Alert archive / Arizona / Flash Flood Warnings in 2011

Flash Flood Warning 23, NWS Tucson, AZ

July 24, 2011Cochise County, Arizona

NWS Tucson, AZ issued this flash flood warning at Jul 24, 2011, 4:38 PM MST for Cochise County, Arizona. It was in force for 112 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 24, 2011, 4:38 PM MST (23:38 UTC)
Expired: Jul 24, 2011, 6:30 PM MST
In force: 112 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 23:38 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, 11.6 hours before the alert went out and 71 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: 362 J/kg
Mixed-layer CIN: -125 J/kg
Mixed-layer LCL: 1054 m above ground
0-6 km bulk shear: 1 kt
0-1 km storm-relative helicity: 23 m²/s²
0-3 km storm-relative helicity: 93 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.

025 
WGUS55 KTWC 242338
FFWTWC
AZC003-250130-
/O.NEW.KTWC.FF.W.0023.110724T2338Z-110725T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
438 PM MST SUN JUL 24 2011

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

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

* UNTIL 630 PM MST

* AT 430 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
THUNDERSTORMS WITH VERY HEAVY RAINFALL FROM MULESHOE RANCH TO 
CASCABEL. RADAR ESTIMATES INDICATE THAT FROM 1.00 TO 2.00 INCHES OF 
RAINFALL HAS OCCURED DURING THE PAST HOUR. WASHES AND LOW WATER 
CROSSINGS WILL BE FLOODED...ESPECIALLY ALONG CASCABEL ROAD...THREE 
LINKS ROAD AND MULESHOE ROAD.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MULESHOE
  RANCH PRESERVE AND CASCABEL

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.

IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE
POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS
FLOODED ROADS. FIND ALTERNATE ROUTES. IT TAKES ONLY A FEW INCHES OF
SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY.

&&

LAT...LON 3242 11044 3242 10991 3236 10978 3219 10995
      3205 11044

$$

SHOEMAKER

2 follow-up statements

957 
WGUS75 KTWC 250039
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
539 PM MST SUN JUL 24 2011

AZC003-250130-
/O.CON.KTWC.FF.W.0023.000000T0000Z-110725T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COCHISE AZ-
539 PM MST SUN JUL 24 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 630 PM MST FOR
NORTHWESTERN COCHISE COUNTY...

AT 530 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE THUNDERSTORMS WITH VERY HEAVY RAINFALL FROM MULESHOE RANCH 
TO CASCABEL. RADAR ESTIMATES INDICATE THAT FROM 1.00 TO 3.00 INCHES 
OF RAINFALL HAS OCCURED OVER PAST 2 HOURS. WASHES AND LOW WATER 
CROSSINGS WILL BE FLOODED...ESPECIALLY ALONG CASCABEL ROAD...THREE 
LINKS ROAD AND MULESHOE ROAD.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO MULESHOE
RANCH PRESERVE AND CASCABEL

LAT...LON 3242 11044 3242 10991 3236 10978 3219 10995
      3205 11044

$$

SHOEMAKER

900 
WGUS75 KTWC 250121
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
621 PM MST SUN JUL 24 2011

AZC003-250131-
/O.EXP.KTWC.FF.W.0023.000000T0000Z-110725T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COCHISE AZ-
621 PM MST SUN JUL 24 2011

...THE FLASH FLOOD WARNING WILL EXPIRE AT 630 PM MST FOR NORTHWESTERN
COCHISE COUNTY...

THIS WARNING HAS BEEN REPLACED BY A SMALL STREAM FLOOD ADVISORY 
UNTIL 9 PM MST. NORMALLY DRY WASHES AND STREAMS WILL CONTINUE TO 
EXPERIENCE ELEVATED FLOWS FOR THE NEXT FEW HOURS. PONDING OF WATER 
IN LOW-LYING AREAS CAN ALSO BE EXPECTED. 

LAT...LON 3242 11044 3242 10991 3236 10978 3219 10995
      3205 11044

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 23, 5:39 PM MST	Severe Thunderstorm Warning	TWC	Pima	36 min
Jul 23, 5:41 PM MST	Severe Thunderstorm Warning	TWC	Pima	34 min
Jul 23, 7:09 PM MST	Severe Thunderstorm Warning	TWC	Pima	36 min
Jul 23, 9:23 PM MST	Areal Flood Advisory	TWC	Cochise	82 min
Jul 24, 5:41 AM MST	Areal Flood Advisory	TWC	Cochise, Pima, Santa Cruz	111 min
Jul 24, 6:36 AM MST	Flash Flood Watch	TWC	Cochise, Graham, Greenlee, Pima, Pinal, Santa Cruz	13 hr
Jul 24, 1:37 PM MST	Areal Flood Advisory	TWC	Cochise	3 hr
Jul 24, 2:10 PM MST	Flash Flood Warning	TWC	Greenlee	110 min
Jul 24, 4:05 PM MST	Severe Thunderstorm Warning	TWC	Graham	40 min
Jul 24, 4:15 PM MST	Flash Flood Warning	TWC	Graham	2 hr
Jul 24, 4:18 PM MST	Severe Thunderstorm Warning	TWC	Cochise	42 min
Jul 24, 4:25 PM MST	Flash Flood Warning	TWC	Cochise	3 hr

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.