Alert archive / Arizona / Red Flag Warnings in 2018
Red Flag Warning 2, NWS Phoenix, AZ
NWS Phoenix, AZ issued this red flag warning at Apr 12, 2018, 4:46 AM MST for 4 counties in Arizona. It took effect at Apr 13, 2018, 11:00 AM MST. 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
- Apr 12, 2018, 4:46 AM MST (11:46 UTC)
- In effect from
- Apr 13, 2018, 11:00 AM MST
- Expired
- Apr 13, 2018, 7:00 PM MST
- In force
- 8 hr
- Issued by
- NWS Phoenix, AZ
Counties La Paz County, AZ, Maricopa County, AZ, Pinal County, AZ, Yuma County, AZ
The radar
The Phoenix radar (KIWA), 118 km from the middle of the area, began a volume at 11:49 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
Tuscon, AZ (KDMA), launched 00:00Z, 11.8 hours before the alert went out and 221 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
- 5572 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 25 m²/s²
- 0-3 km storm-relative helicity
- 24 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
342 WWUS85 KPSR 121146 RFWPSR URGENT - FIRE WEATHER MESSAGE National Weather Service Phoenix AZ 446 AM MST Thu Apr 12 2018 AZZ132-122300- /O.NEW.KPSR.FW.W.0002.180413T1800Z-180414T0200Z/ /O.CON.KPSR.FW.W.0001.180412T1900Z-180413T0400Z/ Central Deserts- 446 AM MST Thu Apr 12 2018 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 9 PM MST THIS EVENING FOR STRONG WINDS, LOW RELATIVE HUMIDITY AND VERY HIGH TO EXTREME FIRE DANGER FOR SOUTH-CENTRAL ARIZONA... ...RED FLAG WARNING IN EFFECT FROM 11 AM TO 7 PM MST FRIDAY FOR STRONG WINDS, LOW RELATIVE HUMIDITY AND VERY HIGH TO EXTREME FIRE DANGER FOR SOUTH-CENTRAL ARIZONA... The National Weather Service in Phoenix has issued a Red Flag Warning for strong winds, low relative humidity and very high to extreme fire danger, which is in effect from 11 AM to 7 PM MST Friday. * AFFECTED AREA...Central Deserts. * WINDS...Today...Northwest 20 to 30 mph with gusts up to 45 mph. Tomorrow...north 15 to 25 mph gusting to 35 mph. * TIMING...From noon today through 9 PM this evening. A second warning is in effect from 11 AM through 7 PM tomorrow. * RELATIVE HUMIDITY...Below 10 percent. * IMPACTS...Fuels are very dry and fire danger is very high to extreme. 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. && $$ AZZ133-122300- /O.CON.KPSR.FW.W.0001.180412T1900Z-180413T0400Z/ Southern Gila County/Tonto National Forest Foothills- 446 AM MST Thu Apr 12 2018 ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON TODAY TO 9 PM MST THIS EVENING FOR STRONG WINDS, LOW RELATIVE HUMIDITY AND VERY HIGH TO EXTREME FIRE DANGER FOR SOUTHERN GILA COUNTY... * AFFECTED AREA...Southern Gila County/Tonto National Forest Foothills. * WINDS...West 20 to 30 mph with gusts up to 45 mph. * TIMING...From noon through 9 PM today. * RELATIVE HUMIDITY...Several hours below 10 percent. * IMPACTS...Fuels are very dry and fire danger is very high to extreme. These conditions combined with low relative humidity and strong winds will lead to widespread hazardous fire weather conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Please advise the appropriate officials and fire crews in the field of this red flag warning. && $$ AZZ131-CAZ230>232-122300- /O.CON.KPSR.FW.W.0001.180412T1900Z-180413T0400Z/ Yuma/Martinez Lake and Vicinity/Lower Colorado River Valley AZ- Joshua Tree National Park-Lower Colorado River Valley CA- Imperial County And Eastern Riverside County- 446 AM MST Thu Apr 12 2018 /446 AM PDT Thu Apr 12 2018/ ...RED FLAG WARNING REMAINS IN EFFECT FROM NOON MST /NOON PDT/ TODAY TO 9 PM MST /9 PM PDT/ THIS EVENING FOR STRONG WINDS, LOW RELATIVE HUMIDITY AND VERY HIGH TO EXTREME FIRE DANGER FOR SOUTHEAST CALIFORNIA AND SOUTHWEST ARIZONA... * AFFECTED AREA...Yuma/Martinez Lake and Vicinity/Lower Colorado River Valley AZ, Joshua Tree National Park, Lower Colorado River Valley CA and Imperial County And Eastern Riverside County. * WINDS...Northwest 15 to 25 mph with gusts up to 45 mph. * TIMING...From noon through 9 PM today. * RELATIVE HUMIDITY...As low as 9 percent. * IMPACTS...Fuels are very dry and fire danger is very high to extreme. 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. && $$ National Weather Service Phoenix is on the internet at weather.gov/phoenix
5 follow-up statements
057 WWUS85 KPSR 121813 RFWPSR URGENT - FIRE WEATHER MESSAGE National Weather Service Phoenix AZ 1113 AM MST Thu Apr 12 2018 AZZ132-131200- /O.CON.KPSR.FW.W.0001.180412T1900Z-180413T0400Z/ /O.CON.KPSR.FW.W.0002.180413T1800Z-180414T0200Z/ Central Deserts- 1113 AM MST Thu Apr 12 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MST THIS EVENING FOR STRONG WINDS, LOW RELATIVE HUMIDITY AND VERY HIGH TO EXTREME FIRE DANGER FOR SOUTH-CENTRAL ARIZONA... ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM TO 7 PM MST FRIDAY FOR STRONG WINDS, LOW RELATIVE HUMIDITY AND VERY HIGH TO EXTREME FIRE DANGER FOR SOUTH-CENTRAL ARIZONA... * AFFECTED AREA...Central Deserts. * WINDS...Thursday: Northwest 20 to 30 mph with gusts up to 45 mph. Friday: North 15 to 25 mph gusting to 35 mph. * TIMING...From noon today through 9 PM this evening. A second warning is in effect from 11 AM through 7 PM tomorrow. * RELATIVE HUMIDITY...Below 10 percent. * IMPACTS...Fuels are very dry and fire danger is very high to extreme. These conditions combined with low relative humidity and strong winds will lead to widespread hazardous fire weather conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Please advise the appropriate officials and fire crews in the field of this red flag warning. && $$ AZZ133-130400- /O.CON.KPSR.FW.W.0001.180412T1900Z-180413T0400Z/ Southern Gila County/Tonto National Forest Foothills- 1113 AM MST Thu Apr 12 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MST THIS EVENING FOR STRONG WINDS, LOW RELATIVE HUMIDITY AND VERY HIGH TO EXTREME FIRE DANGER FOR SOUTHERN GILA COUNTY... * AFFECTED AREA...Southern Gila County/Tonto National Forest Foothills. * WINDS...West 20 to 30 mph with gusts up to 45 mph. * TIMING...From noon through 9 PM today. * RELATIVE HUMIDITY...Several hours below 10 percent. * IMPACTS...Fuels are very dry and fire danger is very high to extreme. 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. && $$ AZZ131-CAZ230>232-130400- /O.CON.KPSR.FW.W.0001.180412T1900Z-180413T0400Z/ Yuma/Martinez Lake and Vicinity/Lower Colorado River Valley AZ- Joshua Tree National Park-Lower Colorado River Valley CA- Imperial County And Eastern Riverside County- 1113 AM MST Thu Apr 12 2018 /1113 AM PDT Thu Apr 12 2018/ ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 9 PM MST /9 PM PDT/ THIS EVENING FOR STRONG WINDS, LOW RELATIVE HUMIDITY AND VERY HIGH TO EXTREME FIRE DANGER FOR SOUTHEAST CALIFORNIA AND SOUTHWEST ARIZONA... * AFFECTED AREA...Yuma/Martinez Lake and Vicinity/Lower Colorado River Valley AZ, Joshua Tree National Park, Lower Colorado River Valley CA and Imperial County And Eastern Riverside County. * WINDS...Northwest 15 to 25 mph with gusts up to 45 mph. * TIMING...From noon through 9 PM today. * RELATIVE HUMIDITY...As low as 9 percent. * IMPACTS...Fuels are very dry and fire danger is very high to extreme. These conditions combined with low relative humidity and strong winds will lead to widespread hazardous fire weather conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Please advise the appropriate officials and fire crews in the field of this red flag warning. && $$ National Weather Service Phoenix is on the internet at weather.gov/phoenix
795 WWUS85 KPSR 130358 RFWPSR URGENT - FIRE WEATHER MESSAGE National Weather Service Phoenix AZ 858 PM MST Thu Apr 12 2018 AZZ132-131400- /O.EXP.KPSR.FW.W.0001.000000T0000Z-180413T0400Z/ /O.CON.KPSR.FW.W.0002.180413T1800Z-180414T0200Z/ Central Deserts- 858 PM MST Thu Apr 12 2018 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM TO 7 PM MST FRIDAY FOR STRONG WINDS, LOW RELATIVE HUMIDITY AND VERY HIGH TO EXTREME FIRE DANGER FOR SOUTH-CENTRAL ARIZONA... ...RED FLAG WARNING WILL EXPIRE AT 9 PM MST THIS EVENING FOR STRONG WINDS, LOW RELATIVE HUMIDITY AND VERY HIGH TO EXTREME FIRE DANGER FOR SOUTH-CENTRAL ARIZONA... * AFFECTED AREA...Central Deserts. * WINDS...Northwest 15 to 25 mph with gusts up to 35 mph. * TIMING...From noon today through 9 PM this evening. A second warning is in effect from 11 AM through 7 PM tomorrow. * RELATIVE HUMIDITY...As low as 6 percent. * IMPACTS...Fuels are very dry and fire danger is very high to extreme. 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. && $$ AZZ133-130500- /O.EXP.KPSR.FW.W.0001.000000T0000Z-180413T0400Z/ Southern Gila County/Tonto National Forest Foothills- 858 PM MST Thu Apr 12 2018 ...RED FLAG WARNING WILL EXPIRE AT 9 PM MST THIS EVENING FOR STRONG WINDS, LOW RELATIVE HUMIDITY AND VERY HIGH TO EXTREME FIRE DANGER FOR SOUTHERN GILA COUNTY... Weakening wind speeds and cooling temperatures are no longer supportive of critical fire weather conditions. However, elevated fire weather conditions may continue into early Friday morning given the dry fuels and low relative humidity values. $$ AZZ131-CAZ230>232-130500- /O.EXP.KPSR.FW.W.0001.000000T0000Z-180413T0400Z/ Yuma/Martinez Lake and Vicinity/Lower Colorado River Valley AZ- Joshua Tree National Park-Lower Colorado River Valley CA- Imperial County And Eastern Riverside County- 858 PM MST Thu Apr 12 2018 /858 PM PDT Thu Apr 12 2018/ ...RED FLAG WARNING WILL EXPIRE AT 9 PM MST /9 PM PDT/ THIS EVENING FOR STRONG WINDS, LOW RELATIVE HUMIDITY AND VERY HIGH TO EXTREME FIRE DANGER FOR SOUTHEAST CALIFORNIA AND SOUTHWEST ARIZONA... Weakening wind speeds and cooling temperatures are no longer supportive of critical fire weather conditions. However, elevated fire weather conditions may continue into early Friday morning given the dry fuels and low relative humidity values. $$ National Weather Service Phoenix is on the internet at weather.gov/phoenix
200 WWUS85 KPSR 131152 RFWPSR URGENT - FIRE WEATHER MESSAGE National Weather Service Phoenix AZ 452 AM MST Fri Apr 13 2018 AZZ132-140000- /O.CON.KPSR.FW.W.0002.180413T1800Z-180414T0200Z/ Central Deserts- 452 AM MST Fri Apr 13 2018 ...RED FLAG WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 7 PM MST THIS EVENING FOR STRONG WINDS, LOW RELATIVE HUMIDITY AND VERY HIGH TO EXTREME FIRE DANGER FOR SOUTH CENTRAL ARIZONA... * AFFECTED AREA...Central Deserts, primarily across La Paz and northwest Maricopa Counties. * WINDS...Northwest 15 to 25 mph with gusts up to 40 mph. * TIMING...From 11 AM through 7 PM today. * RELATIVE HUMIDITY...As low as 5 percent. * IMPACTS...Fuels are very dry and fire danger is very high to extreme. These conditions combined with low relative humidity and strong winds will lead to widespread hazardous fire weather conditions. PRECAUTIONARY/PREPAREDNESS ACTIONS... Please advise the appropriate officials and fire crews in the field of this red flag warning. && $$ National Weather Service Phoenix is on the internet at weather.gov/phoenix
906 WWUS85 KPSR 132035 RFWPSR URGENT - FIRE WEATHER MESSAGE National Weather Service Phoenix AZ 135 PM MST Fri Apr 13 2018 AZZ132-140200- /O.CON.KPSR.FW.W.0002.000000T0000Z-180414T0200Z/ Central Deserts- 135 PM MST Fri Apr 13 2018 ...RED FLAG WARNING REMAINS IN EFFECT UNTIL 7 PM MST THIS EVENING FOR STRONG WINDS, LOW RELATIVE HUMIDITY AND VERY HIGH TO EXTREME FIRE DANGER FOR SOUTH-CENTRAL ARIZONA... * AFFECTED AREA...Central Deserts. * WINDS...Northwest 15 to 25 mph with gusts up to 35 mph. * TIMING...From 11 AM through 7 PM today. * RELATIVE HUMIDITY...As low as 6 percent. * IMPACTS...Fuels are very dry and fire danger is very high to extreme. 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. && $$ National Weather Service Phoenix is on the internet at weather.gov/phoenix
275 WWUS85 KPSR 140158 RFWPSR URGENT - FIRE WEATHER MESSAGE National Weather Service Phoenix AZ 658 PM MST Fri Apr 13 2018 AZZ132-140300- /O.EXP.KPSR.FW.W.0002.000000T0000Z-180414T0200Z/ Central Deserts- 658 PM MST Fri Apr 13 2018 ...RED FLAG WARNING WILL EXPIRE AT 7 PM MST THIS EVENING FOR STRONG WINDS, LOW RELATIVE HUMIDITY AND VERY HIGH TO EXTREME FIRE DANGER FOR SOUTH-CENTRAL ARIZONA... Winds continue to subside this evening, though breezy conditions will persist overnight in some areas. Meanwhile, a modest recovery in RHs is anticipated, with values generally increasing above 15 percent overnight. $$ 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 |
|---|---|---|---|---|
| Apr 12, 9:41 AM MST | Blowing Dust Advisory | PSR | La Paz, Maricopa, Pinal, Yuma | 12 hr |
| Apr 12, 1:34 PM MST | Dust Storm Warning | PSR | Maricopa, Pinal | 5 hr |
Nearby
Red Flag Warnings in Arizona, 2018Every red flag warning in 2018
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.