Alert archive / Arizona / Flash Flood Warnings in 2015

Flash Flood Warning 13, NWS Phoenix, AZ

August 14, 2015La Paz County, Arizona

NWS Phoenix, AZ issued this flash flood warning at Aug 14, 2015, 2:23 PM MST for La Paz 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: Aug 14, 2015, 2:23 PM MST (21:23 UTC)
Expired: Aug 14, 2015, 5:15 PM MST
In force: 3 hr
Issued by: NWS Phoenix, AZ
Area: Storm-based polygon
Flood severity: None

County La Paz County, AZ

The radar

The Yuma radar (KYUX), 143 km from the middle of the area, began a volume at 21:22 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

Time	Report	Where	Remark
Aug 14, 4:10 PM MST	FLOOD	Quartzsite, AZ	MINOR FLOODING AROUND TOWN WITH WASHINGTON ST CLOSED TO TRAFFIC

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, 9.4 hours before the alert went out and 213 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: 19 J/kg
Mixed-layer CIN: -394 J/kg
Mixed-layer LCL: 3376 m above ground
0-6 km bulk shear: 13 kt
0-1 km storm-relative helicity: 5 m²/s²
0-3 km storm-relative helicity: 31 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.

385 
WGUS55 KPSR 142123
FFWPSR
AZC012-150015-
/O.NEW.KPSR.FF.W.0013.150814T2123Z-150815T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PHOENIX AZ
223 PM MST FRI AUG 14 2015

THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A

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

* UNTIL 515 PM MST
    
* AT 222 PM MST...DOPPLER RADAR INDICATED A THUNDERSTORM PRODUCING 
  HEAVY RAIN ACROSS THE WARNED AREA. RADAR ESTIMATES OVER ONE AND A 
  HALF INCHES OF RAIN HAS FALLEN AROUND AND NORTH OF QUARTZSITE IN 
  THE PAST HOUR. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY...AND 
  MAY IMPACT HIGHWAY 95 AND LOCAL ROADS AROUND THE CITY OF 
  QUARTZSITE.

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  QUARTZSITE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

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

&&

LAT...LON 3380 11417 3371 11415 3365 11414 3364 11424
      3367 11431 3376 11436 3384 11435

$$

18

3 follow-up statements

977 
WGUS75 KPSR 142204
FFSPSR

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PHOENIX AZ
304 PM MST FRI AUG 14 2015

AZC012-150015-
/O.CON.KPSR.FF.W.0013.000000T0000Z-150815T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LA PAZ AZ-
304 PM MST FRI AUG 14 2015

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 515 PM MST FOR
CENTRAL LA PAZ COUNTY...

AT 302 PM MST...DOPPLER RADAR INDICATED THUNDERSTORMS STILL 
PRODUCING MODERATE RAIN ACROSS THE WARNED AREA. RADAR ESTIMATES 
BETWEEN ONE AND A HALF AND TWO AND A HALF INCHES OF RAIN HAS FALLEN 
IN THE PAST HOUR AND A HALF OVER THE WARNED AREA. FLASH FLOODING IS 
OCCURRING OR WILL BEGIN SHORTLY...ESPECIALLY ALONG ROADS NORTH OF 
QUARTZSITE ALONG HIGHWAY 95.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
QUARTZSITE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

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

&&

LAT...LON 3380 11417 3371 11415 3365 11414 3364 11424
      3367 11431 3376 11436 3384 11435

$$

18

498 
WGUS75 KPSR 142323
FFSPSR

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PHOENIX AZ
423 PM MST FRI AUG 14 2015

AZC012-150015-
/O.CON.KPSR.FF.W.0013.000000T0000Z-150815T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LA PAZ AZ-
423 PM MST FRI AUG 14 2015

...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 515 PM MST FOR
CENTRAL LA PAZ COUNTY...

AT 422 PM MST...DOPPLER RADAR INDICATED RAIN HAS ENDED ACROSS THE 
WARNED AREA. HOWEVER...BETWEEN ONE AND TWO AND A HALF INCHES OF RAIN 
FELL IN A SHORT PERIOD OF TIME EARLIER THIS AFTERNOON...CAUSING 
FLOODING OF SOME SURFACE STREETS AROUND QUARTZSITE.

SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
QUARTZSITE.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DONT DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

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

&&

LAT...LON 3380 11417 3371 11415 3365 11414 3364 11424
      3367 11431 3376 11436 3384 11435

$$

18

636 
WGUS75 KPSR 150013
FFSPSR

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PHOENIX AZ
513 PM MST FRI AUG 14 2015

AZC012-150023-
/O.EXP.KPSR.FF.W.0013.000000T0000Z-150815T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
LA PAZ AZ-
513 PM MST FRI AUG 14 2015

...THE FLASH FLOOD WARNING FOR CENTRAL LA PAZ COUNTY WILL EXPIRE AT
515 PM MST...

THE HEAVY RAIN HAS ENDED WITH WATER RECEDING...AND FLOODING IS NO 
LONGER EXPECTED TO POSE A THREAT.

LAT...LON 3380 11417 3371 11415 3365 11414 3364 11424
      3367 11431 3376 11436 3384 11435

$$

18

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 14, 1:42 PM MST	Areal Flood Advisory	PSR	La Paz	2 hr
Aug 14, 1:46 PM MST	Special Weather Statement	PSR		29 min
Aug 14, 2:00 PM MST	Special Weather Statement	PSR	Pinal	30 min
Aug 14, 2:28 PM MST	Special Weather Statement	PSR		47 min
Aug 14, 2:55 PM MST	Special Weather Statement	PSR		35 min
Aug 14, 4:50 PM MST	Special Weather Statement	PSR	Maricopa	40 min

Nearby

Flash Flood Warnings in Arizona, 2015 Every flash flood warning in 2015

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.