Alert archive / Arizona / Flash Flood Warnings in 2012

Flash Flood Warning 6, NWS Flagstaff, AZ

July 15, 2012Navajo County, Arizona

NWS Flagstaff, AZ issued this flash flood warning at Jul 15, 2012, 6:58 PM MDT for Navajo County, Arizona. It was in force for 51 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: Jul 15, 2012, 6:58 PM MDT (00:58 UTC)
Expired: Jul 15, 2012, 7:49 PM MDT
In force: 51 min
Issued by: NWS Flagstaff, AZ
Area: Storm-based polygon
Flood severity: None

County Navajo County, AZ

The radar

The Flagstaff radar (KFSX), 138 km from the middle of the area, began a volume at 01:01 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 00:00Z, 1.0 hours before the alert went out and 191 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: 683 J/kg
Mixed-layer CIN: -58 J/kg
Mixed-layer LCL: 2031 m above ground
0-6 km bulk shear: 9 kt
0-1 km storm-relative helicity: 13 m²/s²
0-3 km storm-relative helicity: 20 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.

758 
WGUS55 KFGZ 160058
FFWFGZ
AZC017-160230-
/O.NEW.KFGZ.FF.W.0006.120716T0058Z-120716T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
558 PM MST SUN JUL 15 2012

THE NATIONAL WEATHER SERVICE IN FLAGSTAFF HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EXTREME SOUTHEASTERN NAVAJO COUNTY IN NORTHEAST ARIZONA...

* UNTIL 730 PM MST

* AT 552 PM MST...RADAR INDICATED A LINE OF HEAVY THUNDERSTORMS
  MOVING INTO THE LOCUST FIRE BURN AREA IN THE COMMUNITY OF
  WHITERIVER. RAINFALL AMOUNTS AROUND AN INCH ARE LIKELY BY 630
  PM MST AND WILL LIKELY TRIGGER FLASH FLOODING.

* THE STORM PRODUCING FLASH FLOODING WILL OTHERWISE REMAIN OVER
  MAINLY RURAL AREAS OF THE INDICATED COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

HEAVY RAIN IS MOVING TOWARD THE LOCUST FIRE BURN AREA...HOWEVER IT
HAS NOT YET DEVELOPED OVER THE BURN AREA AT THIS TIME. HEAVY RAIN
WILL LIKELY TRIGGER LIFE-THREATENING FLASH FLOODS AND DEBRIS FLOWS
WITHIN AND DOWNHILL FROM THE LOCUST FIRE BURN AREA SHORTLY AFTER IT
BEGINS. IF YOU CAN NOT MOVE SAFELY OUT OF THE WAY OF FLASH FLOODING
BEFORE IT BEGINS...IT WOULD BE BEST TO SHELTER IN PLACE IN A STURDY
STRUCTURE.

AREAS IMPACTED BY THIS WARNING INCLUDE THOSE LOCATIONS IN WHITERIVER
FROM LOCUST STREET TO KNOTS LANDING ROAD BETWEEN THE BURN AREA AND
THE WHITE RIVER...INCLUDING HIGHWAY 73.

&&

LAT...LON 3387 10998 3387 10996 3384 10996 3384 10998

$$

DJO

2 follow-up statements

535 
WGUS55 KFGZ 160105 CCA
FFWFGZ
AZC017-160230-
/O.COR.KFGZ.FF.W.0006.120716T0058Z-120716T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING...CORRECTED
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
558 PM MST SUN JUL 15 2012

THE NATIONAL WEATHER SERVICE IN FLAGSTAFF HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EXTREME SOUTHEASTERN NAVAJO COUNTY IN NORTHEAST ARIZONA...

* UNTIL 730 PM MST

* AT 552 PM MST...RADAR INDICATED A LINE OF HEAVY THUNDERSTORMS
  MOVING INTO THE LOCUST FIRE BURN AREA IN THE COMMUNITY OF
  WHITERIVER. RAINFALL AMOUNTS AROUND AN INCH ARE LIKELY BY 630
  PM MST AND WILL LIKELY TRIGGER FLASH FLOODING.

* THE STORM PRODUCING FLASH FLOODING WILL AFFECT THE COMMUNITY
  OF WHITERIVER

PRECAUTIONARY/PREPAREDNESS ACTIONS...

HEAVY RAIN IS MOVING TOWARD THE LOCUST FIRE BURN AREA...HOWEVER IT
HAS NOT YET DEVELOPED OVER THE BURN AREA AT THIS TIME. HEAVY RAIN
WILL LIKELY TRIGGER LIFE-THREATENING FLASH FLOODS AND DEBRIS FLOWS
WITHIN AND DOWNHILL FROM THE LOCUST FIRE BURN AREA SHORTLY AFTER IT
BEGINS. IF YOU CAN NOT MOVE SAFELY OUT OF THE WAY OF FLASH FLOODING
BEFORE IT BEGINS...IT WOULD BE BEST TO SHELTER IN PLACE IN A STURDY
STRUCTURE.

AREAS IMPACTED BY THIS WARNING INCLUDE THOSE LOCATIONS IN WHITERIVER
FROM LOCUST STREET TO KNOTS LANDING ROAD BETWEEN THE BURN AREA AND
THE WHITE RIVER...INCLUDING HIGHWAY 73.

&&

LAT...LON 3387 10998 3387 10996 3384 10996 3384 10998

$$

DJO

487 
WGUS75 KFGZ 160149
FFSFGZ

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
649 PM MST SUN JUL 15 2012

AZC017-160158-
/O.CAN.KFGZ.FF.W.0006.000000T0000Z-120716T0230Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
NAVAJO AZ-
649 PM MST SUN JUL 15 2012

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR EXTREME
SOUTHEASTERN NAVAJO COUNTY...

THE LINE OF HEAVY THUNDERSTORMS WHICH WAS HEADING FOR
THE LOCUST FIRE BURN AREA DID NOT MOVE EAST FAR ENOUGH TO
PRODUCE HEAVY RAIN ON THE BURN AREA. FLOODING IS NO LONGER
IMMINENT THEREFORE THE FLASH FLOOD WARNING HAS BEEN CANCELED.
ANOTHER WEAK THUNDERSTORM IS HEADING TOWARD THE BURN AREA...AND
MAY PRODUCE MINOR RUNOFF BETWEEN 700 PM AND 800 PM MST...BUT
SIGNIFICANT FLOODING IS NOT EXPECTED.

LAT...LON 3387 10998 3387 10996 3384 10996 3384 10998

$$

DJO

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 15, 6:01 PM MDT	Areal Flood Advisory	FGZ	Coconino, Navajo	119 min
Jul 15, 6:35 PM MDT	Areal Flood Advisory	FGZ	Gila, Navajo	3 hr
Jul 15, 6:43 PM MDT	Severe Thunderstorm Warning	FGZ	Yavapai	20 min
Jul 15, 7:07 PM MDT	Severe Thunderstorm Warning	FGZ	Coconino, Yavapai	23 min
Jul 15, 7:29 PM MDT	Severe Thunderstorm Warning	FGZ	Coconino, Yavapai	16 min
Jul 15, 10:46 PM MDT	Severe Thunderstorm Warning	FGZ	Coconino, Gila	14 min
Jul 15, 11:29 PM MDT	Areal Flood Advisory	FGZ	Coconino	90 min
Jul 16, 12:29 AM MDT	Areal Flood Advisory	FGZ	Coconino, Gila, Yavapai	2 hr
Jul 16, 1:30 AM MDT	Areal Flood Advisory	FGZ	Yavapai	87 min
Jul 16, 1:51 AM MDT	Areal Flood Advisory	FGZ	Coconino, Yavapai	54 min
Jul 16, 12:52 PM MDT	Severe Thunderstorm Warning	FGZ	Coconino	23 min
Jul 16, 2:31 PM MDT	Severe Thunderstorm Warning	FGZ	Coconino	29 min
Jul 16, 2:39 PM MDT	Tornado Warning	FGZ	Coconino	36 min
Jul 16, 3:15 PM MDT	Tornado Warning	FGZ	Coconino	16 min
Jul 16, 4:40 PM MDT	Severe Thunderstorm Warning	FGZ	Coconino	35 min
Jul 16, 4:49 PM MDT	Tornado Warning	FGZ	Coconino	26 min
Jul 16, 5:14 PM MDT	Tornado Warning	FGZ	Coconino	31 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.