Alert archive / Arizona / Flash Flood Warnings in 2011

Flash Flood Warning 25, NWS Tucson, AZ

July 25, 2011Cochise County, Arizona

NWS Tucson, AZ issued this flash flood warning at Jul 25, 2011, 3:06 PM MST for Cochise County, Arizona. It was in force for 114 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 25, 2011, 3:06 PM MST (22:06 UTC)
Expired: Jul 25, 2011, 5:00 PM MST
In force: 114 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Flood severity: None

County Cochise County, AZ

The radar

The Tucson radar (KEMX), 130 km from the middle of the area, began a volume at 22:09 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, 10.1 hours before the alert went out and 158 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: 911 J/kg
Mixed-layer CIN: -73 J/kg
Mixed-layer LCL: 1219 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: -15 m²/s²
0-3 km storm-relative helicity: -7 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.

758 
WGUS55 KTWC 252206
FFWTWC
AZC003-260000-
/O.NEW.KTWC.FF.W.0025.110725T2206Z-110726T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
306 PM MST MON JUL 25 2011

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

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

* UNTIL 500 PM MST

* AT 254 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
THUNDERSTORMS PRODUCING VERY HEAVY RAIN OVER THE HORSESHOE 2 BURN 
AREA. RADAR ESTIMATES INDICATE THAT UP TO 1.00 INCHES OF RAINFALL 
WILL BE POSSIBLE OVER THE NEXT 2 HOURS. THIS WILL CAUSE FLOODING AND 
DEBRIS FLOWS IN CANYONS AND STREAMS IN THE CHIRICAHUA MOUNTAINS.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PORTAL...
  PARADISE AND CHIRICAHUA NATIONAL MONUMENT

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 3203 10938 3202 10906 3162 10906 3163 10941

$$

SHOEMAKER

2 follow-up statements

916 
WGUS75 KTWC 252314
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
414 PM MST MON JUL 25 2011

AZC003-260000-
/O.CON.KTWC.FF.W.0025.000000T0000Z-110726T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COCHISE AZ-
414 PM MST MON JUL 25 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 500 PM MST FOR EAST
CENTRAL COCHISE COUNTY...

AT 405 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A THUNDERSTORM PRODUCING VERY HEAVY RAIN OVER PORTIONS OF 
THE HORSESHOE 2 BURN AREA. AN AUTOMATED WEATHER STATION AT RUCKER 
CANYON REPORTED .63 OF AN INCH IN ONE HOUR...WITH RADAR ESTIMATING 
HOURLY RAINFALL RATES OF UP TO 1.5 INCHES IN SPOTS. BASED ON 
RADAR...THE HEAVIEST RAINFALL HAS BEEN LOCATED OVER FLYS PEAK AND 
NORTHWEST OF RUCKER CANYON IN THE STANFORD CREEK DRAINAGE AREA.  

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PORTAL...
PARADISE AND CHIRICAHUA NATIONAL MONUMENT

LAT...LON 3203 10938 3202 10906 3162 10906 3163 10941

$$

508 
WGUS75 KTWC 260003
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
503 PM MST MON JUL 25 2011

AZC003-260012-
/O.EXP.KTWC.FF.W.0025.000000T0000Z-110726T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COCHISE AZ-
503 PM MST MON JUL 25 2011

...THE FLASH FLOOD WARNING HAS EXPIRED FOR EAST CENTRAL COCHISE
COUNTY...

HEAVY RAINFALL HAD ENDED ACROSS THE AREA. HOWEVER...SMALL STREAMS 
AND CREEKS IN BASINS THAT RECEIVED RAIN WILL CONTINUE TO FLOW FOR 
THE NEXT HOUR OR SO. 

LAT...LON 3203 10938 3202 10906 3162 10906 3163 10941

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 24, 5:03 PM MST	Areal Flood Advisory	TWC	Cochise	87 min
Jul 24, 5:28 PM MST	Flash Flood Warning	TWC	Pima	92 min
Jul 24, 5:40 PM MST	Severe Thunderstorm Warning	TWC	Cochise	35 min
Jul 24, 6:13 PM MST	Areal Flood Advisory	TWC	Cochise, Graham	3 hr
Jul 24, 7:15 PM MST	Areal Flood Advisory	TWC	Cochise	3 hr
Jul 25, 11:54 AM MST	Areal Flood Advisory	TWC	Cochise, Pima, Santa Cruz	2 hr
Jul 25, 1:19 PM MST	Special Weather Statement	TWC	Pima	26 min
Jul 25, 2:04 PM MST	Areal Flood Advisory	TWC	Pima, Santa Cruz	116 min
Jul 25, 4:57 PM MST	Severe Thunderstorm Warning	TWC	Graham	33 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.