Alert archive / California / Red Flag Warnings in 2014
Red Flag Warning 2, NWS Las Vegas, NV
NWS Las Vegas, NV issued this red flag warning at Mar 10, 2014, 4:42 AM PDT for San Bernardino County, California; Clark County, Nevada; Mohave County, Arizona. It took effect at Mar 11, 2014, 5:00 AM PDT. 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 10, 2014, 4:42 AM PDT (11:42 UTC)
- In effect from
- Mar 11, 2014, 5:00 AM PDT
- Expired
- Mar 11, 2014, 9:00 PM PDT
- 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 11:42 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 00:00Z, 11.7 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
- 4089 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- -5 m²/s²
- 0-3 km storm-relative helicity
- -25 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
706 WWUS85 KVEF 101142 RFWVEF URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE LAS VEGAS NV 442 AM PDT MON MAR 10 2014 .A COLD FRONT IS FORECAST TO MOVE SOUTH THROUGH THE REGION TONIGHT. STRONG NORTHERLY WINDS ALONG WITH DRIER AIR WILL DEVELOP BEHIND THE FRONT. AZZ101-CAZ229-NVZ466-111200- /O.UPG.KVEF.FW.A.0002.140311T1700Z-140312T0400Z/ /O.NEW.KVEF.FW.W.0002.140311T1700Z-140312T0400Z/ LAKE MEAD NRA/COLORADO RIVER-AZ SIDE-LOWER COLORADO RIVER VALLEY- LAKE MEAD NRA/COLORADO RIVER-NV SIDE- 442 AM PDT MON MAR 10 2014 /442 AM MST MON MAR 10 2014/ ...RED FLAG WARNING IN EFFECT FROM 10 AM PDT /10 AM MST/ TO 9 PM PDT /9 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 10 AM PDT /10 AM MST/ TO 9 PM PDT /9 PM MST/ TUESDAY. THE FIRE WEATHER WATCH IS NO LONGER 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 466 LAKE MEAD NRA/COLORADO RIVER-NV SIDE. * TIMING...GUSTY NORTH WINDS ARE EXPECTED BEHIND A COLD FRONT THAT IS FORECAST TO MOVE THROUGH THE REGION TONIGHT. WINDS ARE EXPECTED TO REALLY INCREASE TUESDAY MORNING IN THE COLORADO RIVER VALLEY SOUTH OF HOOVER DAM AND CONTINUE INTO TUESDAY EVENING. RELATIVE HUMIDITY VALUES WILL DROP BELOW 15 PERCENT LATE TUESDAY MORNING AND REMAIN BELOW 15 PERCENT UNTIL TUESDAY EVENING. * WIND...NORTH WINDS 20 TO 35 MPH WITH GUSTS AROUND 45 MPH. * HUMIDITY...10-15 PERCENT. * IMPACTS...THE COMBINATION OF GUSTY WINDS...LOW RELATIVE HUMIDITY AND DRY FUELS CAN CREATE CONDITIONS THAT ARE FAVORABLE FOR EXTREME 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. && $$ HTTP://WEATHER.GOV/LASVEGAS
2 follow-up statements
658 WWUS85 KVEF 111143 RFWVEF URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE LAS VEGAS NV 443 AM PDT TUE MAR 11 2014 AZZ101-CAZ229-NVZ466-120400- /O.EXT.KVEF.FW.W.0002.140311T1200Z-140312T0400Z/ LAKE MEAD NRA/COLORADO RIVER-AZ SIDE-LOWER COLORADO RIVER VALLEY- LAKE MEAD NRA/COLORADO RIVER-NV SIDE- 443 AM PDT TUE MAR 11 2014 /443 AM MST TUE MAR 11 2014/ ...RED FLAG WARNING NOW IN EFFECT UNTIL 9 PM PDT /9 PM MST/ THIS EVENING FOR STRONG WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 101...229 AND 466... * AFFECTED AREA...IN ARIZONA...FIRE WEATHER ZONE 101 LAKE MEAD NRA/COLORADO RIVER-AZ SIDE. IN CALIFORNIA...FIRE WEATHER ZONE 229 LOWER COLORADO RIVER VALLEY. IN NEVADA...FIRE WEATHER ZONE 466 LAKE MEAD NRA/COLORADO RIVER-NV SIDE. * TIMING...GUSTY NORTH WINDS HAVE DEVELOPED BEHIND A COLD FRONT. WINDS ARE EXPECTED TO INCREASE FURTHER THIS MORNING IN THE COLORADO RIVER VALLEY MAINLY SOUTH OF HOOVER DAM AND CONTINUE INTO THE EVENING. SOME RELATIVE HUMIDITY READINGS MAY ALREADY BE BELOW 15 PERCENT OR ARE FORECAST TO DROP BELOW BELOW 15 PERCENT THIS MORNING AND REMAIN THERE UNTIL THIS EVENING. * WIND...NORTH WINDS 20 TO 35 MPH WITH GUSTS AROUND 45 MPH. * HUMIDITY...8-15 PERCENT. * IMPACTS...THE COMBINATION OF GUSTY WINDS...LOW RELATIVE HUMIDITY AND DRY FUELS CAN CREATE CONDITIONS THAT ARE FAVORABLE FOR EXTREME FIRE BEHAVIOR. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING OR IMMINENT. PLEASE ADVISE THE APPROPRIATE FIRE WEATHER OFFICIALS IN THE FIELD OF THIS RED FLAG WARNING. && $$ HTTP://WEATHER.GOV/LASVEGAS
567 WWUS85 KVEF 120334 RFWVEF URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE LAS VEGAS NV 834 PM PDT TUE MAR 11 2014 AZZ101-CAZ229-NVZ466-120445- /O.EXP.KVEF.FW.W.0002.000000T0000Z-140312T0400Z/ LAKE MEAD NRA/COLORADO RIVER-AZ SIDE-LOWER COLORADO RIVER VALLEY- LAKE MEAD NRA/COLORADO RIVER-NV SIDE- 834 PM PDT TUE MAR 11 2014 /834 PM MST TUE MAR 11 2014/ ...RED FLAG WARNING WILL EXPIRE AT 9 PM PDT /9 PM MST/ THIS EVENING FOR STRONG WINDS AND LOW RELATIVE HUMIDITY FOR FIRE WEATHER ZONES 101...229 AND 466... THE RED FLAG WARNING WILL BE ALLOWED TO EXPIRE ON TIME. RELATIVE HUMIDITY VALUES REMAIN BELOW 15 PERCENT OVERALL BUT WINDS HAVE SUBSIDED AND RED FLAG CONDITIONS ARE NO LONGER OCCURRING OR EXPECTED TONIGHT. $$ 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 10, 3:00 AM PDT | Wind Advisory | VEF | San Bernardino | 39 hr |
Nearby
Red Flag Warnings in California, 2014Red Flag Warnings in Nevada, 2014Red Flag Warnings in Arizona, 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.