Alert archive / Arizona / Flash Flood Warnings in 2011

Flash Flood Warning 63, NWS Tucson, AZ

September 10, 2011Cochise County, Arizona

NWS Tucson, AZ issued this flash flood warning at Sep 10, 2011, 4:46 PM MST for Cochise County, Arizona. It was in force for 89 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 10, 2011, 4:46 PM MST (23:46 UTC)
Expired: Sep 10, 2011, 6:15 PM MST
In force: 89 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Flood severity: None

County Cochise County, AZ

The radar

The Tucson radar (KEMX), 80 km from the middle of the area, began a volume at 23:49 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, 11.8 hours before the alert went out and 110 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: 306 J/kg
Mixed-layer CIN: -95 J/kg
Mixed-layer LCL: 1601 m above ground
0-6 km bulk shear: 56 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 206 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.3

Open this sounding in Storm Lab

The text

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

178 
WGUS55 KTWC 102346
FFWTWC
AZC003-110115-
/O.NEW.KTWC.FF.W.0063.110910T2346Z-110911T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
446 PM MST SAT SEP 10 2011

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

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

* UNTIL 615 PM MST

* AT 442 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  AN AREA OF STRONG THUNDERSTORMS PRODUCING HEAVY RAINFALL NEAR AND 
  TO THE WEST OF SUNIZONA. RADAR RAINFALL ESTIMATES FROM THIS AREA 
  WERE BETWEEN 1.5 AND 2 INCHES.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SUNIZONA
  AND PEARCE-SUNSITES

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 3196 10984 3197 10962 3187 10957 3170 10972
      3172 10990 3186 11002

$$
ZELL

2 follow-up statements

579 
WGUS75 KTWC 110009
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
509 PM MST SAT SEP 10 2011

AZC003-110115-
/O.CON.KTWC.FF.W.0063.000000T0000Z-110911T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COCHISE AZ-
509 PM MST SAT SEP 10 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 615 PM MST FOR
CENTRAL COCHISE COUNTY...

AT 505 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE AN OF THUNDERSTORMS PRODUCING VERY HEAVY RAIN BETWEEN 
SUNIZONA AND ELFRIDA. ADDITIONAL STORMS TO THE WEST OF THIS AREA 
WILL MOVE BACK ACROSS WHERE HEAVY RAIN HAS ALREADY OCCURRED. 
ADDITIONAL ROADS WHERE THE HEAVY RAIN OCCURRED INCLUDE W COURTLAND 
ROAD AND GHOST TOWN TRAIL. RADAR ESTIMATES IN THIS AREA INDICATE 
THAT BETWEEN 2.0 AND 2.5 INCHES OF RAINFALL HAS OCCURRED.    

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SUNIZONA AND
PEARCE-SUNSITES

PRECAUTIONARY/PREPAREDNESS ACTIONS...

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS 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. MOVE TO HIGHER GROUND.

&&

LAT...LON 3196 10984 3197 10962 3187 10957 3170 10972
      3172 10990 3186 11002

$$
ZELL

192 
WGUS75 KTWC 110113
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
613 PM MST SAT SEP 10 2011

AZC003-110121-
/O.EXP.KTWC.FF.W.0063.000000T0000Z-110911T0115Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COCHISE AZ-
613 PM MST SAT SEP 10 2011

...THE FLASH FLOOD WARNING WILL EXPIRE AT 615 PM MST FOR CENTRAL
COCHISE COUNTY...

AT 612 PM MST...NATIONAL WEATHER SERVICE RADAR CONTINUED TO SHOW 
STRONG THUNDERSTORMS PRODUCING HEAVY RAIN IN CENTRAL COCHISE 
COUNTY. 

ALTHOUGH THIS WARNING WILL EXPIRE IT IS BEING REPLACED AND THE AREA 
EXPANDED WITH ANOTHER WARNING THAT WILL EXPIRE AT 730 PM MST. 

LAT...LON 3196 10984 3197 10962 3187 10957 3170 10972
      3172 10990 3186 11002

$$
ZELL

The office that day

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

Issued	Product	Office	Counties	Lasted
Sep 9, 5:08 PM MST	Severe Thunderstorm Warning	TWC	Pima	37 min
Sep 9, 5:40 PM MST	Flash Flood Warning	TWC	Pima	80 min
Sep 9, 5:40 PM MST	Severe Thunderstorm Warning	TWC	Pima	65 min
Sep 9, 6:09 PM MST	Severe Thunderstorm Warning	TWC	Cochise	66 min
Sep 9, 6:14 PM MST	Special Weather Statement	TWC		46 min
Sep 9, 6:56 PM MST	Special Weather Statement	TWC		49 min
Sep 9, 7:02 PM MST	Flash Flood Warning	TWC	Pima	88 min
Sep 9, 7:21 PM MST	Severe Thunderstorm Warning	TWC	Santa Cruz	39 min
Sep 9, 7:52 PM MST	Flash Flood Warning	TWC	Cochise, Santa Cruz	83 min
Sep 9, 8:31 PM MST	Areal Flood Advisory	TWC	Santa Cruz	74 min
Sep 9, 9:17 PM MST	Flash Flood Warning	TWC	Cochise	58 min
Sep 10, 1:44 PM MST	Special Weather Statement	TWC	Pinal	46 min
Sep 10, 2:23 PM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	37 min
Sep 10, 2:49 PM MST	Special Weather Statement	TWC	Cochise	41 min
Sep 10, 2:55 PM MST	Severe Thunderstorm Warning	TWC	Pinal	50 min
Sep 10, 3:00 PM MST	Severe Thunderstorm Warning	TWC	Cochise	45 min
Sep 10, 3:10 PM MST	Tornado Warning	TWC	Pinal	20 min
Sep 10, 3:23 PM MST	Severe Thunderstorm Warning	TWC	Cochise	52 min
Sep 10, 3:29 PM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	37 min
Sep 10, 3:39 PM MST	Flash Flood Warning	TWC	Pinal	111 min
Sep 10, 3:45 PM MST	Severe Thunderstorm Warning	TWC	Cochise	45 min
Sep 10, 3:51 PM MST	Areal Flood Advisory	TWC	Cochise	84 min
Sep 10, 3:51 PM MST	Severe Thunderstorm Warning	TWC	Graham, Pinal	39 min
Sep 10, 4:06 PM MST	Flash Flood Warning	TWC	Cochise	114 min
Sep 10, 4:12 PM MST	Severe Thunderstorm Warning	TWC	Cochise	48 min
Sep 10, 4:18 PM MST	Special Weather Statement	TWC	Pima	42 min
Sep 10, 4:26 PM MST	Severe Thunderstorm Warning	TWC	Graham, Pinal	64 min
Sep 10, 4:29 PM MST	Areal Flood Advisory	TWC	Pima	2 hr
Sep 10, 4:48 PM MST	Special Weather Statement	TWC		42 min
Sep 10, 4:55 PM MST	Severe Thunderstorm Warning	TWC	Pima, Pinal	50 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.