Alert archive / Arizona / Flash Flood Warnings in 2014

Flash Flood Warning 13, NWS Flagstaff, AZ

August 19, 2014Yavapai County, Arizona

NWS Flagstaff, AZ issued this flash flood warning at Aug 19, 2014, 9:07 AM MST for Yavapai County, Arizona. It was in force for 113 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 19, 2014, 9:07 AM MST (16:07 UTC)
Expired: Aug 19, 2014, 11:00 AM MST
In force: 113 min
Issued by: NWS Flagstaff, AZ
Area: Storm-based polygon
Flood severity: None

County Yavapai County, AZ

The radar

The Phoenix radar (KIWA), 97 km from the middle of the area, began a volume at 16:07 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, 4.1 hours before the alert went out and 72 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.

940 
WGUS55 KFGZ 191607
FFWFGZ
AZC025-191800-
/O.NEW.KFGZ.FF.W.0013.140819T1607Z-140819T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
907 AM MST TUE AUG 19 2014

THE NATIONAL WEATHER SERVICE IN FLAGSTAFF HAS ISSUED A

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

* UNTIL 1100 AM MST

* AT 901 AM MST...THE GAGE ON THE AGUA FRIA RIVER AT ROCK SPRINGS 
SHOWED AT JUMP WITH FLOW AT 10000 CFS. 

* LOCATIONS IN THE WARNING INCLUDE THE AGUA FRIA RIVER FROM ROCK 
SPRINGS DOWNSTREAM TO LAKE PLEASANT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS INCLUDES THE FOLLOWING STREAMS AND DRAINAGES...
AGUA FRIA RIVER...LITTLE SQUAW CREEK...SLATE CREEK...BLACK CANYON 
CREEK AND BLACK CANYON.

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. MOVE TO HIGHER GROUND.

&&

LAT...LON 3412 11216 3413 11209 3404 11212 3403 11214
      3404 11215 3402 11215 3400 11219 3406 11222

$$
41

1 follow-up statement

469 
WGUS75 KFGZ 191636
FFSFGZ

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
936 AM MST TUE AUG 19 2014

AZC025-191800-
/O.CON.KFGZ.FF.W.0013.000000T0000Z-140819T1800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
YAVAPAI AZ-
936 AM MST TUE AUG 19 2014

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1100 AM MST FOR
SOUTH CENTRAL YAVAPAI COUNTY...

AT 925 AM MST...THE GAGE ON THE AGUA FRIA RIVER AT ROCK SPRINGS 
MEASURED THE AT 16000 CUBIC FEET PER SECOND. RADAR SHOWS 
THUNDERSTORMS TO CONTINUE OVER THE AREA THROUGH AT LEAST 1000 AM 
MST.   

LOCATIONS IN THE WARNING INCLUDE THE AGUA FRIA RIVER FROM ROCK 
SPRINGS DOWNSTREAM TO LAKE PLEASANT. 

THIS INCLUDES THE FOLLOWING STREAMS AND DRAINAGES...
AGUA FRIA RIVER...LITTLE SQUAW CREEK...SLATE CREEK...BLACK CANYON 
CREEK AND BLACK CANYON.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF CREEKS 
AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE BANKS OF 
CREEKS AND STREAMS. LOW WATER CROSSING WILL BE HAZARDOUS.

&&

LAT...LON 3412 11216 3413 11209 3404 11212 3403 11214
      3404 11215 3402 11215 3400 11219 3406 11222

$$

41

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 19, 6:16 AM MST	Areal Flood Advisory	FGZ	Yavapai	4 hr
Aug 19, 7:34 AM MST	Areal Flood Advisory	FGZ	Coconino, Gila, Yavapai	3 hr
Aug 19, 10:33 AM MST	Areal Flood Warning	FGZ	Yavapai	10 hr
Aug 19, 12:24 PM MST	Areal Flood Advisory	FGZ	Coconino	3 hr
Aug 19, 1:22 PM MST	Areal Flood Advisory	FGZ	Yavapai	4 hr
Aug 19, 1:24 PM MST	Flash Flood Warning	FGZ	Yavapai	111 min
Aug 19, 1:59 PM MST	Flash Flood Warning	FGZ	Yavapai	2 hr

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.