Alert archive / Arizona / Flash Flood Warnings in 2014

Flash Flood Warning 39, NWS Phoenix, AZ

August 19, 2014Maricopa County, Arizona

NWS Phoenix, AZ issued this flash flood warning at Aug 19, 2014, 4:17 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: Aug 19, 2014, 4:17 PM MST (23:17 UTC)
Expired: Aug 19, 2014, 7:15 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), 95 km from the middle of the area, began a volume at 23:16 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, 11.3 hours before the alert went out and 64 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: 1643 J/kg
Mixed-layer CIN: -21 J/kg
Mixed-layer LCL: 1179 m above ground
0-6 km bulk shear: 6 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 30 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.

231 
WGUS55 KPSR 192317
FFWPSR
AZC013-200215-
/O.NEW.KPSR.FF.W.0039.140819T2317Z-140820T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PHOENIX AZ
417 PM MST TUE AUG 19 2014

THE NATIONAL WEATHER SERVICE IN PHOENIX HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL MARICOPA COUNTY IN SOUTH CENTRAL ARIZONA...
  THIS INCLUDES WITTMANN...CIRCLE CITY...

* UNTIL 715 PM MST

* AT 412 PM MST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED   
VERY HEAVY RAIN THAT WILL CAUSE FLASH FLOODING. RAINFALL AMOUNTS IN 
EXCESS OF ONE INCH HAVE BEEN ESTIMATED SOUTH OF WICKENBURG IN THE 
LAST HOUR.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO 
MORRISTOWN...WITTMANN...AND CIRCLE CITY. HIGH WATER MAY IMPACT 
PORTIONS OF HIGHWAY 60.

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 3392 11240 3391 11237 3367 11238 3364 11250
      3361 11278 3382 11272 3392 11242

$$

18

3 follow-up statements

157 
WGUS75 KPSR 200004
FFSPSR

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PHOENIX AZ
504 PM MST TUE AUG 19 2014

AZC013-200215-
/O.CON.KPSR.FF.W.0039.000000T0000Z-140820T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MARICOPA AZ-
504 PM MST TUE AUG 19 2014

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 715 PM MST FOR
CENTRAL MARICOPA COUNTY...

AT 459 PM MST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED 
THUNDERSTORMS PRODUCING VERY HEAVY RAIN EXTENDING FROM NEAR BLACK 
CANYON CITY TO WITTMANN. ADDITIONAL SHOWERS CONTINUED SOUTHWEST OF 
CIRCLE CITY. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MORRISTOWN
AND CIRCLE CITY

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 3392 11240 3391 11237 3367 11238 3364 11250
      3361 11278 3382 11272 3392 11242

$$

18

000 
WGUS75 KPSR 200122
FFSPSR

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PHOENIX AZ
622 PM MST TUE AUG 19 2014

AZC013-200215-
/O.CON.KPSR.FF.W.0039.000000T0000Z-140820T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MARICOPA AZ-
622 PM MST TUE AUG 19 2014

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 715 PM MST FOR
CENTRAL MARICOPA COUNTY...

AT 620 PM MST...NATIONAL WEATHER SERVICE METEOROLOGISTS DETECTED 
MORE THUNDERSTORMS APPROACHING THE AREA BETWEEN SUN CITY AND 
WITTMANN. THESE STORMS WILL PRODUCE MORE HEAVY RAIN CAPABLE OF MORE 
FLOODING IN THE AREA.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MORRISTOWN 
AND WITTMANN.

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 3392 11240 3391 11237 3367 11238 3364 11250
      3361 11278 3382 11272 3392 11242

$$

18

446 
WGUS75 KPSR 200208
FFSPSR

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PHOENIX AZ
708 PM MST TUE AUG 19 2014

AZC013-200219-
/O.EXP.KPSR.FF.W.0039.000000T0000Z-140820T0215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
MARICOPA AZ-
708 PM MST TUE AUG 19 2014

...THE FLASH FLOOD WARNING WILL EXPIRE AT 715 PM MST FOR CENTRAL
MARICOPA COUNTY...

LAT...LON 3392 11240 3391 11237 3367 11238 3364 11250
      3361 11278 3382 11272 3392 11242

$$

18

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 18, 7:05 PM MST	Areal Flood Advisory	PSR	La Paz	115 min
Aug 19, 6:27 AM MST	Areal Flood Advisory	PSR	Maricopa, Pinal	108 min
Aug 19, 6:52 AM MST	Flash Flood Watch	PSR		11 hr
Aug 19, 7:08 AM MST	Flash Flood Warning	PSR	Maricopa	112 min
Aug 19, 9:03 AM MST	Flash Flood Warning	PSR	Maricopa	117 min
Aug 19, 10:06 AM MST	River Flood Warning	PSR	Maricopa	10 hr
Aug 19, 10:10 AM MST	Areal Flood Advisory	PSR	Maricopa	3 hr
Aug 19, 11:05 AM MST	Flash Flood Warning	PSR	Maricopa	115 min
Aug 19, 11:39 AM MST	Special Weather Statement	PSR	Maricopa	51 min
Aug 19, 12:11 PM MST	Flash Flood Warning	PSR	Maricopa	2 hr
Aug 19, 1:07 PM MST	Flash Flood Warning	PSR	Maricopa	113 min
Aug 19, 1:13 PM MST	Areal Flood Advisory	PSR	Gila, Maricopa, Pinal	2 hr
Aug 19, 1:23 PM MST	Special Weather Statement	PSR	Pinal	52 min
Aug 19, 1:30 PM MST	Blowing Dust Advisory	PSR		71 min
Aug 19, 2:55 PM MST	Areal Flood Advisory	PSR	Maricopa	3 hr
Aug 19, 3:02 PM MST	Flash Flood Warning	PSR	Maricopa	118 min
Aug 19, 3:17 PM MST	Areal Flood Advisory	PSR	Gila	118 min
Aug 19, 4:53 PM MST	Flash Flood Warning	PSR	Maricopa	112 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.