Alert archive / Arizona / Red Flag Warnings in 2011
Red Flag Warning 13, NWS Phoenix, AZ
NWS Phoenix, AZ issued this red flag warning at Oct 25, 2011, 2:41 PM MST for La Paz County, Yuma County, Arizona; Imperial County, Riverside County, California. It took effect at Oct 26, 2011, 2:00 PM MST. It was in force for 7 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
- Oct 25, 2011, 2:41 PM MST (21:41 UTC)
- In effect from
- Oct 26, 2011, 2:00 PM MST
- Expired
- Oct 26, 2011, 9:00 PM MST
- In force
- 7 hr
- Issued by
- NWS Phoenix, AZ
Counties La Paz County, AZ, Yuma County, AZ, Imperial County, CA, Riverside County, CA
The radar
The Yuma radar (KYUX), 93 km from the middle of the area, began a volume at 21:45 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
Yuma Intl Airpor, AZ (KYUM), launched 12:00Z, 9.7 hours before the alert went out and 77 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
- 47 J/kg
- Mixed-layer CIN
- -257 J/kg
- Mixed-layer LCL
- 2220 m above ground
- 0-6 km bulk shear
- 43 kt
- 0-1 km storm-relative helicity
- -15 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.
144 WWUS85 KPSR 252141 RFWPSR URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE PHOENIX AZ 241 PM MST TUE OCT 25 2011 AZZ131-CAZ231-260545- /O.NEW.KPSR.FW.W.0013.111026T2100Z-111027T0400Z/ ARIZONA FIRE WEATHER ZONE 131 YUMA/MARTINEZ LAKE AND VICINITY/LOWER COLORADO RIVER VALLEY AZ- CALIFORNIA FIRE WEATHER ZONE 231 LOWER COLORADO RIVER VALLEY CA- 241 PM MST TUE OCT 25 2011 /241 PM PDT TUE OCT 25 2011/ ...RED FLAG WARNING IN EFFECT FROM 2 PM MST /2 PM PDT/ TO 9 PM MST /9 PM PDT/ WEDNESDAY FOR STRONG WINDS...LOW RELATIVE HUMIDITY AND HIGH FIRE DANGER FOR THE LOWER COLORADO RIVER VALLEY... THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A RED FLAG WARNING FOR STRONG WINDS...LOW RELATIVE HUMIDITY AND HIGH FIRE DANGER...WHICH IS IN EFFECT FROM 2 PM MST /2 PM PDT/ TO 9 PM MST /9 PM PDT/ WEDNESDAY. * AFFECTED AREA...IN ARIZONA...YUMA/MARTINEZ LAKE AND VICINITY/LOWER COLORADO RIVER VALLEY AZ. IN CALIFORNIA...LOWER COLORADO RIVER VALLEY CA. THE STRETCH BETWEEN PARKER AND BLYTHE IS MORE LIKELY TO REACH RED FLAG CRITERIA THAN THE SOUTHERNMOST STRETCH. * WINDS...NORTH 20 TO 25 MPH WITH GUSTS UP TO 40 MPH. * TIMING...STRONG WINDS WILL DEVELOP IN THE AFTERNOON WEDNESDAY WITH THE COMBINATION OF LOW HUMIDITY AND STRONG WINDS BEGINNING MID AFTERNOON. * RELATIVE HUMIDITY...AS LOW AS 10 PERCENT. * IMPACTS...FUELS ARE VERY DRY AND FIRE DANGER IS HIGH. THESE CONDITIONS...COMBINED WITH LOW RELATIVE HUMIDITY AND STRONG WINDS WILL LEAD TO WIDESPREAD HAZARDOUS FIRE WEATHER CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... PLEASE ADVISE THE APPROPRIATE OFFICIALS AND FIRE CREWS IN THE FIELD OF THIS RED FLAG WARNING. && $$ NATIONAL WEATHER SERVICE PHOENIX IS ON THE INTERNET AT WEATHER.GOV/PHOENIX AJ
1 follow-up statement
206 WWUS85 KPSR 261148 RFWPSR URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE PHOENIX AZ 448 AM MST WED OCT 26 2011 AZZ131-CAZ231-270400- /O.CON.KPSR.FW.W.0013.111026T2100Z-111027T0400Z/ ARIZONA FIRE WEATHER ZONE 131 YUMA/MARTINEZ LAKE AND VICINITY/LOWER COLORADO RIVER VALLEY AZ- CALIFORNIA FIRE WEATHER ZONE 231 LOWER COLORADO RIVER VALLEY CA- 448 AM MST WED OCT 26 2011 /448 AM PDT WED OCT 26 2011/ ...RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM MST /2 PM PDT/ THIS AFTERNOON TO 9 PM MST /9 PM PDT/ THIS EVENING FOR STRONG WINDS...LOW RELATIVE HUMIDITY AND HIGH FIRE DANGER FOR THE LOWER COLORADO RIVER VALLEY... A RED FLAG WARNING REMAINS IN EFFECT FROM 2 PM MST /2 PM PDT/ THIS AFTERNOON TO 9 PM MST /9 PM PDT/ THIS EVENING. * AFFECTED AREA...IN ARIZONA...YUMA/MARTINEZ LAKE AND VICINITY/LOWER COLORADO RIVER VALLEY AZ. IN CALIFORNIA...LOWER COLORADO RIVER VALLEY CA. THE STRETCH BETWEEN PARKER AND BLYTHE IS MORE LIKELY TO REACH RED FLAG CRITERIA THAN THE SOUTHERNMOST STRETCH. * WINDS...NORTH 20 TO 25 MPH WITH GUSTS UP TO 40 MPH. * TIMING...STRONG WINDS WILL DEVELOP THIS AFTERNOON AND LINGER INTO THIS EVENING. * RELATIVE HUMIDITY...AS LOW AS 10 PERCENT. * IMPACTS...FUELS ARE VERY DRY AND FIRE DANGER IS HIGH. THESE CONDITIONS...COMBINED WITH LOW RELATIVE HUMIDITY AND STRONG WINDS WILL LEAD TO WIDESPREAD HAZARDOUS FIRE WEATHER CONDITIONS. PRECAUTIONARY/PREPAREDNESS ACTIONS... PLEASE ADVISE THE APPROPRIATE OFFICIALS AND FIRE CREWS IN THE FIELD OF THIS RED FLAG WARNING. && $$ NATIONAL WEATHER SERVICE PHOENIX IS ON THE INTERNET AT WEATHER.GOV/PHOENIX
The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 25, 2:22 PM MST | Wind Advisory | PSR | 6 hr |
Nearby
Red Flag Warnings in Arizona, 2011Red Flag Warnings in California, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.