Alert archive / Nevada / Red Flag Warnings in 2009
Red Flag Warning 21, NWS Las Vegas, NV
NWS Las Vegas, NV issued this red flag warning at Oct 26, 2009, 3:19 PM PDT for Clark County, Lincoln County, Nevada; Mohave County, Arizona; Inyo County, San Bernardino County, California. It took effect at Oct 27, 2009, 10:00 AM PDT. It was in force for 5 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 26, 2009, 3:19 PM PDT (22:19 UTC)
- In effect from
- Oct 27, 2009, 10:00 AM PDT
- Expired
- Oct 27, 2009, 2:41 PM PDT
- In force
- 5 hr
- Issued by
- NWS Las Vegas, NV
Counties Mohave County, AZ, Inyo County, CA, San Bernardino County, CA, Clark County, NV, Lincoln County, NV
The radar
The Las Vegas radar (KESX), 73 km from the middle of the area, began a volume at 22:17 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 |
|---|---|---|---|
| Oct 27, 10:51 AM PDT | HIGH SUST WINDS 42 | N Squaw Springs Raws, CA |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Mercury/Desert R, NV (KDRA), launched 12:00Z, 10.3 hours before the alert went out and 69 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
- 4418 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- -11 m²/s²
- 0-3 km storm-relative helicity
- 61 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WWUS85 KVEF 262219 RFWVEF URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE LAS VEGAS NV 319 PM PDT MON OCT 26 2009 .A STRONG LOW PRESSURE SYSTEM AND ASSOCIATED COLD FRONT WILL MOVE INTO THE AREA TUESDAY AND TUESDAY NIGHT. VERY STRONG WINDS WILL DEVELOP BOTH AHEAD OF AND BEHIND THE COLD FRONT WITH GUSTS TO 60 MPH POSSIBLE. AS THE STORM MOVES EAST OF THE AREA WEDNESDAY...STRONG NORTHERLY WINDS ARE EXPECTED ACROSS THE AREA. MOISTURE ASSOCIATED WITH THIS STORM SYSTEM WILL BE LIMITED MAINLY TO AREAS NORTH AND EAST OF THE WARNING AREA SO RELATIVE HUMIDITY VALUES WILL BE BELOW 15 PERCENT MUCH OF THE TIME FROM LATE TUESDAY MORNING TO WEDNESDAY EVENING. AZZ102-271400- /O.UPG.KVEF.FW.A.0014.091027T1800Z-091028T0300Z/ /O.NEW.KVEF.FW.W.0021.091027T1700Z-091028T0300Z/ NORTHWEST DESERTS/NORTHWEST PLATEAU- 319 PM MST MON OCT 26 2009 ...RED FLAG WARNING IN EFFECT FROM 10 AM TO 8 PM MST TUESDAY... THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A RED FLAG WARNING...WHICH IS IN EFFECT FROM 10 AM TO 8 PM MST TUESDAY FOR THE NORTHWEST DESERTS AND NORTHWEST PLATEAU OF ARIZONA FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY. THE FIRE WEATHER WATCH IS NO LONGER IN EFFECT. SOUTHWEST WINDS WILL INCREASE TO 20 TO 35 MPH BY LATE TUESDAY MORNING WITH GUSTS POSSIBLY AS HIGH AS 60 MPH. WINDS WILL BECOME NORTHERLY EARLY TUESDAY EVENING BEFORE DECREASING TO 10 TO 15 MPH OVERNIGHT. RELATIVE HUMIDITY VALUES WILL BE BELOW 15 PERCENT MUCH OF THE DAY AND INTO THE EVENING AT AND BELOW AROUND 4000 FEET. 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. && $$ AZZ101-CAZ228-229-NVZ465-466-271400- /O.UPG.KVEF.FW.A.0014.091027T1800Z-091028T0300Z/ /O.NEW.KVEF.FW.W.0021.091027T1700Z-091029T0300Z/ LAKE MEAD NRA/COLORADO RIVER-AZ SIDE-MOJAVE DESERT- LOWER COLORADO RIVER VALLEY- CLARK AND SW LINCOLN COUNTY DESERTS/LAS VEGAS DISPATCH- LAKE MEAD NRA/COLORADO RIVER-NV SIDE- 319 PM PDT MON OCT 26 2009 /319 PM MST MON OCT 26 2009/ ...RED FLAG WARNING IN EFFECT FROM 10 AM PDT /10 AM MST/ TUESDAY TO 8 PM PDT /8 PM MST/ WEDNESDAY... THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A RED FLAG WARNING...WHICH IS IN EFFECT FROM 10 AM PDT /10 AM MST/ TUESDAY TO 8 PM PDT /8 PM MST/ WEDNESDAY FOR THE LOWER ELEVATIONS OF CLARK COUNTY...SAN BERNARDINO COUNTY DESERTS AND THE LAKE MEAD NRA AND COLORADO RIVER VALLEY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY. THE FIRE WEATHER WATCH IS NO LONGER IN EFFECT. SOUTHWEST WINDS WILL INCREASE TO 20 TO 35 MPH BY LATE TUESDAY MORNING WITH GUSTS POSSIBLY AS HIGH AS 60 MPH. STRONG NORTHERLY WINDS WILL DEVELOP TUESDAY AFTERNOON AND EVENING AND WILL PERSIST THROUGH WEDNESDAY EVENING. WINDS WILL LIKELY DECREASE FOR A TIME TUESDAY NIGHT BUT WILL PICK BACK UP AGAIN WEDNESDAY MORNING. RELATIVE HUMIDITY VALUES WILL BE BELOW 15 PERCENT OVER MOST OF THE AREA TUESDAY THROUGH WEDNESDAY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING OR ARE IMMINENT. A COMBINATION OF STRONG WINDS...LOW RELATIVE HUMIDITY...AND WARM TEMPERATURES WILL CREATE EXTREME FIRE GROWTH POTENTIAL. && $$ CAZ227-271400- /O.NEW.KVEF.FW.W.0021.091027T1700Z-091029T0300Z/ DEATH VALLEY NATIONAL PARK- 319 PM PDT MON OCT 26 2009 ...RED FLAG WARNING IN EFFECT FROM 10 AM TUESDAY TO 8 PM PDT WEDNESDAY... THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS ISSUED A RED FLAG WARNING...WHICH IS IN EFFECT FROM 10 AM TUESDAY TO 8 PM PDT WEDNESDAY FOR DEATH VALLEY NATIONAL PARK FOR GUSTY WINDS AND LOW RELATIVE HUMIDITY. STRONG WESTERLY WINDS WILL DEVELOP ACROSS SAN BERNARDINO COUNTY TUESDAY MORNING WITH WIDESPREAD GUSTS OVER 40 MPH AND LOCAL GUSTS TO 60 MPH. MEANWHILE...EQUALLY STRONG NORTHERLY WINDS WILL DEVELOP ACROSS THE DEATH VALLEY AREA TUESDAY WHICH WILL SPREAD INTO SAN BERNARDINO COUNTY TUESDAY NIGHT. THESE STRONG NORTHERLY WINDS WILL CONTINUE ACROSS THE ENTIRE AREA WEDNESDAY INTO WEDNESDAY EVENING. IN ADDITION...RELATIVE HUMIDITY VALUES WILL BE BELOW 15 PERCENT MUCH OF THE TIME EXCEPT FOR NORTHERN PORTIONS OF DEATH VALLEY NATIONAL PARK. 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. && $$
2 follow-up statements
000 WWUS85 KVEF 271106 RFWVEF URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE LAS VEGAS NV 406 AM PDT TUE OCT 27 2009 .A STRONG LOW PRESSURE SYSTEM AND ASSOCIATED COLD FRONT WILL MOVE ACROSS THE DISTRICT TODAY. VERY STRONG WINDS WILL DEVELOP BOTH AHEAD OF AND BEHIND THE COLD FRONT WITH GUSTS TO 60 MPH POSSIBLE. AS THE STORM MOVES EAST OF THE AREA WEDNESDAY...STRONG NORTHERLY WINDS ARE EXPECTED TO CONTINUE ACROSS THE AREA. MOISTURE ASSOCIATED WITH THIS STORM SYSTEM WILL BE LIMITED MAINLY TO AREAS NORTH AND EAST OF THE WARNING AREA SO RELATIVE HUMIDITY VALUES WILL BE BELOW 15 PERCENT MUCH OF THE TIME FROM LATE THIS MORNING THROUGH WEDNESDAY EVENING. AZZ102-272300- /O.CON.KVEF.FW.W.0021.091027T1700Z-091028T0300Z/ NORTHWEST DESERTS/NORTHWEST PLATEAU- 406 AM MST TUE OCT 27 2009 ...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 8 PM MST THIS EVENING FOR VERY STRONG AND GUSTY WINDS AND LOW RELATIVE HUMIDITIES... A RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM THIS MORNING TO 8 PM MST THIS EVENING FOR THE NORTHWEST DESERTS AND THE NORTHWEST PLATEAU. SOUTHWEST WINDS WILL INCREASE TO BETWEEN 20 AND 35 MPH BY LATE THIS MORNING MORNING WITH GUSTS POSSIBLY AS HIGH AS 60 MPH. WINDS WILL BECOME NORTHERLY BY LATE AFTERNOON OR EARLY THIS EVENING BEFORE DECREASING TO BETWEEN 10 AND MPH OVERNIGHT. RELATIVE HUMIDITY VALUES WILL BE BELOW 15 PERCENT MUCH OF THE DAY AND INTO THE EVENING AT AND BELOW AROUND 4000 FEET. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING OR ARE IMMINENT. A COMBINATION OF STRONG WINDS AND LOW RELATIVE HUMIDITY WILL CREATE EXTREME FIRE GROWTH POTENTIAL. && $$ AZZ101-CAZ227>229-NVZ465-466-272300- /O.CON.KVEF.FW.W.0021.091027T1700Z-091029T0300Z/ LAKE MEAD NRA/COLORADO RIVER-AZ SIDE-DEATH VALLEY NATIONAL PARK- MOJAVE DESERT-LOWER COLORADO RIVER VALLEY- CLARK AND SW LINCOLN COUNTY DESERTS/LAS VEGAS DISPATCH- LAKE MEAD NRA/COLORADO RIVER-NV SIDE- 406 AM PDT TUE OCT 27 2009 /406 AM MST TUE OCT 27 2009/ ...RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM PDT /10 AM MST/ THIS MORNING TO 8 PM PDT /8 PM MST/ WEDNESDAY FOR GUSTY WINDS AND LOW RELATIVE HUMIDITIES... A RED FLAG WARNING REMAINS IN EFFECT FROM 10 AM PDT /10 AM MST/ THIS MORNING TO 8 PM PDT /8 PM MST/ WEDNESDAY FOR THE LAKE MEAD NRA...THE COLORADO RIVER AND LOWER COLORADO RIVER VALLEY...DEATH VALLEY NATIONAL PARK...THE MOJAVE DESERT...AND CLARK AND SW LINCOLN COUNTY DESERTS. SOUTHWEST WINDS WILL INCREASE TO BETWEEN 20 AND 35 MPH BY LATE THIS MORNING WITH GUSTS POSSIBLY AS HIGH AS 60 MPH. STRONG NORTHERLY WINDS WILL THEN DEVELOP BEHIND A STRONG COLD FRONT AND THEN CONTINUE INTO WEDNESDAY EVENING. WINDS WILL LIKELY DECREASE FOR A TIME TONIGHT BUT WILL PICK BACK UP AGAIN WEDNESDAY MORNING WITH GUSTS TO 35 MPH OR GREATER EXPECTED. RELATIVE HUMIDITY VALUES WILL BE BELOW 15 PERCENT OVER MOST OF THE AREA BY LATE MORNING AND THEN CONTINUE INTO WEDNESDAY. PRECAUTIONARY/PREPAREDNESS ACTIONS... A RED FLAG WARNING MEANS THAT CRITICAL FIRE WEATHER CONDITIONS ARE EITHER OCCURRING OR ARE IMMINENT. A COMBINATION OF STRONG WINDS AND LOW RELATIVE HUMIDITY WILL CREATE EXTREME FIRE GROWTH POTENTIAL. && $$
000 WWUS85 KVEF 272141 RFWVEF URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE LAS VEGAS NV 241 PM PDT TUE OCT 27 2009 AZZ101-CAZ227>229-NVZ465-466-272245- /O.CAN.KVEF.FW.W.0021.000000T0000Z-091029T0300Z/ LAKE MEAD NRA/COLORADO RIVER-AZ SIDE-DEATH VALLEY NATIONAL PARK- MOJAVE DESERT-LOWER COLORADO RIVER VALLEY- CLARK AND SW LINCOLN COUNTY DESERTS/LAS VEGAS DISPATCH- LAKE MEAD NRA/COLORADO RIVER-NV SIDE- 241 PM PDT TUE OCT 27 2009 /241 PM MST TUE OCT 27 2009/ ...RED FLAG WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS CANCELLED THE RED FLAG WARNING FOR THE LAKE MEAD NRA...THE COLORADO RIVER AND LOWER COLORADO RIVER VALLEY...DEATH VALLEY NATIONAL PARK...THE MOJAVE DESERT...AND CLARK AND SW LINCOLN COUNTY DESERTS. EVEN THOUGH STRONG NORTH WINDS ARE EXPECTED TO CONTINUE THROUGH THE EVENING AND TOMORROW...COOLER TEMPERATURES HAVE RESULTED IN RELATIVE HUMIDITY VALUES ABOVE 15 PERCENT. $$ AZZ102-272245- /O.CAN.KVEF.FW.W.0021.000000T0000Z-091028T0300Z/ NORTHWEST DESERTS/NORTHWEST PLATEAU- 241 PM MST TUE OCT 27 2009 ...RED FLAG WARNING IS CANCELLED... THE NATIONAL WEATHER SERVICE IN LAS VEGAS HAS CANCELLED THE RED FLAG WARNING FOR THE NORTHWEST DESERTS AND THE NORTHWEST PLATEAU. EVEN THOUGH STRONG NORTH WINDS ARE EXPECTED TO CONTINUE THROUGH THE EVENING AND TOMORROW...COOLER TEMPERATURES HAVE RESULTED IN RELATIVE HUMIDITY VALUES ABOVE 15 PERCENT. $$
The office that day
Everything else NWS Las Vegas, NV issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 26, 3:51 AM PDT | Fire Weather Watch | VEF | Clark, Lincoln | 11 hr |
| Oct 26, 3:02 PM PDT | High Wind Warning | VEF | Clark, Esmeralda, Lincoln, Nye | 24 hr |
Nearby
Red Flag Warnings in Nevada, 2009Red Flag Warnings in California, 2009Red Flag Warnings in Arizona, 2009Every red flag warning in 2009
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.