NCEP PROGNOSTIC DISCUSSION FROM 0000Z MON 04 FEB 2002 HYDROMETEOROLOGICAL PREDICTION CENTER...NWS...CAMP SPRINGS MD REF 12 TO 48HR MANUAL GRAPHICS SPLIT FLOW CONTINUES ACROSS US THIS PD...WITH NRN STREAM DEAMPLIFYING ALONG CANADIAN BORDER...AND SRN STREAM CONFINED BELOW 35N. BIG NEWS NEXT TWO DAYS WILL BE PCPN EVENT FROM TX INTO LOWER MS VALLEY. LARGE POS TILT TROF IN SRN STREAM WILL PUSH ACROSS NRN MEXICO...TAPPING A CONSIDERABLE SLUG OF SUBTROPICAL MOISTURE FROM THE PAC. S/W PEELING OFF FROM THE NRN STREAM WILL PLUNGE DOWN THE LENGTH OF THE ROCKIES TOWARDS THE SWRN TROF... HELPING TO AMPLIFY THE IMPULSE AS IT WORKS ITS WAY EWD. EXPECT RAINS TO GRADUALLY OVERSPREAD TX FROM W TO E DURING THE NEXT 36 HRS...COVERING MOST OF THE STATE BY EARLY TUE MORNING. AS GULF MOISTURE IS DRAWN NWD BY JET ON E SIDE OF DEVELOPING STORM... EXPECT RAINS TO SPREAD INTO LOWER MS VALLEY BY THE END OF THE DAY TUE...WITH SFC LOW DEVELOPING JUST OFF NWRN GULF COAST. ENOUGH COLD AIR SHOULD BE AVAILABLE ON THE NW FRINGES OF THE PCPN SHIELD TO PRODUCE LIGHT SNOW FROM SERN NM INTO THE WRN TX PANHANDLE. SLEET AND SNOW ARE POSSIBLE LATE TUE ON THE NERN EDGE OF THE SYSTEM AS WELL FROM THE ERN RED RIVER VALLEY ACROSS SRN AR AND INTO CENTRAL MS. ELSEWHERE...VIGOROUS TROF IN NRN STREAM OVER NERN STATES WILL RAPIDLY EJECT INTO ATL THIS PD...WITH REINFORCING SHOT OF COLD AIR FOR THE REGION. LIGHT SNOWS ARE EXPECTED EARLY TODAY FROM THE ERN LAKES INTO THE CENTRAL APPALACHIANS AS STRONG VORT ENERGY SWEEPS THRU. DEVELOPING STORM WELL E OF NEW ENGLAND COAST WILL CLIP ME WITH MOSTLY LIGHT SNOW TODAY...BEFORE WHOLE SYSTEM ROCKETS AWAY FROM CANADIAN MARITIMES TONIGHT. FARTHER W...ARCTIC S/W WILL GRAZE NRN LAKES...WRN NY...AND WRN NEW ENGLAND TUE WITH ANOTHER ROUND OF LIGHT SNOW AND SHOWERS... THOUGH THE TRAJECTORY OF THIS IMPULSE WILL BE MORE EWD THAN SEWD LIKE ITS PREDECESSOR. FINALLY...S/W TROF WILL WASH OUT AS IT HITS MEAN RIDGE OVER PAC NW TUE. PREFER SLIGHTLY FASTER AVN TIMING WITH THIS SYSTEM...WITH MOST OF THE STEADIER PCPN ENDING OVER THE NW BY F48. CISCO/FORECAST OPERATIONS BRANCH GRAPHICS AVAILABLE AT: