Alert archive / Arizona / Flash Flood Warnings in 2014

Flash Flood Warning 13, NWS Phoenix, AZ

July 31, 2014Maricopa County, Arizona

NWS Phoenix, AZ issued this flash flood warning at Jul 31, 2014, 8:36 PM MST for Maricopa County, Arizona. It was in force for 114 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 31, 2014, 8:36 PM MST (03:36 UTC)
Expired: Jul 31, 2014, 10:30 PM MST
In force: 114 min
Issued by: NWS Phoenix, AZ
Area: Storm-based polygon
Flood severity: None

County Maricopa County, AZ

The radar

The Phoenix radar (KIWA), 112 km from the middle of the area, began a volume at 03:37 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, 3.6 hours before the alert went out and 80 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: 66 J/kg
Mixed-layer CIN: -169 J/kg
Mixed-layer LCL: 3061 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -2 m²/s²
0-3 km storm-relative helicity: 45 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

183 
WGUS55 KPSR 010336
FFWPSR
AZC013-010530-
/O.NEW.KPSR.FF.W.0013.140801T0336Z-140801T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PHOENIX AZ
836 PM MST THU JUL 31 2014

THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL MARICOPA COUNTY IN SOUTH CENTRAL ARIZONA...
  THIS INCLUDES WITTMANN...WICKENBURG...CIRCLE CITY...

* UNTIL 1030 PM MST

* AT 827 PM MST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED   
  VERY HEAVY RAIN THAT WILL CAUSE FLASH FLOODING. STRONG 
  THUNDERSTORMS JUST SOUTH OF THE WICKENBURG AREA HAVE PRODUCED 
  ONE HALF TO NEAR THREE QUARTERS OF AN INCH OF RAINFALL IN THE 
  LAST 20 MINUTES AND CONTINUE TO INDICATE VERY HEAVY RAINFALL.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO THE U.S.
  HIGHWAY 60 CORRIDOR SOUTH OF WICKENBURG...THE HASSAYAMPA RIVER 
  DRAINAGE...CIRCLE CITY...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOST FLOOD DEATHS OCCUR IN MOTORIZED VEHICLES. WHEN ENCOUNTERING
FLOODED ROADS...MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

TO REPORT FLOODING...PLEASE RELAY YOUR REPORT TO LOCAL LAW
ENFORCEMENT WHEN YOU CAN DO SO SAFELY.

&&

LAT...LON 3398 11264 3398 11263 3396 11257 3382 11249
      3373 11257 3363 11269 3396 11285 3399 11267

$$

NOLTE

2 follow-up statements

764 
WGUS75 KPSR 010404
FFSPSR

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PHOENIX AZ
904 PM MST THU JUL 31 2014

AZC013-010530-
/O.CON.KPSR.FF.W.0013.000000T0000Z-140801T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MARICOPA AZ-
904 PM MST THU JUL 31 2014

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1030 PM MST FOR
CENTRAL MARICOPA COUNTY...

AT 857 PM MST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED AN 
AREA OF THUNDERSTORMS PRODUCING VERY HEAVY RAIN THAT WILL CAUSE 
FLASH FLOODING. RADAR ESTIMATES THAT THE HIGHEST RAINFALL AMOUNTS 
HAVE OCCURRED ALONG US 60 BETWEEN WICKENBURG AND MORRISTOWN SO FAR. 
THE HEAVIEST RAINFALL AND STORM ACTIVITY HAS DRIFTED TO THE 
SOUTHWEST OF US 60 AND MAY CONTINUE TO IMPACT THE AREA AND INPUT 
ADDITIONAL RUNOFF INTO THE HASSAYAMPA AND SAN DOMINGO DRAINAGES. 
TRAVELERS ALONG PATTON AND AGUILA ROADS ACROSS NORTHWEST MARICOPA 
COUNTY SHOULD BE PREPARED FOR WATER COVERED ROADWAYS AS STORM 
ACTIVITY AND RUNOFF EXPANDS IN THAT DIRECTION.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WICKENBURG

PRECAUTIONARY/PREPAREDNESS ACTIONS...

MOST FLOOD DEATHS OCCUR IN MOTORIZED VEHICLES. WHEN ENCOUNTERING
FLOODED ROADS...MAKE THE SMART CHOICE...TURN AROUND...DONT DROWN.

&&

LAT...LON 3398 11264 3398 11263 3396 11257 3382 11249
      3373 11257 3363 11269 3396 11285 3399 11267

$$

NOLTE

800 
WGUS75 KPSR 010532
FFSPSR

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PHOENIX AZ
1032 PM MST THU JUL 31 2014

AZC013-010541-
/O.EXP.KPSR.FF.W.0013.000000T0000Z-140801T0530Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MARICOPA AZ-
1032 PM MST THU JUL 31 2014

...THE FLASH FLOOD WARNING HAS EXPIRED FOR CENTRAL MARICOPA COUNTY...

THE HEAVIEST RAINFALL ACTIVITY HAS TRANSITIONED ACROSS MORE RURAL
AREAS OF THE COUNTY. THE THREAT FOR HEAVY RAINFALL PRODUCING FLASH
FLOODING HAS ENDED...THEREFORE THE WARNING WILL BE ALLOWED TO 
EXPIRE.

WATCH FOR WATER ON AREA ROADWAYS AND STORM RUNOFF TO DRAIN 
INTO AREA WASHES AND LOW LYING AREAS THROUGH THE EVENING.

LAT...LON 3398 11264 3398 11263 3396 11257 3382 11249
      3373 11257 3363 11269 3396 11285 3399 11267

$$

NOLTE

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 31, 6:38 PM MST	Special Weather Statement	PSR	La Paz	52 min
Jul 31, 6:55 PM MST	Areal Flood Advisory	PSR	La Paz	110 min
Jul 31, 7:08 PM MST	Flash Flood Warning	PSR	La Paz	82 min
Jul 31, 7:43 PM MST	Special Weather Statement	PSR		47 min
Jul 31, 8:13 PM MST	Special Weather Statement	PSR	Maricopa	62 min
Jul 31, 8:44 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	61 min
Jul 31, 8:56 PM MST	Flash Flood Warning	PSR	Maricopa	79 min
Jul 31, 9:53 PM MST	Special Weather Statement	PSR	Maricopa	67 min
Jul 31, 10:13 PM MST	Flash Flood Warning	PSR	Maricopa	3 hr
Jul 31, 10:37 PM MST	Special Weather Statement	PSR	Maricopa	53 min
Jul 31, 10:58 PM MST	Flash Flood Warning	PSR	La Paz, Maricopa	3 hr
Jul 31, 11:02 PM MST	Areal Flood Advisory	PSR	Pinal	118 min
Jul 31, 11:22 PM MST	Special Weather Statement	PSR	Pinal	38 min
Jul 31, 11:33 PM MST	Special Weather Statement	PSR	Maricopa	42 min
Jul 31, 11:44 PM MST	Special Weather Statement	PSR		46 min
Aug 1, 12:00 AM MST	Areal Flood Advisory	PSR	Maricopa	2 hr
Aug 1, 12:05 AM MST	Areal Flood Advisory	PSR	Gila	115 min
Aug 1, 7:36 AM MST	Areal Flood Advisory	PSR	La Paz, Maricopa	114 min
Aug 1, 3:25 PM MST	Special Weather Statement	PSR	Gila	50 min
Aug 1, 3:31 PM MST	Areal Flood Advisory	PSR	Gila	119 min
Aug 1, 3:57 PM MST	Special Weather Statement	PSR	Gila	48 min
Aug 1, 4:07 PM MST	Special Weather Statement	PSR	Gila	38 min
Aug 1, 4:35 PM MST	Severe Thunderstorm Warning	PSR	Gila, Maricopa, Pinal	55 min
Aug 1, 4:45 PM MST	Severe Thunderstorm Warning	PSR	Gila, Maricopa	34 min

Nearby

Flash Flood Warnings in Arizona, 2014 Every flash flood warning in 2014

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.