Alert archive / Arizona / Flash Flood Warnings in 2021

Flash Flood Warning 13, NWS Phoenix, AZ

July 3, 2021Gila County, Arizona

NWS Phoenix, AZ issued this flash flood warning at Jul 3, 2021, 5:38 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 3, 2021, 5:38 PM MST (00:38 UTC)
Expired: Jul 3, 2021, 9:45 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), 68 km from the middle of the area, began a volume at 00:40 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, 0.6 hours before the alert went out and 75 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: 281 J/kg
Mixed-layer CIN: -14 J/kg
Mixed-layer LCL: 3054 m above ground
0-6 km bulk shear: 4 kt
0-1 km storm-relative helicity: -30 m²/s²
0-3 km storm-relative helicity: 3 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

283 
WGUS55 KPSR 040038
FFWPSR
AZC007-040445-
/O.NEW.KPSR.FF.W.0013.210704T0038Z-210704T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Phoenix AZ
538 PM MST Sat Jul 3 2021

The National Weather Service in Phoenix has issued a

* Flash Flood Warning for...
  Gila County in east central Arizona...

* Until 945 PM MST.

* At 538 PM MST, Doppler radar indicated thunderstorms producing 
  heavy rain across the Bush Fire burn scar. Between 0.5 and 1.3 
  inches of rain have fallen. Flash flooding is ongoing or expected 
  to begin shortly.

  HAZARD...Life threatening flash flooding. Thunderstorms
           producing flash flooding.

  SOURCE...Radar.

  IMPACT...Life threatening flash flooding of creeks and streams,
           urban areas, highways, streets and underpasses.

* Some locations that will experience flash flooding include...
  Tonto Basin and Punkin Center.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3392 11130 3381 11125 3370 11118 3368 11126
      3369 11132 3381 11136 3390 11140 3397 11140

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

$$

MS

2 follow-up statements

079 
WGUS75 KPSR 040249
FFSPSR

Flash Flood Statement
National Weather Service Phoenix AZ
749 PM MST Sat Jul 3 2021

AZC007-040445-
/O.CON.KPSR.FF.W.0013.000000T0000Z-210704T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Gila AZ-
749 PM MST Sat Jul 3 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 945 PM MST THIS 
EVENING FOR GILA COUNTY...

At 749 PM MST, Doppler radar indicated thunderstorms producing heavy 
rain had moved away from the Bush Fire Burn Scar. Water is expected 
to continue to drain in area creeks and washes toward Tonto Basin 
and Tonto Creek. Some creeks and road crossings may be closed due to 
high water.

HAZARD...Life threatening flash flooding. Thunderstorms producing
         flash flooding.

SOURCE...Radar.

IMPACT...Life threatening flash flooding of creeks and streams,
         urban areas, highways, streets and underpasses.

Some locations that will experience flash flooding include...
  Tonto Basin and Punkin Center.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3392 11130 3381 11125 3370 11118 3368 11126
      3369 11132 3381 11136 3390 11140 3397 11140

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

$$

MS

590 
WGUS75 KPSR 040442
FFSPSR

Flash Flood Statement
National Weather Service Phoenix AZ
942 PM MST Sat Jul 3 2021

AZC007-040452-
/O.EXP.KPSR.FF.W.0013.000000T0000Z-210704T0445Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Gila AZ-
942 PM MST Sat Jul 3 2021

...FLASH FLOOD WARNING WILL EXPIRE AT 945 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 3392 11130 3381 11125 3370 11118 3368 11126
      3369 11132 3381 11136 3390 11140 3397 11140

$$

SDB

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, 5:41 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, 3:09 PM MST	Flash Flood Warning Considerable damage threat	PSR	Gila	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.