Alert archive / California / Winter Storm Warnings in 2011
Winter Storm Warning 1, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this winter storm warning at Feb 25, 2011, 3:52 AM PST for Monterey County, California. It took effect at Feb 25, 2011, 4:00 PM PST. It was in force for 17 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Feb 25, 2011, 3:52 AM PST (11:52 UTC)
- In effect from
- Feb 25, 2011, 4:00 PM PST
- Expired
- Feb 26, 2011, 8:37 AM PST
- In force
- 17 hr
- Issued by
- NWS San Francisco Bay Area, CA
County Monterey County, CA
The radar
The San Francisco radar (KMUX), 115 km from the middle of the area, began a volume at 11:55 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Vandenberg AFB, CA (KVBG), launched 00:00Z, 11.9 hours before the alert went out and 183 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1040 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- -70 m²/s²
- 0-3 km storm-relative helicity
- 51 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
987 WWUS46 KMTR 251152 WSWMTR URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA 352 AM PST FRI FEB 25 2011 CAZ517-252000- /O.UPG.KMTR.WW.Y.0002.110226T0000Z-110226T1800Z/ /O.NEW.KMTR.WS.W.0001.110226T0000Z-110227T0000Z/ SANTA LUCIA MOUNTAINS AND LOS PADRES NATIONAL FOREST- 352 AM PST FRI FEB 25 2011 ...WINTER STORM WARNING IN EFFECT FROM 4 PM THIS AFTERNOON TO 4 PM PST SATURDAY... THE NATIONAL WEATHER SERVICE IN SAN FRANCISCO HAS ISSUED A WINTER STORM WARNING FOR SNOW...WHICH IS IN EFFECT FROM 4 PM THIS AFTERNOON TO 4 PM PST SATURDAY. THE WINTER WEATHER ADVISORY IS NO LONGER IN EFFECT. * SNOW ACCUMULATIONS: 7 TO 10 INCHES BELOW 3000 FEET. LOCALLY 12 INCHES OR MORE FOR ELEVATIONS ABOVE 3000 FEET. * ELEVATION: ABOVE 1000 FEET. * TIMING: SNOW WILL BEGIN TO MIX WITH RAIN LATE THIS AFTERNOON...CHANGING TO ALL SNOW THIS EVENING. SNOW SHOWERS COULD BE LOCALLY HEAVY TONIGHT AND SATURDAY...BEFORE DECREASING SATURDAY AFTERNOON. * LOCATIONS INCLUDE: ALL ROADWAYS ABOVE 1000 FEET INCLUDING LAURELES GRADE. * IMPACTS: POTENTIAL FOR SIGNIFICANT TRAVEL IMPACTS WITH WIDESPREAD SNOWFALL ON MANY ROADWAYS LATE TONIGHT AND SATURDAY. LOCALLY BREEZY CONDITIONS WILL LIKELY LEAD TO AREAS OF BLOWING SNOW WITH VERY LOW VISIBILITIES. COLD TEMPERATURES WILL NOT ALLOW FOR RAPID MELTING. SNOW ON TREE BRANCHES COULD LEAD TO POWER OUTAGES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW ARE EXPECTED OR OCCURRING. STRONG WINDS ARE ALSO POSSIBLE. THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$ CAZ516-528>530-252000- /O.EXA.KMTR.WW.Y.0002.110226T0000Z-110226T1800Z/ SOUTHERN SALINAS VALLEY...ARROYO SECO...AND LAKE SAN ANTONIO- NORTHERN SALINAS VALLEY...HOLLISTER VALLEY...AND CARMEL VALLEY- NORTHERN MONTEREY BAY-SOUTHERN MONTEREY BAY AND BIG SUR COAST- 352 AM PST FRI FEB 25 2011 ...WINTER WEATHER ADVISORY IN EFFECT FROM 4 PM THIS AFTERNOON TO 10 AM PST SATURDAY ABOVE 500 FEET... THE NATIONAL WEATHER SERVICE IN SAN FRANCISCO HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW ABOVE 500 FEET...WHICH IS IN EFFECT FROM 4 PM THIS AFTERNOON TO 10 AM PST SATURDAY. * SNOW ACCUMULATIONS: LOCALLY UP TO 1 INCH ABOVE 500 FEET...LITTLE OR NO ACCUMULATION AT SEA LEVEL. * ELEVATION: SNOW COULD ACCUMULATE ABOVE 500 FEET. * TIMING: RAIN WILL TURN TO SHOWERS THIS AFTERNOON. SNOW WILL MIX WITH RAIN LATE THIS AFTERNOON AND EVENING. SNOW SHOWERS ARE LIKELY LATE TONIGHT AND SATURDAY MORNING WITH LIGHT ACCUMULATIONS POSSIBLE ABOVE 500 FEET. * LOCATIONS INCLUDE: ALL ROADWAYS ABOVE 500 FEET ALONG THE COAST AND IN THE SALINAS VALLEY. * IMPACTS: POTENTIAL FOR SIGNIFICANT TRAVEL IMPACTS WITH LOCAL SNOW ACCUMULATIONS ABOVE 500 FEET. SNOW ON TREE BRANCHES COULD LEAD TO POWER OUTAGES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ CAZ518-252000- /O.EXT.KMTR.WW.Y.0002.110226T0000Z-110227T0000Z/ MOUNTAINS OF SAN BENITO AND INTERIOR MONTEREY COUNTY INCLUDING PINNACLES NATIONAL MONUMENT- 352 AM PST FRI FEB 25 2011 ...WINTER WEATHER ADVISORY NOW IN EFFECT FROM 4 PM THIS AFTERNOON TO 4 PM PST SATURDAY... THE WINTER WEATHER ADVISORY IS NOW IN EFFECT FROM 4 PM THIS AFTERNOON TO 4 PM PST SATURDAY. * SNOW ACCUMULATIONS: 4 TO 6 INCHES BELOW 3000 FEET. LOCALLY 6 INCHES OR MORE ABOVE 3000 FEET. * ELEVATION: ABOVE 1000 FEET. * TIMING: SNOW WILL BEGIN TO MIX WITH RAIN LATE THIS AFTERNOON...CHANGING TO ALL SNOW THIS EVENING. SNOW SHOWERS ARE EXPECTED TONIGHT AND SATURDAY...BEFORE DECREASING SATURDAY AFTERNOON. * LOCATIONS INCLUDE: ALL ROADWAYS ABOVE 1000 FEET INCLUDING PANOCHE PASS AND SHOTGUN PASS IN SAN BENITO COUNTY...THE BITTERWATER AREA IN SAN BENITO COUNTY...AND CALIFORNIA HIGHWAY 198 ALONG THE MONTEREY AND FRESNO COUNTY BORDER. * IMPACTS: POTENTIAL FOR SIGNIFICANT TRAVEL IMPACTS WITH WIDESPREAD SNOWFALL ON MANY ROADWAYS LATE TONIGHT AND SATURDAY. LOCALLY BREEZY CONDITIONS WILL LIKELY LEAD TO AREAS OF BLOWING SNOW WITH VERY LOW VISIBILITIES. COLD TEMPERATURES WILL NOT ALLOW FOR RAPID MELTING. SNOW ON TREE BRANCHES COULD LEAD TO POWER OUTAGES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ CAZ507-252000- /O.CON.KMTR.WW.Y.0002.000000T0000Z-110226T0000Z/ NORTH BAY MOUNTAINS- 352 AM PST FRI FEB 25 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST THIS AFTERNOON... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST THIS AFTERNOON. * SNOW ACCUMULATIONS: 2 TO 4 INCHES BELOW 3000 FEET. 4 INCHES OR MORE FOR ELEVATIONS ABOVE 3000 FEET. * ELEVATION: 1000 FEET. * TIMING: SNOW WILL MIX WITH RAIN THIS MORNING CHANGING TO ALL SNOW BY LATE MORNING. STEADY PRECIPITATION WILL CHANGE TO SNOW SHOWERS BY THIS AFTERNOON. * LOCATIONS INCLUDE: HIGHWAY 29 BETWEEN CALISTOGA AND MIDDLETOWN. ALL ROADWAYS ABOVE 1000 FEET IN SONOMA...NAPA AND MARIN COUNTIES. * IMPACTS: POTENTIAL FOR SIGNIFICANT TRAVEL IMPACTS WITH WIDESPREAD SNOWFALL ON MANY ROADWAYS BY THIS AFTERNOON. LOCALLY BREEZY CONDITIONS WILL LIKELY LEAD TO AREAS OF BLOWING SNOW WITH VERY LOW VISIBILITIES. COLD TEMPERATURES WILL NOT ALLOW FOR RAPID MELTING. SNOW ON TREE BRANCHES COULD LEAD TO POWER OUTAGES. * PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ CAZ511-512-252000- /O.CON.KMTR.WW.Y.0002.110226T0000Z-110226T1800Z/ EAST BAY HILLS AND DIABLO RANGE-SANTA CRUZ MOUNTAINS- 352 AM PST FRI FEB 25 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 PM THIS AFTERNOON TO 10 AM PST SATURDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 PM THIS AFTERNOON TO 10 AM PST SATURDAY. * SNOW ACCUMULATIONS: 2 TO 4 INCHES BELOW 3000 FEET. LOCALLY 4 INCHES OR MORE ABOVE 3000 FEET. * ELEVATION: 1000 FEET. * TIMING: SNOW WILL BEGIN TO MIX WITH RAIN LATE THIS AFTERNOON...CHANGING TO ALL SNOW THIS EVENING. SNOW SHOWERS ARE EXPECTED TONIGHT AND SATURDAY MORNING...BEFORE DECREASING LATE SATURDAY MORNING. * LOCATIONS INCLUDE: ALL ROADWAYS ABOVE 1000 FEET INCLUDING THE HIGHWAY 17 SUMMIT...SKYLINE BOULEVARD...AND HIGHWAY 152 TO PACHECO PASS. * IMPACTS: POTENTIAL FOR SIGNIFICANT TRAVEL IMPACTS WITH WIDESPREAD SNOWFALL ON MANY ROADWAYS LATE TONIGHT AND SATURDAY MORNING. LOCALLY BREEZY CONDITIONS WILL LIKELY LEAD TO AREAS OF BLOWING SNOW WITH VERY LOW VISIBILITIES. COLD TEMPERATURES WILL NOT ALLOW FOR RAPID MELTING. SNOW ON TREE BRANCHES COULD LEAD TO POWER OUTAGES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ MHS
5 follow-up statements
365 WWUS46 KMTR 251808 CCA WSWMTR URGENT - WINTER WEATHER MESSAGE...CORRECTED NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA 1005 AM PST FRI FEB 25 2011 CAZ517-260230- /O.UPG.KMTR.WW.Y.0002.110226T0000Z-110226T1800Z/ /O.NEW.KMTR.WS.W.0001.110226T0000Z-110227T0000Z/ SANTA LUCIA MOUNTAINS AND LOS PADRES NATIONAL FOREST- 1005 AM PST FRI FEB 25 2011 ...WINTER STORM WARNING IN EFFECT FROM 4 PM THIS AFTERNOON TO 4 PM PST SATURDAY... THE NATIONAL WEATHER SERVICE IN SAN FRANCISCO HAS ISSUED A WINTER STORM WARNING FOR SNOW...WHICH IS IN EFFECT FROM 4 PM THIS AFTERNOON TO 4 PM PST SATURDAY. THE WINTER WEATHER ADVISORY IS NO LONGER IN EFFECT. * SNOW ACCUMULATIONS: 7 TO 10 INCHES BELOW 3000 FEET. LOCALLY 12 INCHES OR MORE FOR ELEVATIONS ABOVE 3000 FEET. * ELEVATION: ABOVE 1000 FEET. * TIMING: SNOW WILL BEGIN TO MIX WITH RAIN LATE THIS AFTERNOON...CHANGING TO ALL SNOW THIS EVENING. SNOW SHOWERS COULD BE LOCALLY HEAVY TONIGHT AND SATURDAY...BEFORE DECREASING SATURDAY AFTERNOON. * LOCATIONS INCLUDE: ALL ROADWAYS ABOVE 1000 FEET INCLUDING LAURELES GRADE. * IMPACTS: POTENTIAL FOR SIGNIFICANT TRAVEL IMPACTS WITH WIDESPREAD SNOWFALL ON MANY ROADWAYS LATE TONIGHT AND SATURDAY. LOCALLY BREEZY CONDITIONS WILL LIKELY LEAD TO AREAS OF BLOWING SNOW WITH VERY LOW VISIBILITIES. COLD TEMPERATURES WILL NOT ALLOW FOR RAPID MELTING. SNOW ON TREE BRANCHES COULD LEAD TO POWER OUTAGES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW ARE EXPECTED OR OCCURRING. STRONG WINDS ARE ALSO POSSIBLE. THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$ CAZ516-528>530-260230- /O.EXA.KMTR.WW.Y.0002.110226T0000Z-110226T1800Z/ SOUTHERN SALINAS VALLEY...ARROYO SECO...AND LAKE SAN ANTONIO- NORTHERN SALINAS VALLEY...HOLLISTER VALLEY...AND CARMEL VALLEY- NORTHERN MONTEREY BAY-SOUTHERN MONTEREY BAY AND BIG SUR COAST- 1005 AM PST FRI FEB 25 2011 ...WINTER WEATHER ADVISORY IN EFFECT FROM 4 PM THIS AFTERNOON TO 10 AM PST SATURDAY ABOVE 500 FEET... THE NATIONAL WEATHER SERVICE IN SAN FRANCISCO HAS ISSUED A WINTER WEATHER ADVISORY FOR SNOW ABOVE 500 FEET...WHICH IS IN EFFECT FROM 4 PM THIS AFTERNOON TO 10 AM PST SATURDAY. * SNOW ACCUMULATIONS: LOCALLY UP TO 1 INCH ABOVE 500 FEET...LITTLE OR NO ACCUMULATION AT SEA LEVEL. * ELEVATION: SNOW COULD ACCUMULATE ABOVE 500 FEET. * TIMING: RAIN WILL TURN TO SHOWERS THIS AFTERNOON. SNOW WILL MIX WITH RAIN LATE THIS AFTERNOON AND EVENING. SNOW SHOWERS ARE LIKELY LATE TONIGHT AND SATURDAY MORNING WITH LIGHT ACCUMULATIONS POSSIBLE ABOVE 500 FEET. * LOCATIONS INCLUDE: ALL ROADWAYS ABOVE 500 FEET ALONG THE COAST AND IN THE SALINAS VALLEY. * IMPACTS: POTENTIAL FOR SIGNIFICANT TRAVEL IMPACTS WITH LOCAL SNOW ACCUMULATIONS ABOVE 500 FEET. SNOW ON TREE BRANCHES COULD LEAD TO POWER OUTAGES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ CAZ518-260230- /O.EXT.KMTR.WW.Y.0002.110226T0000Z-110227T0000Z/ MOUNTAINS OF SAN BENITO AND INTERIOR MONTEREY COUNTY INCLUDING PINNACLES NATIONAL MONUMENT- 1005 AM PST FRI FEB 25 2011 ...WINTER WEATHER ADVISORY NOW IN EFFECT FROM 4 PM THIS AFTERNOON TO 4 PM PST SATURDAY... THE WINTER WEATHER ADVISORY IS NOW IN EFFECT FROM 4 PM THIS AFTERNOON TO 4 PM PST SATURDAY. * SNOW ACCUMULATIONS: 4 TO 6 INCHES BELOW 3000 FEET. LOCALLY 6 INCHES OR MORE ABOVE 3000 FEET. * ELEVATION: ABOVE 1000 FEET. * TIMING: SNOW WILL BEGIN TO MIX WITH RAIN LATE THIS AFTERNOON...CHANGING TO ALL SNOW THIS EVENING. SNOW SHOWERS ARE EXPECTED TONIGHT AND SATURDAY...BEFORE DECREASING SATURDAY AFTERNOON. * LOCATIONS INCLUDE: ALL ROADWAYS ABOVE 1000 FEET INCLUDING PANOCHE PASS AND SHOTGUN PASS IN SAN BENITO COUNTY...THE BITTERWATER AREA IN SAN BENITO COUNTY...AND CALIFORNIA HIGHWAY 198 ALONG THE MONTEREY AND FRESNO COUNTY BORDER. * IMPACTS: POTENTIAL FOR SIGNIFICANT TRAVEL IMPACTS WITH WIDESPREAD SNOWFALL ON MANY ROADWAYS LATE TONIGHT AND SATURDAY. LOCALLY BREEZY CONDITIONS WILL LIKELY LEAD TO AREAS OF BLOWING SNOW WITH VERY LOW VISIBILITIES. COLD TEMPERATURES WILL NOT ALLOW FOR RAPID MELTING. SNOW ON TREE BRANCHES COULD LEAD TO POWER OUTAGES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ CAZ507-260000- /O.COR.KMTR.WW.Y.0002.000000T0000Z-110226T0000Z/ NORTH BAY MOUNTAINS- 1005 AM PST FRI FEB 25 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST THIS AFTERNOON... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST THIS AFTERNOON. * SNOW ACCUMULATIONS: 2 TO 4 INCHES BELOW 3000 FEET. 4 INCHES OR MORE FOR ELEVATIONS ABOVE 3000 FEET. * ELEVATION: ABOVE 1000 FEET. * TIMING: SNOW WILL MIX WITH RAIN THIS MORNING CHANGING TO ALL SNOW BY LATE MORNING. STEADY PRECIPITATION WILL CHANGE TO SNOW SHOWERS BY THIS AFTERNOON. * LOCATIONS INCLUDE: HIGHWAY 29 BETWEEN CALISTOGA AND MIDDLETOWN. ALL ROADWAYS ABOVE 1000 FEET IN SONOMA...NAPA AND MARIN COUNTIES. * IMPACTS: POTENTIAL FOR SIGNIFICANT TRAVEL IMPACTS WITH WIDESPREAD SNOWFALL ON MANY ROADWAYS BY THIS AFTERNOON. LOCALLY BREEZY CONDITIONS WILL LIKELY LEAD TO AREAS OF BLOWING SNOW WITH VERY LOW VISIBILITIES. COLD TEMPERATURES WILL NOT ALLOW FOR RAPID MELTING. SNOW ON TREE BRANCHES COULD LEAD TO POWER OUTAGES. * PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ CAZ511-512-260230- /O.COR.KMTR.WW.Y.0002.110226T0000Z-110226T1800Z/ EAST BAY HILLS AND DIABLO RANGE-SANTA CRUZ MOUNTAINS- 1005 AM PST FRI FEB 25 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 PM THIS AFTERNOON TO 10 AM PST SATURDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 PM THIS AFTERNOON TO 10 AM PST SATURDAY. * SNOW ACCUMULATIONS: 2 TO 4 INCHES BELOW 3000 FEET. LOCALLY 4 INCHES OR MORE ABOVE 3000 FEET. * ELEVATION: ABOVE 1000 FEET. * TIMING: SNOW WILL BEGIN TO MIX WITH RAIN LATE THIS AFTERNOON...CHANGING TO ALL SNOW THIS EVENING. SNOW SHOWERS ARE EXPECTED TONIGHT AND SATURDAY MORNING...BEFORE DECREASING LATE SATURDAY MORNING. * LOCATIONS INCLUDE: ALL ROADWAYS ABOVE 1000 FEET INCLUDING THE HIGHWAY 17 SUMMIT...SKYLINE BOULEVARD...AND HIGHWAY 152 TO PACHECO PASS. * IMPACTS: POTENTIAL FOR SIGNIFICANT TRAVEL IMPACTS WITH WIDESPREAD SNOWFALL ON MANY ROADWAYS LATE TONIGHT AND SATURDAY MORNING. LOCALLY BREEZY CONDITIONS WILL LIKELY LEAD TO AREAS OF BLOWING SNOW WITH VERY LOW VISIBILITIES. COLD TEMPERATURES WILL NOT ALLOW FOR RAPID MELTING. SNOW ON TREE BRANCHES COULD LEAD TO POWER OUTAGES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ MHS
601 WWUS46 KMTR 252013 WSWMTR URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA 1213 PM PST FRI FEB 25 2011 CAZ507-252115- /O.CAN.KMTR.WW.Y.0002.000000T0000Z-110226T0000Z/ NORTH BAY MOUNTAINS- 1213 PM PST FRI FEB 25 2011 ...WINTER WEATHER ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN SAN FRANCISCO HAS CANCELLED THE WINTER WEATHER ADVISORY FOR THE NORTH BAY MOUNTAINS. ALTHOUGH THERE COULD BE SNOW SHOWERS OCCURRING OVERNIGHT...ACCUMULATIONS ARE NOT EXPECTED TO WARRANT AN ADVISORY. $$ CAZ516-528>530-252115- /O.CAN.KMTR.WW.Y.0002.110226T0000Z-110226T1800Z/ SOUTHERN SALINAS VALLEY...ARROYO SECO...AND LAKE SAN ANTONIO- NORTHERN SALINAS VALLEY...HOLLISTER VALLEY...AND CARMEL VALLEY- NORTHERN MONTEREY BAY-SOUTHERN MONTEREY BAY AND BIG SUR COAST- 1213 PM PST FRI FEB 25 2011 ...WINTER WEATHER ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN SAN FRANCISCO HAS CANCELLED THE WINTER WEATHER ADVISORY FOR THE SALINAS VALLEY AND COASTAL SECTIONS OF THE MONTEREY BAY. ALTHOUGH THERE COULD BE SOME SNOW SHOWERS TONIGHT...LITTLE OR NO ACCUMULATION IS EXPECTED. $$ CAZ517-261200- /O.CON.KMTR.WS.W.0001.110226T0000Z-110227T0000Z/ SANTA LUCIA MOUNTAINS AND LOS PADRES NATIONAL FOREST- 1213 PM PST FRI FEB 25 2011 ...WINTER STORM WARNING REMAINS IN EFFECT FROM 4 PM THIS AFTERNOON TO 4 PM PST SATURDAY... A WINTER STORM WARNING REMAINS IN EFFECT FROM 4 PM THIS AFTERNOON TO 4 PM PST SATURDAY. * SNOW ACCUMULATIONS: 7 TO 10 INCHES BELOW 3000 FEET. LOCALLY 12 INCHES OR MORE FOR ELEVATIONS ABOVE 3000 FEET. * ELEVATION: ABOVE 2000 FEET. * TIMING: SNOW SHOWERS COULD BE LOCALLY HEAVY TONIGHT AND SATURDAY...BEFORE DECREASING SATURDAY AFTERNOON. * LOCATIONS INCLUDE: ALL ROADWAYS ABOVE 2000 FEET. * IMPACTS: POTENTIAL FOR SIGNIFICANT TRAVEL IMPACTS WITH WIDESPREAD SNOWFALL ON MANY ROADWAYS LATE TONIGHT AND SATURDAY. LOCALLY BREEZY CONDITIONS WILL COULD LEAD TO AREAS OF BLOWING SNOW WITH LOW VISIBILITIES. COLD TEMPERATURES WILL NOT ALLOW FOR RAPID MELTING. SNOW ON TREE BRANCHES COULD LEAD TO POWER OUTAGES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW ARE EXPECTED OR OCCURRING. STRONG WINDS ARE ALSO POSSIBLE. THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$ CAZ511-512-261200- /O.CON.KMTR.WW.Y.0002.110226T0000Z-110226T1800Z/ EAST BAY HILLS AND DIABLO RANGE-SANTA CRUZ MOUNTAINS- 1213 PM PST FRI FEB 25 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 PM THIS AFTERNOON TO 10 AM PST SATURDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 PM THIS AFTERNOON TO 10 AM PST SATURDAY. * SNOW ACCUMULATIONS: 2 TO 4 INCHES BELOW 3000 FEET. LOCALLY 4 INCHES OR MORE ABOVE 3000 FEET. * ELEVATION: ABOVE 1000 FEET. * TIMING: SNOW SHOWERS ARE EXPECTED TONIGHT AND SATURDAY MORNING...BEFORE DECREASING LATE SATURDAY MORNING. * LOCATIONS INCLUDE: ALL ROADWAYS ABOVE 1000 FEET INCLUDING THE HIGHWAY 17 SUMMIT...SKYLINE BOULEVARD...AND HIGHWAY 152 TO PACHECO PASS. * IMPACTS: POTENTIAL FOR SIGNIFICANT TRAVEL IMPACTS WITH SNOWFALL ON AREA ROADWAYS LATE TONIGHT AND SATURDAY MORNING. LOCALLY BREEZY CONDITIONS MAY LEAD TO AREAS OF BLOWING SNOW WITH LOW VISIBILITIES. COLD TEMPERATURES WILL NOT ALLOW FOR RAPID MELTING. SNOW ON TREE BRANCHES COULD LEAD TO POWER OUTAGES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ CAZ518-261200- /O.CON.KMTR.WW.Y.0002.110226T0000Z-110227T0000Z/ MOUNTAINS OF SAN BENITO AND INTERIOR MONTEREY COUNTY INCLUDING PINNACLES NATIONAL MONUMENT- 1213 PM PST FRI FEB 25 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 PM THIS AFTERNOON TO 4 PM PST SATURDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT FROM 4 PM THIS AFTERNOON TO 4 PM PST SATURDAY. * SNOW ACCUMULATIONS: 4 TO 6 INCHES BELOW 3000 FEET. LOCALLY 6 INCHES OR MORE ABOVE 3000 FEET. * ELEVATION: ABOVE 1000 FEET. * TIMING: SNOW SHOWERS ARE EXPECTED TONIGHT AND SATURDAY...AND WILL DECREASE BY SATURDAY AFTERNOON. * LOCATIONS INCLUDE: ALL ROADWAYS ABOVE 1000 FEET INCLUDING PANOCHE PASS AND SHOTGUN PASS IN SAN BENITO COUNTY...THE BITTERWATER AREA IN SAN BENITO COUNTY...AND CALIFORNIA HIGHWAY 198 ALONG THE MONTEREY AND FRESNO COUNTY BORDER. * IMPACTS: POTENTIAL FOR SIGNIFICANT TRAVEL IMPACTS WITH AREAS OF SNOWFALL ON ROADWAYS LATE TONIGHT AND SATURDAY. LOCALLY BREEZY CONDITIONS COULD LEAD O AREAS OF BLOWING SNOW WITH LOW VISIBILITIES. COLD TEMPERATURES WILL NOT ALLOW FOR RAPID MELTING. SNOW ON TREE BRANCHES COULD LEAD TO POWER OUTAGES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$
186 WWUS46 KMTR 260518 WSWMTR URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA 918 PM PST FRI FEB 25 2011 CAZ511-260630- /O.CAN.KMTR.WW.Y.0002.000000T0000Z-110226T1800Z/ EAST BAY HILLS AND DIABLO RANGE- 918 PM PST FRI FEB 25 2011 ...WINTER WEATHER ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA HAS CANCELLED THE WINTER WEATHER ADVISORY. ONLY ISOLATED SNOW SHOWERS ARE FORECAST OVERNIGHT AND INTO SATURDAY MORNING. LITTLE ADDITIONAL SNOW ACCUMULATION IS EXPECTED. $$ CAZ517-261400- /O.CON.KMTR.WS.W.0001.000000T0000Z-110227T0000Z/ SANTA LUCIA MOUNTAINS AND LOS PADRES NATIONAL FOREST- 918 PM PST FRI FEB 25 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 PM PST SATURDAY... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 PM PST SATURDAY FOR THE SANTA LUCIA MOUNTAINS AND LOS PADRES NATIONAL FOREST. * ADDITIONAL SNOW ACCUMULATIONS: 1 TO 4 INCHES. TOTAL SNOW ACCUMULATIONS: 7 TO 10 INCHES BELOW 3000 FEET. LOCALLY 12 INCHES OR MORE FOR ELEVATIONS ABOVE 3000 FEET. * ELEVATION: ABOVE 2000 FEET. * TIMING: SNOW SHOWERS COULD BE LOCALLY HEAVY TONIGHT AND SATURDAY...BEFORE DECREASING LATE SATURDAY AFTERNOON. * LOCATIONS INCLUDE: ALL ROADWAYS ABOVE 2000 FEET. * IMPACTS: POTENTIAL FOR SIGNIFICANT TRAVEL IMPACTS WITH WIDESPREAD SNOWFALL ON MANY ROADWAYS TONIGHT AND SATURDAY. COLD TEMPERATURES WILL NOT ALLOW FOR MELTING ON SATURDAY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW ARE EXPECTED OR OCCURRING. THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$ CAZ512-261400- /O.CON.KMTR.WW.Y.0002.000000T0000Z-110226T1800Z/ SANTA CRUZ MOUNTAINS- 918 PM PST FRI FEB 25 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST SATURDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST SATURDAY FOR THE SANTA CRUZ MOUNTAINS. * ADDITIONAL SNOW ACCUMULATIONS: 1 TO 2 INCHES. TOTAL SNOW ACCUMULATIONS: 2 TO 4 INCHES BELOW 3000 FEET. LOCALLY 4 INCHES OR MORE ABOVE 3000 FEET. * ELEVATION: ABOVE 1000 FEET. * TIMING: SNOW SHOWERS ARE EXPECTED TONIGHT AND SATURDAY MORNING...BEFORE DECREASING LATE SATURDAY MORNING. * LOCATIONS INCLUDE: ALL ROADWAYS ABOVE 1000 FEET INCLUDING THE HIGHWAY 17 SUMMIT AND SKYLINE BOULEVARD. * IMPACTS: POTENTIAL FOR SIGNIFICANT TRAVEL IMPACTS WITH SNOWFALL ON AREA ROADWAYS LATE TONIGHT AND SATURDAY MORNING. COLD TEMPERATURES WILL NOT ALLOW FOR RAPID MELTING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ CAZ518-261400- /O.CON.KMTR.WW.Y.0002.000000T0000Z-110227T0000Z/ MOUNTAINS OF SAN BENITO AND INTERIOR MONTEREY COUNTY INCLUDING PINNACLES NATIONAL MONUMENT- 918 PM PST FRI FEB 25 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST SATURDAY... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST SATURDAY FOR THE MOUNTAINS OF SAN BENITO COUNTY AS WELL AS THE MOUNTAINS OF INTERIOR MONTEREY COUNTY. * ADDITIONAL SNOW ACCUMULATIONS: 1 TO 3 INCHES. TOTAL SNOW ACCUMULATIONS: 4 TO 6 INCHES BELOW 3000 FEET. LOCALLY 6 INCHES OR MORE ABOVE 3000 FEET. * ELEVATION: ABOVE 1000 FEET. * TIMING: SNOW SHOWERS ARE EXPECTED TONIGHT AND SATURDAY...AND WILL DECREASE BY SATURDAY AFTERNOON. * LOCATIONS INCLUDE: ALL ROADWAYS ABOVE 1000 FEET INCLUDING PANOCHE PASS AND SHOTGUN PASS IN SAN BENITO COUNTY...THE BITTERWATER AREA IN SAN BENITO COUNTY...AND CALIFORNIA HIGHWAY 198 ALONG THE MONTEREY AND FRESNO COUNTY BORDER. * IMPACTS: POTENTIAL FOR SIGNIFICANT TRAVEL IMPACTS WITH AREAS OF SNOWFALL ON ROADWAYS LATE TONIGHT AND SATURDAY. COLD TEMPERATURES WILL NOT ALLOW FOR RAPID MELTING. SNOW ON TREE BRANCHES COULD LEAD TO POWER OUTAGES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$
445 WWUS46 KMTR 261350 WSWMTR URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA 550 AM PST SAT FEB 26 2011 CAZ517-262000- /O.CON.KMTR.WS.W.0001.000000T0000Z-110227T0000Z/ SANTA LUCIA MOUNTAINS AND LOS PADRES NATIONAL FOREST- 550 AM PST SAT FEB 26 2011 ...WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 PM PST THIS AFTERNOON... A WINTER STORM WARNING REMAINS IN EFFECT UNTIL 4 PM PST THIS AFTERNOON. * ADDITIONAL SNOW ACCUMULATIONS: 2 TO 4 INCHES. TOTAL SNOW ACCUMULATIONS: 7 TO 10 INCHES BELOW 3000 FEET. LOCALLY 12 INCHES OR MORE FOR ELEVATIONS ABOVE 3000 FEET. * ELEVATION: ABOVE 1500 FEET. * TIMING: SNOW SHOWERS COULD BE LOCALLY HEAVY SATURDAY...BEFORE DECREASING LATE SATURDAY AFTERNOON. * LOCATIONS INCLUDE: ALL ROADWAYS ABOVE 1500 FEET. * IMPACTS: POTENTIAL FOR SIGNIFICANT TRAVEL IMPACTS WITH WIDESPREAD SNOWFALL ON MANY ROADWAYS ON SATURDAY. COLD TEMPERATURES WILL NOT ALLOW FOR MELTING ON SATURDAY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER STORM WARNING MEANS SIGNIFICANT AMOUNTS OF SNOW ARE EXPECTED OR OCCURRING. THIS WILL MAKE TRAVEL VERY HAZARDOUS OR IMPOSSIBLE. && $$ CAZ512-261800- /O.CON.KMTR.WW.Y.0002.000000T0000Z-110226T1800Z/ SANTA CRUZ MOUNTAINS- 550 AM PST SAT FEB 26 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS MORNING... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 10 AM PST THIS MORNING. * ADDITIONAL SNOW ACCUMULATIONS: UP TO 1 INCH. TOTAL SNOW ACCUMULATIONS: 2 TO 4 INCHES BELOW 3000 FEET. LOCALLY 4 INCHES OR MORE ABOVE 3000 FEET. * ELEVATION: ABOVE 1000 FEET. * TIMING: SNOW SHOWERS ARE EXPECTED SATURDAY MORNING...BEFORE DECREASING LATE SATURDAY MORNING. * LOCATIONS INCLUDE: ALL ROADWAYS ABOVE 1000 FEET INCLUDING THE HIGHWAY 17 SUMMIT AND SKYLINE BOULEVARD. * IMPACTS: POTENTIAL FOR SIGNIFICANT TRAVEL IMPACTS WITH SNOWFALL ON AREA ROADWAYS SATURDAY MORNING. COLD TEMPERATURES WILL NOT ALLOW FOR RAPID MELTING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW...SLEET...OR FREEZING RAIN WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ CAZ518-262000- /O.CON.KMTR.WW.Y.0002.000000T0000Z-110227T0000Z/ MOUNTAINS OF SAN BENITO AND INTERIOR MONTEREY COUNTY INCLUDING PINNACLES NATIONAL MONUMENT- 550 AM PST SAT FEB 26 2011 ...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST THIS AFTERNOON... A WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 4 PM PST THIS AFTERNOON. * ADDITIONAL SNOW ACCUMULATIONS: 1 TO 2 INCHES. TOTAL SNOW ACCUMULATIONS: 4 TO 6 INCHES BELOW 3000 FEET. LOCALLY 6 INCHES OR MORE ABOVE 3000 FEET. * ELEVATION: ABOVE 1000 FEET. * TIMING: SNOW SHOWERS ARE EXPECTED SATURDAY...AND WILL DECREASE BY SATURDAY AFTERNOON. * LOCATIONS INCLUDE: ALL ROADWAYS ABOVE 1000 FEET INCLUDING PANOCHE PASS AND SHOTGUN PASS IN SAN BENITO COUNTY...THE BITTERWATER AREA IN SAN BENITO COUNTY...AND CALIFORNIA HIGHWAY 198 ALONG THE MONTEREY AND FRESNO COUNTY BORDER. * IMPACTS: POTENTIAL FOR SIGNIFICANT TRAVEL IMPACTS WITH AREAS OF SNOWFALL ON ROADWAYS SATURDAY. COLD TEMPERATURES WILL NOT ALLOW FOR RAPID MELTING. PRECAUTIONARY/PREPAREDNESS ACTIONS... A WINTER WEATHER ADVISORY MEANS THAT PERIODS OF SNOW WILL CAUSE TRAVEL DIFFICULTIES. BE PREPARED FOR SLIPPERY ROADS AND LIMITED VISIBILITIES...AND USE CAUTION WHILE DRIVING. && $$ MHS
493 WWUS46 KMTR 261637 WSWMTR URGENT - WINTER WEATHER MESSAGE NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA 837 AM PST SAT FEB 26 2011 CAZ517-261745- /O.CAN.KMTR.WS.W.0001.000000T0000Z-110227T0000Z/ SANTA LUCIA MOUNTAINS AND LOS PADRES NATIONAL FOREST- 837 AM PST SAT FEB 26 2011 ...WINTER STORM WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN SAN FRANCISCO HAS CANCELLED THE WINTER STORM WARNING FOR THE SANTA LUCIA MOUNTAINS AND LOS PADRES NATIONAL FOREST. SCATTERED SHOWERS OR SNOW SHOWERS THIS MORNING ACROSS THE AREA WILL DECREASE BY AFTERNOON. $$ CAZ512-261745- /O.CAN.KMTR.WW.Y.0002.000000T0000Z-110226T1800Z/ SANTA CRUZ MOUNTAINS- 837 AM PST SAT FEB 26 2011 ...WINTER WEATHER ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN SAN FRANCISCO HAS CANCELLED THE WINTER WEATHER ADVISORY FOR THE SANTA CRUZ MOUNTAINS. A FEW LINGERING SHOWERS THIS MORNING COULD CONTAIN SNOW OR SNOW PELLETS...HOWEVER. SHOWERS WILL END BY AFTERNOON. $$ CAZ518-261745- /O.CAN.KMTR.WW.Y.0002.000000T0000Z-110227T0000Z/ MOUNTAINS OF SAN BENITO AND INTERIOR MONTEREY COUNTY INCLUDING PINNACLES NATIONAL MONUMENT- 837 AM PST SAT FEB 26 2011 ...WINTER WEATHER ADVISORY IS CANCELLED... THE NATIONAL WEATHER SERVICE IN SAN FRANCISCO HAS CANCELLED THE WINTER WEATHER ADVISORY FOR THE MOUNTAINS OF SAN BENITO AND INTERIOR MONTEREY COUNTY. SHOWER ACTIVITY HAS ENDED. $$
What forecasters said that day
The local office's own words before this winter storm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS San Francisco Bay Area, CA wrote its last area forecast discussion before this winter storm warning went out at Feb 24, 9:57 PM PST, 5 hours 55 minutes earlier.
Area forecast discussion, Feb 24, 9:57 PM PST, 5 hours 55 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA
957 PM PST THU FEB 24 2011
...COLD WINTER STORM TO IMPACT OUR AREA BEGINNING TONIGHT...
...VERY COLD TEMPERATURES EXPECTED BOTH EARLY SATURDAY MORNING AND
SUNDAY MORNING...
.DISCUSSION...AS OF 8:31 PM PST THURSDAY...RAIN HAS SPREAD AS FAR
SOUTH AS THE MONTEREY BAY WITH 6-HOURLY RAINFALL AMOUNTS RANGING
FROM A FEW HUNDREDTHS IN SANTA CLARA COUNTY TO NEARLY A HALF INCH IN
SAN MATEO COUNTY. THIS PRECIP IS ASSOCIATED WITH THE LEADING EDGE OF
THE SYSTEM...AS THE COLD CORE UPPER LOW CENTER IS NOW LOCATED ABOUT
280 MILES WEST OF PORTLAND...AND IT IS MOVING SOUTH. THE MAIN
PRECIPITATION BAND IS FORECAST TO MOVE ACROSS THE NORTH BAY TONIGHT
AND REACH THE BAY AREA BY MORNING...AND SPREAD SOUTH THROUGH THE
REST OF THE CWA DURING THE MORNING. THE COLD AIR IS BEHIND THE
FRONT...AND AS THIS COLD AIR ALOFT MIXES DOWN...SNOW LEVELS WILL
FALL. THEY ARE FORECAST TO FALL DOWN TO 1000 TO 1500 FEET IN THE
NORTHBAY MOUNTAINS OVERNIGHT...AND LOWER TO NEAR SEA LEVEL BY
TOMORROW NIGHT AND SATURDAY MORNING. THE QUESTION REMAINS...HOW MUCH
MOISTURE WILL BE LEFT BY THE TIME THE COLD AIR SETS IN. ALTHOUGH THE
BULK OF THE MOISTURE IS EXPECTED TO OCCUR DURING THE EARLY PART OF
THE SYSTEM...ENOUGH FOR SMALL AMOUNTS OF SNOW AT LOW ELEVATIONS IS
POSSIBLE...EVEN SAN FRANCISCO.
A WINTER WEATHER ADVISORIES ARE IN EFFECT FOR THE NORTH BAY
MOUNTAINS TONIGHT THROUGH 4 PM FRIDAY...AND FOR THE SANTA CRUZ...EAST
BAY MOUNTAINS AND SANTA LUCIAS BEGINNING FRIDAY AFTERNOON THROUGH
SATURDAY MORNING.
THE COLD AIR WILL REMAIN IN PLACE AFTER THIS STORM SYSTEM MOVES
THROUGH. THIS WILL CAUSE FREEZING OR SUB-FREEZING TEMPERATURES
FRIDAY NIGHT IN THE NORTH BAY AND AGAIN SATURDAY NIGHT ACROSS MANY
AREAS IN OUR CWA. A FREEZE WATCH IS IN EFFECT FOR THE NORTH BAY
VALLEYS FOR FRIDAY NIGHT...AND THIS WILL LIKELY NEED TO BE EXPANDED
TO INCLUDE MORE AREAS FOR SATURDAY NIGHT.
SUNDAY AND MONDAY NOW LOOK DRY WITH A BIT OF A WARMING TREND. THE
LATEST RUN OF THE GFS KEEPS DRY CONDITIONS THROUGH TUESDAY AS WELL
BEFORE THE NEXT SYSTEM SPREADS RAIN ACROSS THE CWA ON WEDNESDAY.
&&
.AVIATION...AS OF 9:55 PM THURSDAY...CIGS WILL LOWER AND RAIN WILL
INCREASE OVERNIGHT AS A COLD WEATHER SYSTEM APPROACHES FROM THE
NORTH. SOUTHERLY WINDS WILL INCREASE THROUGH THE NIGHT AHEAD OF THE
FRONTAL PASSAGE THEN VEER TO THE WEST ON FRIDAY MORNING AFTER FRONTAL
PASSAGE. CEILINGS AND WIND DIRECTION ARE DEPENDENT ON THE TIMING OF
THE FRONT. CONFIDENCE IS MODERATE ON TIMING. CIGS WILL BREAK UP ON
FRIDAY AFTERNOON AND POST-FRONTAL SHOWER ACTIVITY WILL MOSTLY END BY
LATE IN THE DAY.
VICINITY OF KSFO...MVFR CIGS WILL CONTINUE THROUGH MIDDAY FRIDAY
ALONG WITH PERIODS OF RAIN. SOUTHERLY WINDS WILL STRENGTHEN TONIGHT
AHEAD OF THE FRONT BEFORE VEERING TO THE SOUTHWEST BY MID MORNING
FRIDAY...AND THEN TO THE WEST BY EARLY FRIDAY AFTERNOON. WIND SPEEDS
WILL GENERALLY BE AROUND 15 KNOTS LATE TONIGHT AND FRIDAY MORNING...
AND UP TO 20 KNOTS ON FRIDAY AFTERNOON WITH HIGHER GUSTS. CONDITIONS
WILL IMPROVE FRIDAY AFTERNOON WITH CIGS BREAKING UP AND POST-FRONTAL
SHOWER ACTIVITY TAPERING OFF.
KSFO BRIDGE APPROACH...SIMILAR TO KSFO.
MONTEREY BAY AREA TERMINALS...VFR CIGS ARE EXPECTED THROUGH LATE
EVENING...LOWERING TO MVFR CIGS OVERNIGHT AS PRECIPITATION INCREASES.
SOUTHERLY WINDS WILL INCREASE LATE TONIGHT AND FRIDAY MORNING. CIGS
WILL BREAK UP...WINDS WILL VEER TO THE SOUTHWEST...AND PRECIP WILL
TURN SHOWERY BY EARLY FRIDAY AFTERNOON AFTER FRONTAL PASSAGE.
&&
.CLIMATE...HERE ARE RECORD LOW TEMPERATURES FOR SELECTED LOCATIONS
FOR FEBRUARY 26TH (SATURDAY) AND FEBRUARY 27TH (SUNDAY)
SAN FRANCISCO BAY AREA
.LOCATION...................FEB 26........FEB 27
SANTA ROSA................21/1913.......24/1962
SAN RAFAEL................32/1996.......29/1962
NAPA......................30/1945.......29/1942
SAN FRANCISCO.............37/1962.......38/1962
KSFO......................36/1971.......32/1951
OAKLAND...................38/1987.......39/2007
KOAK......................34/1962.......31/1962
RICHMOND..................35/1962.......34/1962
LIVERMORE.................26/1987.......25/1962
SAN JOSE..................33/1897.......28/1893
GILROY....................29/1971.......24/1962
MONTEREY BAY AREA
.LOCATION...................FEB 26........FEB 27
MONTEREY..................34/1971.......27/1962
SANTA CRUZ................30/1964.......25/1962
SALINAS...................28/1971.......25/1962
KSNS......................28/1935.......29/1962
KING CITY.................25/1964.......23/1962
&&
.MTR WATCHES/WARNINGS/ADVISORIES...
.TNGT...WINTER WEATHER ADV NORTH BAY HILLS ABOVE 1000 FEET
...SCA...PIGEON POINT TO PT PIEDRAS BLANCAS 0-60 NM.
&&
PUBLIC FORECAST: SS
AVIATION: DYKEMA
CLIMATE: DH/BELL/DYKEMAHazardous weather outlook, Feb 24, 3:00 PM PST, 12 hours 52 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA CA 300 PM PST THU FEB 24 2011 CAZ506-251100- NORTH BAY INTERIOR VALLEYS- 300 PM PST THU FEB 24 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH BAY VALLEYS IN THE SAN FRANCISCO BAY AREA. .DAY ONE...THURSDAY NIGHT RAIN WILL CONTINUE TO INCREASE IN AREAL COVERAGE AND INTENSITY OVERNIGHT AS A STRONG COLD FRONT MOVES INTO NORTHERN CALIFORNIA. TEMPERATURES WILL REMAIN FAIRLY STEADY IN THE 40S...FALLING TO THE UPPER 30S BY SUNRISE FRIDAY. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY PERIODS OF RAIN WILL TURN TO SHOWERS ON FRIDAY AS COLD AIR SPREADS OVER THE REGION. ITS POSSIBLE THAT A RAIN AND SNOW MIX WILL DEVELOP WITH SNOW LEVELS FALLING TO BETWEEN 500 AND 1000 FEET...ESPECIALLY IN ANY OF THE STRONGER CONVECTIVE SHOWERS ON FRIDAY AND FRIDAY NIGHT. UNSEASONABLY COLD AIR WILL OVERSPREAD THE NORTH BAY VALLEYS BY FRIDAY NIGHT INTO SATURDAY. THEREFORE A FREEZE WATCH HAS BEEN ISSUED FOR THE NORTH BAY VALLEYS FOR FRIDAY NIGHT INTO SATURDAY MORNING. THIS WILL LIKELY BE UPGRADED TO A FREEZE WARNING. EVEN COLDER TEMPERATURES ARE EXPECTED SATURDAY NIGHT INTO SUNDAY MORNING. * PLEASE SEE SFONPWMTR WWUS76 WEATHER MESSAGE FOR MORE DETAILS * .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS PER STANDARD OPERATING PROCEDURES. CAZ511-512-517-518-251100- SANTA LUCIA MOUNTAINS AND LOS PADRES NATIONAL FOREST- MOUNTAINS OF SAN BENITO COUNTY AND INTERIOR MONTEREY COUNTY INCLUDING PINNACLES NATIONAL MONUMENT- EAST BAY HILLS AND THE DIABLO RANGE-SANTA CRUZ MOUNTAINS- 300 PM PST THU FEB 24 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR ELEVATIONS ABOVE 1000 FEET IN THE SAN FRANCISCO BAY AREA AND MONTEREY BAY AREA EXCLUDING THE NORTH BAY MOUNTAINS. .DAY ONE...THURSDAY NIGHT SNOW AND RAIN WILL SPREAD ACROSS THE HILLS TONIGHT. SNOW LEVEL WILL START OUT AROUND 3000 FEET THIS EVENING...THEN LOWER TO AROUND 2000 FEET BY SUNRISE FRIDAY. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY A WINTER WEATHER ADVISORY WILL GO INTO EFFECT FROM 4 PM FRIDAY THROUGH 10 AM SATURDAY FOR SNOW...WIND AND VERY COLD TEMPERATURES FOR THE HILLS ABOVE 1000 FEET. * PLEASE SEE SFOWSWMTR WWUS46 WINTER WEATHER MESSAGE FOR MORE DETAILS * ACCUMULATING SNOW IS LIKELY ABOVE 1500 TO 2000 FEET WITH SOME ACCUMULATIONS POSSIBLE AT THE 1000 FOOT LEVEL. ANY SNOW COVERED ROADS WILL BECOME HAZARDOUS VERY QUICKLY. THE COLD TEMPERATURES ON FRIDAY NIGHT WILL NOT ALLOW FOR ANY MELTING AND ANY SHOWERS ON FRIDAY NIGHT AND SATURDAY WILL ALMOST CERTAINLY FALL AS SNOW ABOVE 1000 FEET. SNOW SHOWERS WILL END ON SATURDAY BUT VERY COLD TEMPERATURES WILL CONTINUE THROUGH SUNDAY MORNING. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS PER STANDARD OPERATING PROCEDURES. CAZ006-505-508>510-513-516-528>530-251100- SOUTHERN SALINAS VALLEY...ARROYO SECO...AND LAKE SAN ANTONIO- SAN FRANCISCO- COASTAL NORTH BAY...INCLUDING POINT REYES NATIONAL SEASHORE- SAN FRANCISCO BAY SHORELINE-EAST BAY INTERIOR VALLEYS- SAN FRANCISCO PENINSULA COAST- NORTHERN SALINAS VALLEY...HOLLISTER VALLEY...AND CARMEL VALLEY- SOUTHERN MONTEREY BAY AND BIG SUR COAST-NORTHERN MONTEREY BAY- SANTA CLARA VALLEY...INCLUDING SAN JOSE- 300 PM PST THU FEB 24 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE VALLEYS BELOW 1000 FEET IN THE SAN FRANCISCO BAY AREA AND MONTEREY BAY AREA. .DAY ONE...THURSDAY NIGHT RAIN WILL INCREASE FROM NORTH TO SOUTH TONIGHT ACROSS THE BAY AREA. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY RAIN WILL TURN TO SHOWERS ON FRIDAY WITH VERY COLD AIR OVERSPREADING THE BAY AREA. ITS POSSIBLE THAT RAIN AND SNOW WILL MIX DOWN TO AROUND 500 FEET IN ANY HEAVIER SHOWERS. BY FRIDAY NIGHT VERY COLD TEMPERATURES ARE FORECAST...EVEN IN THE VALLEYS WITH SOME SNOW SHOWERS POSSIBLE ESPECIALLY FOR LOCATIONS ALONG THE COAST AND SOUTH OF SAN FRANCISCO. SOME OF THE COLDEST AIR OF THE SEASON IS FORECAST FOR SATURDAY MORNING THROUGH SUNDAY MORNING. A FREEZE WATCH MAY BE ISSUED FOR THIS EVENT AS IT GETS CLOSER. THIS COLD SNAP WILL BE POTENTIALLY LIFE THREATENING FOR THE HOMELESS AND OTHERS THAT HAVE TO SPEND EXTENSIVE AMOUNTS OF TIME OUTSIDE THROUGH SUNDAY MORNING. .SPOTTER INFORMATION STATEMENT... WEATHER SPOTTERS ARE ENCOURAGED TO REPORT SIGNIFICANT WEATHER CONDITIONS PER STANDARD OPERATING PROCEDURES. CAZ507-251100- NORTH BAY MOUNTAINS- 300 PM PST THU FEB 24 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE NORTH BAY MOUNTAINS. .DAY ONE...THURSDAY NIGHT RAIN AND LOW ELEVATION SNOW WILL INCREASE IN COVERAGE AND INTENSITY TONIGHT. SNOW LEVELS CURRENTLY AROUND 3000 FEET WILL LOWER OVERNIGHT INTO FRIDAY MORNING. A WINTER WEATHER ADVISORY IS IN EFFECT UNTIL 4 PM FRIDAY FOR ACCUMULATING SNOWFALL...WIND AND COLD TEMPERATURES. * PLEASE SEE SFOWSWMTR WWUS46 WINTER WEATHER MESSAGE FOR MORE DETAILS * .DAY TOWN THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY THE WINTER WEATHER ADVISORY WILL CONTINUE THROUGH 4 PM FRIDAY. VERY COLD TEMPERATURES WILL CONTINUE FRIDAY NIGHT INTO SATURDAY WITH SOME LINGERING SNOW SHOWERS IN THE HILLS. THE VERY COLD WEATHER WILL THEN CONTINUE SATURDAY THROUGH SUNDAY MORNING BEFORE TEMPERATURES FINALLY BEGIN TO MODERATE.
The office that day
Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 25, 3:10 AM PST | Freeze Warning | MTR | Marin, Napa, Sonoma | 29 hr |
| Feb 25, 7:30 AM PST | Areal Flood Advisory | MTR | Alameda, Contra Costa, Monterey, San Benito, City and County of San Francisco, San Mateo and 2 more | 75 min |
| Feb 25, 8:40 AM PST | Areal Flood Advisory | MTR | Monterey, San Benito, Santa Clara, Santa Cruz | 65 min |
| Feb 25, 9:56 AM PST | Areal Flood Advisory | MTR | Monterey, San Benito, Santa Clara | 49 min |
Nearby
Winter Storm Warnings in California, 2011Every winter storm warning in 2011
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.