144 WWUS20 KWNS 240137 SEL6 SPC WW 240137 ALZ000-FLZ000-MSZ000-240300- URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH - NUMBER 436 NWS STORM PREDICTION CENTER NORMAN OK 837 PM CDT TUE JUL 23 2013 THE NWS STORM PREDICTION CENTER HAS CANCELLED SEVERE THUNDERSTORM WATCH NUMBER 436 ISSUED AT 115 PM CDT FOR PORTIONS OF ALABAMA FLORIDA MISSISSIPPI  398 WWUS20 KWNS 240203 SEL5 SPC WW 240203 INZ000-KYZ000-MDZ000-OHZ000-PAZ000-WVZ000-LEZ000-240200- URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH - NUMBER 435 NWS STORM PREDICTION CENTER NORMAN OK 1003 PM EDT TUE JUL 23 2013 THE NWS STORM PREDICTION CENTER HAS CANCELLED SEVERE THUNDERSTORM WATCH NUMBER 435 ISSUED AT 155 PM EDT FOR PORTIONS OF INDIANA KENTUCKY MARYLAND OHIO PENNSYLVANIA WEST VIRGINIA LAKE ERIE  845 WWUS20 KWNS 240303 SEL7 SPC WW 240303 ARZ000-KSZ000-MOZ000-240300- URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH - NUMBER 437 NWS STORM PREDICTION CENTER NORMAN OK 1003 PM CDT TUE JUL 23 2013 THE NWS STORM PREDICTION CENTER HAS CANCELLED SEVERE THUNDERSTORM WATCH NUMBER 437 ISSUED AT 305 PM CDT FOR PORTIONS OF ARKANSAS KANSAS MISSOURI  979 WWUS20 KWNS 240357 SEL9 SPC WW 240357 NEZ000-240400- URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH - NUMBER 439 NWS STORM PREDICTION CENTER NORMAN OK 957 PM MDT TUE JUL 23 2013 THE NWS STORM PREDICTION CENTER HAS CANCELLED SEVERE THUNDERSTORM WATCH NUMBER 439 ISSUED AT 515 PM MDT FOR PORTIONS OF NEBRASKA  378 WWUS20 KWNS 240545 SEL0 SPC WW 240545 ARZ000-OKZ000-241100- URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 440 NWS STORM PREDICTION CENTER NORMAN OK 1245 AM CDT WED JUL 24 2013 THE NWS STORM PREDICTION CENTER HAS ISSUED A * SEVERE THUNDERSTORM WATCH FOR PORTIONS OF NORTHWEST ARKANSAS EASTERN OKLAHOMA * EFFECTIVE THIS WEDNESDAY MORNING FROM 1245 AM UNTIL 600 AM CDT. * PRIMARY THREATS INCLUDE... SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE SEVERAL LARGE HAIL EVENTS TO 1.5 INCHES IN DIAMETER POSSIBLE THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 65 STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES WEST NORTHWEST OF MUSKOGEE OKLAHOMA TO 25 MILES EAST OF DURANT OKLAHOMA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU0). PRECAUTIONARY/PREPAREDNESS ACTIONS... 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES. && OTHER WATCH INFORMATION...CONTINUE...WW 438... DISCUSSION...A BOW ECHO JUST S OF TULSA IS EXPECTED TO CONTINUE SWD ALONG A N-S ORIENTED OUTFLOW BOUNDARY PRESENT ACROSS FAR ERN OK WITH A CONTINUED RISK FOR DAMAGING WINDS. OTHER STORMS DEVELOPING ATOP THE TRAILING COLD POOL ACROSS N-CNTRL OK WILL BE CAPABLE OF LARGE HAIL WITH THE POTENTIAL FOR A SECONDARY...SWD-PROPAGATING CLUSTER ARISING OUT OF THIS ACTIVITY. AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 1.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 33045. ...MEAD  211 WWUS20 KWNS 240603 SEL8 SPC WW 240603 KSZ000-OKZ000-240600- URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH - NUMBER 438 NWS STORM PREDICTION CENTER NORMAN OK 103 AM CDT WED JUL 24 2013 THE NWS STORM PREDICTION CENTER HAS CANCELLED SEVERE THUNDERSTORM WATCH NUMBER 438 ISSUED AT 515 PM CDT FOR PORTIONS OF KANSAS OKLAHOMA  419 WWUS20 KWNS 241103 SEL0 SPC WW 241103 ARZ000-OKZ000-241100- URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH - NUMBER 440 NWS STORM PREDICTION CENTER NORMAN OK 603 AM CDT WED JUL 24 2013 THE NWS STORM PREDICTION CENTER HAS CANCELLED SEVERE THUNDERSTORM WATCH NUMBER 440 ISSUED AT 1245 AM CDT FOR PORTIONS OF ARKANSAS OKLAHOMA  849 WWUS20 KWNS 241943 SEL1 SPC WW 241943 COZ000-NEZ000-WYZ000-250300- URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 441 NWS STORM PREDICTION CENTER NORMAN OK 140 PM MDT WED JUL 24 2013 THE NWS STORM PREDICTION CENTER HAS ISSUED A * SEVERE THUNDERSTORM WATCH FOR PORTIONS OF NORTHEASTERN COLORADO WESTERN AND NORTHERN NEBRASKA SOUTHEASTERN WYOMING * EFFECTIVE THIS WEDNESDAY AFTERNOON AND EVENING FROM 140 PM UNTIL 900 PM MDT. * PRIMARY THREATS INCLUDE... SEVERAL VERY LARGE HAIL EVENTS TO 2.5 INCHES IN DIAMETER POSSIBLE SEVERAL DAMAGING WIND GUSTS WITH A FEW SIGNIFICANT GUSTS TO 75 MPH POSSIBLE THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 135 STATUTE MILES EAST AND WEST OF A LINE FROM 35 MILES EAST SOUTHEAST OF AKRON COLORADO TO 60 MILES NORTH NORTHWEST OF MULLEN NEBRASKA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU1). PRECAUTIONARY/PREPAREDNESS ACTIONS... 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES. && DISCUSSION...SVR THREAT IS RAMPING UP ACROSS THIS REGION WITH INCREASING CONVECTIVE COVERAGE...IN ENVIRONMENT FAVORABLE FOR SLOW-MOVING SUPERCELLS...WITH LARGE HAIL AND OCNL STG-SVR GUSTS. LOW-LEVEL CONVERGENCE WILL REMAIN JUXTAPOSED WITH SUFFICIENT MOISTURE AND LAPSE RATES TO SUPPORT 2000-3000 J/KG PRECONVECTIVE MLCAPE. DEEP-LAYER SHEAR STRENGTHENS WITH NEWD EXTENT...WITH EFFECTIVE SHEAR PEAKING AROUND 50-55 KT OVER NRN NEB. SOME AGGREGATED/UPSCALE GROWTH AND FORWARD PROPAGATION IS POSSIBLE AS WELL...IN WHICH CASE DAMAGING WIND THREAT WOULD BECOME BETTER ORGANIZED. AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 2.5 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 65 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 32015. ...EDWARDS  095 WWUS20 KWNS 242333 SEL2 SPC WW 242333 MTZ000-250700- URGENT - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WATCH NUMBER 442 NWS STORM PREDICTION CENTER NORMAN OK 525 PM MDT WED JUL 24 2013 THE NWS STORM PREDICTION CENTER HAS ISSUED A * SEVERE THUNDERSTORM WATCH FOR PORTIONS OF NORTHERN AND EASTERN MONTANA * EFFECTIVE THIS WEDNESDAY AFTERNOON AND THURSDAY MORNING FROM 525 PM UNTIL 100 AM MDT. * PRIMARY THREATS INCLUDE... SEVERAL VERY LARGE HAIL EVENTS TO 2 INCHES IN DIAMETER POSSIBLE SEVERAL DAMAGING WIND GUSTS TO 70 MPH POSSIBLE THE SEVERE THUNDERSTORM WATCH AREA IS APPROXIMATELY ALONG AND 70 STATUTE MILES NORTH AND SOUTH OF A LINE FROM 20 MILES NORTH OF SIDNEY MONTANA TO 50 MILES SOUTH SOUTHWEST OF CUT BANK MONTANA. FOR A COMPLETE DEPICTION OF THE WATCH SEE THE ASSOCIATED WATCH OUTLINE UPDATE (WOUS64 KWNS WOU2). PRECAUTIONARY/PREPAREDNESS ACTIONS... 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. SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES. && OTHER WATCH INFORMATION...CONTINUE...WW 441... DISCUSSION...TSTMS HAVE FORMED IN NE MT IN THE PAST 2 HOURS...IN ZONE OF LOW-LVL ASCENT AND INSTABILITY ALONG AND N OF WEAK WNW-ESE COLD FRONT. ADDITIONAL STORMS ARE EXPECTED TO CONTINUE FORMING IN THE REGION...MOVING/DEVELOPING ESE WITH THE FRONT. FARTHER W...A SEPARATE AREA OF SLIGHTLY POST-FRONTAL STORMS IS PRESENT ATTM ALONG THE ERN SLOPES OF THE RCKYS IN SW AB. THIS ACTIVITY SHOULD DEVELOP SEWD ALONG THE ERN SLOPES OF THE MOUNTAINS AND ADJACENT HIGH PLNS INTO N CNTRL MT AS THE FRONT CONTINUES SLOWLY SWD...WITH THE ACTIVITY FED BY ENHANCED UPSLOPE FLOW/MOISTURE TRANSPORT IN THE WAKE OF THE BOUNDARY. AS THE ENTIRE WW REGION WILL BE IN ZONE OF LARGE SCALE ASCENT AND MODERATE DEEP SHEAR DOWNSTREAM FROM UPR IMPULSE CROSSING AB/SK...SETUP MAY YIELD ADDITIONAL SCTD SUPERCELLS WITH A RISK FOR LARGE HAIL...LOCALLY DMGG WIND...AND PERHAPS AN ISOLD TORNADO. THE 01Z CONVECTIVE OTLK WILL BE ISSUED SLIGHTLY EARLY AND INCLUDE PARTS OF THE NRN HIGH PLNS IN A SLIGHT RISK AREA. AVIATION...A FEW SEVERE THUNDERSTORMS WITH HAIL SURFACE AND ALOFT TO 2 INCHES. EXTREME TURBULENCE AND SURFACE WIND GUSTS TO 60 KNOTS. A FEW CUMULONIMBI WITH MAXIMUM TOPS TO 500. MEAN STORM MOTION VECTOR 30030. ...CORFIDI