Alert archive / Arizona / Flash Flood Warnings in 2021

Flash Flood Warning 114, NWS Phoenix, AZ

July 30, 2021Gila County, Arizona

NWS Phoenix, AZ issued this flash flood warning at Jul 30, 2021, 4:50 PM MST for Gila County, Arizona. It was in force for 69 min. 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 30, 2021, 4:50 PM MST (23:50 UTC)
Expired: Jul 30, 2021, 5:59 PM MST
In force: 69 min
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), 73 km from the middle of the area, began a volume at 23:52 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 12:00Z, 11.8 hours before the alert went out and 100 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: 392 J/kg
Mixed-layer CIN: -170 J/kg
Mixed-layer LCL: 1882 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 40 m²/s²
0-3 km storm-relative helicity: 22 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

469 
WGUS55 KPSR 302350
FFWPSR
AZC007-310400-
/O.NEW.KPSR.FF.W.0114.210730T2350Z-210731T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Phoenix AZ
450 PM MST Fri Jul 30 2021

The National Weather Service in Phoenix has issued a

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

* Until 900 PM MST.

* At 450 PM MST, Doppler radar and automated rain gauges indicated 
  thunderstorms producing heavy rain over the Telegraph Burn Scar. 
  Between 0.5 and 1 inch of rain has fallen over the Bloody Tanks 
  Wash basin. Flash flooding is ongoing or expected to begin shortly.

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

  SOURCE...Radar and automated gauges.

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

* Some locations that will experience flash flooding include...
  Globe, Miami and Claypool.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3332 11092 3334 11095 3339 11095 3340 11090
      3342 11084 3341 11083 3337 11085 3333 11088
      3332 11090

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

$$

MS

1 follow-up statement

554 
WGUS75 KPSR 310059
FFSPSR

Flash Flood Statement
National Weather Service Phoenix AZ
559 PM MST Fri Jul 30 2021

AZC007-310109-
/O.CAN.KPSR.FF.W.0114.000000T0000Z-210731T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Gila AZ-
559 PM MST Fri Jul 30 2021

...FLASH FLOOD WARNING FOR THE TELEGRAPH BURN SCAR IS CANCELLED FOR 
GILA COUNTY...

The heavy rain has ended and county emergency management reported 
minimal flow in Bloody Tanks Wash. Flooding is no longer expected to 
pose a threat. Please continue to heed remaining road closures.

LAT...LON 3332 11092 3334 11095 3339 11095 3340 11090
      3342 11084 3341 11083 3337 11085 3333 11088
      3332 11090

$$

MS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 29, 6:17 PM MST	Flash Flood Warning Considerable damage threat	PSR	Maricopa	3 hr
Jul 29, 8:02 PM MST	Flash Flood Warning Considerable damage threat	PSR	Gila	6 hr
Jul 30, 7:28 AM MST	Areal Flood Warning	PSR	Gila	13 hr
Jul 30, 12:36 PM MST	Special Weather Statement	PSR	La Paz	24 min
Jul 30, 1:03 PM MST	Special Weather Statement	PSR		27 min
Jul 30, 1:19 PM MST	Areal Flood Advisory	PSR	La Paz	3 hr
Jul 30, 2:24 PM MST	Special Weather Statement	PSR		36 min
Jul 30, 2:59 PM MST	Special Weather Statement	PSR		31 min
Jul 30, 4:43 PM MST	Special Weather Statement	PSR		32 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.