Alert archive / Arizona / Flash Flood Warnings in 2011

Flash Flood Warning 69, NWS Tucson, AZ

September 13, 2011Cochise County, Arizona

NWS Tucson, AZ issued this flash flood warning at Sep 13, 2011, 6:59 PM MST for Cochise County, Arizona. It was in force for 91 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: Sep 13, 2011, 6:59 PM MST (01:59 UTC)
Expired: Sep 13, 2011, 8:30 PM MST
In force: 91 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Flood severity: None

County Cochise County, AZ

The radar

The Tucson radar (KEMX), 57 km from the middle of the area, began a volume at 02:01 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

Tuscon, AZ (KTUS), launched 00:00Z, 2.0 hours before the alert went out and 96 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: 2 J/kg
Mixed-layer CIN: -92 J/kg
Mixed-layer LCL: 2430 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 19 m²/s²
0-3 km storm-relative helicity: 74 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.

127 
WGUS55 KTWC 140159
FFWTWC
AZC003-140330-
/O.NEW.KTWC.FF.W.0069.110914T0159Z-110914T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
659 PM MST TUE SEP 13 2011

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHWESTERN COCHISE COUNTY IN SOUTHEAST ARIZONA...

* UNTIL 830 PM MST

* AT 653 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THUNDERSTORMS CONTINUING TO BUILD AND MOVE OVER THE MONUMENT FIRE 
  BURN AREA. STORMS FROM MEXICO ARE EXPECTED TO CONTINUE TO MOVE
  OVER THIS AREA THROUGH THE NEXT HOUR. RADAR RAINFALL ESTIMATES
  FROM THIS AREA INDICATE THAT UP TO ONE-HALF OF RAINFALL HAS 
  ALREADY FALLEN IN THIS AREA...WITH A RAINFALL GAUGE IN THE BURN 
  AREA INDICATING 0.39 INCHES.    

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO RAMSEY
  CANYON PRESERVE AND NICKSVILLE

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF WASHES
AND STREAMS...COUNTRY ROADS...AS WELL AS FARMLAND ALONG THE BANKS OF
CREEKS AND STREAMS.

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 3151 11044 3152 11029 3147 11021 3134 11022
      3134 11045

$$
ZELL

3 follow-up statements

408 
WGUS75 KTWC 140244
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
744 PM MST TUE SEP 13 2011

AZC003-140330-
/O.CON.KTWC.FF.W.0069.000000T0000Z-110914T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COCHISE AZ-
744 PM MST TUE SEP 13 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 830 PM MST FOR
SOUTHWESTERN COCHISE COUNTY...

AT 742 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE AN AREA OF THUNDERSTORMS PRODUCING HEAVY RAINFALL OVER 
SOUTHWEST COCHISE COUNTY...ESPECIALLY THE MONUMENT FIRE BURN AREA. 
RADAR RAINFALL ESTIMATES INDICATE THAT BETWEEN ONE INCH AND ONE AND 
A HALF INCHES OF RAIN HAD FALLEN IN THE BURN AREA. A NWS SPOTTER ON 
THE EASTERN EDGE OF THE HEAVY RAINFALL...NEAR HEREFORD...REPORTED 
0.70 INCHES OF RAINFALL IN 30 MINUTES. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO RAMSEY CANYON
PRESERVE AND NICKSVILLE

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

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 3151 11044 3152 11029 3147 11021 3134 11022
      3134 11045

$$
ZELL

633 
WGUS75 KTWC 140307
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
807 PM MST TUE SEP 13 2011

AZC003-140330-
/O.CON.KTWC.FF.W.0069.000000T0000Z-110914T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COCHISE AZ-
807 PM MST TUE SEP 13 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 830 PM MST FOR
SOUTHWESTERN COCHISE COUNTY...

AT 757 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE AN AREA OF SHOWERS OVER SOUTHWESTERN COCHISE COUNTY IN THE  
MONUMENT FIRE BURN AREA. RADAR RAINFALL ESTIMATES INDICATE THAT UP 
TO ONE AND A HALF INCHES OF RAIN HAD FALLEN IN THE BURN AREA IN THE 
LAST HOUR. RAINFALL GAUGES FROM THIS AREA SHOW THAT 1.02 INCHES OF 
RAIN OCCURRED IN MILLER CANYON...WITH 0.71 INCHES OF RAIN IN CARR 
CANYON. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO RAMSEY CANYON
PRESERVE AND NICKSVILLE

LAT...LON 3151 11044 3152 11029 3147 11021 3134 11022
      3134 11045

$$
ZELL

924 
WGUS75 KTWC 140334
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
834 PM MST TUE SEP 13 2011

AZC003-140341-
/O.EXP.KTWC.FF.W.0069.000000T0000Z-110914T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COCHISE AZ-
834 PM MST TUE SEP 13 2011

...THE FLASH FLOOD WARNING HAS EXPIRED FOR SOUTHWESTERN COCHISE
COUNTY...

AT 830 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THAT THE RAIN HAD COME TO AN END OVER SOUTHWESTERN COCHISE COUNTY 
AND THE MONUMENT FIRE BURN AREA. THEREFORE...THE FLASH FLOOD WARNING 
HAS BEEN ALLOWED TO EXPIRE. 

LAT...LON 3151 11044 3152 11029 3147 11021 3134 11022
      3134 11045

$$
ZELL

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 13, 5:14 PM MST	Areal Flood Advisory	TWC	Cochise	91 min
Sep 13, 5:48 PM MST	Dust Storm Warning	TWC	Pinal	12 min
Sep 13, 6:49 PM MST	Areal Flood Advisory	TWC	Pima	116 min
Sep 13, 7:34 PM MST	Areal Flood Advisory	TWC	Cochise, Graham, Greenlee, Pima, Pinal, Santa Cruz	3 hr
Sep 14, 11:30 AM MST	Special Weather Statement	TWC	Santa Cruz	45 min
Sep 14, 12:16 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Pima	59 min
Sep 14, 1:15 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Graham	60 min
Sep 14, 1:27 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Pima, Santa Cruz	48 min
Sep 14, 1:54 PM MST	Severe Thunderstorm Warning	TWC	Pima	23 min
Sep 14, 2:15 PM MST	Severe Thunderstorm Warning	TWC	Graham	60 min
Sep 14, 4:18 PM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	27 min
Sep 14, 4:36 PM MST	Flash Flood Warning	TWC	Cochise, Pima	114 min
Sep 14, 4:43 PM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	47 min
Sep 14, 4:52 PM MST	Severe Thunderstorm Warning	TWC	Pima	23 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.