Alert archive / Arizona / Flash Flood Warnings in 2011

Flash Flood Warning 7, NWS Tucson, AZ

July 7, 2011Cochise County, Arizona

NWS Tucson, AZ issued this flash flood warning at Jul 7, 2011, 3:16 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: Jul 7, 2011, 3:16 PM MST (22:16 UTC)
Expired: Jul 7, 2011, 5:15 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), 64 km from the middle of the area, began a volume at 22:16 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, 10.3 hours before the alert went out and 103 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: 1092 J/kg
Mixed-layer CIN: -113 J/kg
Mixed-layer LCL: 1204 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 24 m²/s²
0-3 km storm-relative helicity: 120 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

211 
WGUS55 KTWC 072216
FFWTWC
AZC003-080015-
/O.NEW.KTWC.FF.W.0007.110707T2216Z-110708T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
316 PM MST THU JUL 7 2011

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

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

* UNTIL 515 PM MST

* AT 306 PM MST...A STRONG THUNDERSTORM WAS GENERATING HEAVY RAINFALL
  NEAR AND OVER THE BURN AREA IN SOUTHWESTERN COCHISE COUNTY...
  INCLUDING MILLER CANYON. RAINFALL AMOUNTS IN EXCESS OF 1 INCH
  ARE EXPECTED WITH THIS STORM.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF WASHES
AND STREAMS...CANYONS AND ROADS.

&&

LAT...LON 3133 11045 3151 11044 3150 11016 3133 11017
      3132 11024 3132 11043

$$

MEYER

3 follow-up statements

200 
WGUS75 KTWC 072244
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
344 PM MST THU JUL 7 2011

AZC003-080015-
/O.CON.KTWC.FF.W.0007.000000T0000Z-110708T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COCHISE AZ-
344 PM MST THU JUL 7 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 515 PM MST FOR
SOUTHWESTERN COCHISE COUNTY...

AT 336 PM MST...A THUNDERSTORM CONTINUED TO GENERATE HEAVY RAINFALL 
NEAR AND OVER THE BURN AREA IN SOUTHWESTERN COCHISE COUNTY...  
INCLUDING ASH AND MILLER CANYONS. STORM TOTAL RAINFALL AMOUNTS IN 
EXCESS OF 1 INCH ARE EXPECTED WITH THIS STORM. RADAR ESTIMATES WERE 
APPROACHING 2 INCHES NEAR AND SOUTH OF ASH CANYON.

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF WASHES 
AND STREAMS...CANYONS AND ROADS. IN ADDITION...SIGNIFICANT DEBRIS 
FLOW IS POSSIBLE.

&&

LAT...LON 3133 11045 3151 11044 3150 11016 3133 11017
      3132 11024 3132 11043

$$

MEYER

576 
WGUS75 KTWC 072308
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
408 PM MST THU JUL 7 2011

AZC003-080015-
/O.CON.KTWC.FF.W.0007.000000T0000Z-110708T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COCHISE AZ-
408 PM MST THU JUL 7 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 515 PM MST FOR
SOUTHWESTERN COCHISE COUNTY...

AT 405 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED 
THUNDERSTORMS WERE WEAKENING ACROSS MOST OF SOUTHWESTERN COCHISE 
COUNTY. LITTLE ADDITIONAL RAINFALL IS EXPECTED OVER THE BURN 
AREA...HOWEVER HEAVY RUNOFF WILL CONTINUE FROM EARLIER RAINFALL 
AMOUNTS BETWEEN 3/4 AND 2 INCHES...INCLUDING THE ASH AND MILLER 
CANYON AREAS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF WASHES 
AND STREAMS...CANYONS AND ROADS. IN ADDITION...SIGNIFICANT DEBRIS 
FLOW IS POSSIBLE.

&&

LAT...LON 3133 11045 3151 11044 3150 11016 3133 11017
      3132 11024 3132 11043

$$

MEYER

518 
WGUS75 KTWC 080009
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
509 PM MST THU JUL 7 2011

AZC003-080018-
/O.EXP.KTWC.FF.W.0007.000000T0000Z-110708T0015Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COCHISE AZ-
509 PM MST THU JUL 7 2011

...THE FLASH FLOOD WARNING WILL EXPIRE AT 515 PM MST FOR SOUTHWESTERN
COCHISE COUNTY...

AT 505 PM MST SHOWERS HAD LONG SINCE ENDED OVER THE BURN AREA SOUTH
OF SIERRA VISTA...SOME RUNOFF WILL CONTINUE...BUT THE MAIN THREAT 
FOR FLASH FLOODING SHOULD HAVE PASSED.

LAT...LON 3133 11045 3151 11044 3150 11016 3133 11017
      3132 11024 3132 11043

$$

MEYER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 5:06 PM MST	Severe Thunderstorm Warning	TWC	Graham	39 min
Jul 6, 5:07 PM MST	Areal Flood Advisory	TWC	Cochise, Pima	3 hr
Jul 6, 5:19 PM MST	Severe Thunderstorm Warning	TWC	Cochise	41 min
Jul 6, 5:58 PM MST	Flash Flood Warning	TWC	Pima	2 hr
Jul 7, 2:36 PM MST	Special Weather Statement	TWC	Cochise	24 min
Jul 7, 2:40 PM MST	Severe Thunderstorm Warning	TWC	Cochise	50 min
Jul 7, 3:34 PM MST	Areal Flood Advisory	TWC	Cochise	3 hr
Jul 7, 3:54 PM MST	Severe Thunderstorm Warning	TWC	Cochise	51 min
Jul 7, 4:20 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Pima	40 min
Jul 7, 4:42 PM MST	Severe Thunderstorm Warning	TWC	Pima, Santa Cruz	48 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.