Alert archive / Arizona / Flash Flood Warnings in 2011

Flash Flood Warning 32, NWS Tucson, AZ

July 31, 2011Cochise County, Arizona

NWS Tucson, AZ issued this flash flood warning at Jul 31, 2011, 7:00 PM MST for Cochise County, Arizona. It was in force for 90 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 31, 2011, 7:00 PM MST (02:00 UTC)
Expired: Jul 31, 2011, 8:30 PM MST
In force: 90 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Flood severity: None

County Cochise County, AZ

The radar

The Tucson radar (KEMX), 129 km from the middle of the area, began a volume at 02:00 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 00:00Z, 2.0 hours before the alert went out and 156 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: 278 J/kg
Mixed-layer CIN: -46 J/kg
Mixed-layer LCL: 1980 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 39 m²/s²
0-3 km storm-relative helicity: 70 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

422 
WGUS55 KTWC 010200
FFWTWC
AZC003-010330-
/O.NEW.KTWC.FF.W.0032.110801T0200Z-110801T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
700 PM MST SUN JUL 31 2011

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

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

* UNTIL 830 PM MST

* AT 654 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  FLASH FLOODING FROM A THUNDERSTORM 7 MILES NORTH OF RUCKER
  CANYON...OR 18 MILES WEST OF RODEO...MOVING WEST AT 20 MPH.

* OTHER LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO      
  PARADISE AND CHIRICAHUA NATIONAL MONUMENT...ESPECIALLY THE BURN    
  AREAS FROM THE HORSESHOE 2 FIRE. 

SHOWERS WITH SCATTERED THUNDERSTORMS CONTINUE TO PRODUCE MODERATE TO 
HEAVY RAIN ACROSS THE CHIRICAHUA MOUNTAINS...ESPECIALLY OVER THE 
HORSESHOE 2 BURN AREA. THIS WILL RAINFALL RUNOFF WILL LIKELY RESULT 
IN FLASH FLOODING NEAR PORTAL AND PARADISE.  

THIS FLASH FLOOD WARNING EXTENDS THE PREVIOUS FLASH FLOOD WARNING 
FOR THE SAME AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TO REPORT FLOODING...HAVE THE NEAREST LAW ENFORCEMENT AGENCY RELAY
YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN
TUCSON.

&&

LAT...LON 3216 10943 3200 10905 3167 10907 3158 10936

$$

1 follow-up statement

979 
WGUS75 KTWC 010325
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
825 PM MST SUN JUL 31 2011

AZC003-010332-
/O.EXP.KTWC.FF.W.0032.000000T0000Z-110801T0330Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COCHISE AZ-
825 PM MST SUN JUL 31 2011

...THE FLASH FLOOD WARNING WILL EXPIRE AT 830 PM MST FOR EAST CENTRAL
COCHISE COUNTY...

THE HEAVY RAINFALL IN THE EASTERN CHIRICAHUA MOUNTAINS...ESPECIALLY 
OVER THE HORSESHOE 2 BURN AREA EARLIER THIS EVENING HAS HAD TIME TO 
DRAIN INTO WASHES. ALTHOUGH RAINFALL RUNOFF WILL STILL LIKELY RESULT 
IN HIGH FLOWS IN THE WASHES NEAR PORTAL AND PARADISE...THE THREAT OF 
FLASH FLOODING HAS SUBSIDED.

THE AREA STILL REMAINS UNDER A SMALL STREAM FLOOD ADVISORY UNTIL 915 
PM MST.

LAT...LON 3216 10943 3200 10905 3167 10907 3158 10936

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 31, 5:06 PM MST	Flash Flood Warning	TWC	Cochise	114 min
Jul 31, 5:47 PM MST	Flash Flood Warning	TWC	Cochise	118 min
Jul 31, 6:45 PM MST	Areal Flood Advisory	TWC	Pima, Pinal	2 hr
Jul 31, 7:54 PM MST	Areal Flood Advisory	TWC	Cochise, Graham, Greenlee, Pima, Pinal, Santa Cruz	81 min
Aug 1, 2:54 PM MST	Areal Flood Advisory	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.