Tornado Alley Forecasts, Nowcasting and Reports

[debris74]

piu che d'accordo Fabio, lo punto

update da SPC:


DAY 4-8 CONVECTIVE OUTLOOK
NWS STORM PREDICTION CENTER NORMAN OK
0351 AM CST MON FEB 19 2007

VALID 221200Z - 271200Z

MEDIUM RANGE MODELS ARE IN GOOD AGREEMENT CONCERNING THE DEVELOPMENT
OF A VIGOROUS UPPER-LEVEL TROUGH OVER THE WRN U.S. EARLY IN THE
PERIOD. AS THE LARGE UPPER-LEVEL TROUGH APPROACHES THE CNTRL U.S.
FRIDAY...LOW-LEVEL MOISTURE WILL STREAM NWD INTO THE PLAINS AND
OZARK REGION SETTING THE STAGE FOR A SEVERE WEATHER EVENT FRIDAY
AFTERNOON AND FRIDAY NIGHT. A LARGE NUMBER OF STRONG THUNDERSTORMS
WILL LIKELY DEVELOP ACROSS THE MS VALLEY ON SATURDAY AND WIDESPREAD
SEVERE WEATHER WILL BE POSSIBLE AS THE SYSTEM MOVES INTO THE OH AND
TN VALLEYS SATURDAY NIGHT. IN ADDITION...THERE IS A POTENTIAL FOR
SEVERE WEATHER ACROSS NRN FL AND THE SRN PART OF THE ATLANTIC
SEABOARD SUNDAY AS THE SYSTEM MOVES INTO THE ERN U.S.