Alert archive / Arizona / Flash Flood Warnings in 2011

Flash Flood Warning 37, NWS Tucson, AZ

August 8, 2011Cochise County, Arizona

NWS Tucson, AZ issued this flash flood warning at Aug 8, 2011, 2:31 PM MST for Cochise County, Arizona. It was in force for 119 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 8, 2011, 2:31 PM MST (21:31 UTC)
Expired
Aug 8, 2011, 4:30 PM MST
In force
119 min
Issued by
NWS Tucson, AZ
Area
Storm-based polygon
Flood severity
None

County Cochise County, AZ

The radar

The Tucson radar (KEMX), 66 km from the middle of the area, began a volume at 21:32 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, 9.5 hours before the alert went out and 105 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-pSkew-T log-p diagram, Tuscon, AZ at 12:00Z on 2011-08-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 781 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tuscon, AZ at 12:00Z on 2011-08-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -20 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
781 J/kg
Mixed-layer CIN
-160 J/kg
Mixed-layer LCL
1249 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
-20 m²/s²
0-3 km storm-relative helicity
110 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.

960 
WGUS55 KTWC 082131
FFWTWC
AZC003-082330-
/O.NEW.KTWC.FF.W.0037.110808T2131Z-110808T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
231 PM MST MON AUG 8 2011

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

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

* UNTIL 430 PM MST

* AT 225 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A STRONG THUNDERSTORM GENERATING HEAVY RAIN OVER MILLER CANYON...
  HUNTER CANYON AND STUMP CANYON SOUTH OF SIERRA VISTA. HEAVY
  RAINFALL OVER PORTIONS OF THE BURN ARE IS EXPECTED TO GENERATE
  FLASH FLOODING.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF WASHES
AND STREAMS...URBAN AREAS...AND ROADS AS WELL AS OTHER DRAINAGE
AREAS AND LOW LYING SPOTS.

&&

LAT...LON 3133 11041 3148 11045 3152 11017 3133 11011
      3132 11015 3132 11039

$$

MEYER
2 follow-up statements
058 
WGUS75 KTWC 082243
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
343 PM MST MON AUG 8 2011

AZC003-082330-
/O.CON.KTWC.FF.W.0037.000000T0000Z-110808T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COCHISE AZ-
343 PM MST MON AUG 8 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 430 PM MST FOR
SOUTHWESTERN COCHISE COUNTY...

AT 336 PM MST...ALTHOUGH THE BULK OF THE THUNDERSTORMS HAVE MOVED 
SOUTH OF THE INTERNATIONAL BORDER AND AWAY FROM THE MONUMENT FIRE 
BURN AREA...THE HEAVY RAINFALL THAT FELL WILL CONTINUE TO RESULT IN 
FLASH FLOODING. 

THE HEAVIEST RAINFALL WAS OVER MILLER CANYON...HUNTER CANYON AND STUMP 
CANYON SOUTH OF SIERRA VISTA. 

LAT...LON 3133 11041 3148 11045 3152 11017 3133 11011
      3132 11015 3132 11039

$$
736 
WGUS75 KTWC 082325
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
425 PM MST MON AUG 8 2011

AZC003-082332-
/O.EXP.KTWC.FF.W.0037.000000T0000Z-110808T2330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COCHISE AZ-
425 PM MST MON AUG 8 2011

...THE FLASH FLOOD WARNING WILL EXPIRE AT 430 PM MST FOR SOUTHWESTERN
COCHISE COUNTY...

THE HEAVY RAINFALL THAT FELL OVER MILLER CANYON...HUNTER CANYON AND 
STUMP CANYON SOUTH OF SIERRA VISTA...HAS HAD AMPLE TIME TO DRAIN 
INTO CREEKS...AND THE THREAT OF FLASH FLOODING HAS SUBSIDED. 
THEREFORE...THE FLASH FLOOD WARNING HAS BEEN ALLOWED TO EXPIRE AT 
430 PM MST.

LAT...LON 3133 11041 3148 11045 3152 11017 3133 11011
      3132 11015 3132 11039

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 7, 5:04 PM MSTSevere Thunderstorm WarningTWCPima41 min
Aug 7, 5:05 PM MSTFlash Flood WarningTWCPima115 min
Aug 7, 5:44 PM MSTSevere Thunderstorm WarningTWCPima16 min
Aug 7, 6:29 PM MSTAreal Flood AdvisoryTWCPima91 min

Nearby

Flash Flood Warnings in Arizona, 2011Every 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.