794  
ACUS11 KWNS 060006  
SWOMCD  
SPC MCD 060006  
PAZ000-WVZ000-OHZ000-060130-  
 
MESOSCALE DISCUSSION 1762  
NWS STORM PREDICTION CENTER NORMAN OK  
0606 PM CST SUN NOV 05 2017  
 
AREAS AFFECTED...EXTREME EASTERN OHIO THROUGH WESTERN PENNSYLVANIA  
 
CONCERNING...SEVERE THUNDERSTORM WATCH 514...  
 
VALID 060006Z - 060130Z  
 
THE SEVERE WEATHER THREAT FOR SEVERE THUNDERSTORM WATCH 514  
CONTINUES.  
 
SUMMARY...LINE OF STRONG TO SEVERE STORMS SHOULD PERSIST UNTIL  
AROUND 02Z INTO WESTERN PA FOLLOWED BY A RAPID DECREASE IN  
INTENSITY. DAMAGING WIND REMAINS THE PRIMARY THREAT, BUT A BRIEF  
TORNADO CANNOT BE RULED OUT. ADDITIONAL DOWNSTREAM COUNTIES MAY BE  
ADDED TO THE WATCH IN THE PITTSBURG FORECAST AREA, BUT AN ADDITIONAL  
WW IS NOT ANTICIPATED AT THIS TIME.  
 
DISCUSSION...EARLY THIS EVENING A LINE OF STRONG TO SEVERE STORMS  
EXTENDS ALONG THE OH/PA BORDER MOVING EAST NEAR 50 KT. THE LINE IS  
EMBEDDED WITHIN VERY STRONG WIND PROFILES WITH LARGE 0-2 KM  
HODOGRAPHS AND 50+ KT EFFECTIVE BULK SHEAR. OCCASIONAL BOWING  
SEGMENTS AND MESO-VORTICES CONTINUE TO BE OBSERVED, AND THE THREAT  
FOR DAMAGING WIND WILL PERSIST NEXT COUPLE HOURS THROUGH WESTERN PA.  
HOWEVER, SURFACE ANALYSIS SHOWS A RAPID DECREASE IN THETA-E ACROSS  
CENTRAL PA WHERE TEMPERATURES ARE ONLY IN THE 50S F. THE FAST LINE  
MOVEMENT WILL OUTPACE ANY BOUNDARY LAYER RECOVERY ASSOCIATED WITH  
THE SOUTHWESTERLY LOW-LEVEL JET. THEREFORE THIS ACTIVITY WILL LIKELY  
UNDERGO A RAPID DECREASE IN INTENSITY BY 02Z AS IT APPROACHES  
CENTRAL PA.  
 
..DIAL.. 11/06/2017  
   
..PLEASE SEE WWW.SPC.NOAA.GOV FOR GRAPHIC PRODUCT
 
 
ATTN...WFO...CTP...PBZ...CLE...  
 
LAT...LON 40738049 41428018 41877951 41667891 40757881 40227914  
40007983 40048097 40738049  
 
CLICK HERE TO GO TO PREVIOUS BULLETINS.

The Nexlab SPC Page Main Text Page