Alert archive / Arizona / Flash Flood Warnings in 2012

Flash Flood Warning 15, NWS Phoenix, AZ

July 14, 2012Maricopa County, Arizona

NWS Phoenix, AZ issued this flash flood warning at Jul 14, 2012, 2:02 PM MST for Maricopa County, Arizona. It was in force for 3 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 14, 2012, 2:02 PM MST (21:02 UTC)
Expired
Jul 14, 2012, 5:00 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), 87 km from the middle of the area, began a volume at 21:02 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

TimeReportWhereRemark
Jul 14, 2:25 PM MSTFLASH FLOODMobile, AZHIGHWAY 238 CLOSED BETWEEN MILE POST 0 AND 38 DUE TO FLOODING - FROM ADOT

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, 9.0 hours before the alert went out and 82 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-pSkew-T log-p diagram, Phoenix, AZ at 12:00Z on 2012-07-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1064 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Phoenix, AZ at 12:00Z on 2012-07-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 40 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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.

763 
WGUS55 KPSR 142102
FFWPSR
AZC013-150000-
/O.NEW.KPSR.FF.W.0015.120714T2102Z-120715T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTH CENTRAL MARICOPA COUNTY IN SOUTH CENTRAL ARIZONA...
  THIS INCLUDES GILA BEND...

* UNTIL 500 PM MST

* AT 155 PM MST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED   
  SLOWLY MOVING THUNDERSTORMS PRODUCING HEAVY RAINFALL WITH A        
  POTENTIAL OF FLASH FLOODING OVER THE WARNED AREA. ADDITIONAL       
  RAINFALL OF 1 TO 2 INCHES WITHIN PORTIONS OF THE WARNED AREA IS    
  LIKELY THROUGH 5 PM. 

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SONORAN
  NATIONAL MONUMENT...ESTRELLA...COTTON CENTER AND BOSQUE

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WARNING MEANS THAT PEOPLE ALONG THE BANKS OF WASHES AND
CREEKS SHOULD MOVE TO HIGHER GROUND IMMEDIATELY. NORMALLY DRY WASHES
AND STREAMS WILL SUDDENLY HAVE RUNNING WATER AND MAKE UNBRIDGED
CROSSINGS IMPASSABLE. STREETS...UNDERPASSES...AND LOW SPOTS WILL
BECOME INUNDATED MAKING DRIVING HAZARDOUS IN THE WARNED AREA.

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 3309 11270 3309 11220 3281 11220 3267 11220
      3252 11220 3251 11221 3250 11268

$$

KUHLMAN

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 13, 5:16 PM MSTSpecial Weather StatementPSRYuma59 min
Jul 13, 5:21 PM MSTSpecial Weather StatementPSRYuma54 min
Jul 13, 5:30 PM MSTSevere Thunderstorm WarningPSRLa Paz60 min
Jul 13, 5:37 PM MSTSpecial Weather StatementPSR38 min
Jul 13, 6:02 PM MSTFlash Flood WarningPSRLa Paz, Yuma118 min
Jul 13, 6:42 PM MSTSevere Thunderstorm WarningPSRLa Paz, Yuma43 min
Jul 13, 6:54 PM MSTFlash Flood WarningPSRLa Paz, Yuma111 min
Jul 13, 7:30 PM MSTAreal Flood AdvisoryPSRLa Paz2 hr
Jul 13, 7:57 PM MSTAreal Flood AdvisoryPSRLa Paz, Yuma2 hr
Jul 13, 8:33 PM MSTAreal Flood AdvisoryPSRLa Paz117 min
Jul 13, 8:38 PM MSTFlash Flood WarningPSRYuma112 min
Jul 13, 9:47 PM MSTAreal Flood AdvisoryPSRLa Paz118 min
Jul 13, 10:28 PM MSTAreal Flood AdvisoryPSRLa Paz, Yuma3 hr
Jul 14, 11:01 AM MSTSpecial Weather StatementPSRLa Paz44 min
Jul 14, 11:37 AM MSTAreal Flood AdvisoryPSRLa Paz113 min
Jul 14, 11:40 AM MSTAreal Flood AdvisoryPSRLa Paz2 hr
Jul 14, 11:52 AM MSTSpecial Weather StatementPSRLa Paz38 min
Jul 14, 12:15 PM MSTAreal Flood AdvisoryPSRLa Paz2 hr
Jul 14, 12:34 PM MSTFlash Flood WarningPSRLa Paz3 hr
Jul 14, 12:38 PM MSTFlash Flood WarningPSRLa Paz3 hr
Jul 14, 12:49 PM MSTFlash Flood WarningPSRMaricopa3 hr
Jul 14, 1:20 PM MSTAreal Flood AdvisoryPSRMaricopa115 min
Jul 14, 2:28 PM MSTSpecial Weather StatementPSR47 min
Jul 14, 2:32 PM MSTAreal Flood AdvisoryPSRMaricopa, Pinal118 min
Jul 14, 2:42 PM MSTAreal Flood AdvisoryPSRMaricopa, Pinal2 hr
Jul 14, 2:51 PM MSTAreal Flood AdvisoryPSRGila114 min
Jul 14, 2:53 PM MSTAreal Flood AdvisoryPSRLa Paz, Maricopa112 min
Jul 14, 3:01 PM MSTSevere Thunderstorm WarningPSRGila59 min
Jul 14, 3:14 PM MSTFlash Flood WarningPSRLa Paz2 hr
Jul 14, 3:21 PM MSTAreal Flood AdvisoryPSRMaricopa114 min
Jul 14, 3:23 PM MSTBlowing Dust AdvisoryPSR97 min
Jul 14, 3:27 PM MSTFlash Flood WarningPSRLa Paz, Maricopa2 hr
Jul 14, 3:35 PM MSTAreal Flood AdvisoryPSRMaricopa115 min
Jul 14, 3:35 PM MSTSpecial Weather StatementPSR40 min
Jul 14, 3:43 PM MSTSevere Thunderstorm WarningPSRMaricopa, Pinal47 min
Jul 14, 3:44 PM MSTSpecial Weather StatementPSR46 min
Jul 14, 3:48 PM MSTFlash Flood WarningPSRMaricopa, Pinal117 min
Jul 14, 4:30 PM MSTAreal Flood AdvisoryPSRLa Paz, Yuma90 min
Jul 14, 4:50 PM MSTFlash Flood WarningPSRMaricopa2 hr

Nearby

Flash Flood Warnings in Arizona, 2012Every 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.