NWS STORM PREDICTION CENTER NORMAN OK 1258 AM CDT THU JUN 12 2014 VALID 121200Z - 131200Z ...THERE IS A SLGT RISK OF SVR TSTMS FROM PARTS OF CENTRAL AND ERN TX...SERN OK TO THE LOWER MS VALLEY... ...SUMMARY... SEVERE THUNDERSTORMS ARE EXPECTED FROM SOUTHEAST OKLAHOMA THROUGH MUCH OF CENTRAL AND EASTERN TEXAS AND EAST INTO THE LOWER MISSISSIPPI VALLEY. VERY LARGE HAIL AND DAMAGING WINDS WILL BE THE MAIN THREATS...BUT A FEW TORNADOES ARE POSSIBLE. ADDITIONAL MORE ISOLATED STRONG TO SEVERE STORMS WILL BE POSSIBLE IN THE NORTHERN AND CENTRAL ROCKIES...AND ACROSS PARTS OF MID-ATLANTIC STATES TO THE LOWER GREAT LAKES REGION. ...SYNOPSIS... MODELS MAINTAIN A PROGRESSIVE FLOW REGIME ACROSS THE CONTINENTAL U.S. THIS FORECAST PERIOD. THE ERN STATES UPPER TROUGH WILL WEAKEN AS IT DRIFTS EWD. MEANWHILE...A STRONGER NRN STREAM SHORTWAVE TROUGH WILL MOVE FROM THE UPPER MS VALLEY INTO THE GREAT LAKES REGION...WITH THE NEXT UPSTREAM THROUGH TRACKING INTO THE NWRN STATES AND NRN ROCKIES. A LOWER-AMPLITUDE SHORTWAVE TROUGH...NOW MOVING THROUGH THE FOUR CORNERS REGION PER WATER VAPOR IMAGERY... WILL DEAMPLIFY AS IT CONTINUES EWD THEN SEWD THROUGH THE SRN PLAINS TO THE NWRN GULF COAST REGION. AT THE SURFACE...A COLD FRONT WILL MOVE THROUGH THE GREAT LAKES AND MID MS TO OH VALLEYS WITH THE TRAILING PORTION OF THIS BOUNDARY ADVANCING SWD INTO THE SRN PLAINS AND LOWER MS VALLEY REGION. A WARM FRONT WILL LIFT NWD THROUGH ERN TX AND THE LOWER MS VALLEY.
jeudi 12 juin 2014
Jun 12, 2014 0600 UTC Day 1 Convective Outlook,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,http://www.spc.noaa.gov/products/outlook/day1otlk.html
DAY 1 CONVECTIVE OUTLOOK
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