Alert archive / Arizona / Flash Flood Warnings in 2012

Flash Flood Warning 22, NWS Flagstaff, AZ

August 21, 2012Yavapai County, Arizona

NWS Flagstaff, AZ issued this flash flood warning at Aug 21, 2012, 1:16 PM MST for Yavapai County, Arizona. It was in force for 119 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 21, 2012, 1:16 PM MST (20:16 UTC)
Expired: Aug 21, 2012, 3:15 PM MST
In force: 119 min
Issued by: NWS Flagstaff, AZ
Area: Storm-based polygon
Flood severity: None

County Yavapai County, AZ

The radar

The Flagstaff radar (KFSX), 113 km from the middle of the area, began a volume at 20:17 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, 8.3 hours before the alert went out and 102 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: 931 J/kg
Mixed-layer CIN: -180 J/kg
Mixed-layer LCL: 1715 m above ground
0-6 km bulk shear: 14 kt
0-1 km storm-relative helicity: 20 m²/s²
0-3 km storm-relative helicity: 35 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.

820 
WGUS55 KFGZ 212016
FFWFGZ
AZC025-212215-
/O.NEW.KFGZ.FF.W.0022.120821T2016Z-120821T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
116 PM MST TUE AUG 21 2012

THE NATIONAL WEATHER SERVICE IN FLAGSTAFF HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTH CENTRAL YAVAPAI COUNTY IN WEST CENTRAL ARIZONA...

* UNTIL 315 PM MST

* AT 108 PM MST...RADAR INDICATED SLOW MOVING THUNDERSTORMS WERE     
  PRODUCING HEAVY RAINFALL OVER THE GLADIATOR BURN AREA. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THE HEAVY RAIN WILL LIKELY TRIGGER LIFE-THREATENING FLASH FLOODS...AS
WELL AS MUDSLIDES...ROCKSLIDES...AND DEBRIS FLOWS WITHIN AND
DOWNSTREAM OF THE GLADIATOR FIRE BURN AREA. ROADWAYS IN THE AREA WILL
LIKELY BE INUNDATED AND WASHED OUT. STREAMS IN THE AREA WILL FLOW FAR
ABOVE TYPICAL LEVELS AND WILL CARRY HEAVY AMOUNTS OF SEDIMENT.

AREAS IMPACTED BY THIS WARNING INCLUDE THE GLADIATOR FIRE BURN
AREA...THE COMMUNITY OF CROWN KING...CROWN KING ROAD...SENATOR
HIGHWAY...AND POTENTIALLY SECTIONS OF WAGONER ROAD.

&&

LAT...LON 3431 11240 3432 11231 3424 11236 3423 11241

$$

41

1 follow-up statement

424 
WGUS75 KFGZ 212214
FFSFGZ

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
314 PM MST TUE AUG 21 2012

AZC025-212224-
/O.EXP.KFGZ.FF.W.0022.000000T0000Z-120821T2215Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
YAVAPAI AZ-
314 PM MST TUE AUG 21 2012

...THE FLASH FLOOD WARNING WILL EXPIRE AT 315 PM MST FOR SOUTH
CENTRAL YAVAPAI COUNTY...

THE FLASH FLOOD WARNING FOR THE GLADIATOR BURN AREA WILL BE ALLOWED 
TO EXPIRE AT 315 PM MST. NO REPORTS OF FLASH FLOODING HAVE BEEN 
RECEIVED AT THIS TIME. 

LAT...LON 3431 11240 3432 11231 3424 11236 3423 11241

$$
41

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 20, 5:45 PM MST	Areal Flood Advisory	FGZ	Yavapai	3 hr
Aug 20, 9:06 PM MST	Flash Flood Warning	FGZ	Coconino	9 hr
Aug 21, 1:07 PM MST	Areal Flood Advisory	FGZ	Yavapai	3 hr
Aug 21, 1:51 PM MST	Severe Thunderstorm Warning	FGZ	Yavapai	24 min
Aug 21, 2:19 PM MST	Special Weather Statement	FGZ		26 min
Aug 21, 2:45 PM MST	Severe Thunderstorm Warning	FGZ	Gila, Yavapai	30 min
Aug 21, 2:46 PM MST	Areal Flood Advisory	FGZ	Yavapai	3 hr
Aug 21, 2:59 PM MST	Severe Thunderstorm Warning	FGZ	Coconino, Navajo	31 min
Aug 21, 3:27 PM MST	Severe Thunderstorm Warning	FGZ	Gila	33 min
Aug 21, 3:29 PM MST	Flash Flood Warning	FGZ	Yavapai	3 hr
Aug 21, 3:37 PM MST	Severe Thunderstorm Warning	FGZ	Gila	23 min
Aug 21, 3:47 PM MST	Areal Flood Advisory	FGZ	Yavapai	3 hr
Aug 21, 3:53 PM MST	Flash Flood Warning	FGZ	Gila	4 hr
Aug 21, 4:05 PM MST	Flash Flood Warning	FGZ	Yavapai	3 hr
Aug 21, 4:08 PM MST	Areal Flood Advisory	FGZ	Navajo	3 hr
Aug 21, 4:09 PM MST	Severe Thunderstorm Warning	FGZ	Gila	36 min
Aug 21, 4:54 PM MST	Special Weather Statement	FGZ	Gila	66 min

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.