Alert archive / Arizona / Flash Flood Warnings in 2012

Flash Flood Warning 28, NWS Flagstaff, AZ

August 22, 2012Yavapai County, Arizona

NWS Flagstaff, AZ issued this flash flood warning at Aug 22, 2012, 4:17 PM MST for Yavapai 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 22, 2012, 4:17 PM MST (23:17 UTC)
Expired: Aug 22, 2012, 6:15 PM MST
In force: 118 min
Issued by: NWS Flagstaff, AZ
Area: Storm-based polygon
Flood severity: None

County Yavapai County, AZ

The radar

The Flagstaff radar (KFSX), 134 km from the middle of the area, began a volume at 23:17 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

Flgstf/Belemont, AZ (KFGZ), launched 12:00Z, 11.3 hours before the alert went out and 111 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1304 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 14 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.

543 
WGUS55 KFGZ 222317
FFWFGZ
AZC025-230115-
/O.NEW.KFGZ.FF.W.0028.120822T2317Z-120823T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
417 PM MST WED AUG 22 2012

THE NATIONAL WEATHER SERVICE IN FLAGSTAFF HAS ISSUED A

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

* UNTIL 615 PM MST

* AT 412 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  HEAVY RAIN IN EXCESS OF 3 INCHES ACROSS THE AREA EXTENDING FROM    
  SKULL VALLEY TO IRON SPRINGS INCLUDING HIGHWAY 96. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF COUNTRY 
ROADS...AS WELL AS NORMALLY DRY WASHES.

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.

&&

LAT...LON 3450 11274 3458 11275 3461 11266 3462 11257
      3454 11256 3450 11259 3448 11263 3447 11266
      3449 11272

$$

MCCOLLUM

2 follow-up statements

883 
WGUS75 KFGZ 230015
FFSFGZ

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
515 PM MST WED AUG 22 2012

AZC025-230115-
/O.CON.KFGZ.FF.W.0028.000000T0000Z-120823T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
YAVAPAI AZ-
515 PM MST WED AUG 22 2012

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 615 PM MST FOR
CENTRAL YAVAPAI COUNTY...

AT 504 PM MST...FLAGSTAFF NATIONAL WEATHER SERVICE RADAR INDICATED 
THAT HEAVY RAIN PRODUCING THUNDERSTORMS WERE DISSIPATING.

RADAR ESTIMATED 3 TO 4 INCHES OF RAINFALL ACROSS THE AREA FROM SKULL 
VALLEY TO IRON SPRINGS. WASHES ARE LIKELY STILL FLOWING STRONGLY 
ALONG WITH PONDING OF WATER ON ROADWAYS. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF COUNTRY 
ROADS...AS WELL AS NORMALLY DRY WASHES.

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.

&&

LAT...LON 3450 11274 3458 11275 3461 11266 3462 11257
      3454 11256 3450 11259 3448 11263 3447 11266
      3449 11272

$$

MCCOLLUM

314 
WGUS75 KFGZ 230115
FFSFGZ

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
615 PM MST WED AUG 22 2012

AZC025-230119-
/O.EXP.KFGZ.FF.W.0028.000000T0000Z-120823T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
YAVAPAI AZ-
615 PM MST WED AUG 22 2012

...THE FLASH FLOOD WARNING WILL EXPIRE AT 615 PM MST FOR CENTRAL
YAVAPAI COUNTY...

HEAVY RAIN PRODUCING THUNDERSTORMS HAVE DISSIPATED ACROSS THE AREA 
OF SKULL VALLEY AND IRON SPRINGS. WASHES WILL CONTINUE TO FLOW FOR 
THE NEXT FEW HOURS...SLOWLY SUBSIDING. THE THREAT FOR SIGNIFICANT 
FLOODING HAS ENDED FOR NOW. 

A FLASH FLOOD WATCH REMAINS IN EFFECT THROUGH THURSDAY AFTERNOON. 

LAT...LON 3450 11274 3458 11275 3461 11266 3462 11257
      3454 11256 3450 11259 3448 11263 3447 11266
      3449 11272

$$

MCCOLLUM

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 21, 5:04 PM MST	Areal Flood Advisory	FGZ	Apache, Navajo	3 hr
Aug 22, 1:17 AM MST	Flash Flood Warning	FGZ	Coconino	9 hr
Aug 22, 3:02 AM MST	Flash Flood Watch	FGZ	Apache, Coconino, Gila, Navajo, Yavapai	28 hr
Aug 22, 9:53 AM MST	Areal Flood Advisory	FGZ	Coconino	12 hr
Aug 22, 1:16 PM MST	Areal Flood Advisory	FGZ	Apache	104 min
Aug 22, 3:20 PM MST	Areal Flood Advisory	FGZ	Yavapai	85 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.