Alert archive / California / Red Flag Warnings in 2012
Red Flag Warning 3, NWS Reno, NV
NWS Reno, NV issued this red flag warning at Jan 19, 2012, 6:32 AM PST for 4 counties in California. It was in force for 15 hr. 5 reports came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jan 19, 2012, 6:32 AM PST (14:32 UTC)
- Expired
- Jan 19, 2012, 10:00 PM PST
- In force
- 15 hr
- Issued by
- NWS Reno, NV
Counties El Dorado County, CA, Nevada County, CA, Placer County, CA, Sierra County, CA
The radar
The Beale AFB radar (KBBX), 93 km from the middle of the area, began a volume at 14:36 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jan 19, 10:00 AM PST | SNOW | Grass Valley, CA | SPOTTER NV 56, LIGHT SNOW NEAR GRASS VALLEY ELEVATION 2,500 |
| Jan 19, 10:45 AM PST | SLEET | 2 E Cherokee, CA | REPORTED BY SPOTTER NV09 SLEET FALLING AT ELEVATION 2800 FEET |
| Jan 19, 12:38 PM PST | NON-TSTM WND GST 70 | South Lake Tahoe, CA | A WIND GUST OF 70 MPH WAS REPORTED AT SOUTH LAKE TAHOE AIRPORT. |
| Jan 19, 3:33 PM PST | NON-TSTM WND DMG | Verdi, CA | A LARGE TREE WAS BLOWN OVER A PRIVATE ROAD IN VERDI. |
| Jan 19, 4:40 PM PST | SNOW 0 | 3 Se Nevada City, CA | MDT SNOW. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Oakland, CA (KOAK), launched 12:00Z, 2.5 hours before the alert went out and 211 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
- 597 m above ground
- 0-6 km bulk shear
- 48 kt
- 0-1 km storm-relative helicity
- 33 m²/s²
- 0-3 km storm-relative helicity
- 183 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
856 WWUS85 KREV 191432 RFWREV URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE RENO NV 632 AM PST THU JAN 19 2012 ...WINDY AND DRY AGAIN TODAY... .A DRY AIRMASS REMAINS NEAR THE SURFACE ALONG AND SOUTH OF INTERSTATE 80. STRONG WINDS ARE EXPECTED AGAIN LATE THIS MORNING INTO THE AFTERNOON. MOISTURE WILL SLOWLY WORK ITS WAY SOUTH THIS AFTERNOON AND EVENING. HUMIDITY WILL INCREASE SHARPLY WHEN THIS BOUNDARY ARRIVES...BEGINNING ON THE NORTH SIDE OF LAKE TAHOE. IT WILL THEN PROGRESS TO SOUTH LAKE TAHOE AND THE SIERRA FRONT BY LATE AFTERNOON AND INTO MONO COUNTY THIS EVENING. CAZ273-200000- /O.NEW.KREV.FW.W.0003.120119T1800Z-120120T0400Z/ MONO-EASTERN ALPINE COUNTIES- 632 AM PST THU JAN 19 2012 ...RED FLAG WARNING IN EFFECT FROM 10 AM THIS MORNING TO 8 PM PST THIS EVENING FOR GUSTY WIND AND LOW HUMIDITY FOR MONO COUNTY AND EASTERN ALPINE COUNTY DUE TO GUSTY WINDS AND LOW HUMIDITY... THE NATIONAL WEATHER SERVICE IN RENO HAS ISSUED A RED FLAG WARNING FOR GUSTY WIND AND LOW HUMIDITY...WHICH IS IN EFFECT FROM 10 AM THIS MORNING TO 8 PM PST THIS EVENING. * AFFECTED AREA...FIRE ZONE 273 MONO-EASTERN ALPINE COUNTIES. * WINDS...SOUTHWEST 15 TO 30 MPH WITH GUSTS TO 45 MPH THIS AFTERNOON AND EVENING. * HUMIDITY...8 TO 15 PERCENT THROUGH THE AFTERNOON THEN RISING RAPIDLY FROM NORTH TO SOUTH EARLY THIS EVENING. * IMPACTS...THE COMBINATION OF GUSTY WINDS AND LOW HUMIDITY WILL CREATE CRITICAL FIRE WEATHER CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS WILL OCCUR. CONTINUE TO CHECK WEATHER.GOV/RENO FOR UPDATES. && $$ CAZ272-200000- /O.NEW.KREV.FW.W.0003.120119T1432Z-120120T0000Z/ GREATER LAKE TAHOE AREA- 632 AM PST THU JAN 19 2012 ...RED FLAG WARNING IN EFFECT UNTIL 4 PM PST THIS AFTERNOON FOR GUSTY WIND AND LOW HUMIDITY FOR THE LAKE TAHOE BASIN DUE TO STRONG WINDS AND LOW HUMIDITY... THE NATIONAL WEATHER SERVICE IN RENO HAS ISSUED A RED FLAG WARNING FOR GUSTY WIND AND LOW HUMIDITY...WHICH IS IN EFFECT UNTIL 4 PM PST THIS AFTERNOON. * AFFECTED AREA...FIRE ZONE 272 GREATER LAKE TAHOE AREA. * WINDS...SOUTHWEST 15 TO 25 MPH WITH GUSTS TO 35 MPH THIS MORNING INCREASING TO 20 TO 30 MPH WITH GUSTS TO 55 MPH THIS AFTERNOON. * HUMIDITY...10 TO 20 PERCENT. RAPIDLY INCREASING ABOVE 20 PERCENT AROUND NOON FOR NORTH LAKE TAHOE AND AROUDN 3 PM FOR SOUTH LAKE TAHOE. * IMPACTS...THE COMBINATION OF GUSTY WINDS AND LOW HUMIDITY WILL CREATE CRITICAL FIRE WEATHER CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS WILL OCCUR. CONTINUE TO CHECK WEATHER.GOV/RENO FOR UPDATES. && $$ NVZ450-200000- /O.NEW.KREV.FW.W.0003.120119T1432Z-120120T0000Z/ WESTERN NEVADA SIERRA FRONT- 632 AM PST THU JAN 19 2012 ...RED FLAG WARNING IN EFFECT UNTIL 4 PM PST THIS AFTERNOON FOR GUSTY WIND AND LOW HUMIDITY FOR THE WESTERN NEVADA SIERRA FRONT DUE TO STRONG WINDS AND LOW HUMIDITY... THE NATIONAL WEATHER SERVICE IN RENO HAS ISSUED A RED FLAG WARNING FOR GUSTY WIND AND LOW HUMIDITY...WHICH IS IN EFFECT UNTIL 4 PM PST THIS AFTERNOON. * AFFECTED AREA...FIRE ZONE 450 WESTERN NEVADA SIERRA FRONT. * WINDS...SOUTHWEST 15 TO 30 MPH WITH GUSTS TO 50 MPH. LOCAL GUSTS TO 60 MPH IN WIND PRONE AREAS. * HUMIDITY...8 TO 15 PERCENT. HUMIDITY WILL BEGIN TO RISE AROUND 3 PM. * IMPACTS...THE COMBINATION OF GUSTY WINDS AND LOW HUMIDITY WILL CREATE CRITICAL FIRE WEATHER CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS WILL OCCUR. CONTINUE TO CHECK WEATHER.GOV/RENO FOR UPDATES. && $$ HTTP://WEATHER.GOV/RENO
2 follow-up statements
768 WWUS85 KREV 192245 RFWREV URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE RENO NV 245 PM PST THU JAN 19 2012 ...STRONG WINDS WILL CONTINUE INTO THIS EVENING... STRONG SOUTHWEST WINDS WILL CONTINUE INTO THIS EVENING AHEAD OF A WINTER STORM APPROACHING THE SIERRA. RELATIVE HUMIDITY VALUES WILL GRADUALLY INCREASE THROUGH THIS EVENING AS THE ATMOSPHERE MOISTENS AHEAD OF THE STORM. STRONG WINDS COMBINED WITH UNSEASONABLY DRY FUELS WILL CREATE CRITICAL FIRE WEATHER CONDITIONS THROUGH 10 PM. CAZ272-192345- /O.CAN.KREV.FW.W.0003.000000T0000Z-120120T0000Z/ GREATER LAKE TAHOE AREA- 245 PM PST THU JAN 19 2012 ...RED FLAG WARNING IS CANCELLED FOR GUSTY WIND AND LOW HUMIDITY FOR THE LAKE TAHOE BASIN DUE TO STRONG WINDS AND LOW HUMIDITY... THE NATIONAL WEATHER SERVICE IN RENO HAS CANCELLED THE RED FLAG WARNING. RELATIVE HUMIDITY VALUES HAVE INCREASED THIS AFTERNOON AND RAIN AND SNOW ARE MOVING INTO THE WESTERN HALF OF THE TAHOE BASIN. $$ CAZ273-200600- /O.EXT.KREV.FW.W.0003.000000T0000Z-120120T0600Z/ MONO-EASTERN ALPINE COUNTIES- 245 PM PST THU JAN 19 2012 ...RED FLAG WARNING NOW IN EFFECT UNTIL 10 PM PST THIS EVENING FOR GUSTY WIND AND LOW HUMIDITY FOR MONO COUNTY AND EASTERN ALPINE COUNTY DUE TO GUSTY WINDS AND LOW HUMIDITY... THE RED FLAG WARNING IS NOW IN EFFECT UNTIL 10 PM PST THIS EVENING. * AFFECTED AREA...FIRE ZONE 273 MONO-EASTERN ALPINE COUNTIES. * WINDS...SOUTHWEST 15 TO 30 MPH WITH GUSTS TO 45 MPH WITH GUSTS TO 55 MPH IN WIND PRONE AREAS. * HUMIDITY...5 TO 10 PERCENT THEN RISING TO 20 TO 30 PERCENT BY MIDNIGHT. * IMPACTS...THE COMBINATION OF GUSTY WINDS AND LOW HUMIDITY WILL CREATE CRITICAL FIRE WEATHER CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS WILL OCCUR. CONTINUE TO CHECK WEATHER.GOV/RENO FOR UPDATES. && $$ NVZ450-200600- /O.EXT.KREV.FW.W.0003.000000T0000Z-120120T0600Z/ WESTERN NEVADA SIERRA FRONT- 245 PM PST THU JAN 19 2012 ...RED FLAG WARNING NOW IN EFFECT UNTIL 10 PM PST THIS EVENING FOR GUSTY WIND AND LOW HUMIDITY FOR THE WESTERN NEVADA SIERRA FRONT DUE TO STRONG WINDS AND LOW HUMIDITY... THE RED FLAG WARNING IS NOW IN EFFECT UNTIL 10 PM PST THIS EVENING. * AFFECTED AREA...FIRE ZONE 450 WESTERN NEVADA SIERRA FRONT. * WINDS...SOUTHWEST 20 TO 35 MPH WITH GUSTS TO 55 MPH. GUSTS 60 TO 70 MPH IN WIND PRONE AREAS...SUCH AS WASHOE VALLEY NEAR THE WASHOE DRIVE FIRE. * HUMIDITY...20 TO 30 PERCENT THIS AFTERNOON...RISING ABOVE 40 PERCENT BY 10 PM THIS EVENING. * IMPACTS...THE COMBINATION OF GUSTY WINDS AND LOW HUMIDITY WILL CREATE CRITICAL FIRE WEATHER CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS WILL OCCUR. CONTINUE TO CHECK WEATHER.GOV/RENO FOR UPDATES. && $$ HTTP://WEATHER.GOV/RENO
585 WWUS85 KREV 200555 RFWREV URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE RENO NV 955 PM PST THU JAN 19 2012 CAZ273-200700- /O.EXP.KREV.FW.W.0003.000000T0000Z-120120T0600Z/ MONO-EASTERN ALPINE COUNTIES- 955 PM PST THU JAN 19 2012 ...RED FLAG WARNING WILL EXPIRE AT 10 PM PST THIS EVENING FOR GUSTY WIND AND LOW HUMIDITY FOR MONO COUNTY AND EASTERN ALPINE COUNTY DUE TO GUSTY WINDS AND LOW HUMIDITY... THE RED FLAG WARNING WILL EXPIRE AT 10 PM PST THIS EVENING. HUMIDITY HAS INCREASED TO OVER 50% THIS EVENING, ENDING THE CRITICAL FIRE WEATHER CONDITIONS. STRONG WIND GUSTS OF UP TO 45 MPH WILL CONTINUE OVERNIGHT, ESPECIALLY FOR MIDSLOPES AND WIND PRONE AREAS. $$ NVZ450-200700- /O.EXP.KREV.FW.W.0003.000000T0000Z-120120T0600Z/ WESTERN NEVADA SIERRA FRONT- 955 PM PST THU JAN 19 2012 ...RED FLAG WARNING WILL EXPIRE AT 10 PM PST THIS EVENING FOR GUSTY WIND AND LOW HUMIDITY FOR THE WESTERN NEVADA SIERRA FRONT DUE TO STRONG WINDS AND LOW HUMIDITY... THE RED FLAG WARNING WILL EXPIRE AT 10 PM PST THIS EVENING. HUMIDITY HAS INCREASED TO OVER 50% THIS EVENING, ENDING THE CRITICAL FIRE WEATHER CONDITIONS. STRONG WIND GUSTS OF UP TO 45 MPH WILL CONTINUE OVERNIGHT, ESPECIALLY FOR MIDSLOPES AND WIND PRONE AREAS. $$ HTTP://WEATHER.GOV/RENO
The office that day
Everything else NWS Reno, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 18, 4:00 PM PST | Winter Storm Watch | REV | Douglas, Washoe | 23 hr |
| Jan 18, 4:00 PM PST | Winter Weather Advisory | REV | Douglas, Washoe | 36 hr |
| Jan 18, 8:55 PM PST | Lake Wind Advisory | REV | Churchill, Douglas, Lyon, Pershing, Washoe | 21 hr |
| Jan 19, 3:16 PM PST | Winter Storm Warning | REV | Douglas, Washoe | 43 hr |
| Jan 19, 3:16 PM PST | Winter Weather Advisory | REV | Washoe | 43 hr |
Nearby
Red Flag Warnings in California, 2012Red Flag Warnings in Nevada, 2012Every red flag 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.