Alert archive / California / Freeze Warnings in 2012
Freeze Warning 2, NWS San Francisco Bay Area, CA
NWS San Francisco Bay Area, CA issued this freeze warning at Jan 17, 2012, 3:22 AM PST for Monterey County, San Benito County, Santa Clara County, California. It took effect at Jan 17, 2012, 11:00 PM PST. It was in force for 10 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
- Jan 17, 2012, 3:22 AM PST (11:22 UTC)
- In effect from
- Jan 17, 2012, 11:00 PM PST
- Expired
- Jan 18, 2012, 9:00 AM PST
- In force
- 10 hr
- Issued by
- NWS San Francisco Bay Area, CA
Counties Monterey County, CA, San Benito County, CA, Santa Clara County, CA
The radar
The San Francisco radar (KMUX), 70 km from the middle of the area, began a volume at 11:26 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
Oakland, CA (KOAK), launched 00:00Z, 11.4 hours before the alert went out and 137 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
- 2551 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- -67 m²/s²
- 0-3 km storm-relative helicity
- 24 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
728 WWUS76 KMTR 171123 NPWMTR URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA 322 AM PST TUE JAN 17 2012 ...COLD TEMPERATURES IN STORE FOR THE SAN FRANCISCO BAY AREA THIS MORNING PLUS TONIGHT INTO WEDNESDAY MORNING... .CLEAR SKIES AND LIGHT WINDS WILL ALLOW FOR PROLONGED SUB- FREEZING TEMPERATURES TO OCCUR BOTH THIS MORNING AND TONIGHT INTO WEDNESDAY MORNING FOR PORTIONS OF THE SAN FRANCISCO AND MONTEREY BAY REGION. CAZ516-171600- /O.UPG.KMTR.FZ.A.0002.120118T0700Z-120118T1600Z/ /O.NEW.KMTR.FZ.W.0002.120118T0700Z-120118T1600Z/ /O.CON.KMTR.FZ.W.0001.000000T0000Z-120117T1600Z/ SOUTHERN SALINAS VALLEY...ARROYO SECO...AND LAKE SAN ANTONIO- 322 AM PST TUE JAN 17 2012 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 8 AM PST THIS MORNING... ...FREEZE WARNING IN EFFECT FROM 11 PM THIS EVENING TO 8 AM PST WEDNESDAY... * * TEMPERATURES: LOWS WILL BE IN THE 20S BOTH THIS MORNING AND TONIGHT INTO WEDNESDAY MORNING. * IMPACTS: AREAS OF BLACK ICE MAY ALSO BE POSSIBLE ESPECIALLY ON BRIDGES AND OVER PASSES. SENSITIVE VEGETATION COULD BE KILLED BY THE COLD TEMPERATURES. PLEASE TAKE OUTDOOR PETS INTO CONSIDERATION DURING THESE COLD TEMPERATURES. * PRECAUTIONARY/PREPAREDNESS ACTIONS... A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER SENSITIVE VEGETATION. && $$ CAZ513-528-171600- /O.NEW.KMTR.FZ.W.0002.120118T0700Z-120118T1600Z/ /O.CON.KMTR.FZ.W.0001.000000T0000Z-120117T1600Z/ SANTA CLARA VALLEY...INCLUDING SAN JOSE- NORTHERN SALINAS VALLEY...HOLLISTER VALLEY...AND CARMEL VALLEY- 322 AM PST TUE JAN 17 2012 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 8 AM PST THIS MORNING... ...FREEZE WARNING IN EFFECT FROM 11 PM THIS EVENING TO 8 AM PST WEDNESDAY... * TEMPERATURES: LOWS WILL BE IN THE 2OS TO LOWER 302 THIS MORNING WITH MID 20S TO MID 30S EXPECTED TONIGHT INTO WEDNESDAY MORNING. * IMPACTS: AREAS OF BLACK ICE MAY ALSO BE POSSIBLE ESPECIALLY ON BRIDGES AND OVER PASSES. SENSITIVE VEGETATION COULD BE KILLED BY THE COLD TEMPERATURES.PLEASE TAKE OUTDOOR PETS INTO CONSIDERATION DURING THESE COLD TEMPERATURES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER SENSITIVE VEGETATION. && $$ CAZ506>508-510-529-530-171600- /O.CON.KMTR.FZ.W.0001.000000T0000Z-120117T1600Z/ NORTH BAY INTERIOR VALLEYS-NORTH BAY MOUNTAINS- SAN FRANCISCO BAY SHORELINE-EAST BAY INTERIOR VALLEYS- NORTHERN MONTEREY BAY-SOUTHERN MONTEREY BAY AND BIG SUR COAST- 322 AM PST TUE JAN 17 2012 ...FREEZE WARNING REMAINS IN EFFECT UNTIL 8 AM PST THIS MORNING... * TEMPERATURES: 25 TO 35 DEGREES THIS MORNING. * IMPACTS: AREAS OF BLACK ICE MAY ALSO BE POSSIBLE ESPECIALLY ON BRIDGES AND OVER PASSES. SENSITIVE VEGETATION COULD BE KILLED BY THE COLD TEMPERATURES.PLEASE TAKE OUTDOOR PETS INTO CONSIDERATION DURING THESE COLD TEMPERATURES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER SENSITIVE VEGETATION. && $$
3 follow-up statements
113 WWUS76 KMTR 171558 NPWMTR URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA 758 AM PST TUE JAN 17 2012 .CLEAR SKIES AND LIGHT WINDS WILL ALLOW FOR PROLONGED SUB- FREEZING TEMPERATURES TO OCCUR AGAIN TONIGHT INTO WEDNESDAY MORNING FOR PORTIONS OF THE SAN FRANCISCO AND MONTEREY BAY REGION. CAZ513-516-528-180100- /O.EXP.KMTR.FZ.W.0001.000000T0000Z-120117T1600Z/ /O.CON.KMTR.FZ.W.0002.120118T0700Z-120118T1600Z/ SANTA CLARA VALLEY...INCLUDING SAN JOSE- SOUTHERN SALINAS VALLEY...ARROYO SECO...AND LAKE SAN ANTONIO- NORTHERN SALINAS VALLEY...HOLLISTER VALLEY...AND CARMEL VALLEY- 758 AM PST TUE JAN 17 2012 ...FREEZE WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO 8 AM PST WEDNESDAY... THE FREEZE WARNING WILL BE ALLOWED TO EXPIRE AT 8 AM PST THIS MORNING. A FREEZE WARNING REMAINS IN EFFECT FROM 11 PM THIS EVENING TO 8 AM PST WEDNESDAY. * TEMPERATURES: LOWS WILL BE IN THE 20S WEDNESDAY MORNING. * IMPACTS: AREAS OF BLACK ICE MAY ALSO BE POSSIBLE ESPECIALLY ON BRIDGES AND OVER PASSES. SENSITIVE VEGETATION COULD BE KILLED BY THE COLD TEMPERATURES. PLEASE TAKE OUTDOOR PETS INTO CONSIDERATION DURING THESE COLD TEMPERATURES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER SENSITIVE VEGETATION. && $$ CAZ506>508-510-529-530-171700- /O.EXP.KMTR.FZ.W.0001.000000T0000Z-120117T1600Z/ NORTH BAY INTERIOR VALLEYS-NORTH BAY MOUNTAINS- SAN FRANCISCO BAY SHORELINE-EAST BAY INTERIOR VALLEYS- NORTHERN MONTEREY BAY-SOUTHERN MONTEREY BAY AND BIG SUR COAST- 758 AM PST TUE JAN 17 2012 ...FREEZE WARNING WILL BE ALLOWED TO EXPIRE AT 8 AM PST THIS MORNING... THE FREEZE WARNING WILL EXPIRE AT 8 AM PST THIS MORNING. $$
375 WWUS76 KMTR 180106 NPWMTR URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA 506 PM PST TUE JAN 17 2012 .CLEAR SKIES AND LIGHT WINDS WILL ALLOW FOR PROLONGED SUB- FREEZING TEMPERATURES TO OCCUR AGAIN TONIGHT INTO WEDNESDAY MORNING FOR PORTIONS OF THE MONTEREY BAY REGION. CAZ513-516-528-181700- /O.EXT.KMTR.FZ.W.0002.120118T0700Z-120118T1700Z/ SANTA CLARA VALLEY...INCLUDING SAN JOSE- SOUTHERN SALINAS VALLEY...ARROYO SECO...AND LAKE SAN ANTONIO- NORTHERN SALINAS VALLEY...HOLLISTER VALLEY...AND CARMEL VALLEY- 506 PM PST TUE JAN 17 2012 ...FREEZE WARNING NOW IN EFFECT FROM 11 PM THIS EVENING TO 9 AM PST WEDNESDAY... THE FREEZE WARNING IS NOW IN EFFECT FROM 11 PM THIS EVENING TO 9 AM PST WEDNESDAY. * TEMPERATURES: LOWS WILL BE IN THE 20S WEDNESDAY MORNING. * IMPACTS: AREAS OF BLACK ICE MAY ALSO BE POSSIBLE ESPECIALLY ON BRIDGES AND OVER PASSES. SENSITIVE VEGETATION COULD BE KILLED BY THE COLD TEMPERATURES. PLEASE TAKE OUTDOOR PETS INTO CONSIDERATION DURING THESE COLD TEMPERATURES. PRECAUTIONARY/PREPAREDNESS ACTIONS... A FREEZE WARNING MEANS SUB-FREEZING TEMPERATURES ARE IMMINENT OR HIGHLY LIKELY. THESE CONDITIONS WILL KILL CROPS AND OTHER SENSITIVE VEGETATION. && $$
655 WWUS76 KMTR 181712 NPWMTR URGENT - WEATHER MESSAGE NATIONAL WEATHER SERVICE SAN FRANCISCO BAY AREA 912 AM PST WED JAN 18 2012 ...FREEZE WARNING HAS BEEN ALLOWED TO EXPIRE... CAZ513-516-528-181815- /O.EXP.KMTR.FZ.W.0002.000000T0000Z-120118T1700Z/ SANTA CLARA VALLEY...INCLUDING SAN JOSE- SOUTHERN SALINAS VALLEY...ARROYO SECO...AND LAKE SAN ANTONIO- NORTHERN SALINAS VALLEY...HOLLISTER VALLEY...AND CARMEL VALLEY- 912 AM PST WED JAN 18 2012 ...FREEZE WARNING HAS EXPIRED... THE FREEZE WARNING IS NO LONGER IN EFFECT. TEMPERATURES HAVE WARMED ABOVE FREEZING ACROSS MOST OF THE AREA. $$
The office that day
Everything else NWS San Francisco Bay Area, CA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 17, 2:25 AM PST | Small Craft Advisory | MTR | 66 hr |
Nearby
Freeze Warnings in California, 2012Every freeze warning in 2012
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.