Alert archive / Arizona / Flash Flood Warnings in 2011

Flash Flood Warning 39, NWS Flagstaff, AZ

September 2, 2011Apache County, Arizona

NWS Flagstaff, AZ issued this flash flood warning at Sep 2, 2011, 1:15 PM MST for Apache 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: Sep 2, 2011, 1:15 PM MST (20:15 UTC)
Expired: Sep 2, 2011, 4:15 PM MST
In force: 3 hr
Issued by: NWS Flagstaff, AZ
Area: Storm-based polygon
Flood severity: None

County Apache County, AZ

The radar

The Flagstaff radar (KFSX), 197 km from the middle of the area, began a volume at 20:15 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

Tuscon, AZ (KTUS), launched 12:00Z, 8.3 hours before the alert went out and 247 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: 17 J/kg
Mixed-layer CIN: -201 J/kg
Mixed-layer LCL: 2143 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 74 m²/s²
0-3 km storm-relative helicity: 202 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.

289 
WGUS55 KFGZ 022015
FFWFGZ
AZC001-022315-
/O.NEW.KFGZ.FF.W.0039.110902T2015Z-110902T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
115 PM MST FRI SEP 2 2011

THE NATIONAL WEATHER SERVICE IN FLAGSTAFF HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHEASTERN APACHE COUNTY IN NORTHEAST ARIZONA...

* UNTIL 415 PM MST

* AT 110 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
  AN AREA OF THUNDERSTORM PRODUCING HEAVY RAIN SOUTH OF NUTRIOSO AND 
  NORTH OF ALPINE. SOME OF THE HEAVY RAIN IS FALLING ON SEVERELY     
  BURNED FOREST. THIS INCLUDES PORTIONS OF HIGHWAY 180.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

&&

LAT...LON 3387 10929 3395 10929 3398 10920 3393 10912
      3383 10912 3383 10924

$$

MCCOLLUM

4 follow-up statements

981 
WGUS75 KFGZ 022044
FFSFGZ

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
144 PM MST FRI SEP 2 2011

AZC001-022315-
/O.CON.KFGZ.FF.W.0039.000000T0000Z-110902T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
APACHE AZ-
144 PM MST FRI SEP 2 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 415 PM MST FOR
SOUTHEASTERN APACHE COUNTY...

AT 138 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE AN AREA OF THUNDERSTORMS PRODUCING HEAVY RAIN AND FLASH 
FLOODING FROM ALPINE NORTHWARD TO A FEW MILES NORTH OF NUTRIOSO. 
THIS WARNING INDLUDES PORTIONS OF HIGHWAY 180.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

&&

LAT...LON 3387 10929 3395 10929 3398 10920 3393 10912
      3383 10912 3383 10924

$$

MCCOLLUM

674 
WGUS75 KFGZ 022057
FFSFGZ

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
157 PM MST FRI SEP 2 2011

AZC001-022315-
/O.CON.KFGZ.FF.W.0039.000000T0000Z-110902T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
APACHE AZ-
157 PM MST FRI SEP 2 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 415 PM MST FOR
SOUTHEASTERN APACHE COUNTY...

AT 152 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THAT THUNDERSTORMS WERE WEAKENING AND MOVING NORTH OF THE ALPINE AND 
NUTRIOSO AREA. HOWEVER...HEAVY RAIN FROM EARLIER WILL CONTINUE TO 
PRODUCE RUNOFF AND FLASH FLOODING ACROSS THE AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

FLOODING IS OCCURRING OR IS IMMINENT. MOST FLOOD RELATED DEATHS OCCUR
IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS WATER COVERED BRIDGES...
DIPS...OR LOW WATER CROSSINGS. NEVER TRY TO CROSS A FLOWING STREAM...
EVEN A SMALL ONE...ON FOOT.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

&&

LAT...LON 3387 10929 3395 10929 3398 10920 3393 10912
      3383 10912 3383 10924

$$

MCCOLLUM

807 
WGUS75 KFGZ 022156
FFSFGZ

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
256 PM MST FRI SEP 2 2011

AZC001-022315-
/O.CON.KFGZ.FF.W.0039.000000T0000Z-110902T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
APACHE AZ-
256 PM MST FRI SEP 2 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 415 PM MST FOR
SOUTHEASTERN APACHE COUNTY...

AT 253 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR SHOWED THAT 
ONLY LIGHT SHOWERS REMAINED OVER THE AREA OF ALPINE AND NUTRIOSO. 
HOWEVER...THE FLASH FLOOD WARNING REMAINS IN EFFECT AS HEAVY RUNOFF 
IN AREA STREAMS AND WASHES WILL CONTINUE FOR THE NEXT HOUR. 


PRECAUTIONARY/PREPAREDNESS ACTIONS...

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 3387 10929 3395 10929 3398 10920 3393 10912
      3383 10912 3383 10924

$$

MCCOLLUM

424 
WGUS75 KFGZ 022314
FFSFGZ

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE FLAGSTAFF AZ
414 PM MST FRI SEP 2 2011

AZC001-022318-
/O.EXP.KFGZ.FF.W.0039.000000T0000Z-110902T2315Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
APACHE AZ-
414 PM MST FRI SEP 2 2011

...THE FLASH FLOOD WARNING WILL EXPIRE AT 415 PM MST FOR SOUTHEASTERN
APACHE COUNTY...

AT 400 PM MST...NATIONAL WEATHER SERVICE RADAR INDICATED THAT HEAVY 
RAIN PRODUCING THUNDERSTORMS IN THE AREA OF ALPINE AND NUTRIOSO HAD 
DISSIPATED WELL OVER AN HOUR AGO. WHILE SOME RUNOFF LIKELY REMAINS IN 
AREA WASHES AND STREAMS THE THREAT FOR FLASH FLOODING HAS ENDED FOR 
NOW.

LAT...LON 3387 10929 3395 10929 3398 10920 3393 10912
      3383 10912 3383 10924

$$

MCCOLLUM

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 2, 12:56 PM MST	Areal Flood Advisory	FGZ	Apache	24 min

Nearby

Flash Flood Warnings in Arizona, 2011 Every flash flood warning in 2011

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.