Local Forecast Discussion
000 FXUS65 KPIH 092101 AFDPIH AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE POCATELLO ID 200 PM MST TUE MAR 9 2010 .SHORT TERM...TONIGHT THROUGH FRIDAY. THE LATEST SATELLITE IMAGERY WAS SHOWING A SPLIT UPPER TROUGH SHIFTING THROUGH THE GREAT BASIN AND NRN ROCKIES THIS AFTERNOON WHILE THE NEXT UPSTREAM PAC SHORT-WAVE WAS ADVANCING INTO THE WASHINGTON/OREGON COASTAL WATERS. SCATTERED SHOWERS WILL LINGER ACROSS THE REGION THIS EVENING AS THE SPLIT TROUGH WORKS EAST OF THE DIVIDE LATE TONIGHT. TODAYS MODEL RUN HAS REMAINED FAIRLY CONSISTENT WITH YESTERDAYS RUN IN SHEARING THE NEXT INCOMING PAC WAVE SW OF THE REGION INTO NEVADA WEDNESDAY RESULTING IN A BROAD UPPER TROUGH DEVELOPING OVER THE NRN ROCKIES AND GREAT PLAINS STATES. THIS DEVELOPMENT SHOULD SUPPORT INSTABILITY SHOWERS FAVORING THE HIGHER TERRAIN WEDNESDAY AFTERNOON. A SHORT-WAVE RIDGE BUILDS OVER THE NW STATES WEDNESDAY NIGHT AND SHIFTS OVERHEAD THURSDAY FOR DRIER CONDITIONS PERSISTING THROUGH FRIDAY. EXPECT BELOW NORMAL TEMPERATURES WEDNESDAY (MID/UPPER 30S) WARMING TOWARD CLIMATOLOGY (UPPER 40S) BY FRIDAY. HUSTON .LONG TERM...FRIDAY NIGHT THROUGH TUESDAY. EXPECT THE NEXT SPLIT FLOW SYSTEM LATE FRIDAY NIGHT INTO SATURDAY IMPACTING MOSTLY THE MAGIC VALLEY...SOUTH CENTRAL HIGHLANDS AND THE CENTRAL MOUNTAINS EARLY ON. THE ECMWF HAS SPED THIS SYSTEM UP SLIGHTLY BUT IS STILL SLOWER AND MORE MOIST THAN THE GFS. EXPECT SHOWERS EARLY SATURDAY LINGERING INTO SUNDAY MORNING MAINLY ACROSS THE EASTERN HIGHLANDS. SUNDAY HIGH PRESSURE STARTS BUILDING IN FROM THE WEST AND LOOKS TO REMAIN THROUGH THE END OF THE PERIOD. HAVE RAISED POPS SIGNIFICANTLY FOR SATURDAY AND CONTINUED TO LOWER POPS SUNDAY THROUGH THE END OF THE PERIOD. EXPECT SLIGHTLY BELOW CLIMO TO NEAR CLIMO TEMPERATES EARLY IN THE PERIOD BECOMING ABOVE CLIMO TEMPERATURES BY THE END OF THE PERIOD. WYATT && .AVIATION...PACIFIC SYSTEM IS JUST EXITING THE AREA WITH SOME LINGERING SNOW SHOWERS FOR KPIH AND KIDA. KSUN IS CURRENTLY IFR AND SHOULD IMPROVE TO MVFR BY MID TO LATE AFTERNOON. EXPECT VFR CONDITIONS FOR KSUN EARLY IN THE EVENING. KBYI IS VFR CURRENTLY WITH ELEVATED WINDS. EXPECT MOSTLY VFR CONDITIONS FOR KBYI DURING THE PERIOD. SOME LOWER MVFR STRATUS CIGS ARE POSSIBLE TOMORROW LATE MORNING AHEAD OF THE NEXT WEAKER PACIFIC TROUGH WITH WINDS PICKING BACK UP BY LATE MORNING INTO EARLY AFTERNOON. KPIH WILL SEE MVFR STRATUS CIGS MOST OF THE AFTERNOON AND NIGHT WITH ELEVATED WINDS. KPIH WILL MOST LIKE BECOME VFR BY EARLY TO MID MORNING BEFORE GOING BACK DOWN TO MVFR WITH THE NEXT SYSTEM BY LATE MORNING TO EARLY AFTERNOON. KIDA WILL SEE MOSTLY IFR CONDITIONS THROUGH MOST OF TOMORROW. IT IS POSSIBLE THEY MAY COME UP TO MVFR BRIEFLY BEFORE THE NEXT SYSTEM LATE MORNING TO EARLY AFTERNOON. WYATT && .PIH WATCHES/WARNINGS/ADVISORIES...NONE. && $$
NWS PIH Office Area Forecast Discussion