Alert archive / Arizona / Red Flag Warnings in 2009
Red Flag Warning 13, NWS Phoenix, AZ
NWS Phoenix, AZ issued this red flag warning at Oct 27, 2009, 1:51 PM MST for 4 counties in Arizona; Imperial County, Riverside County, California. It took effect at Oct 28, 2009, 11:00 AM MST. It was in force for 6 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 27, 2009, 1:51 PM MST (20:51 UTC)
- In effect from
- Oct 28, 2009, 11:00 AM MST
- Expired
- Oct 28, 2009, 5:00 PM MST
- In force
- 6 hr
- Issued by
- NWS Phoenix, AZ
Counties La Paz County, AZ, Maricopa County, AZ, Pinal County, AZ, Yuma County, AZ, Imperial County, CA, Riverside County, CA
The radar
The Yuma radar (KYUX), 113 km from the middle of the area, began a volume at 20:54 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, 8.9 hours before the alert went out and 97 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
- 4961 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 105 m²/s²
- 0-3 km storm-relative helicity
- 138 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 KPSR 272051 RFWPSR URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE PHOENIX AZ 151 PM MST TUE OCT 27 2009 AZZ131-132-CAZ231-232-280900- /O.UPG.KPSR.FW.A.0009.091028T1800Z-091029T0200Z/ /O.NEW.KPSR.FW.W.0013.091028T1500Z-091029T0000Z/ /O.CON.KPSR.FW.W.0012.000000T0000Z-091028T0300Z/ ARIZONA FIRE WEATHER ZONE 131 YUMA/MARTINEZ LAKE AND VICINITY/LOWER COLORADO RIVER VALLEY AZ- ARIZONA FIRE WEATHER ZONE 132 SOUTH-CENTRAL AND SOUTHWEST DESERTS- CALIFORNIA FIRE WEATHER ZONE 231 LOWER COLORADO RIVER VALLEY CA- CALIFORNIA FIRE WEATHER ZONE 232 IMPERIAL COUNTY AND EASTERN RIVERSIDE COUNTY- 151 PM MST TUE OCT 27 2009 /151 PM PDT TUE OCT 27 2009/ ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MST /8 PM PDT/ THIS EVENING FOR THE DESERTS OF SOUTHEAST CALIFORNIA...THE LOWER COLORADO RIVER VALLEY FOR STRONG WINDS...LOW HUMIDITY...AND HIGH FIRE DANGER... ...RED FLAG WARNING NOW IN EFFECT FROM 8 AM MST /8 AM PDT/ TO 5 PM MST /5 PM PDT/ WEDNESDAY FOR THE DESERTS OF SOUTH-CENTRAL ARIZONA FOR STRONG WINDS...LOW HUMIDITY...AND HIGH FIRE DANGER... WINDS CONTINUE TO INCREASE ACROSS THE AREA AS A STRONG COLD FRONT SWEEPS FROM NORTH TO SOUTH. WINDS HAVE ALREADY REACHED RED FLAG CRITERIA IN PARTS OF SOUTHEAST CALIFORNIA...AND WINDS WILL SLOWLY TAPER OFF TONIGHT. HUMIDITY IS EXPECTED TO INCREASE TO ABOVE 15 PERCENT THIS EVENING. THE STRONG LOW PRESSURE SYSTEM AND ASSOCIATED COLD FRONT WILL MOVE ACROSS THE SOUTHWESTERN STATES THIS EVENING. WINDY CONDITIONS WILL DEVELOP TONIGHT AND LINGER INTO WEDNESDAY FOR THE ARIZONA DESERTS. LOW HUMIDITY WILL ALSO OCCUR WITH THESE STRONG WINDS...THUS CRITICAL FIRE WEATHER CONDITIONS ARE NOW EXPECTED FOR ZONE 132 WEDNESDAY. THE WINDY AND DRY CONDITIONS WILL SLOWLY DIMINISH LATE WEDNESDAY. WINDS WILL DROP TO BELOW CRITICAL THRESHOLDS BY WEDNESDAY EVENING. PRECAUTIONARY/PREPAREDNESS ACTIONS... PLEASE ADVISE THE APPROPRIATE OFFICIALS AND FIRE CREWS IN THE FIELD OF THIS RED FLAG WARNING. && $$ AZZ133-CAZ230-280300- /O.CON.KPSR.FW.W.0012.000000T0000Z-091028T0300Z/ ARIZONA FIRE WEATHER ZONE 133 SOUTHERN GILA COUNTY/TONTO NATIONAL FOREST FOOTHILLS- CALIFORNIA FIRE WEATHER ZONE 230 JOSHUA TREE NATIONAL PARK- 151 PM MST TUE OCT 27 2009 /151 PM PDT TUE OCT 27 2009/ ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 8 PM MST /8 PM PDT/ THIS EVENING...FOR SOUTHEAST CALIFORNIA AND SOUTHWEST AND SOUTH-CENTRAL ARIZONA...FOR STRONG WINDS...LOW HUMIDITY AND A HIGH FIRE DANGER... AN UNSEASONABLY STRONG LOW PRESSURE SYSTEM AND ASSOCIATED COLD FRONT IS MOVING ACROSS THE SOUTHWESTERN STATES. WINDS HAVE BEEN CLOCKED AT UP TO 42 MPH AT JOSHUA TREE NP WITH RH BELOW 15 PERCENT. WINDS HAVE BEEN STRONG IN THE MOUNTAINS OF SOUTHERN GILA COUNTY AS GUSTS TO 48 MPH WERE RECORDED IN THE PINAL MOUNTAINS NEAR GLOBE. TEMPERATURES WILL FALL RAPIDLY TONIGHT...ALLOWING RH VALUES TO RECOVER SOMEWHAT. PRECAUTIONARY/PREPAREDNESS ACTIONS... PLEASE ADVISE THE APPROPRIATE OFFICIALS AND FIRE CREWS IN THE FIELD OF THIS RED FLAG WARNING. && $$ SIPPLE
2 follow-up statements
000 WWUS85 KPSR 280248 RFWPSR URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE PHOENIX AZ 748 PM MST TUE OCT 27 2009 AZZ131-132-CAZ231-232-281500- /O.EXP.KPSR.FW.W.0012.000000T0000Z-091028T0300Z/ /O.CON.KPSR.FW.W.0013.091028T1500Z-091029T0000Z/ ARIZONA FIRE WEATHER ZONE 131 YUMA/MARTINEZ LAKE AND VICINITY/LOWER COLORADO RIVER VALLEY AZ- ARIZONA FIRE WEATHER ZONE 132 SOUTH-CENTRAL AND SOUTHWEST DESERTS- CALIFORNIA FIRE WEATHER ZONE 231 LOWER COLORADO RIVER VALLEY CA- CALIFORNIA FIRE WEATHER ZONE 232 IMPERIAL COUNTY AND EASTERN RIVERSIDE COUNTY- 748 PM MST TUE OCT 27 2009 /748 PM PDT TUE OCT 27 2009/ ...RED FLAG WARNING REMAINS IN EFFECT FROM 8 AM MST /8 AM PDT/ TO 5 PM MST /5 PM PDT/ WEDNESDAY... ...RED FLAG WARNING WILL EXPIRE AT 8 PM MST /8 PM PDT/ THIS EVENING... THE RED FLAG WARNING WILL EXPIRE AT 8 PM MST /8 PM PDT/ THIS EVENING. A RED FLAG WARNING REMAINS IN EFFECT FROM 8 AM MST /8 AM PDT/ TO 5 PM MST /5 PM PDT/ WEDNESDAY. A STRONG COLD FRONT CONTINUES TO PUSH SOUTHEASTWARD ACROSS CENTRAL ARIZONA THIS EVENING. GUSTY NORTHWEST WINDS TO AROUND 30 MPH ARE BEING OBSERVED BEHIND THE FRONT. AS THE TEMPERATURE COOLS...RELATIVE HUMIDITIES WILL BE INCREASING TO ABOVE CRITICAL FIRE WEATHER THRESHOLDS. THEREFORE...THE RED FLAG WARNING WILL BE ALLOWED TO EXPIRE AT 8 PM MST/ 8 PM PDT/ THIS EVENING. A RED FLAG WARNING REMAINS IN EFFECT FROM 8 AM MST /8 AM PDT/ TO 5 PM MST /5 PM PDT/ WEDNESDAY. WINDY CONDITIONS WILL CONTINUE INTO WEDNESDAY AS A LOW PRESSURE SYSTEM CONTINUES TO MOVE ACROSS THE SOUTHWEST. A DRY AIRMASS WILL REMAIN IN PLACE...WITH HUMIDITIES EXCEEDING CRITICAL FIRE WEATHER THRESHOLDS DURING THE LATE MORNING INTO THE LATE AFTERNOON. THE WINDY AND DRY CONDITIONS WILL SLOWLY DIMINISH LATE WEDNESDAY. WINDS WILL DROP TO BELOW CRITICAL THRESHOLDS BY WEDNESDAY EVENING. PRECAUTIONARY/PREPAREDNESS ACTIONS... PLEASE ADVISE THE APPROPRIATE OFFICIALS AND FIRE CREWS IN THE FIELD OF THIS RED FLAG WARNING. && $$ AZZ133-CAZ230-280400- /O.EXP.KPSR.FW.W.0012.000000T0000Z-091028T0300Z/ ARIZONA FIRE WEATHER ZONE 133 SOUTHERN GILA COUNTY/TONTO NATIONAL FOREST FOOTHILLS- CALIFORNIA FIRE WEATHER ZONE 230 JOSHUA TREE NATIONAL PARK- 748 PM MST TUE OCT 27 2009 /748 PM PDT TUE OCT 27 2009/ ...RED FLAG WARNING WILL EXPIRE AT 8 PM MST /8 PM PDT/ THIS EVENING... THE RED FLAG WARNING WILL EXPIRE AT 8 PM MST /8 PM PDT/ THIS EVENING. A STRONG COLD FRONT CONTINUES TO PUSH SOUTHEASTWARD ACROSS CENTRAL ARIZONA THIS EVENING. GUSTY NORTHWEST WINDS TO AROUND 30 MPH ARE BEING OBSERVED BEHIND THE FRONT. AS THE TEMPERATURE COOLS...RELATIVE HUMIDITIES WILL BE INCREASING TO ABOVE CRITICAL FIRE WEATHER THRESHOLDS. THEREFORE...THE RED FLAG WARNING WILL BE ALLOWED TO EXPIRE AT 8 PM MST/ 8 PM PDT/ THIS EVENING. $$
000 WWUS85 KPSR 281153 RFWPSR URGENT - FIRE WEATHER MESSAGE NATIONAL WEATHER SERVICE PHOENIX AZ 453 AM MST WED OCT 28 2009 AZZ131-132-CAZ231-232-290000- /O.EXT.KPSR.FW.W.0013.091028T1800Z-091029T0000Z/ ARIZONA FIRE WEATHER ZONE 131 YUMA/MARTINEZ LAKE AND VICINITY/LOWER COLORADO RIVER VALLEY AZ- ARIZONA FIRE WEATHER ZONE 132 SOUTH-CENTRAL AND SOUTHWEST DESERTS- CALIFORNIA FIRE WEATHER ZONE 231 LOWER COLORADO RIVER VALLEY CA- CALIFORNIA FIRE WEATHER ZONE 232 IMPERIAL COUNTY AND EASTERN RIVERSIDE COUNTY- 453 AM MST WED OCT 28 2009 /453 AM PDT WED OCT 28 2009/ ...RED FLAG WARNING NOW IN EFFECT FROM 11 AM MST /11 AM PDT/ THIS MORNING TO 5 PM MST /5 PM PDT/ THIS AFTERNOON... THE RED FLAG WARNING IS NOW IN EFFECT FROM 11 AM MST /11 AM PDT/ THIS MORNING TO 5 PM MST /5 PM PDT/ THIS AFTERNOON. DANGEROUS FIRE WEATHER CONDITIONS WILL DEVELOP ONCE AGAIN LATE THIS MORNING THROUGH THE AFTERNOON HOURS. WINDY CONDITIONS...SUSTAINED 20-FOOT WINDS OF 20 TO 30 MPH WITH GUSTS TO 40 MPH...WILL CONTINUE TODAY AS A LOW PRESSURE SYSTEM MOVES ACROSS THE SOUTHWEST. THE STRONGEST WINDS WILL BE ACROSS SOUTHEAST CALIFORNIA AND SOUTHWEST ARIZONA...INCLUDING THE WESTERN HALF OF FIRE WEATHER ZONE 132. A DRY AIRMASS WILL REMAIN IN PLACE...WITH RELATIVE HUMIDITY VALUES FALLING BELOW 15 PERCENT THIS AFTERNOON. THE WINDY AND DRY CONDITIONS WILL SLOWLY DIMINISH LATER TODAY AS WINDS DROP BELOW CRITICAL THRESHOLDS AND RELATIVE HUMIDITY VALUES INCREASE DUE TO MUCH COOLER TEMPERATURES MOVING IN FROM THE NORTH. PRECAUTIONARY/PREPAREDNESS ACTIONS... PLEASE ADVISE THE APPROPRIATE OFFICIALS AND FIRE CREWS IN THE FIELD OF THIS RED FLAG WARNING. && $$ INIGUEZ
The office that day
Everything else NWS Phoenix, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 27, 2:36 AM MST | Fire Weather Watch | PSR | La Paz, Maricopa, Pinal, Yuma | 11 hr |
| Oct 27, 3:36 PM MST | Blowing Dust Advisory | PSR | 5 hr |
Nearby
Red Flag Warnings in Arizona, 2009Red Flag Warnings in California, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.