Alert archive / Arizona / Flash Flood Warnings in 2021

Flash Flood Warning 29, NWS Phoenix, AZ

July 10, 2021Gila County, Arizona

NWS Phoenix, AZ issued this flash flood warning at Jul 10, 2021, 7:10 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 10, 2021, 7:10 PM MST (02:10 UTC)
Expired: Jul 10, 2021, 11:15 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), 82 km from the middle of the area, began a volume at 02:13 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

Phoenix, AZ (KPSR), launched 00:00Z, 2.2 hours before the alert went out and 103 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: 965 J/kg
Mixed-layer CIN: -311 J/kg
Mixed-layer LCL: 3378 m above ground
0-6 km bulk shear: 32 kt
0-1 km storm-relative helicity: 2 m²/s²
0-3 km storm-relative helicity: 116 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

621 
WGUS55 KPSR 110210
FFWPSR
AZC007-110615-
/O.NEW.KPSR.FF.W.0029.210711T0210Z-210711T0615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Phoenix AZ
710 PM MST Sat Jul 10 2021

The National Weather Service in Phoenix has issued a

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

* Until 1115 PM MST.

* At 710 PM MST, Doppler radar indicated thunderstorms producing 
  heavy rain over the Salt Burn Scar. Between 0.5 and 2 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 Salt Burn
           Scar.

  SOURCE...Radar.

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

* Some locations that will experience flash flooding include...
  Roosevelt Estates.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3367 11077 3364 11075 3355 11083 3347 11092
      3352 11098 3360 11102 3363 11102 3366 11099
      3367 11094 3364 11092 3368 11084 3368 11083
      3365 11078

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

$$

MS

2 follow-up statements

175 
WGUS75 KPSR 110348
FFSPSR

Flash Flood Statement
National Weather Service Phoenix AZ
848 PM MST Sat Jul 10 2021

AZC007-110615-
/O.CON.KPSR.FF.W.0029.000000T0000Z-210711T0615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Gila AZ-
848 PM MST Sat Jul 10 2021

...FLASH FLOOD WARNING FOR THE SALT BURN SCAR REMAINS IN EFFECT 
UNTIL 1115 PM MST THIS EVENING FOR GILA COUNTY...

At 848 PM MST, Doppler radar indicated thunderstorms producing heavy 
rain over the Salt Burn Scar. Between 0.5 and 2 inches of rain have 
fallen. Flash flooding is ongoing or expected to begin shortly.

Excessive rainfall over the burn scar will result in debris flow 
moving through the Pinto Creek area. The debris flow can consist of 
rock, mud, vegetation and other loose materials.

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

SOURCE...Radar.

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

Some locations that will experience flash flooding include...
  Roosevelt Estates.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3367 11077 3364 11075 3355 11083 3347 11092
      3352 11098 3360 11102 3363 11102 3366 11099
      3367 11094 3364 11092 3368 11084 3368 11083
      3365 11078

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

$$

Iniguez

278 
WGUS75 KPSR 110606
FFSPSR

Flash Flood Statement
National Weather Service Phoenix AZ
1106 PM MST Sat Jul 10 2021

AZC007-110616-
/O.EXP.KPSR.FF.W.0029.000000T0000Z-210711T0615Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Gila AZ-
1106 PM MST Sat Jul 10 2021

...FLASH FLOOD WARNING FOR THE SALT BURN SCAR WILL EXPIRE AT 1115 PM 
MST THIS EVENING 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 3367 11077 3364 11075 3355 11083 3347 11092
      3352 11098 3360 11102 3363 11102 3366 11099
      3367 11094 3364 11092 3368 11084 3368 11083
      3365 11078

$$

Iniguez

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 5:37 PM MST	Special Weather Statement	PSR	Gila	38 min
Jul 10, 5:45 PM MST	Severe Thunderstorm Warning	PSR	Gila	45 min
Jul 10, 6:06 PM MST	Special Weather Statement	PSR	Gila	39 min
Jul 10, 6:24 PM MST	Severe Thunderstorm Warning	PSR	Gila, Maricopa, Pinal	36 min
Jul 10, 6:42 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	33 min
Jul 10, 7:00 PM MST	Severe Thunderstorm Warning	PSR	Gila, Maricopa, Pinal	45 min
Jul 10, 7:12 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	33 min
Jul 10, 7:27 PM MST	Dust Storm Warning	PSR	Maricopa	63 min
Jul 10, 7:31 PM MST	Dust Storm Warning	PSR	Maricopa, Pinal	59 min
Jul 10, 7:45 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	30 min
Jul 10, 8:16 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	44 min
Jul 10, 8:29 PM MST	Dust Storm Warning	PSR	Maricopa, Pinal	91 min
Jul 10, 8:42 PM MST	Areal Flood Advisory	PSR	Maricopa, Pinal	3 hr
Jul 10, 9:00 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	45 min
Jul 10, 9:48 PM MST	Special Weather Statement	PSR		57 min
Jul 10, 9:54 PM MST	Special Weather Statement	PSR	Pinal	36 min
Jul 10, 10:25 PM MST	Special Weather Statement	PSR		35 min
Jul 10, 10:31 PM MST	Dust Storm Advisory	PSR	Maricopa, Yuma	89 min
Jul 10, 10:43 PM MST	Dust Storm Warning	PSR	Maricopa, Yuma	62 min
Jul 10, 11:19 PM MST	Dust Storm Warning	PSR	Yuma	56 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.