Alert archive / California / Red Flag Warnings in 2012
Red Flag Warning 8, NWS Reno, NV
NWS Reno, NV issued this red flag warning at May 23, 2012, 12:37 PM PDT for 4 counties in California. It took effect at May 24, 2012, 11:00 AM PDT. It was in force for 12 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
- May 23, 2012, 12:37 PM PDT (19:37 UTC)
- In effect from
- May 24, 2012, 11:00 AM PDT
- Expired
- May 24, 2012, 11:00 PM PDT
- In force
- 12 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 19:40 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 12:00Z, 7.6 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
- 941 m above ground
- 0-6 km bulk shear
- 61 kt
- 0-1 km storm-relative helicity
- 87 m²/s²
- 0-3 km storm-relative helicity
- 156 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
751 WWUS85 KREV 231937 RFWREV URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE RENO NV 1237 PM PDT WED MAY 23 2012 ...GUSTY WINDS AND LOW RELATIVE HUMIDITY THURSDAY... .LOW PRESSURE OVER THE PACIFIC NORTHWEST WILL DROP SOUTH INTO NORTHERN CALIFORNIA AND NORTHWEST NEVADA BY FRIDAY MORNING. AHEAD OF THE SYSTEM...WINDS WILL INCREASE THURSDAY AND WILL COMBINE WITH LOW AFTERNOON HUMIDITY TO CREATE CRITICAL FIRE WEATHER CONDITIONS IN THE TAHOE BASIN...WESTERN NEVADA BASIN AND RANGE...WESTERN NEVADA SIERRA FRONT...MINERAL...SOUTHERN LYON AND MONO COUNTIES. CAZ273-NVZ459-241400- /O.UPG.KREV.FW.A.0005.120524T2100Z-120525T0400Z/ /O.NEW.KREV.FW.W.0008.120524T1800Z-120525T0600Z/ MONO-EASTERN ALPINE COUNTIES-MINERAL AND SOUTHERN LYON COUNTIES- 1237 PM PDT WED MAY 23 2012 ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 11 PM PDT THURSDAY FOR GUSTY WINDS AND LOW HUMIDITY FOR EASTERN ALPINE...MONO...MINERAL AND SOUTHERN LYON COUNTIES... THE NATIONAL WEATHER SERVICE IN RENO HAS ISSUED A RED FLAG WARNING FOR GUSTY WINDS AND LOW HUMIDITY...WHICH IS IN EFFECT FROM 11 AM TO 11 PM PDT THURSDAY. THE FIRE WEATHER WATCH IS NO LONGER IN EFFECT. * AFFECTED AREA...FIRE ZONE 273 MONO-EASTERN ALPINE COUNTIES AND FIRE ZONE 459 MINERAL AND SOUTHERN LYON COUNTIES. * WINDS...WEST WINDS 15 TO 25 MPH WITH GUSTS TO 40 MPH. GUSTS TO 50 MPH ARE POSSIBLE IN WIND PRONE AREAS. STRONGEST WINDS EXPECTED AFTER 1300. * HUMIDITY...LOWERING TO 10 TO 15 PERCENT THURSDAY AFTERNOON. * 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. && $$ CAZ272-NVZ450-453-241400- /O.NEW.KREV.FW.W.0008.120524T1800Z-120525T0600Z/ GREATER LAKE TAHOE AREA-WESTERN NEVADA SIERRA FRONT- WEST CENTRAL NEVADA BASIN AND RANGE- 1237 PM PDT WED MAY 23 2012 ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 11 PM PDT THURSDAY FOR GUSTY WINDS AND LOW HUMIDITY FOR LAKE TAHOE BASIN...WESTERN NEVADA SIERRA FRONT...AND WEST CENTRAL NEVADA BASIN AND RANGE... THE NATIONAL WEATHER SERVICE IN RENO HAS ISSUED A RED FLAG WARNING FOR GUSTY WINDS AND LOW HUMIDITY...WHICH IS IN EFFECT FROM 11 AM TO 11 PM PDT THURSDAY. * AFFECTED AREA...FIRE ZONE 272 GREATER LAKE TAHOE AREA...FIRE ZONE 450 WESTERN NEVADA SIERRA FRONT AND FIRE ZONE 453 WEST CENTRAL NEVADA BASIN AND RANGE. * WINDS...WEST WINDS 15 TO 25 MPH WITH GUSTS TO 40 MPH THURSDAY AFTERNOON. GUSTS TO 50 MPH ARE POSSIBLE IN WIND PRONE AREAS. STRONGEST WINDS EXPECTED AFTER 1300. * HUMIDITY...FOR WESTERN NEVADA...LOWERING TO 10 TO 15 PERCENT BY THURSDAY AFTERNOON. FOR THE TAHOE BASIN...LOWERING TO 15 TO 20 PERCENT BY THURSDAY AFTERNOON. * IMPACTS...THE COMBINATION OF GUSTY WINDS AND LOW HUMIDITY WILL CREATE CRITICAL FIRE WEATHER CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS WILL OCCUR. CONTINUE TO CHECK WEATHER.GOV/RENO FOR UPDATES. && $$ HTTP://WEATHER.GOV/RENO
3 follow-up statements
393 WWUS85 KREV 240917 RFWREV URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE RENO NV 217 AM PDT THU MAY 24 2012 ...GUSTY WINDS AND LOW RELATIVE HUMIDITY TODAY... .LOW PRESSURE OVER THE PACIFIC NORTHWEST AND THE JET STREAM OVER THE SIERRA WILL PRODUCE GUSTY WINDS AND VERY LOW HUMIDITY. CRITICAL FIRE WEATHER CONDITIONS WILL IMPACT THE SIERRA AND WESTERN NEVADA ALONG AND SOUTH OF INTERSTATE 80. THIS INCLUDES THE LAKE TAHOE BASIN AND THE TRE FIRE. CAZ272-NVZ450-453-242300- /O.CON.KREV.FW.W.0008.120524T1800Z-120525T0600Z/ GREATER LAKE TAHOE AREA-WESTERN NEVADA SIERRA FRONT- WEST CENTRAL NEVADA BASIN AND RANGE- 217 AM PDT THU MAY 24 2012 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 11 PM PDT THIS EVENING FOR GUSTY WINDS AND LOW HUMIDITY FOR LAKE TAHOE BASIN...WESTERN NEVADA SIERRA FRONT...AND WEST CENTRAL NEVADA BASIN AND RANGE... * AFFECTED AREA...FIRE ZONE 272 GREATER LAKE TAHOE AREA...FIRE ZONE 450 WESTERN NEVADA SIERRA FRONT AND FIRE ZONE 453 WEST CENTRAL NEVADA BASIN AND RANGE. * WINDS...WEST WINDS 20 TO 30 MPH WITH GUSTS TO 45 MPH. * GUSTS OF 50 MPH OR MORE WILL OCCUR IN WIND PRONE AREAS AND OVER RIDGES ABOVE 7000 FEET. * HUMIDITY...8 TO 15 PERCENT...WITH VALUES BELOW 20 PERCENT IN THE TAHOE BASIN. * 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. && $$ CAZ273-NVZ459-242300- /O.CON.KREV.FW.W.0008.120524T1800Z-120525T0600Z/ MONO-EASTERN ALPINE COUNTIES-MINERAL AND SOUTHERN LYON COUNTIES- 217 AM PDT THU MAY 24 2012 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 11 PM PDT THIS EVENING FOR GUSTY WINDS AND LOW HUMIDITY FOR EASTERN ALPINE...MONO...MINERAL AND SOUTHERN LYON COUNTIES... * AFFECTED AREA...FIRE ZONE 273 MONO-EASTERN ALPINE COUNTIES AND FIRE ZONE 459 MINERAL AND SOUTHERN LYON COUNTIES. * WINDS...WEST 20 TO 30 MPH WITH GUSTS TO 45 MPH. * GUSTS OF 50 MPH OR MORE WILL OCCUR IN WIND PRONE AREAS ALONG HIGHWAYS 95...395 AND OVER RIDGES. * HUMIDITY...5 TO 15 PERCENT. * WIND GUSTS TO 40 MPH AND HUMIDITY BELOW 25 PERCENT MAY CONTINUE INTO EARLY FRIDAY MORNING. * IMPACTS...THE COMBINATION OF GUSTY WINDS AND LOW HUMIDITY WILL CREATE CRITICAL FIRE WEATHER CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS WILL OCCUR. CONTINUE TO CHECK WEATHER.GOV/RENO FOR UPDATES. && $$ HTTP://WEATHER.GOV/RENO
628 WWUS85 KREV 242216 RFWREV URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE RENO NV 316 PM PDT THU MAY 24 2012 ...GUSTY WINDS WITH LOW HUMIDITY THROUGH THIS EVENING... .LOW PRESSURE OVER THE PACIFIC NORTHWEST AND THE JET STREAM OVER THE SIERRA WILL CONTINUE TO PRODUCE GUSTY WINDS AND VERY LOW HUMIDITY. CRITICAL FIRE WEATHER CONDITIONS WILL IMPACT THE SIERRA AND WESTERN NEVADA ALONG AND SOUTH OF INTERSTATE 80 THROUGH THIS EVENING. THIS INCLUDES THE LAKE TAHOE BASIN AND THE TRE FIRE. CAZ272-NVZ450-453-250600- /O.CON.KREV.FW.W.0008.000000T0000Z-120525T0600Z/ GREATER LAKE TAHOE AREA-WESTERN NEVADA SIERRA FRONT- WEST CENTRAL NEVADA BASIN AND RANGE- 316 PM PDT THU MAY 24 2012 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 11 PM PDT THIS EVENING FOR GUSTY WINDS AND LOW HUMIDITY FOR LAKE TAHOE BASIN... WESTERN NEVADA SIERRA FRONT...AND WEST CENTRAL NEVADA BASIN AND RANGE... * AFFECTED AREA...FIRE ZONE 272 GREATER LAKE TAHOE AREA...FIRE ZONE 450 WESTERN NEVADA SIERRA FRONT AND FIRE ZONE 453 WEST CENTRAL NEVADA BASIN AND RANGE. * WINDS...WEST 20 TO 30 MPH WITH GUSTS TO 45 MPH. * GUSTS OF 50 MPH OR MORE WILL OCCUR IN WIND PRONE AREAS AND OVER RIDGES ABOVE 7000 FEET. * HUMIDITY...8 TO 15 PERCENT...WITH VALUES BELOW 20 PERCENT IN THE TAHOE BASIN. * 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. && $$ CAZ273-NVZ459-250600- /O.CON.KREV.FW.W.0008.000000T0000Z-120525T0600Z/ MONO-EASTERN ALPINE COUNTIES-MINERAL AND SOUTHERN LYON COUNTIES- 316 PM PDT THU MAY 24 2012 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 11 PM PDT THIS EVENING FOR GUSTY WINDS AND LOW HUMIDITY FOR EASTERN ALPINE... MONO...MINERAL AND SOUTHERN LYON COUNTIES... * AFFECTED AREA...FIRE ZONE 273 MONO-EASTERN ALPINE COUNTIES AND FIRE ZONE 459 MINERAL AND SOUTHERN LYON COUNTIES. * WINDS...WEST 20 TO 30 MPH WITH GUSTS TO 45 MPH. * GUSTS OF 50 MPH OR MORE WILL OCCUR IN WIND PRONE AREAS ALONG HIGHWAYS 95...395 AND OVER RIDGES. * HUMIDITY...5 TO 15 PERCENT. * WIND GUSTS TO 40 MPH AND HUMIDITY BELOW 25 PERCENT MAY CONTINUE INTO EARLY FRIDAY MORNING. * IMPACTS...THE COMBINATION OF GUSTY WINDS AND LOW HUMIDITY WILL CREATE CRITICAL FIRE WEATHER CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS WILL OCCUR. CONTINUE TO CHECK WEATHER.GOV/RENO FOR UPDATES. && $$ HTTP://WEATHER.GOV/RENO
849 WWUS85 KREV 250535 RFWREV URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE RENO NV 1035 PM PDT THU MAY 24 2012 CAZ272-NVZ450-453-250645- /O.EXP.KREV.FW.W.0008.000000T0000Z-120525T0600Z/ GREATER LAKE TAHOE AREA-WESTERN NEVADA SIERRA FRONT- WEST CENTRAL NEVADA BASIN AND RANGE- 1035 PM PDT THU MAY 24 2012 ...RED FLAG WARNING WILL EXPIRE AT 11 PM PDT THIS EVENING... WINDS ARE DECREASING WITH ONLY LOCAL GUSTS TO 30 MPH. IN ADDITION...HUMIDITY HAS INCREASED ABOVE 30 PERCENT SO THE RED FLAG WARNING WILL EXPIRE AT 11 PM. $$ CAZ273-NVZ459-250645- /O.EXP.KREV.FW.W.0008.000000T0000Z-120525T0600Z/ MONO-EASTERN ALPINE COUNTIES-MINERAL AND SOUTHERN LYON COUNTIES- 1035 PM PDT THU MAY 24 2012 ...RED FLAG WARNING WILL EXPIRE AT 11 PM PDT THIS EVENING... WINDS ARE DECREASING WITH ONLY LOCAL GUSTS TO 30 MPH. IN ADDITION...HUMIDITY HAS INCREASED ABOVE 20 PERCENT SO THE RED FLAG WARNING WILL EXPIRE AT 11 PM. $$ HTTP://WEATHER.GOV/RENO
The office that day
Everything else NWS Reno, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 23, 3:30 PM PDT | Lake Wind Advisory | REV | Churchill, Douglas, Lyon, Pershing, Washoe | 32 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.