394 ACUS3 KMKC 031419 SWOMCD MKC MCD 031418 WYZ000-COZ000-UTZ000-031800- SPC MESOSCALE DISCUSSION 0638 FOR SRN WY AND NWRN CO/NERN UT CONCERNING...BLIZZARD CONDITIONS... STRONG SUSTAINED WINDS FROM 30 TO 50 MPH WITH GUSTS OVER 60 MPH CREATING BLIZZARD CONDITIONS WILL CONTINUE TO BE POSSIBLE ACROSS MUCH OF SWRN/SCENTRAL WY INCLUDING ALL OF THE GREAT DIVIDE BASIN...BEFORE DIMINISHING BY MID AFTERNOON. MODERATE TO HEAVY SNOW WILL CONTINUE TO FALL ACROSS THE ROCKIES OF SCENTRAL WY THROUGH AT LEAST 18Z. STRONG WINDS WILL BEGIN TO EFFECT PORTIONS OF NWRN CO/NERN UT BY EARLY AFTERNOON. LATEST SURFACE ANALYSIS SHOWS LOW PRESSURE CENTERED OVER NWRN CO...WITH STRONG PRESSURE GRADIENT / 10MB / BETWEEN LND AND RKS IN SRN WY. THIS GRADIENT COUPLED WITH STRONG ELY 700 MB FLOW OF 40 TO 50 KTS...HAS PROVIDED FOR VERY STRONG WINDS ACROSS THE GREAT DIVIDE BASIN. STRONG UPPER LEVEL DIVERGENCE ASSOCIATED WITH UPPER LOW CENTERED OVER SRN UT...ALONG WITH STRONG LOW LEVEL OROGRAPHIC LIFT ACROSS SCENTRAL WY/FAR NCENTRAL CO HAS AIDED IN THE PRODUCTION OF MODERATE TO HEAVY SNOWFALL ACROSS PORTIONS OF CENTRAL ROCKIES MTNS. LATEST RUC2 FCST OF STRONGEST MID LEVEL FRONTOGENETICAL FORCING OVER THE ROCKIES MTNS OF SCENTRAL WY/NCENTRAL CO ALONG WITH ELY UPSLOPE FLOW WILL LEAD TO THE POTENTIAL FOR THE HEAVIEST SNOWFALL RATES OF 1 TO 2 INCHES PER HOUR ACROSS CARBON AND ERN ALBANY COUNTIES IN WY AND NRN ROUTT AND JACKSON COUNTIES IN CO THROUGH 03/18Z. AS UPPER LEVEL LOW CONTINUE TO SLIDE SWD...MID LEVEL FLOW WILL BECOME NELY AND FOCUS FOR HEAVY SNOW WILL SHIFT SWD INTO THE ROCKIES MTNS OF NCENTRAL CO DURING THE AFTERNOON HOURS. THE STRONGEST SURFACE PRESSURE GRADIENT IS ALSO FORECAST TO DECREASE ACROSS THE GREAT DIVIDE BASIN DURING THE EARLY AFTERNOON HOURS...THUS WINDS WILL BEGIN TO DIMINISH TO LESS THAN 40 MPH BY THE MID AFTERNOON HOURS ACROSS SRN WY. HOWEVER...THE PLATEAU REGION OF NWRN CO/NERN UT...INCLUDING MOST OF MOFFAT COUNTY CO AND UINTAH COUNTY UT WILL SEE AN INCREASE IN WINDS TO BETWEEN 30 AND 50 MPH STARTING BY 03/17Z AND LASTING THOROUGH MOST OF THE AFTERNOON HOURS. STRONG CAA...WILL AID IN A CHANGE OVER TO SNOW IN THESE AREAS...BUT LOW LEVEL DOWNSLOPE FLOW OFF THE NRN COLORADO ROCKIES WILL DIMINISH HEAVY SNOWFALL POTENTIAL. ..CROSBIE.. 05/03/01 ...PLEASE SEE WWW.SPC.NOAA.GOV/ FOR GRAPHIC PRODUCT...  394 ACUS3 KMKC 031419 SWOMCD MKC MCD 031418 WYZ000-COZ000-UTZ000-031800- SPC MESOSCALE DISCUSSION 0638 FOR SRN WY AND NWRN CO/NERN UT CONCERNING...BLIZZARD CONDITIONS... STRONG SUSTAINED WINDS FROM 30 TO 50 MPH WITH GUSTS OVER 60 MPH CREATING BLIZZARD CONDITIONS WILL CONTINUE TO BE POSSIBLE ACROSS MUCH OF SWRN/SCENTRAL WY INCLUDING ALL OF THE GREAT DIVIDE BASIN...BEFORE DIMINISHING BY MID AFTERNOON. MODERATE TO HEAVY SNOW WILL CONTINUE TO FALL ACROSS THE ROCKIES OF SCENTRAL WY THROUGH AT LEAST 18Z. STRONG WINDS WILL BEGIN TO EFFECT PORTIONS OF NWRN CO/NERN UT BY EARLY AFTERNOON. LATEST SURFACE ANALYSIS SHOWS LOW PRESSURE CENTERED OVER NWRN CO...WITH STRONG PRESSURE GRADIENT / 10MB / BETWEEN LND AND RKS IN SRN WY. THIS GRADIENT COUPLED WITH STRONG ELY 700 MB FLOW OF 40 TO 50 KTS...HAS PROVIDED FOR VERY STRONG WINDS ACROSS THE GREAT DIVIDE BASIN. STRONG UPPER LEVEL DIVERGENCE ASSOCIATED WITH UPPER LOW CENTERED OVER SRN UT...ALONG WITH STRONG LOW LEVEL OROGRAPHIC LIFT ACROSS SCENTRAL WY/FAR NCENTRAL CO HAS AIDED IN THE PRODUCTION OF MODERATE TO HEAVY SNOWFALL ACROSS PORTIONS OF CENTRAL ROCKIES MTNS. LATEST RUC2 FCST OF STRONGEST MID LEVEL FRONTOGENETICAL FORCING OVER THE ROCKIES MTNS OF SCENTRAL WY/NCENTRAL CO ALONG WITH ELY UPSLOPE FLOW WILL LEAD TO THE POTENTIAL FOR THE HEAVIEST SNOWFALL RATES OF 1 TO 2 INCHES PER HOUR ACROSS CARBON AND ERN ALBANY COUNTIES IN WY AND NRN ROUTT AND JACKSON COUNTIES IN CO THROUGH 03/18Z. AS UPPER LEVEL LOW CONTINUE TO SLIDE SWD...MID LEVEL FLOW WILL BECOME NELY AND FOCUS FOR HEAVY SNOW WILL SHIFT SWD INTO THE ROCKIES MTNS OF NCENTRAL CO DURING THE AFTERNOON HOURS. THE STRONGEST SURFACE PRESSURE GRADIENT IS ALSO FORECAST TO DECREASE ACROSS THE GREAT DIVIDE BASIN DURING THE EARLY AFTERNOON HOURS...THUS WINDS WILL BEGIN TO DIMINISH TO LESS THAN 40 MPH BY THE MID AFTERNOON HOURS ACROSS SRN WY. HOWEVER...THE PLATEAU REGION OF NWRN CO/NERN UT...INCLUDING MOST OF MOFFAT COUNTY CO AND UINTAH COUNTY UT WILL SEE AN INCREASE IN WINDS TO BETWEEN 30 AND 50 MPH STARTING BY 03/17Z AND LASTING THOROUGH MOST OF THE AFTERNOON HOURS. STRONG CAA...WILL AID IN A CHANGE OVER TO SNOW IN THESE AREAS...BUT LOW LEVEL DOWNSLOPE FLOW OFF THE NRN COLORADO ROCKIES WILL DIMINISH HEAVY SNOWFALL POTENTIAL. ..CROSBIE.. 05/03/01 ...PLEASE SEE WWW.SPC.NOAA.GOV/ FOR GRAPHIC PRODUCT...