Alert archive / Nevada / Red Flag Warnings in 2011
Red Flag Warning 18, NWS Las Vegas, NV
NWS Las Vegas, NV issued this red flag warning at Oct 25, 2011, 2:02 PM MST for Mohave County, Arizona; Clark County, Lincoln County, Nevada; San Bernardino County, California. It took effect at Oct 26, 2011, 10:00 AM MST. It was in force for 10 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
- Oct 25, 2011, 2:02 PM MST (21:02 UTC)
- In effect from
- Oct 26, 2011, 10:00 AM MST
- Expired
- Oct 26, 2011, 8:00 PM MST
- In force
- 10 hr
- Issued by
- NWS Las Vegas, NV
Counties Mohave County, AZ, San Bernardino County, CA, Clark County, NV, Lincoln County, NV
The radar
The Las Vegas radar (KESX), 45 km from the middle of the area, began a volume at 21:04 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 |
|---|---|---|---|
| Oct 26, 1:46 PM MST | NON-TSTM WND GST 47 | 4 Ene Bullhead City, AZ | A TRAINED SPOTTER REPORTED A WIND GUST OF 47 MPH. |
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 12:00Z, 9.0 hours before the alert went out and 61 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
- 3725 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 62 m²/s²
- 0-3 km storm-relative helicity
- 55 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
174 WWUS85 KVEF 252102 RFWVEF URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE LAS VEGAS NV 202 PM PDT TUE OCT 25 2011 AZZ101-CAZ229-NVZ461-466-261100- /O.UPG.KVEF.FW.A.0018.111026T1700Z-111027T0300Z/ /O.NEW.KVEF.FW.W.0018.111026T1700Z-111027T0300Z/ LAKE MEAD NRA/COLORADO RIVER-AZ SIDE-LOWER COLORADO RIVER VALLEY- LINCOLN COUNTY/ELY DISPATCH-LAKE MEAD NRA/COLORADO RIVER-NV SIDE- 202 PM PDT TUE OCT 25 2011 /202 PM MST TUE OCT 25 2011/ ...RED FLAG WARNING IN EFFECT FROM 10 AM TO 8 PM WEDNESDAY FOR STRONG WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 101 - 229 - 461 AND 466... THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A RED FLAG WARNING FOR STRONG WINDS AND LOW RELATIVE HUMIDITY...WHICH IS IN EFFECT FROM 10 AM TO 8 PM WEDNESDAY. THIS REPLACES THE FIRE WEATHER WATCH WHICH HAD BEEN IN EFFECT. * 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 461 LINCOLN COUNTY/ELY DISPATCH AND FIRE WEATHER ZONE 466 LAKE MEAD NRA/COLORADO RIVER-NV SIDE. * TIMING...A STRONG COLD FRONT WILL MOVE THROUGH THE AREA FROM NORTH TO SOUTH TONIGHT THROUGH EARLY WEDNESDAY. NORTH WINDS WILL INCREASE BEHIND THE FRONT AND PERSIST THROUGH EARLY WEDNESDAY EVENING. * WIND...NORTH WIND 20 TO 30 MPH WITH GUSTS 35 TO 45 MPH. THE STRONGEST GUSTS WILL BE DOWN THE COLORADO RIVER VALLEY. * HUMIDITY...MINIMUM HUMIDITY WILL DROP TO 10 TO 15 PERCENT IN LINCOLN COUNTY...AND 6 TO 10 PERCENT DOWN THE COLORADO RIVER VALLEY. * 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. && $$ NVZ465-261100- /O.NEW.KVEF.FW.W.0018.111026T1700Z-111027T0300Z/ CLARK AND SW LINCOLN COUNTY DESERTS/LAS VEGAS DISPATCH- 202 PM PDT TUE OCT 25 2011 ...RED FLAG WARNING IN EFFECT FROM 10 AM TO 8 PM PDT WEDNESDAY FOR STRONG WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONE 465... THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A RED FLAG WARNING FOR STRONG WINDS AND LOW RELATIVE HUMIDITY...WHICH IS IN EFFECT FROM 10 AM TO 8 PM PDT WEDNESDAY. * AFFECTED AREA...IN NEVADA...FIRE WEATHER ZONE 465 CLARK AND SW LINCOLN COUNTY DESERTS/LAS VEGAS DISPATCH. * TIMING...A STRONG COLD FRONT WILL MOVE THROUGH THE AREA FROM NORTH TO SOUTH TONIGHT THROUGH EARLY WEDNESDAY. NORTH WINDS WILL INCREASE BEHIND THE FRONT AND PERSIST THROUGH EARLY WEDNESDAY EVENING. * WIND...NORTH WIND 20 TO 30 MPH WITH GUSTS 35 TO 40 MPH. * HUMIDITY...MINIMUM HUMIDITY WILL DROP TO AROUND 10 PERCENT. * IMPACTS...THE COMBINATION OF STRONG WINDS...LOW HUMIDITY AND DRY FUELS WILL CREATE CONDITIONS FAVORABLE FOR EXTREME FIRE BEHAVIOR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING OR ARE IMMINENT. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL CREATE EXTREME FIRE GROWTH POTENTIAL. && $$ MORGAN HTTP://WEATHER.GOV/LASVEGAS
3 follow-up statements
731 WWUS85 KVEF 261020 RFWVEF URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE LAS VEGAS NV 320 AM PDT WED OCT 26 2011 AZZ101-CAZ229-NVZ461-465-466-261900- /O.CON.KVEF.FW.W.0018.111026T1700Z-111027T0300Z/ LAKE MEAD NRA/COLORADO RIVER-AZ SIDE-LOWER COLORADO RIVER VALLEY- LINCOLN COUNTY/ELY DISPATCH- CLARK AND SW LINCOLN COUNTY DESERTS/LAS VEGAS DISPATCH- LAKE MEAD NRA/COLORADO RIVER-NV SIDE- 320 AM PDT WED OCT 26 2011 /320 AM MST WED OCT 26 2011/ ...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM PDT /10 AM MST/ THIS MORNING TO 8 PM PDT /8 PM MST/ THIS EVENING FOR STRONG WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 101...229... 461...465 AND 466... A RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM PDT /10 AM MST/ THIS MORNING TO 8 PM PDT /8 PM MST/ THIS EVENING. * 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 461 LINCOLN COUNTY/ELY DISPATCH AND FIRE WEATHER ZONE 466 LAKE MEAD NRA/COLORADO RIVER-NV SIDE. * TIMING...A STRONG COLD FRONT MOVED THROUGH THE AREA FROM NORTH TO SOUTH OVERNIGHT. NORTH WINDS WILL INCREASE BEHIND THE FRONT THIS MORNING AND PERSIST THROUGH EARLY THIS EVENING. * WIND...NORTH WIND 20 TO 30 MPH WITH GUSTS 35 TO 45 MPH. THE STRONGEST GUSTS WILL BE DOWN THE COLORADO RIVER VALLEY. * HUMIDITY...MINIMUM HUMIDITY WILL DROP TO 10 TO 15 PERCENT IN LINCOLN COUNTY...AND 6 TO 10 PERCENT DOWN THE COLORADO RIVER VALLEY. * 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. && $$ HTTP://WEATHER.GOV/LASVEGAS
039 WWUS85 KVEF 261820 RFWVEF URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE LAS VEGAS NV 1120 AM PDT WED OCT 26 2011 AZZ101-CAZ229-NVZ461-465-466-270300- /O.CON.KVEF.FW.W.0018.000000T0000Z-111027T0300Z/ LAKE MEAD NRA/COLORADO RIVER-AZ SIDE-LOWER COLORADO RIVER VALLEY- LINCOLN COUNTY/ELY DISPATCH- CLARK AND SW LINCOLN COUNTY DESERTS/LAS VEGAS DISPATCH- LAKE MEAD NRA/COLORADO RIVER-NV SIDE- 1120 AM PDT WED OCT 26 2011 /1120 AM MST WED OCT 26 2011/ ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT /8 PM MST/ THIS EVENING FOR STRONG WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 101 - 229 - 461 - 465 AND 466... A RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM PDT /8 PM MST/ THIS EVENING. * AFFECTED AREA...IN ARIZONA...FIRE WEATHER ZONE 101 LAKE MEAD NRA/COLORADO RIVER-AZ SIDE. IN CALIFORNIA...FIRE WEATHER ZONE 229 LOWER COLORADO RIVER VALLEY. IN NEVADA...FIRE WEATHER ZONE 461 LINCOLN COUNTY/ELY DISPATCH AND FIRE WEATHER ZONE 466 LAKE MEAD NRA/COLORADO RIVER-NV SIDE. * TIMING...A STRONG COLD FRONT MOVED THROUGH THE AREA FROM NORTH TO SOUTH OVERNIGHT. GUSTY NORTH WINDS WILL PERSIST THROUGH EARLY THIS EVENING. * WIND...NORTH WIND 20 TO 25 MPH WITH GUSTS 35 TO 40 MPH. THE STRONGEST GUSTS WILL BE DOWN THE COLORADO RIVER VALLEY. * HUMIDITY...MINIMUM HUMIDITY WILL DROP TO 10 TO 15 PERCENT. * IMPACTS...THE COMBINATION OF STRONG WINDS...LOW HUMIDITY AND DRY FUELS WILL CREATE CONDITIONS FAVORABLE FOR EXTREME FIRE BEHAVIOR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING OR ARE IMMINENT. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL CREATE EXTREME FIRE GROWTH POTENTIAL. && $$ MORGAN HTTP://WEATHER.GOV/LASVEGAS
371 WWUS85 KVEF 270257 RFWVEF URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE LAS VEGAS NV 757 PM PDT WED OCT 26 2011 AZZ101-CAZ229-NVZ461-465-466-270400- /O.EXP.KVEF.FW.W.0018.000000T0000Z-111027T0300Z/ LAKE MEAD NRA/COLORADO RIVER-AZ SIDE-LOWER COLORADO RIVER VALLEY- LINCOLN COUNTY/ELY DISPATCH- CLARK AND SW LINCOLN COUNTY DESERTS/LAS VEGAS DISPATCH- LAKE MEAD NRA/COLORADO RIVER-NV SIDE- 757 PM PDT WED OCT 26 2011 /757 PM MST WED OCT 26 2011/ ...RED FLAG WARNING WILL EXPIRE AT 8 PM PDT /8 PM MST/ THIS EVENING FOR STRONG WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 101...229...461...465 AND 466... THE RED FLAG WARNING WILL EXPIRE AT 8 PM PDT /8 PM MST/ THIS EVENING. WINDS HAVE DECREASED ACROSS THE AREA THIS EVENING AND ARE NO LONGER MEETING THE WIND CRITERIA NEEDED FOR A RED FLAG WARNING. ALTHOUGH THE WINDS HAVE DECREASED...LOCALLY GUSTY WINDS WILL BE SEEN INTO THURSDAY. IN ADDITIONAL VERY DRY AIR WILL ALSO REMAIN IN PLACE WITH OVERNIGHT HUMIDITY RECOVERIES BEING POOR. $$ HTTP://WEATHER.GOV/LASVEGAS
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 25, 2:02 PM MST | Wind Advisory | VEF | Mohave | 30 hr |
Nearby
Red Flag Warnings in Nevada, 2011Red Flag Warnings in Arizona, 2011Red Flag Warnings in California, 2011Every red flag 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.