Alert archive / Arizona / Flash Flood Warnings in 2013

Flash Flood Warning 13, NWS Phoenix, AZ

August 24, 2013La Paz County, Arizona

NWS Phoenix, AZ issued this flash flood warning at Aug 24, 2013, 11:47 AM MST for La Paz County, Arizona. It was in force for 118 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
Aug 24, 2013, 11:47 AM MST (18:47 UTC)
Expired
Aug 24, 2013, 1:45 PM MST
In force
118 min
Issued by
NWS Phoenix, AZ
Area
Storm-based polygon
Flood severity
None

County La Paz County, AZ

The radar

The Yuma radar (KYUX), 149 km from the middle of the area, began a volume at 18:46 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

Yuma Intl Airpor, AZ (KYUM), launched 12:00Z, 6.8 hours before the alert went out and 131 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, Yuma Intl Airpor, AZ at 12:00Z on 2013-08-24Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 664 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, Yuma Intl Airpor, AZ at 12:00Z on 2013-08-24The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 31 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
664 J/kg
Mixed-layer CIN
-291 J/kg
Mixed-layer LCL
1942 m above ground
0-6 km bulk shear
10 kt
0-1 km storm-relative helicity
31 m²/s²
0-3 km storm-relative helicity
3 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.

592 
WGUS55 KPSR 241847
FFWPSR
AZC012-242045-
/O.NEW.KPSR.FF.W.0013.130824T1847Z-130824T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PHOENIX AZ
1147 AM MST SAT AUG 24 2013

THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL LA PAZ COUNTY IN WEST CENTRAL ARIZONA...

* UNTIL 145 PM MST

* AT 1137 AM MST...NATIONAL WEATHER SERVICE METEOROLOGISTS 
  DETECTED VERY HEAVY RAIN THAT WILL CAUSE FLASH FLOODING. ISOLATED
  THUNDERSTORMS WITH HEAVY RAIN CONTINUED TO DEVELOP AND MOVE NORTH 
  ACROSS PORTIONS OF CENTRAL LA PAZ COUNTY...AND RADAR ESTIMATED THAT
  MORE THAN 1.5 INCHES FELL WEST OF BRENDA AND JUST SOUTH OF 
  INTERSTATE 10 SINCE 1045 AM. THIS RAIN WILL ADD TO SIGNIFICANT
  AMOUNTS THAT FELL IN THE WARNING AREA EARLIER THIS MORNING.

* THE STORM PRODUCING VERY HEAVY RAIN THAT WILL CAUSE FLASH
  FLOODING WILL LIKELY AFFECT MOTORISTS ON INTERSTATE 10 AND HIGHWAY
  60 SOUTHWEST OF VICKSBURG. 

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.

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

&&

LAT...LON 3374 11398 3375 11377 3358 11377 3356 11398

$$

CB
1 follow-up statement
879 
WGUS75 KPSR 242039
FFSPSR

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PHOENIX AZ
139 PM MST SAT AUG 24 2013

AZC012-242045-
/O.CON.KPSR.FF.W.0013.000000T0000Z-130824T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LA PAZ AZ-
139 PM MST SAT AUG 24 2013

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 145 PM MST FOR
CENTRAL LA PAZ COUNTY...

AT 135 PM MST...THUNDERSTORMS IN THE WARNING AREA HAD DIMINISHED 
SIGNIFICANTLY SINCE 1 PM AND RAINFALL TOTALS WERE MOSTLY LESS THAN 
ONE QUARTER INCH. AS A RESULT THE FLASH FLOOD WARNING WILL BE 
ALLOWED TO EXPIRE AT 145 PM.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO 
BRENDA...INTERSTATE 10 AND HIGHWAY 60.

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.

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

&&

LAT...LON 3374 11398 3375 11377 3358 11377 3356 11398

$$

CB

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 24, 3:19 AM MSTAreal Flood AdvisoryPSRMaricopa3 hr
Aug 24, 4:47 AM MSTFlash Flood WarningPSRMaricopa3 hr
Aug 24, 5:24 AM MSTAreal Flood AdvisoryPSRMaricopa3 hr
Aug 24, 5:53 AM MSTFlash Flood WarningPSRMaricopa3 hr
Aug 24, 6:28 AM MSTAreal Flood AdvisoryPSRLa Paz3 hr
Aug 24, 8:44 AM MSTFlash Flood WarningPSRMaricopa91 min
Aug 24, 9:33 AM MSTAreal Flood AdvisoryPSRLa Paz117 min
Aug 24, 9:47 AM MSTFlash Flood WarningPSRLa Paz118 min
Aug 24, 2:27 PM MSTSpecial Weather StatementPSR48 min
Aug 24, 3:24 PM MSTSpecial Weather StatementPSR66 min
Aug 24, 4:37 PM MSTSpecial Weather StatementPSR53 min

Nearby

Flash Flood Warnings in Arizona, 2013Every flash flood warning in 2013

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.