Alert archive / Arizona / Flash Flood Warnings in 2011

Flash Flood Warning 28, NWS Tucson, AZ

July 26, 2011Cochise County, Arizona

NWS Tucson, AZ issued this flash flood warning at Jul 26, 2011, 11:51 AM MST for Cochise County, Arizona. It was in force for 114 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 26, 2011, 11:51 AM MST (18:51 UTC)
Expired: Jul 26, 2011, 1:45 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), 135 km from the middle of the area, began a volume at 18:52 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.

What was reported inside it

Time	Report	Where	Remark
Jul 26, 1:13 PM MST	FLASH FLOOD	5 Sw Portal, AZ	WATER AND DEBRIS FLOWING OVER CAVE CREEK ROAD AND 42A FOREST ROAD. THE RESEARCH CENTER ALSO NOTED THE NORMALLY DRY CREEK NEAR THEIR BUILDING WAS ROARING WITH DEBRIS IN THE FLASH FLOOD WATERS.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Tuscon, AZ (KTUS), launched 12:00Z, 6.9 hours before the alert went out and 163 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1952 m above ground
0-6 km bulk shear: 3 kt
0-1 km storm-relative helicity: -7 m²/s²
0-3 km storm-relative helicity: 36 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.

641 
WGUS55 KTWC 261851
FFWTWC
AZC003-262045-
/O.NEW.KTWC.FF.W.0028.110726T1851Z-110726T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
1151 AM MST TUE JUL 26 2011

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

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

* UNTIL 145 PM MST

* AT 1142 AM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED 
TO INDICATE THUNDERSTORMS WITH HEAVY RAINFALL OVER THE HORSESHOE 2 
BURN AREA NEAR PORTAL. AUTOMATED GAUGE REPORTS AND RADAR ESTIMATES 
INDICATE THAT FROM 1.00 TO 3.00 INCHES OF RAIN HAS OCCURED IN THE 
BASINS THAT FEED INTO STREAMS RUNNING THROUGH PORTAL. ANOTHER AREA 
OF HEAVY RAINFALL HAS OCCURED JUST EAST OF RUCKER CANYON. 
SIGNIFICANT DEBRIS FLOWS AND FLASH FLOODING WILL OCCUR.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PORTAL AND
  PARADISE

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.

DO NOT UNDERESTIMATE THE POWER OF FLOOD WATERS. ONLY A FEW INCHES OF
RAPIDLY FLOWING WATER CAN QUICKLY CARRY AWAY YOUR VEHICLE.

&&

LAT...LON 3201 10929 3202 10906 3165 10907 3165 10932

$$

SHOEMAKER

2 follow-up statements

671 
WGUS75 KTWC 262022
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
122 PM MST TUE JUL 26 2011

AZC003-262045-
/O.CON.KTWC.FF.W.0028.000000T0000Z-110726T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COCHISE AZ-
122 PM MST TUE JUL 26 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 145 PM MST FOR EAST
CENTRAL COCHISE COUNTY...

AT 110 PM MST...CONTINUED TO INDICATE THUNDERSTORMS WITH HEAVY 
RAINFALL OVER THE HORSESHOE 2 BURN AREA NEAR PORTAL. AUTOMATED GAUGE 
REPORTS AND RADAR ESTIMATES INDICATE THAT FROM 1.00 TO 3.00 INCHES 
OF RAIN HAS OCCURED IN THE BASINS THAT FEED INTO STREAMS RUNNING 
THROUGH PORTAL. ANOTHER AREA OF HEAVY RAINFALL HAS OCCURED JUST EAST 
OF RUCKER CANYON. SIGNIFICANT DEBRIS FLOWS AND FLASH FLOODING HAVE 
BEEN REPORTED NEAR PORTAL...ESPECIALLY ALONG SOUTH FORK ROAD.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO PORTAL 
AND PARADISE

LAT...LON 3201 10929 3202 10906 3165 10907 3165 10932

$$

SHOEMAKER

701 
WGUS75 KTWC 262044
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
144 PM MST TUE JUL 26 2011

AZC003-262052-
/O.EXP.KTWC.FF.W.0028.000000T0000Z-110726T2045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COCHISE AZ-
144 PM MST TUE JUL 26 2011

...THE FLASH FLOOD WARNING WILL EXPIRE AT 145 PM MST FOR EAST CENTRAL
COCHISE COUNTY...

THE HEAVY RAINFALL HAS ENDED. DRAINAGE FROM EARLIER HEAVY RAINS WILL 
CONTINUE AND KEEP SOME FLOW IN AREA STREAMS.

LAT...LON 3201 10929 3202 10906 3165 10907 3165 10932

$$

SHOEMAKER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 26, 3:05 AM MST	Flash Flood Watch	TWC	Graham, Greenlee	16 hr
Jul 26, 10:10 AM MST	Areal Flood Advisory	TWC	Cochise	3 hr
Jul 26, 10:20 AM MST	Flash Flood Warning	TWC	Cochise	115 min
Jul 26, 10:50 AM MST	Flash Flood Warning	TWC	Greenlee	101 min
Jul 26, 1:58 PM MST	Areal Flood Advisory	TWC	Cochise	64 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.