Alert archive / Arizona / Red Flag Warnings in 2014
Red Flag Warning 4, NWS Las Vegas, NV
NWS Las Vegas, NV issued this red flag warning at Mar 17, 2014, 2:49 PM MST for Mohave County, Arizona; San Bernardino County, California; Clark County, Nevada. It took effect at Mar 18, 2014, 2:59 AM MST. It was in force for 16 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
- Mar 17, 2014, 2:49 PM MST (21:49 UTC)
- In effect from
- Mar 18, 2014, 2:59 AM MST
- Expired
- Mar 18, 2014, 7:00 PM MST
- In force
- 16 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 21:53 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
Las Vegas, NV (KVEF), launched 12:00Z, 9.8 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
- 4036 m above ground
- 0-6 km bulk shear
- 53 kt
- 0-1 km storm-relative helicity
- 85 m²/s²
- 0-3 km storm-relative helicity
- 212 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
071 WWUS85 KVEF 172149 RFWVEF URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE LAS VEGAS NV 249 PM PDT MON MAR 17 2014 .CRITICAL FIRE WEATHER CONDITIONS ARE EXPECTED TONIGHT THROUGH TUESDAY AFTERNOON IN THE COLORADO RIVER VALLEY AS NORTH WINDS DEVELOP BEHIND A COLD FRONT. DRIER ARE WILL ALSO MOVE INTO THE REGION BEHIND THE FRONT. AZZ101-CAZ229-NVZ466-181000- /O.NEW.KVEF.FW.W.0004.140318T1500Z-140318T2200Z/ LAKE MEAD NRA/COLORADO RIVER-AZ SIDE-LOWER COLORADO RIVER VALLEY- LAKE MEAD NRA/COLORADO RIVER-NV SIDE- 249 PM PDT MON MAR 17 2014 /249 PM MST MON MAR 17 2014/ ...RED FLAG WARNING IN EFFECT FROM 8 AM PDT /8 AM MST/ TO 3 PM PDT /3 PM MST/ TUESDAY 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 3 PM PDT /3 PM MST/ TUESDAY. * 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 BEGIN TO DEVELOP LATER THIS EVENING AND CONTINUE TO STRENGTHEN OVERNIGHT. WINDS ARE EXPECTED TO BE AT THERE STRONGEST DURING THE MORNING HOURS...BETWEEN 8 AM AND NOON. WINDS WILL THEN GRADUALLY DIMINISH DURING THE AFTERNOON HOURS. * WIND...NORTH WINDS AT 20 TO 30 MPH WITH GUSTS TO 40 MPH. * HUMIDITY...15 PERCENT OR LESS. RELATIVE HUMIDITY ARE EXPECTED TO FALL BELOW 15 PERCENT BY 8 AM...AND THEN FALL INTO THE SINGLE DIGITS BY LATE MORNING AND REMAIN IN THE SINGLE DIGITS THROUGHOUT THE AFTERNOON. * IMPACTS...THE COMBINATION OF GUSTY WINDS...LOW RELATIVE HUMIDITY AND DRY FUELS CAN CREATE CONDITIONS THAT ARE FAVORABLE FOR ERRATIC FIRE BEHAVIOR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING OR IMMINENT. PLEASE ADVISE THE APPROPRIATE FIRE WEATHER OFFICIALS IN THE FIELD OF THIS RED FLAG WARNING. && $$ HTTP://WEATHER.GOV/LASVEGAS
4 follow-up statements
986 WWUS85 KVEF 180959 RFWVEF URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE LAS VEGAS NV 259 AM PDT TUE MAR 18 2014 AZZ101-CAZ229-NVZ466-181800- /O.EXT.KVEF.FW.W.0004.140318T0959Z-140318T2200Z/ LAKE MEAD NRA/COLORADO RIVER-AZ SIDE-LOWER COLORADO RIVER VALLEY- LAKE MEAD NRA/COLORADO RIVER-NV SIDE- 259 AM PDT TUE MAR 18 2014 /259 AM MST TUE MAR 18 2014/ ...RED FLAG WARNING NOW IN EFFECT UNTIL 3 PM PDT /3 PM MST/ THIS AFTERNOON FOR STRONG WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 101...229 AND 466... * AFFECTED AREA...IN ARIZONA...FIRE WEATHER ZONE 101 LAKE MEAD NRA/COLORADO RIVER-AZ SIDE. IN CALIFORNIA...FIRE WEATHER ZONE 229 LOWER COLORADO RIVER VALLEY. IN NEVADA...FIRE WEATHER ZONE 466 LAKE MEAD NRA/COLORADO RIVER-NV SIDE. * TIMING...NORTH WINDS WILL PERSIST AND ARE EXPECTED TO BE AT THERE STRONGEST UNTIL NOON TODAY. WINDS WILL THEN GRADUALLY DIMINISH DURING THE AFTERNOON HOURS. * WIND...NORTH WINDS AT 20 TO 30 MPH WITH GUSTS TO 40 MPH. * HUMIDITY...RELATIVE HUMIDITY VALUES DROPPED TO LESS THAN 15 PERCENT OVERNIGHT AND WILL FALL INTO THE SINGLE DIGITS BY LATE MORNING AND REMAIN IN THE SINGLE DIGITS THROUGHOUT THE AFTERNOON. * IMPACTS...THE COMBINATION OF GUSTY WINDS...LOW RELATIVE HUMIDITY AND DRY FUELS CAN CREATE CONDITIONS THAT ARE FAVORABLE FOR ERRATIC FIRE BEHAVIOR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING OR IMMINENT. PLEASE ADVISE THE APPROPRIATE FIRE WEATHER OFFICIALS IN THE FIELD OF THIS RED FLAG WARNING. && $$ HTTP://WEATHER.GOV/LASVEGAS
036 WWUS85 KVEF 181735 RFWVEF URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE LAS VEGAS NV 1035 AM PDT TUE MAR 18 2014 AZZ101-CAZ229-NVZ466-182200- /O.CON.KVEF.FW.W.0004.000000T0000Z-140318T2200Z/ LAKE MEAD NRA/COLORADO RIVER-AZ SIDE-LOWER COLORADO RIVER VALLEY- LAKE MEAD NRA/COLORADO RIVER-NV SIDE- 1035 AM PDT TUE MAR 18 2014 /1035 AM MST TUE MAR 18 2014/ ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 3 PM PDT /3 PM MST/ THIS AFTERNOON FOR STRONG WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 101...229 AND 466... * 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 PERSIST INTO THE AFTERNOON HOURS THEN GRADUALLY DIMINISH. * WIND...NORTH WINDS AT 20 TO 30 MPH WITH GUSTS TO 40 MPH. * HUMIDITY...SINGLE DIGITS THROUGH THE AFTERNOON. * IMPACTS...THE COMBINATION OF GUSTY WINDS...LOW RELATIVE HUMIDITY AND DRY FUELS CAN CREATE CONDITIONS THAT ARE FAVORABLE FOR ERRATIC FIRE BEHAVIOR AND RAPID FIRE GROWTH. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING OR IMMINENT. PLEASE ADVISE THE APPROPRIATE FIRE WEATHER OFFICIALS IN THE FIELD OF THIS RED FLAG WARNING. && $$ HTTP://WEATHER.GOV/LASVEGAS
442 WWUS85 KVEF 182150 RFWVEF URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE LAS VEGAS NV 250 PM PDT TUE MAR 18 2014 AZZ101-CAZ229-NVZ466-190200- /O.EXT.KVEF.FW.W.0004.000000T0000Z-140319T0200Z/ LAKE MEAD NRA/COLORADO RIVER-AZ SIDE-LOWER COLORADO RIVER VALLEY- LAKE MEAD NRA/COLORADO RIVER-NV SIDE- 250 PM PDT TUE MAR 18 2014 /250 PM MST TUE MAR 18 2014/ ...RED FLAG WARNING NOW IN EFFECT UNTIL 7 PM PDT /7 PM MST/ THIS EVENING FOR STRONG WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 101...229 AND 466... * AFFECTED AREA...IN ARIZONA...FIRE WEATHER ZONE 101 LAKE MEAD NRA/COLORADO RIVER-AZ SIDE. IN CALIFORNIA...FIRE WEATHER ZONE 229 LOWER COLORADO RIVER VALLEY. IN NEVADA...FIRE WEATHER ZONE 466 LAKE MEAD NRA/COLORADO RIVER-NV SIDE. * TIMING...NORTH WINDS WILL PERSIST THROUGH THE AFTERNOON HOURS THEN DIMINISH THIS EVENING. * WIND...NORTH WINDS AT 20 TO 30 MPH WITH GUSTS TO AROUND 35 MPH. * HUMIDITY...SINGLE DIGITS THROUGH THE AFTERNOON. * IMPACTS...THE COMBINATION OF GUSTY WINDS...LOW RELATIVE HUMIDITY AND DRY FUELS CAN CREATE CONDITIONS THAT ARE FAVORABLE FOR ERRATIC FIRE BEHAVIOR AND RAPID FIRE GROWTH. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING OR IMMINENT. PLEASE ADVISE THE APPROPRIATE FIRE WEATHER OFFICIALS IN THE FIELD OF THIS RED FLAG WARNING. && $$ HTTP://WEATHER.GOV/LASVEGAS
971 WWUS85 KVEF 190139 RFWVEF URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE LAS VEGAS NV 639 PM PDT TUE MAR 18 2014 AZZ101-CAZ229-NVZ466-190245- /O.EXP.KVEF.FW.W.0004.000000T0000Z-140319T0200Z/ LAKE MEAD NRA/COLORADO RIVER-AZ SIDE-LOWER COLORADO RIVER VALLEY- LAKE MEAD NRA/COLORADO RIVER-NV SIDE- 639 PM PDT TUE MAR 18 2014 /639 PM MST TUE MAR 18 2014/ ...RED FLAG WARNING WILL EXPIRE AT 7 PM PDT /7 PM MST/ THIS EVENING FOR STRONG WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 101...229 AND 466... ALTHOUGH RELATIVE HUMIDITY RECOVERY WILL BE POOR BETWEEN 15 AND 20 PERCENT TONIGHT...NORTH WINDS WILL DIMINISH AND GENERALLY BE 5 TO 15 MPH AROUND LAKE MEAD. NORTH WINDS WILL BE 10 TO 20 MPH SOUTH OF HOOVER DAM. THE RED FLAG WARNING WILL BE ALLOWED TO EXPIRE AT 7 PM PDT /7 PM MST/. $$ 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 |
|---|---|---|---|---|
| Mar 17, 2:36 PM MST | Wind Advisory | VEF | Mohave | 24 hr |
| Mar 17, 8:40 AM MST | High Wind Warning | VEF | Inyo | 4 hr |
Nearby
Red Flag Warnings in Arizona, 2014Red Flag Warnings in California, 2014Red Flag Warnings in Nevada, 2014Every red flag warning in 2014
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.