WWUS9 KMKC 182030 SEL9 MKC WW 182030 PAZ000-NJZ000-NYZ000-190300- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 629 STORM PREDICTION CENTER NORMAN OK 430 PM EDT FRI JUL 18 1997 THE STORM PREDICTION CENTER HAS ISSUED A SEVERE THUNDERSTORM WATCH FOR PORTIONS OF MOST OF PENNSYLVANIA NORTHERN AND CENTRAL NEW JERSEY SOUTHEASTERN NEW YORK AND ADJACENT COASTAL WATERS EFFECTIVE THIS FRIDAY AFTERNOON AND EVENING FROM 445 PM UNTIL 1100 PM EDT. HAIL TO 1 1/2 INCHES IN DIAMETER...THUNDERSTORM WIND GUSTS TO 70 MPH...AND DANGEROUS LIGHTNING ARE POSSIBLE IN THESE AREAS. THE SEVERE THUNDERSTORM WATCH AREA IS ALONG AND 75 STATUTE MILES NORTH AND SOUTH OF A LINE FROM 35 MILES WEST NORTHWEST OF ALTOONA PENNSYLVANIA TO 25 MILES NORTHEAST OF NEW YORK CITY NEW YORK. REMEMBER...A SEVERE THUNDERSTORM WATCH MEANS CONDITIONS ARE FAVORABLE FOR SEVERE THUNDERSTORMS IN AND CLOSE TO THE WATCH AREA. PERSONS IN THESE AREAS SHOULD BE ON THE LOOKOUT FOR THREATENING WEATHER CONDITIONS AND LISTEN FOR LATER STATEMENTS AND POSSIBLE WARNINGS. OTHER WATCH INFORMATION...THIS SEVERE THUNDERSTORM WATCH REPLACES SEVERE THUNDERSTORM WATCH NUMBER 626. WATCH NUMBER 626 WILL NOT BE IN EFFECT AFTER 445 PM EDT. CONTINUE...WW 624...WW 625...WW 627...WW 628... DISCUSSION...CLUSTER OF THUNDERSTORMS WITH A HISTORY OF WIND DAMAGE MOVING ALONG COLD FRONT INTO WATCH AREA WHERE 2000 J/KG CAPES PRESENT. 60 KT MID LEVEL FLOW WILL RESULT IN FURTHER POTENTIAL FOR DAMAGING DOWNBURSTS. AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 1 1/2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 450. MEAN STORM MOTION VECTOR 30045. ...ROGASH ;413,0785 415,0732 394,0732 392,0785;
