Alert archive / California / Red Flag Warnings in 2011
Red Flag Warning 19, NWS Las Vegas, NV
NWS Las Vegas, NV issued this red flag warning at Nov 1, 2011, 10:17 PM PDT for San Bernardino County, California; Mohave County, Arizona; Clark County, Nevada. It took effect at Nov 2, 2011, 8:00 AM PDT. It was in force for 9 hr. 3 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
- Nov 1, 2011, 10:17 PM PDT (05:17 UTC)
- In effect from
- Nov 2, 2011, 8:00 AM PDT
- Expired
- Nov 2, 2011, 5:00 PM PDT
- 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 05:17 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 |
|---|---|---|---|
| Nov 2, 8:30 AM PDT | NON-TSTM WND GST 55 | Needles Airport, CA | |
| Nov 2, 9:55 AM PDT | NON-TSTM WND GST 52 | Bullhead City Airport, AZ | |
| Nov 2, 10:10 AM PDT | NON-TSTM WND DMG | 2 Nne Needles, CA | A SPOTTER REPORTED A FEW MEDIUM SIZED BRANCHES BROKE OFF TREES IN NEEDLES. |
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, 5.3 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
- 4003 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- -55 m²/s²
- 0-3 km storm-relative helicity
- 202 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
104 WWUS85 KVEF 020517 RFWVEF URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE LAS VEGAS NV 1017 PM PDT TUE NOV 1 2011 AZZ101-CAZ229-NVZ466-021600- /O.NEW.KVEF.FW.W.0019.111102T1500Z-111103T0000Z/ LAKE MEAD NRA/COLORADO RIVER-AZ SIDE-LOWER COLORADO RIVER VALLEY- LAKE MEAD NRA/COLORADO RIVER-NV SIDE- 1017 PM PDT TUE NOV 1 2011 /1017 PM MST TUE NOV 1 2011/ ...RED FLAG WARNING IN EFFECT FROM 8 AM PDT /8 AM MST/ TO 5 PM PDT /5 PM MST/ WEDNESDAY 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 STRONG WINDS AND LOW RELATIVE HUMIDITY...WHICH IS IN EFFECT FROM 8 AM PDT /8 AM MST/ TO 5 PM PDT /5 PM MST/ WEDNESDAY. * 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...AFTER SOMEWHAT OF A LULL IN WINDS OVERNIGHT...NORTH WINDS WILL INCREASE AGAIN BY MID WEDNESDAY MORNING...PEAKING BETWEEN 10 AM AND 2 PM BEFORE DIMINISHING LATE AFTERNOON. * WIND...NORTH WINDS 20 TO 30 MPH WITH GUSTS TO 45 MPH. * HUMIDITY...MAINLY BETWEEN 6 AND 12 PERCENT FROM MID MORNING THROUGH LATE AFTERNOON. * 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. && $$ HTTP://WEATHER.GOV/LASVEGAS
2 follow-up statements
773 WWUS85 KVEF 021429 RFWVEF URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE LAS VEGAS NV 729 AM PDT WED NOV 2 2011 AZZ101-CAZ229-NVZ466-030000- /O.CON.KVEF.FW.W.0019.111102T1500Z-111103T0000Z/ LAKE MEAD NRA/COLORADO RIVER-AZ SIDE-LOWER COLORADO RIVER VALLEY- LAKE MEAD NRA/COLORADO RIVER-NV SIDE- 729 AM PDT WED NOV 2 2011 /729 AM MST WED NOV 2 2011/ ...RED FLAG WARNING IN EFFECT FROM 8 AM PDT/ 8 AM MST UNTIL 5 PM PDT /5 PM MST/ THIS AFTERNOON FOR STRONG WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 101...229 AND 466... A RED FLAG WARNING REMAINS IN EFFECT UNTIL 5 PM PDT /5 PM MST/ THIS AFTERNOON. * AFFECTED AREA...IN ARIZONA...FIRE WEATHER ZONE 101 LAKE MEAD NRA/COLORADO RIVER-AZ SIDE. IN CALIFORNIA...FIRE WEATHER ZONE 229 LOWER COLORADO RIVER VALLEY. IN NEVADA...FIRE WEATHER ZONE 466 LAKE MEAD NRA/COLORADO RIVER-NV SIDE. * TIMING...NORTH WINDS WILL INCREASE THIS MORNING...PEAKING BETWEEN 10 AM AND 2 PM BEFORE DIMINISHING IN THE LATE AFTERNOON. * WIND...NORTH WINDS 20 TO 30 MPH WITH GUSTS TO 45 MPH. ISOLATED HIGHER GUSTS ARE POSSIBLE IN NORTH WIND PRONE AREAS. * HUMIDITY...MAINLY BETWEEN 6 AND 12 PERCENT FROM MID MORNING THROUGH LATE AFTERNOON. * IMPACTS...THE COMBINATION OF STRONG WINDS...LOW HUMIDITY AND DRY FUELS WILL CREATE CONDITIONS FAVORABLE FOR EXTREME FIRE BEHAVIOR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING OR ARE IMMINENT. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL CREATE EXTREME FIRE GROWTH POTENTIAL. && $$ HTTP://WEATHER.GOV/LASVEGAS
356 WWUS85 KVEF 022340 RFWVEF URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE LAS VEGAS NV 440 PM PDT WED NOV 2 2011 AZZ101-CAZ229-NVZ466-030045- /O.EXP.KVEF.FW.W.0019.000000T0000Z-111103T0000Z/ LAKE MEAD NRA/COLORADO RIVER-AZ SIDE-LOWER COLORADO RIVER VALLEY- LAKE MEAD NRA/COLORADO RIVER-NV SIDE- 440 PM PDT WED NOV 2 2011 /440 PM MST WED NOV 2 2011/ ...RED FLAG WARNING WILL EXPIRE AT 5 PM PDT /5 PM MST/ THIS AFTERNOON FOR STRONG WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 101...229 AND 466... THE RED FLAG WARNING WILL EXPIRE AT 5 PM PDT /5 PM MST/ THIS AFTERNOON. WINDS WERE DECREASING EARLY THIS EVENING AND GUSTS WERE BELOW 35 MPH AS OF 1630. WINDS WILL CONTINUE TO DECREASE THROUGH THE EVENING. RELATIVE HUMIDITY WAS STILL PRETTY LOW EARLY THIS EVENING BUT WILL INCREASE TO ABOVE 20 PERCENT LATER THIS EVENING. $$ HTTP://WEATHER.GOV/LASVEGAS
Nearby
Red Flag Warnings in California, 2011Red Flag Warnings in Arizona, 2011Red Flag Warnings in Nevada, 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.