Alert archive / Arizona / Red Flag Warnings in 2012
Red Flag Warning 1, NWS Las Vegas, NV
NWS Las Vegas, NV issued this red flag warning at Mar 1, 2012, 4:51 AM MST for Mohave County, Arizona; Clark County, Nevada; San Bernardino County, California. It took effect at Mar 2, 2012, 11:00 AM MST. It was in force for 9 hr. 1 report 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
- Mar 1, 2012, 4:51 AM MST (11:51 UTC)
- In effect from
- Mar 2, 2012, 11:00 AM MST
- Expired
- Mar 2, 2012, 8:00 PM MST
- In force
- 9 hr
- Issued by
- NWS Las Vegas, NV
Counties Mohave County, AZ, San Bernardino County, CA, Clark County, NV
The radar
The Las Vegas radar (KESX), 15 km from the middle of the area, began a volume at 11:52 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 |
|---|---|---|---|
| Mar 2, 11:43 AM MST | NON-TSTM WND GST 59 | 1 Sw Crestline, CA | SUSTAINED WINDS OVER 40 MPH AND GUSTS OVER 58 MPH SINCE 0648 PST. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Las Vegas, NV (KVEF), launched 00:00Z, 11.9 hours before the alert went out and 101 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
- 3133 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 92 m²/s²
- 0-3 km storm-relative helicity
- 120 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
270 WWUS85 KVEF 011151 RFWVEF URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE LAS VEGAS NV 351 AM PST THU MAR 1 2012 .STRONG NORTH WINDS WILL USHER VERY DRY AIR INTO THE COLORADO RIVER VALLEY ON FRIDAY. AZZ101-CAZ229-NVZ466-012300- /O.UPG.KVEF.FW.A.0001.120302T1800Z-120303T0400Z/ /O.NEW.KVEF.FW.W.0001.120302T1800Z-120303T0300Z/ LAKE MEAD NRA/COLORADO RIVER-AZ SIDE-LOWER COLORADO RIVER VALLEY- LAKE MEAD NRA/COLORADO RIVER-NV SIDE- 351 AM PST THU MAR 1 2012 /451 AM MST THU MAR 1 2012/ ...RED FLAG WARNING IN EFFECT FROM 10 AM PST /11 AM MST/ TO 7 PM PST /8 PM MST/ FRIDAY FOR STRONG WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 101 - 229 AND 466... THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A RED FLAG WARNING FOR THE COLORADO RIVER VALLEY FOR STRONG WINDS AND LOW RELATIVE HUMIDITY...WHICH IS IN EFFECT FROM 10 AM PST /11 AM MST/ TO 7 PM PST /8 PM MST/ FRIDAY. THIS REPLACES THE FIRE WEATHER WATCH. * AFFECTED AREA...IN ARIZONA...FIRE WEATHER ZONE 101 LAKE MEAD NRA/COLORADO RIVER-AZ SIDE. IN CALIFORNIA...FIRE WEATHER ZONE 229 LOWER COLORADO RIVER VALLEY. IN NEVADA...FIRE WEATHER ZONE 466 LAKE MEAD NRA/COLORADO RIVER-NV SIDE. * TIMING...WINDS WILL PICK UP EARLY FRIDAY MORNING...PEAK IN THE AFTERNOON...AND DECREASE IN THE EVENING. RELATIVE HUMIDITY WILL DROP BELOW 15 PERCENT BY NOON...AND SHOULD BEGIN TO RECOVER LATE IN THE EVENING. * WIND...NORTH WINDS 25 TO 35 MPH WITH GUSTS OF 40 TO 50 MPH. * HUMIDITY...7 TO 12 PERCENT. * IMPACTS...THE COMBINATION OF STRONG WINDS...LOW HUMIDITY AND DRY FUELS WILL CREATE CONDITIONS FAVORABLE FOR EXTREME FIRE BEHAVIOR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING OR ARE IMMINENT. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL CREATE EXTREME FIRE GROWTH POTENTIAL. && $$ MORGAN HTTP://WEATHER.GOV/LASVEGAS
4 follow-up statements
888 WWUS85 KVEF 012228 RFWVEF URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE LAS VEGAS NV 228 PM PST THU MAR 1 2012 .STRONG NORTH WINDS WILL USHER VERY DRY AIR INTO THE COLORADO RIVER VALLEY ON FRIDAY. AZZ101-CAZ229-NVZ466-021200- /O.CON.KVEF.FW.W.0001.120302T1800Z-120303T0300Z/ LAKE MEAD NRA/COLORADO RIVER-AZ SIDE-LOWER COLORADO RIVER VALLEY- LAKE MEAD NRA/COLORADO RIVER-NV SIDE- 228 PM PST THU MAR 1 2012 /328 PM MST THU MAR 1 2012/ ...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM PST /11 AM MST/ TO 7 PM PST /8 PM MST/ FRIDAY FOR STRONG WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 101...229 AND 466... THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A RED FLAG WARNING FOR THE COLORADO RIVER VALLEY FOR STRONG WINDS AND LOW RELATIVE HUMIDITY...WHICH IS IN EFFECT FROM 10 AM PST /11 AM MST/ TO 7 PM PST /8 PM MST/ FRIDAY. * AFFECTED AREA...IN ARIZONA...FIRE WEATHER ZONE 101 LAKE MEAD NRA/COLORADO RIVER-AZ SIDE. IN CALIFORNIA...FIRE WEATHER ZONE 229 LOWER COLORADO RIVER VALLEY. IN NEVADA...FIRE WEATHER ZONE 466 LAKE MEAD NRA/COLORADO RIVER-NV SIDE. * TIMING...WINDS WILL PICK UP EARLY FRIDAY MORNING...PEAK IN THE AFTERNOON...AND DECREASE IN THE EVENING. RELATIVE HUMIDITY WILL DROP BELOW 15 PERCENT BY NOON...AND SHOULD BEGIN TO RECOVER LATE IN THE EVENING. * WIND...NORTH WINDS 25 TO 35 MPH WITH GUSTS OF 40 TO 50 MPH. * HUMIDITY...7 TO 12 PERCENT. * IMPACTS...THE COMBINATION OF STRONG WINDS...LOW HUMIDITY AND DRY FUELS WILL CREATE CONDITIONS FAVORABLE FOR EXTREME FIRE BEHAVIOR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING OR ARE IMMINENT. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL CREATE EXTREME FIRE GROWTH POTENTIAL. && $$ HTTP://WEATHER.GOV/LASVEGAS
988 WWUS85 KVEF 021245 RFWVEF URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE LAS VEGAS NV 445 AM PST FRI MAR 2 2012 AZZ101-CAZ229-NVZ466-022000- /O.CON.KVEF.FW.W.0001.120302T1800Z-120303T0300Z/ LAKE MEAD NRA/COLORADO RIVER-AZ SIDE-LOWER COLORADO RIVER VALLEY- LAKE MEAD NRA/COLORADO RIVER-NV SIDE- 445 AM PST FRI MAR 2 2012 /545 AM MST FRI MAR 2 2012/ ...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM PST /11 AM MST/ THIS MORNING TO 7 PM PST /8 PM MST/ THIS EVENING FOR STRONG WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 101...229 AND 466... A RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM PST /11 AM MST/ THIS MORNING TO 7 PM PST /8 PM MST/ THIS EVENING FOR COLORADO RIVER VALLEY DUE TO STRONG NORTH WINDS AND LOW RELATIVE HUMIDITY. * AFFECTED AREA...IN ARIZONA...FIRE WEATHER ZONE 101 LAKE MEAD NRA/COLORADO RIVER-AZ SIDE. IN CALIFORNIA...FIRE WEATHER ZONE 229 LOWER COLORADO RIVER VALLEY. IN NEVADA...FIRE WEATHER ZONE 466 LAKE MEAD NRA/COLORADO RIVER-NV SIDE. * TIMING...WINDS WILL PEAK IN THE LATE MORNING THROUGH MID AFTERNOON THEN DECREASE IN THE EVENING. RELATIVE HUMIDITY WILL DROP BELOW 15 PERCENT BY NOON...AND SHOULD BEGIN TO RECOVER LATE IN THE EVENING. * WIND...NORTH WINDS 25 TO 35 MPH WITH GUSTS OF 40 TO 50 MPH. * HUMIDITY...7 TO 12 PERCENT. * IMPACTS...THE COMBINATION OF STRONG WINDS...LOW HUMIDITY AND DRY FUELS WILL CREATE CONDITIONS FAVORABLE FOR EXTREME FIRE BEHAVIOR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING OR ARE IMMINENT. PLEASE ADVISE THE APPROPRIATE FIRE WEATHER OFFICIALS IN THE FIELD OF THIS RED FLAG WARNING. && $$ HTTP://WEATHER.GOV/LASVEGAS
305 WWUS85 KVEF 021933 RFWVEF URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE LAS VEGAS NV 1133 AM PST FRI MAR 2 2012 AZZ101-CAZ229-NVZ466-030300- /O.CON.KVEF.FW.W.0001.000000T0000Z-120303T0300Z/ LAKE MEAD NRA/COLORADO RIVER-AZ SIDE-LOWER COLORADO RIVER VALLEY- LAKE MEAD NRA/COLORADO RIVER-NV SIDE- 1133 AM PST FRI MAR 2 2012 /1233 PM MST FRI MAR 2 2012/ ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM PST /8 PM MST/ THIS EVENING FOR STRONG WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 101...229 AND 466... A RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM PST /8 PM MST/ THIS EVENING FOR THE COLORADO RIVER VALLEY DUE TO STRONG NORTH WINDS AND LOW RELATIVE HUMIDITY. * AFFECTED AREA...IN ARIZONA...FIRE WEATHER ZONE 101 LAKE MEAD NRA/COLORADO RIVER-AZ SIDE. IN CALIFORNIA...FIRE WEATHER ZONE 229 LOWER COLORADO RIVER VALLEY. IN NEVADA...FIRE WEATHER ZONE 466 LAKE MEAD NRA/COLORADO RIVER-NV SIDE. * TIMING...GUSTY NORTH WINDS ARE EXPECTED TO CONTINUE THROUGH THIS AFTERNOON THEN DECREASE THIS EVENING. RELATIVE HUMIDITY WILL REMAIN BELOW 15 PERCENT THIS AFTERNOON AND BEGIN TO RECOVER LATE IN THE EVENING. * WIND...NORTH WINDS 25 TO 35 MPH WITH GUSTS OF 45 MPH. * HUMIDITY...7 TO 12 PERCENT. * IMPACTS...THE COMBINATION OF STRONG WINDS...LOW HUMIDITY AND DRY FUELS WILL CREATE CONDITIONS FAVORABLE FOR EXTREME FIRE BEHAVIOR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING OR ARE IMMINENT. PLEASE ADVISE THE APPROPRIATE FIRE WEATHER OFFICIALS IN THE FIELD OF THIS RED FLAG WARNING. && $$ HTTP://WEATHER.GOV/LASVEGAS
139 WWUS85 KVEF 030248 RFWVEF URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE LAS VEGAS NV 648 PM PST FRI MAR 2 2012 AZZ101-CAZ229-NVZ466-030400- /O.EXP.KVEF.FW.W.0001.000000T0000Z-120303T0300Z/ LAKE MEAD NRA/COLORADO RIVER-AZ SIDE-LOWER COLORADO RIVER VALLEY- LAKE MEAD NRA/COLORADO RIVER-NV SIDE- 648 PM PST FRI MAR 2 2012 /748 PM MST FRI MAR 2 2012/ ...RED FLAG WARNING WILL EXPIRE AT 7 PM PST /8 PM MST/ THIS EVENING FOR STRONG WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 101...229 AND 466... THE RED FLAG WARNING WILL EXPIRE AT 7 PM PST /8 PM MST/ THIS EVENING FOR THE COLORADO RIVER VALLEY. AUTOMATED WEATHER STATIONS INDICATE WIND SPEEDS ARE ON THE DECREASE WHILE RELATIVE HUMIDITY VALUES ARE ON THE RISE. THE RED FLAG WARNING WILL BE ALLOWED TO EXPIRE. $$ HTTP://WEATHER.GOV/LASVEGAS PIERCE
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 1, 4:04 PM MST | Wind Advisory | VEF | Mohave | 24 hr |
| Feb 29, 10:17 PM MST | Wind Advisory | VEF | Esmeralda, Nye | 7 hr |
Nearby
Red Flag Warnings in Arizona, 2012Red Flag Warnings in Nevada, 2012Red Flag Warnings in California, 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.