Alert archive / Nevada / Red Flag Warnings in 2012

Red Flag Warning 3, NWS Las Vegas, NV

March 7, 2012Clark County, Nevada; Mohave County, Arizona; San Bernardino County, California

NWS Las Vegas, NV issued this red flag warning at Mar 7, 2012, 2:31 PM PST for Clark County, Nevada; Mohave County, Arizona; San Bernardino County, California. It took effect at Mar 8, 2012, 10:00 AM PST. It was in force for 8 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 7, 2012, 2:31 PM PST (22:31 UTC)
In effect from: Mar 8, 2012, 10:00 AM PST
Expired: Mar 8, 2012, 6:04 PM PST
In force: 8 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 22:32 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, 10.5 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2477 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: -90 m²/s²
0-3 km storm-relative helicity: -62 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

142 
WWUS85 KVEF 072231
RFWVEF

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE LAS VEGAS NV
231 PM PST WED MAR 7 2012

AZZ101-CAZ229-NVZ466-080645-
/O.NEW.KVEF.FW.W.0003.120308T1800Z-120309T0300Z/
LAKE MEAD NRA/COLORADO RIVER-AZ SIDE-LOWER COLORADO RIVER VALLEY-
LAKE MEAD NRA/COLORADO RIVER-NV SIDE-
231 PM PST WED MAR 7 2012 /331 PM MST WED MAR 7 2012/

...RED FLAG WARNING IN EFFECT FROM 10 AM PST /11 AM MST/ TO 7 PM
PST /8 PM MST/ THURSDAY 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 PST /11 AM MST/ TO 7 PM PST /8 PM MST/
THURSDAY FOR THE LAKE MEAD NATIONAL RECREATION AREA AND THE LOWER
COLORADO RIVER VALLEY.

* 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 BY LATE MORNING AND CONTINUE
  INTO THE EARLY EVENING.

* WIND...NORTH 20 TO 25 MPH WITH GUSTS TO AROUND 35 MPH.

* HUMIDITY...8 TO 10 PERCENT.

* IMPACTS...THE COMBINATION OF STRONG WINDS...LOW HUMIDITY AND DRY
  FUELS WILL CREATE CONDITIONS THAT ARE 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

4 follow-up statements

952 
WWUS85 KVEF 080513
RFWVEF

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE LAS VEGAS NV
913 PM PST WED MAR 7 2012

AZZ101-CAZ229-NVZ466-081830-
/O.CON.KVEF.FW.W.0003.120308T1800Z-120309T0300Z/
LAKE MEAD NRA/COLORADO RIVER-AZ SIDE-LOWER COLORADO RIVER VALLEY-
LAKE MEAD NRA/COLORADO RIVER-NV SIDE-
913 PM PST WED MAR 7 2012 /1013 PM MST WED MAR 7 2012/

...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM PST /11 AM MST/
TO 7 PM PST /8 PM MST/ THURSDAY 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/
TO 7 PM PST /8 PM MST/ THURSDAY FOR THE LAKE MEAD NATIONAL
RECREATION AREA AND THE COLORADO RIVER VALLEY.

* 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 BY LATE MORNING AND 
  CONTINUE INTO THE EARLY EVENING. 

* WIND...NORTH 20 TO 25 MPH WITH GUSTS TO AROUND 35 MPH.

* HUMIDITY...8 TO 10 PERCENT.

* IMPACTS...THE COMBINATION OF STRONG WINDS...LOW HUMIDITY AND 
  DRY FUELS WILL CREATE CONDITIONS THAT ARE 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

285 
WWUS85 KVEF 081414
RFWVEF

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE LAS VEGAS NV
614 AM PST THU MAR 8 2012

AZZ101-CAZ229-NVZ466-090000-
/O.CON.KVEF.FW.W.0003.120308T1800Z-120309T0300Z/
LAKE MEAD NRA/COLORADO RIVER-AZ SIDE-LOWER COLORADO RIVER VALLEY-
LAKE MEAD NRA/COLORADO RIVER-NV SIDE-
614 AM PST THU MAR 8 2012 /714 AM MST THU MAR 8 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 THE LAKE
MEAD NATIONAL RECREATION AREA AND THE COLORADO RIVER VALLEY..

* 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 BY LATE MORNING AND 
  CONTINUE INTO THE EARLY EVENING BEFORE DECREASING. 

* WIND...NORTH 20 TO 25 MPH WITH GUSTS TO AROUND 35 MPH.

* HUMIDITY...8 TO 10 PERCENT.

* IMPACTS...THE COMBINATION OF STRONG WINDS...LOW HUMIDITY AND 
  DRY FUELS WILL CREATE CONDITIONS THAT ARE 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

904 
WWUS85 KVEF 082306
RFWVEF

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE LAS VEGAS NV
306 PM PST THU MAR 8 2012

AZZ101-CAZ229-NVZ466-090300-
/O.CON.KVEF.FW.W.0003.000000T0000Z-120309T0300Z/
LAKE MEAD NRA/COLORADO RIVER-AZ SIDE-LOWER COLORADO RIVER VALLEY-
LAKE MEAD NRA/COLORADO RIVER-NV SIDE-
306 PM PST THU MAR 8 2012 /406 PM MST THU MAR 8 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 STRONG NORTH WINDS AND LOW RELATIVE HUMDITY.

* 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...LITTLE CHANGE IN WINDS AND HUMIDITY LEVELS EXPECTED
  THROUGH 7 PM PST.

* WIND...NORTH 20 TO 25 MPH WITH GUSTS TO AROUND 35 MPH.

* HUMIDITY...8 TO 10 PERCENT.

* IMPACTS...THE COMBINATION OF STRONG WINDS...LOW HUMIDITY AND 
  DRY FUELS WILL CREATE CONDITIONS THAT ARE 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 090204
RFWVEF

URGENT - FIRE WEATHER MESSAGE
NATIONAL WEATHER SERVICE LAS VEGAS NV
604 PM PST THU MAR 8 2012

AZZ101-CAZ229-NVZ466-090315-
/O.CAN.KVEF.FW.W.0003.000000T0000Z-120309T0300Z/
LAKE MEAD NRA/COLORADO RIVER-AZ SIDE-LOWER COLORADO RIVER VALLEY-
LAKE MEAD NRA/COLORADO RIVER-NV SIDE-
604 PM PST THU MAR 8 2012 /704 PM MST THU MAR 8 2012/

...RED FLAG WARNING IS CANCELLED FOR FIRE WEATHER ZONES 101 - 229
AND 466...

THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS CANCELLED THE RED
FLAG WARNING FOR THE LAKE MEAD NATIONAL RECREATION AREA AND THE
COLORADO RIVER VALLEY.

WINDS HAD SUBSIDED EARLY THIS EVENING...SO THE RED FLAG WARNING
HAS BEEN CANCELLED.

$$

MORGAN

HTTP://WEATHER.GOV/LASVEGAS

Nearby

Red Flag Warnings in Nevada, 2012 Red Flag Warnings in Arizona, 2012 Red Flag Warnings in California, 2012 Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.