Alert archive / Arizona / Flash Flood Warnings in 2014

Flash Flood Warning 49, NWS Phoenix, AZ

September 6, 2014Maricopa County, Pinal County, Arizona

NWS Phoenix, AZ issued this flash flood warning at Sep 6, 2014, 7:00 PM MST for Maricopa County, Pinal County, Arizona. It was in force for 2 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: Sep 6, 2014, 7:00 PM MST (02:00 UTC)
Expired: Sep 6, 2014, 9:00 PM MST
In force: 2 hr
Issued by: NWS Phoenix, AZ
Area: Storm-based polygon
Flood severity: None

Counties Maricopa County, AZ, Pinal County, AZ

The radar

The Phoenix radar (KIWA), 50 km from the middle of the area, began a volume at 02:00 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, 2.0 hours before the alert went out and 39 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: 53 J/kg
Mixed-layer CIN: -131 J/kg
Mixed-layer LCL: 2584 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 17 m²/s²
0-3 km storm-relative helicity: 67 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.

956 
WGUS55 KPSR 070200
FFWPSR
AZC013-021-070400-
/O.NEW.KPSR.FF.W.0049.140907T0200Z-140907T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PHOENIX AZ
700 PM MST SAT SEP 6 2014

THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL MARICOPA COUNTY IN SOUTH CENTRAL ARIZONA...
  WEST CENTRAL PINAL COUNTY IN SOUTHEAST ARIZONA...

* UNTIL 900 PM MST

* AT 655 PM MST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED
  THUNDERSTORMS WITH VERY HEAVY RAIN FROM SOUTH OF KOMATKE...TO NEAR
  MOBILE. MOVEMENT WAS SLOWLY NORTHWEST.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO RAINBOW
  VALLEY...KOMATKE....AND HIGHWAY 238 EAST OF GILA BEND.

RADAR INDICATES THAT UP TO 2 INCHES OF RAIN HAS FALLEN FROM THE 
STORMS SINCE 600 PM. RUNOFF FROM THE RAIN WILL CAUSE FLOODING IN THE 
WARNING AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF NORMALLY
DRY WASHES AND CREEKS...ROADS...AND LOW LYING SPOTS. UNBRIDGED
CROSSINGS WILL BE ESPECIALLY DANGEROUS.

&&

LAT...LON 3302 11203 3299 11229 3319 11247 3335 11221
      3319 11200

$$

WOODALL

2 follow-up statements

603 
WGUS75 KPSR 070245
FFSPSR

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PHOENIX AZ
745 PM MST SAT SEP 6 2014

AZC013-021-070400-
/O.CON.KPSR.FF.W.0049.000000T0000Z-140907T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PINAL AZ-MARICOPA AZ-
745 PM MST SAT SEP 6 2014

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 900 PM MST FOR
CENTRAL MARICOPA AND WEST CENTRAL PINAL COUNTIES...

AT 742 PM MST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED 
SCATTERED SHOWERS AND THUNDERSTORMS...SOME WITH HEAVY RAIN...NEAR 
AND NORTH OF MOBILE. MOVEMENT WAS SLOWLY NORTHWEST.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MOBILE... 
KOMATKE...AND RAINBOW VALLEY.

ALTHOUGH THE HEAVY RAIN WHICH PROMPTED THE FLASH FLOOD WARNING HAD 
DIMINISHED...THE THREAT OF RUNOFF AND FLOODING WILL CONTINUE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF NORMALLY
DRY WASHES AND CREEKS...ROADS...AND LOW LYING SPOTS. UNBRIDGED
CROSSINGS WILL BE ESPECIALLY DANGEROUS.

&&

LAT...LON 3302 11203 3299 11229 3319 11247 3335 11221
      3319 11200

$$

WOODALL

442 
WGUS75 KPSR 070356
FFSPSR

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PHOENIX AZ
856 PM MST SAT SEP 6 2014

AZC013-021-070405-
/O.EXP.KPSR.FF.W.0049.000000T0000Z-140907T0400Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PINAL AZ-MARICOPA AZ-
856 PM MST SAT SEP 6 2014

...THE FLASH FLOOD WARNING WILL EXPIRE AT 900 PM MST FOR CENTRAL
MARICOPA AND WEST CENTRAL PINAL COUNTIES...

THE HEAVY RAIN WHICH PROMPTED THE WARNING HAS DIMINISHED. HOWEVER... 
SCATTERED SHOWERS CONTINUE BETWEEN KOMATKE AND AVONDALE.

IF YOU ENCOUNTER FLOODING...REMEMBER...TURN AROUND...DONT DROWN.

LAT...LON 3302 11203 3299 11229 3319 11247 3335 11221
      3319 11200

$$

WOODALL

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 6, 5:05 PM MST	Special Weather Statement	PSR	Pinal	40 min
Sep 6, 5:06 PM MST	Special Weather Statement	PSR		39 min
Sep 6, 5:19 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	41 min
Sep 6, 5:27 PM MST	Dust Storm Warning	PSR		3 hr
Sep 6, 5:35 PM MST	Special Weather Statement	PSR	Pinal	25 min
Sep 6, 5:39 PM MST	Special Weather Statement	PSR		36 min
Sep 6, 5:45 PM MST	Areal Flood Advisory	PSR	Pinal	2 hr
Sep 6, 6:04 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	41 min
Sep 6, 6:08 PM MST	Flash Flood Warning	PSR	Pinal	112 min
Sep 6, 6:16 PM MST	Special Weather Statement	PSR	Maricopa	44 min
Sep 6, 6:37 PM MST	Special Weather Statement	PSR	Maricopa	38 min
Sep 6, 6:46 PM MST	Special Weather Statement	PSR		44 min
Sep 6, 7:15 PM MST	Special Weather Statement	PSR		45 min
Sep 6, 7:34 PM MST	Special Weather Statement	PSR	Maricopa	41 min
Sep 6, 7:57 PM MST	Special Weather Statement	PSR	Maricopa	48 min
Sep 6, 8:29 PM MST	Areal Flood Advisory	PSR	Maricopa	2 hr
Sep 6, 8:41 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	36 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.