worse - moving into higher CAPE - JAC, 6/12/2009, 3:01 pm
- Re: Could get worse - moving into higher CAPE - JAC, 6/12/2009, 3:03 pm
- Sorry - AK is Alaska; this is Arkansas (AR) - JAC, 6/12/2009, 2:58 pm
- Hot Springs Under-the-Gun - JAC, 6/12/2009, 2:53 pm
- Confirmed touchdown Conway Co near Wonderview - JAC, 6/12/2009, 3:15 pm
- Little Rock Live & Local Weather - JAC, 6/12/2009, 2:49 pm
- Over 64 knots on base velocity - JAC, 6/12/2009, 2:41 pm
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