Alert archive / Arizona / Flash Flood Warnings in 2021

Flash Flood Warning 19, NWS Phoenix, AZ

July 4, 2021Gila County, Arizona

NWS Phoenix, AZ issued this flash flood warning at Jul 4, 2021, 3:09 PM MST for Gila County, Arizona. It was in force for 4 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 4, 2021, 3:09 PM MST (22:09 UTC)
Expired: Jul 4, 2021, 7:15 PM MST
In force: 4 hr
Issued by: NWS Phoenix, AZ
Area: Storm-based polygon
Damage threat: Considerable
Flood severity: None

County Gila County, AZ

The radar

The Phoenix radar (KIWA), 102 km from the middle of the area, began a volume at 22:10 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 (KTUS), launched 12:00Z, 10.2 hours before the alert went out and 130 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: 550 J/kg
Mixed-layer CIN: -109 J/kg
Mixed-layer LCL: 910 m above ground
0-6 km bulk shear: 12 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 44 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

077 
WGUS55 KPSR 042209
FFWPSR
AZC007-050215-
/O.NEW.KPSR.FF.W.0019.210704T2209Z-210705T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Phoenix AZ
309 PM MST Sun Jul 4 2021

The National Weather Service in Phoenix has issued a

* Flash Flood Warning for...
  The Mescal Fire burn scar in...
  Gila County in east central Arizona...

* Until 715 PM MST.

* At 309 PM MST, Doppler radar indicated thunderstorms producing 
  heavy rain over the Mescal Fire Burn Scar. Between 1 and 3 inches 
  of rain have fallen. Additional rainfall amounts up to 1 inch are 
  possible in the warned area. Flash flooding is ongoing or expected 
  to begin shortly.

  HAZARD...Life threatening flash flooding. Thunderstorms
           producing flash flooding in and around the Mescal Fire
           Burn Scar.

  SOURCE...Radar.

  IMPACT...Life threatening flash flooding of areas in and around
           the Mescal Fire Burn Scar.

* Some locations that will experience flash flooding include...
  Cutter.

This includes the following highways...
	AZ Route 70 between mile markers 259 and 268.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Move away from recently burned areas. Life-threatening flooding of 
creeks, roads and normally dry arroyos is likely. The heavy rains 
will likely trigger rockslides, mudslides and debris flows in steep 
terrain, especially in and around these areas.

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 3327 11052 3322 11066 3328 11070 3338 11066
      3340 11056 3335 11048 3330 11048

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

Rogers

3 follow-up statements

739 
WGUS75 KPSR 042314
FFSPSR

Flash Flood Statement
National Weather Service Phoenix AZ
414 PM MST Sun Jul 4 2021

AZC007-050215-
/O.CON.KPSR.FF.W.0019.000000T0000Z-210705T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Gila AZ-
414 PM MST Sun Jul 4 2021

...FLASH FLOOD WARNING FOR THE MESCAL FIRE BURN SCAR REMAINS IN 
EFFECT UNTIL 715 PM MST THIS EVENING FOR GILA COUNTY...

At 414 PM MST, Doppler radar indicated thunderstorms producing heavy 
rain over the Mescal Fire Burn Scar. Between 1 and 3 inches of rain 
have fallen. Flash flooding is ongoing or expected to begin shortly.

HAZARD...Life threatening flash flooding. Thunderstorms producing
         flash flooding in and around the Mescal Fire Burn Scar.

SOURCE...Radar.

IMPACT...Life threatening flash flooding of areas in and around
         the Mescal Fire Burn Scar.

Some locations that will experience flash flooding include...
  Cutter.

This includes the following highways...
	AZ Route 70 between mile markers 259 and 268.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This is a life threatening situation. Heavy rainfall will cause 
extensive and severe flash flooding of creeks...streams...and 
ditches in the Mescal Fire Burn Scar. Severe debris flows can also 
be anticipated across roads. Roads and driveways may be washed away 
in places. If you encounter flood waters...climb to safety.

Move away from recently burned areas. Life-threatening flooding of 
creeks, roads and normally dry arroyos is likely. The heavy rains 
will likely trigger rockslides, mudslides and debris flows in steep 
terrain, especially in and around these areas.

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 3327 11052 3322 11066 3328 11070 3338 11066
      3340 11056 3335 11048 3330 11048

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

Rogers

741 
WGUS75 KPSR 050101
FFSPSR

Flash Flood Statement
National Weather Service Phoenix AZ
601 PM MST Sun Jul 4 2021

AZC007-050215-
/O.CON.KPSR.FF.W.0019.000000T0000Z-210705T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Gila AZ-
601 PM MST Sun Jul 4 2021

...FLASH FLOOD WARNING FOR THE MESCAL FIRE BURN SCAR REMAINS IN 
EFFECT UNTIL 715 PM MST THIS EVENING FOR GILA COUNTY...

At 601 PM MST, Doppler radar indicated thunderstorms producing heavy 
rain over the Mescal Fire Burn Scar. Between 1 and 3 inches of rain 
have fallen. Flash flooding is ongoing or expected to begin shortly.

HAZARD...Life threatening flash flooding. Thunderstorms producing
         flash flooding in and around the Mescal Fire Burn Scar.

SOURCE...Radar.

IMPACT...Life threatening flash flooding of areas in and around
         the Mescal Fire Burn Scar.

Some locations that will experience flash flooding include...
  Cutter.

This includes the following highways...
	AZ Route 70 between mile markers 259 and 268.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

This is a life threatening situation. Heavy rainfall will cause 
extensive and severe flash flooding of creeks...streams...and 
ditches in the Mescal Fire Burn Scar. Severe debris flows can also 
be anticipated across roads. Roads and driveways may be washed away 
in places. If you encounter flood waters...climb to safety.

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

&&

LAT...LON 3327 11052 3322 11066 3328 11070 3338 11066
      3340 11056 3335 11048 3330 11048

FLASH FLOOD...RADAR INDICATED
FLASH FLOOD DAMAGE THREAT...CONSIDERABLE

$$

Rogers

333 
WGUS75 KPSR 050218
FFSPSR

Flash Flood Statement
National Weather Service Phoenix AZ
718 PM MST Sun Jul 4 2021

AZC007-050228-
/O.EXP.KPSR.FF.W.0019.000000T0000Z-210705T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Gila AZ-
718 PM MST Sun Jul 4 2021

...FLASH FLOOD WARNING FOR THE MESCAL FIRE BURN SCAR HAS EXPIRED FOR 
GILA COUNTY...

The heavy rain has ended. Flooding is no longer expected to pose a 
threat. Please continue to heed remaining road closures.

LAT...LON 3327 11052 3322 11066 3328 11070 3338 11066
      3340 11056 3335 11048 3330 11048

$$

Rogers

The office that day

Everything else NWS Phoenix, AZ issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 3, 5:11 PM MST	Special Weather Statement	PSR		49 min
Jul 3, 5:20 PM MST	Special Weather Statement	PSR		25 min
Jul 3, 5:29 PM MST	Areal Flood Advisory	PSR	Pinal	3 hr
Jul 3, 5:32 PM MST	Special Weather Statement	PSR	Maricopa	43 min
Jul 3, 5:38 PM MST	Flash Flood Warning Considerable damage threat	PSR	Gila	4 hr
Jul 3, 5:41 PM MST	Dust Storm Warning	PSR	Maricopa, Pinal	44 min
Jul 3, 5:43 PM MST	Dust Storm Warning	PSR	Maricopa	62 min
Jul 3, 5:56 PM MST	Areal Flood Advisory	PSR	Maricopa	3 hr
Jul 3, 6:05 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	4 hr
Jul 3, 6:10 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	4 hr
Jul 3, 6:20 PM MST	Special Weather Statement	PSR	Maricopa	40 min
Jul 3, 6:23 PM MST	Flash Flood Warning Considerable damage threat	PSR	Gila, Maricopa	4 hr
Jul 3, 6:31 PM MST	Special Weather Statement	PSR	Gila	44 min
Jul 3, 6:43 PM MST	Dust Storm Warning	PSR	La Paz, Maricopa, Pinal, Yuma	62 min
Jul 3, 6:46 PM MST	Flash Flood Warning Considerable damage threat	PSR	Gila, Maricopa	4 hr
Jul 3, 7:13 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	4 hr
Jul 4, 3:43 PM MST	Special Weather Statement	PSR	Gila	32 min
Jul 4, 4:10 PM MST	Flash Flood Warning Considerable damage threat	PSR	Gila	4 hr
Jul 4, 4:36 PM MST	Special Weather Statement	PSR	Gila	24 min
Jul 4, 4:51 PM MST	Special Weather Statement	PSR	Gila	39 min

Nearby

Flash Flood Warnings in Arizona, 2021 Every flash flood warning in 2021

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.