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Current Conditions, Weather Forecast, and Imageryfriends
sunrise: 5:39 , sunset: 20:09 Area Forecast Discussion (glossary) FXUS65 KREV 171022 AFDREV AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE RENO NV 322 AM PDT THU MAY 17 2012 .SHORT TERM... HIGH CLOUD COVERAGE CONTINUES TO INCREASE AHEAD OF TROF APPROACHING THE CA COAST. THIS SYSTEM WILL BRING INCREASED MOISTURE TO NERN CA AND FAR NWRN NV BY MID-LATE MORNING, AND ESPECIALLY DURING THE AFTERNOON. ALTHOUGH SOME INSTBY IS EXPECTED THE PRESENCE OF WIDESPREAD CLOUD COVER COULD LIMIT TSTM FORMATION THRU MOST OF THIS AFTN. THE BEST TSTM POTENTIAL MAY END UP OCCURRING AFT 00Z ALONG THE LEADING EDGE OF THE COLD FRONT AS FORCING BECOMES MORE FOCUSED IN AREAS FROM SRN LASSEN TO PYRAMID LAKE SOUTHWARD TO NEAR I-80. IF THESE STORMS ARE ABLE TO DEVELOP, GUST FRONT AND OUTFLOW INTERACTIONS COULD TRIGGER ADDITIONAL CELLS A LITTLE FARTHER SOUTH THAN INDICATED BY THE MODEL QPF FIELDS, SO HAVE EXTENDED THE POSSIBILITY OF TSTMS INTO THE TAHOE BASIN AND FAR WRN NV DOWN TO NEAR HWY 50. THE OTHER MAIN IMPACT TODAY WILL BE GUSTY WINDS THIS AFTN-EVE AHEAD OF THE COLD FRONT, AND ALSO DUE TO GUST FRONTS AHEAD OF CONVECTIVE CELLS. WIND GUSTS OF 40-45 MPH COULD PRODUCE LOCAL AREAS OF BLOWING DUST IN PORTIONS OF W-CNTRL NV AND ERN MONO COUNTY WHICH HAVE NOT RECEIVED MUCH RAIN DURING THE PAST WEEK. THE FAR NORTH EDGE OF THIS BLOWING DUST AREA IS MERGED WITH MENTION OF SHOWERS AND TSTMS WHERE GUST FRONTS COULD KICK UP SOME DUST BEFORE THE RAIN CORES ARRIVE. IN MOST AREAS SOUTH OF I-80, HUMIDITY WILL BE QUITE LOW RESULTING IN FIRE WEATHER IMPACTS WHICH WILL BE DISCUSSED FURTHER IN THE FIRE WEATHER SECTION BELOW. THE TROF AND ITS ASSOCIATED DYNAMICS WILL MOVE QUICKLY EAST OVERNIGHT THRU EARLY FRI MORNING WITH MOST AREAS DRYING OUT EXCEPT FOR A FEW LINGERING SHOWERS IN THE W-CNTRL NV BASIN. DRY AND STABLE CONDITIONS WILL PREVAIL BOTH FRIDAY AND SATURDAY AS NW FLOW ALOFT FRIDAY TRANSITIONS INTO A FLAT RIDGE BUILDING INTO ERN CA-WRN NV. WINDS WILL BE LIGHT BOTH DAYS WITH AREAS OF CIRRUS MOVING ACROSS THE REGION, AND FLAT LATE AFTN CUMULUS MAINLY NEAR THE SIERRA. TEMP GRADIENTS TODAY WILL BE TIGHT AS TEMPS IN THE NRN SIERRA DECREASE THIS AFTERNOON WHILE THE HWY 95 CORRIDOR IN W-CNTRL NV COULD APPROACH 90 DEGREES. ON FRIDAY, HIGHS WILL BE 5-10 DEGREES COOLER ACROSS MOST OF THE REGION, EXCEPT UP TO 15 DEGREES COOLER FOR W-CNTRL NV AS MOST LOWER ELEVATIONS WILL TOP OUT IN THE LOWER- MID 70S. HIGHS WILL BE 5-10 DEGREES WARMER ON SATURDAY AS THE RIDGE BUILDS IN. MJD .LONG TERM...SUNDAY THROUGH WEDNESDAY... NO MAJOR CHANGES AGAIN IN THE LONG TERM FORECAST. UPPER RIDGE REMAINS IN PLACE OVER THE GREAT BASIN THROUGH SUNDAY, AS A TROUGH MOVES INTO THE WEST COAST FOR EARLY NEXT WEEK. LATEST GFS RUNS ARE COMING IN DEEPER WITH THE TROUGH INTO THE THE GREAT BASIN, WHICH MATCHES UP BETTER WITH THE ECMWF AND GEM. THE MAJOR DIFFERENCE IS THE GFS PUSHES THE TROUGH OUT QUICKLY WITH RIDGING BUILDING BACK INTO THE WEST COAST BY MIDWEEK. THE 00Z EC/GEM KEEP THE TROUGH OVER THE WEST THROUGH THE SECOND HALF OF NEXT WEEK. THESE DIFFERENCES LEAD TO BELOW NORMAL CONFIDENCE PAST MONDAY. TEMPERATURES SUNDAY WILL BE AROUND 10 DEGREES ABOVE NORMAL FOR LATE MAY, HITTING THE UPPER 80S IN WESTERN NEVADA AND 70S IN THE SIERRA. KEPT IN THE CHANCES OF SHOWERS MONDAY NIGHT THROUGH TUESDAY, DUE TO FORCING FROM THE INCOMING TROUGH. TEMPERATURES WILL COOL OFF TO START NEXT WEEK. DEPENDING ON IF THE GFS OR EC/GEM SOLUTION, THE COOLER AIR MAY HANG AROUND THROUGH THE END OF THE WEEK OR WE COULD BOUNCE BACK INTO ABOVE NORMAL TEMPERATURES. HOON .AVIATION... COLD FRONT WILL PUSH INTO NORTHERN CA/NV TODAY, WITH W-SW WINDS GUSTING TO 30-35KT. RIDGE WINDS OF 65KT WILL CREATE SOME LOW LEVEL TURBULENCE DOWNSTREAM OF THE SIERRA. SCATTERED SHOWERS AND A SLIGHT CHANCE OF THUNDERSTORMS CAN BE EXPECTED NORTH OF INTERSTATE 80 LATE THIS AFTERNOON AND INTO THE EVENING. THESE AREN`T EXPECTED TO AFFECT KRNO, ALTHOUGH INBOUND/OUTBOUND FLIGHTS COULD BE IMPACTED. HOON .FIRE WEATHER... A TROUGH OF LOW PRESSURE WILL PUSH A COLD FRONT THROUGH THE REGION BY THIS EVENING. AHEAD OF THE FRONT, SOUTHWEST TO WEST WINDS WILL GUST UP TO 45 MPH. THIS WILL COMBINE WITH VERY DRY CONDITIONS SOUTH OF INTERSTATE 80 TO CREATE CRITICAL FIRE WEATHER CONDITIONS THIS AFTERNOON AND EARLY EVENING. RED FLAG WARNING HAS BEEN ISSUED FOR FIRE ZONES 273, 450, 453, AND 459. PLEASE SEE THE PRODUCT FOR ADDITIONAL DETAILS. NORTH OF INTERSTATE 80, MOISTURE MOVING INTO THE REGION WILL INCREASE THE HUMIDITY, BUT WINDS WILL REMAIN GUSTY. SCATTERED SHOWERS WITH A SLIGHT CHANCE OF THUNDERSTORMS NORTH OF HIGHWAY 50 CAN BE EXPECTED WITH THE TROUGH THIS AFTERNOON AND EVENING. THESE ISOLATED STORMS COULD START A FEW NEW FIRES TODAY, ESPECIALLY IN THE DRIER AIRMASS SOUTH OF INTERSTATE 80 IN WEST-CENTRAL NEVADA. ANY NEW FIRES FROM LIGHTNING STRIKES HAVE POTENTIAL TO GROW QUICKLY WITH THE DRY CONDITIONS AND GUSTY WINDS. DF/HOON .REV WATCHES/WARNINGS/ADVISORIES... NV...RED FLAG WARNING FROM NOON TODAY TO 7 PM PDT THIS EVENING NVZ450-453. LAKE WIND ADVISORY FROM 1 PM THIS AFTERNOON TO 8 PM PDT THIS EVENING FOR PYRAMID LAKE IN NVZ004. LAKE WIND ADVISORY FROM NOON TODAY TO 11 PM PDT THIS EVENING FOR LAKE TAHOE IN NVZ002. RED FLAG WARNING FROM NOON TODAY TO 10 PM PDT THIS EVENING NVZ459. CA...RED FLAG WARNING FROM NOON TODAY TO 10 PM PDT THIS EVENING BELOW 8500 FEET FOR CAZ273. LAKE WIND ADVISORY FROM NOON TODAY TO 11 PM PDT THIS EVENING FOR LAKE TAHOE IN CAZ072. 2012 0517 0002 0007 0012 0017 0022 0027 0032 0042 0047 0052 0057 0102 0107 0112 0117 0122 0127 0132 0137 0142 0147 0152 0157 0202 0207 0212 0217 0227 0232 0237 0242 0247 0252 0257 0302 0307 0312 0317 0322 0327 0332 0337 0342 0347 0352 0357 0402 0407 0412 0417 0422 0427 0432 0437 0442 0447 0452 0457 0502 0507 0512 0517 0522 0527 0532 0537 0542 0547 0552 0557 0602 0607 0612 0617 0622 0627 0632 0637 0642 0647 0652 2012 0517 1205170700 1205170711 1205170715 1205170730 1205170741 1205170745 1205170800 1205170811 1205170815 1205170830 1205170841 1205170845 1205170900 1205170930 1205170941 1205170945 1205171000 1205171011 1205171015 1205171030 1205171041 1205171045 1205171100 1205171111 1205171115 1205171130 1205171141 1205171145 1205171200 1205171230 1205171241 1205171245 1205171300 1205171311 1205171315 1205171330 1205171341 |
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