Alert archive / Arizona / Flash Flood Warnings in 2012

Flash Flood Warning 14, NWS Phoenix, AZ

July 14, 2012Maricopa County, Arizona

NWS Phoenix, AZ issued this flash flood warning at Jul 14, 2012, 12:49 PM MST for Maricopa County, Arizona. It was in force for 3 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 14, 2012, 12:49 PM MST (19:49 UTC)
Expired: Jul 14, 2012, 3:45 PM MST
In force: 3 hr
Issued by: NWS Phoenix, AZ
Area: Storm-based polygon
Flood severity: None

County Maricopa County, AZ

The radar

The Phoenix radar (KIWA), 157 km from the middle of the area, began a volume at 19:52 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, 7.8 hours before the alert went out and 125 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: 1064 J/kg
Mixed-layer CIN: -45 J/kg
Mixed-layer LCL: 1390 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 40 m²/s²
0-3 km storm-relative helicity: 113 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.

529 
WGUS55 KPSR 141949
FFWPSR
AZC013-142245-
/O.NEW.KPSR.FF.W.0014.120714T1949Z-120714T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PHOENIX AZ
1249 PM MST SAT JUL 14 2012

THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHWESTERN MARICOPA COUNTY IN SOUTH CENTRAL ARIZONA...

* UNTIL 345 PM MST

* AT 1240 PM MST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED  
  VERY HEAVY RAIN FROM PERSISTENT THUNDERSTORMS OVER THE WARNED AREA.
  RADAR ESTIMATES OF AROUND AN INCH OF RAIN HAS FALLEN IN THE PAST   
  30 MINUTES OVER AREAS THAT HAVE RECENTLY RECEIVED HEAVY            
  RAINFALL. ADDITIONAL HEAVY RAINFALL OF 1 TO 2 INCHES WILL BE       
  POSSIBLE IN THE WARNED AREA THROUGH 345 PM.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO GLADDEN AND
  AGUILA

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF NORMALLY
DRY WASHES AND CREEKS STREETS AND UNDERPASSES AND DETENTION BASINS
AFFECTING SOME COMMUNITY PARKS. UNBRIDGED CROSSINGS WILL BE 
ESPECIALLY DANGEROUS.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. REMEMBER TURN AROUND DONT DROWN.

&&

LAT...LON 3397 11332 3397 11305 3369 11309 3366 11333

$$

KUHLMAN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 13, 5:16 PM MST	Special Weather Statement	PSR	Yuma	59 min
Jul 13, 5:21 PM MST	Special Weather Statement	PSR	Yuma	54 min
Jul 13, 5:30 PM MST	Severe Thunderstorm Warning	PSR	La Paz	60 min
Jul 13, 5:37 PM MST	Special Weather Statement	PSR		38 min
Jul 13, 6:02 PM MST	Flash Flood Warning	PSR	La Paz, Yuma	118 min
Jul 13, 6:42 PM MST	Severe Thunderstorm Warning	PSR	La Paz, Yuma	43 min
Jul 13, 6:54 PM MST	Flash Flood Warning	PSR	La Paz, Yuma	111 min
Jul 13, 7:30 PM MST	Areal Flood Advisory	PSR	La Paz	2 hr
Jul 13, 7:57 PM MST	Areal Flood Advisory	PSR	La Paz, Yuma	2 hr
Jul 13, 8:33 PM MST	Areal Flood Advisory	PSR	La Paz	117 min
Jul 13, 8:38 PM MST	Flash Flood Warning	PSR	Yuma	112 min
Jul 13, 9:47 PM MST	Areal Flood Advisory	PSR	La Paz	118 min
Jul 13, 10:28 PM MST	Areal Flood Advisory	PSR	La Paz, Yuma	3 hr
Jul 14, 11:01 AM MST	Special Weather Statement	PSR	La Paz	44 min
Jul 14, 11:37 AM MST	Areal Flood Advisory	PSR	La Paz	113 min
Jul 14, 11:40 AM MST	Areal Flood Advisory	PSR	La Paz	2 hr
Jul 14, 11:52 AM MST	Special Weather Statement	PSR	La Paz	38 min
Jul 14, 12:15 PM MST	Areal Flood Advisory	PSR	La Paz	2 hr
Jul 14, 12:34 PM MST	Flash Flood Warning	PSR	La Paz	3 hr
Jul 14, 12:38 PM MST	Flash Flood Warning	PSR	La Paz	3 hr
Jul 14, 1:20 PM MST	Areal Flood Advisory	PSR	Maricopa	115 min
Jul 14, 2:02 PM MST	Flash Flood Warning	PSR	Maricopa	3 hr
Jul 14, 2:28 PM MST	Special Weather Statement	PSR		47 min
Jul 14, 2:32 PM MST	Areal Flood Advisory	PSR	Maricopa, Pinal	118 min
Jul 14, 2:42 PM MST	Areal Flood Advisory	PSR	Maricopa, Pinal	2 hr
Jul 14, 2:51 PM MST	Areal Flood Advisory	PSR	Gila	114 min
Jul 14, 2:53 PM MST	Areal Flood Advisory	PSR	La Paz, Maricopa	112 min
Jul 14, 3:01 PM MST	Severe Thunderstorm Warning	PSR	Gila	59 min
Jul 14, 3:14 PM MST	Flash Flood Warning	PSR	La Paz	2 hr
Jul 14, 3:21 PM MST	Areal Flood Advisory	PSR	Maricopa	114 min
Jul 14, 3:23 PM MST	Blowing Dust Advisory	PSR		97 min
Jul 14, 3:27 PM MST	Flash Flood Warning	PSR	La Paz, Maricopa	2 hr
Jul 14, 3:35 PM MST	Areal Flood Advisory	PSR	Maricopa	115 min
Jul 14, 3:35 PM MST	Special Weather Statement	PSR		40 min
Jul 14, 3:43 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	47 min
Jul 14, 3:44 PM MST	Special Weather Statement	PSR		46 min
Jul 14, 3:48 PM MST	Flash Flood Warning	PSR	Maricopa, Pinal	117 min
Jul 14, 4:30 PM MST	Areal Flood Advisory	PSR	La Paz, Yuma	90 min
Jul 14, 4:50 PM MST	Flash Flood Warning	PSR	Maricopa	2 hr

Nearby

Flash Flood Warnings in Arizona, 2012 Every flash flood warning in 2012

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.