Alert archive / Arizona / Flash Flood Warnings in 2021

Flash Flood Warning 102, NWS Phoenix, AZ

July 27, 2021Gila County, Arizona

NWS Phoenix, AZ issued this flash flood warning at Jul 27, 2021, 1:44 PM MST for Gila County, Arizona. It was in force for 2 hr. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 27, 2021, 1:44 PM MST (20:44 UTC)
Expired: Jul 27, 2021, 4:03 PM MST
In force: 2 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 20:47 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.

What was reported inside it

Time	Report	Where	Remark
Jul 27, 2:30 PM MST	FLASH FLOOD	1 Se Globe, AZ	FLOW IN PINAL CREEK MADE BEER TREE CROSSING ROAD IMPASSABLE.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Phoenix, AZ (KPSR), launched 12:00Z, 8.7 hours before the alert went out and 109 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: 184 J/kg
Mixed-layer CIN: -167 J/kg
Mixed-layer LCL: 2126 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: -3 m²/s²
0-3 km storm-relative helicity: 26 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

139 
WGUS55 KPSR 272044
FFWPSR
AZC007-280045-
/O.NEW.KPSR.FF.W.0102.210727T2044Z-210728T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Phoenix AZ
144 PM MST Tue Jul 27 2021

The National Weather Service in Phoenix has issued a

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

* Until 545 PM MST.

* At 144 PM MST, Doppler radar and automated rain gauges indicated 
  thunderstorms producing heavy rain in Telegraph Burn Scar. Between 
  0.5 and 1 inch of rain has fallen. Flash flooding is expected to 
  begin shortly.

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

  SOURCE...Radar and automated gauges.

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

* Some locations that will experience flash flooding include...
  Six Shooter Canyon, Icehouse Canyon, Kellner Canyon, Globe, and 
  Claypool.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3345 11084 3346 11084 3337 11068 3328 11070
      3330 11087

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

$$

AJ

3 follow-up statements

794 
WGUS75 KPSR 272109
FFSPSR

Flash Flood Statement
National Weather Service Phoenix AZ
209 PM MST Tue Jul 27 2021

AZC007-280045-
/O.CON.KPSR.FF.W.0102.000000T0000Z-210728T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Gila AZ-
209 PM MST Tue Jul 27 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 545 PM MST THIS 
AFTERNOON FOR GILA COUNTY...

At 209 PM MST, Doppler radar and automated rain gauges indicated 
thunderstorms producing heavy rain on Telegraph Burn Scar and 
adjacent areas. Between 0.5 and 1.5 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 and automated gauges.

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

Some locations that will experience flash flooding include...
  Six Shooter Canyon, Icehouse Canyon, Kellner Canyon, Globe, and 
  Claypool.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3345 11084 3346 11084 3337 11068 3328 11070
      3330 11087

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

$$

AJ

019 
WGUS75 KPSR 272157
FFSPSR

Flash Flood Statement
National Weather Service Phoenix AZ
257 PM MST Tue Jul 27 2021

AZC007-280045-
/O.CON.KPSR.FF.W.0102.000000T0000Z-210728T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Gila AZ-
257 PM MST Tue Jul 27 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 545 PM MST THIS 
AFTERNOON FOR GILA COUNTY...

At 257 PM MST, Doppler radar and automated rain gauges indicated 
thunderstorms producing heavy rain in Telegraph Burn Scar. Between 
0.5 and 1.5 inches of rain have fallen. Flash flooding is likely 
ongoing.

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

SOURCE...Radar and automated gauges.

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

Some locations that will experience flash flooding include...
  Pinal Creek, Six Shooter Canyon, Icehouse Canyon, Kellner Canyon, 
  and Globe.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3338 11080 3340 11079 3337 11073 3330 11075
      3332 11083

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

$$

AJ

833 
WGUS75 KPSR 272303
FFSPSR

Flash Flood Statement
National Weather Service Phoenix AZ
403 PM MST Tue Jul 27 2021

AZC007-272313-
/O.CAN.KPSR.FF.W.0102.000000T0000Z-210728T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Gila AZ-
403 PM MST Tue Jul 27 2021

...FLASH FLOOD WARNING IS CANCELLED FOR GILA COUNTY...

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

LAT...LON 3338 11080 3340 11079 3337 11073 3330 11075
      3332 11083

$$

AJ

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 26, 5:26 PM MST	Areal Flood Advisory	PSR	La Paz	3 hr
Jul 26, 5:32 PM MST	Special Weather Statement	PSR	La Paz	28 min
Jul 26, 6:21 PM MST	Special Weather Statement	PSR	La Paz	24 min
Jul 26, 6:57 PM MST	Flash Flood Warning Considerable damage threat	PSR	La Paz	4 hr
Jul 26, 8:47 PM MST	Special Weather Statement	PSR		28 min
Jul 26, 9:24 PM MST	Areal Flood Advisory	PSR	Maricopa	3 hr

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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.