Alert archive / Arizona / Flash Flood Warnings in 2011

Flash Flood Warning 41, NWS Tucson, AZ

August 13, 2011Cochise County, Arizona

NWS Tucson, AZ issued this flash flood warning at Aug 13, 2011, 2:21 PM MST for Cochise County, Arizona. It was in force for 84 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
Aug 13, 2011, 2:21 PM MST (21:21 UTC)
Expired
Aug 13, 2011, 3:45 PM MST
In force
84 min
Issued by
NWS Tucson, AZ
Area
Storm-based polygon
Flood severity
None

County Cochise County, AZ

The radar

The Tucson radar (KEMX), 126 km from the middle of the area, began a volume at 21:21 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, 9.4 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-pSkew-T log-p diagram, Tuscon, AZ at 12:00Z on 2011-08-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 10 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tuscon, AZ at 12:00Z on 2011-08-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 4 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
10 J/kg
Mixed-layer CIN
-125 J/kg
Mixed-layer LCL
1337 m above ground
0-6 km bulk shear
8 kt
0-1 km storm-relative helicity
4 m²/s²
0-3 km storm-relative helicity
26 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.

891 
WGUS55 KTWC 132121
FFWTWC
AZC003-132245-
/O.NEW.KTWC.FF.W.0041.110813T2121Z-110813T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
221 PM MST SAT AUG 13 2011

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

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

* UNTIL 345 PM MST

* AT 214 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
FLASH FLOODING FROM A THUNDERSTORM OVER THE CHIRICAHUA MOUNTAINS 
IMPACTING THE HORSESHOE 2 FIRE BURN SCAR AREA. 

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

RAINFALL AMOUNTS OF UP TO 2 INCHES ARE POSSIBLE IN THE WARNED AREA.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

&&

LAT...LON 3178 10948 3215 10943 3209 10910 3186 10905
      3166 10916 3164 10935

$$

GL
2 follow-up statements
679 
WGUS75 KTWC 132159
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
259 PM MST SAT AUG 13 2011

AZC003-132245-
/O.CON.KTWC.FF.W.0041.000000T0000Z-110813T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COCHISE AZ-
259 PM MST SAT AUG 13 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 345 PM MST FOR EAST
CENTRAL COCHISE COUNTY...

AT 255 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE A THUNDERSTORM PRODUCING FLASH FLOODING OVER THE HORSESHOE 
2 FIRE BURN SCAR AREA IN THE CHIRICAHUA MOUNTAINS. RADAR RAINFALL 
ESTIMATES INDICATE ONE TO TWO INCHES OF RAIN HAS OCCURRED IN THIS 
REGION CAUSING FLASH FLOODING. 

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

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE.

&&

LAT...LON 3178 10948 3215 10943 3209 10910 3186 10905
      3166 10916 3164 10935

$$

GL
149 
WGUS75 KTWC 132243
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
343 PM MST SAT AUG 13 2011

AZC003-132252-
/O.EXP.KTWC.FF.W.0041.000000T0000Z-110813T2245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COCHISE AZ-
343 PM MST SAT AUG 13 2011

...THE FLASH FLOOD WARNING WILL EXPIRE AT 345 PM MST FOR EAST CENTRAL
COCHISE COUNTY...

RAINFALL HAS ENDED ACROSS THE CHIRICAHUA MOUNTAINS AFTER ONE TO TWO 
INCHES OF RAIN PRIMARILY ALONG THE RIDGETOPS. FLASH FLOODING FROM 
THE BURN SCAR AREA SHOULD HAVE NOW SUBSIDED BUT ELEVATED FLOWS ARE 
POSSIBLE FOR THE NEXT HOUR OR SO. 

LAT...LON 3178 10948 3215 10943 3209 10910 3186 10905
      3166 10916 3164 10935

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 12, 5:33 PM MSTSevere Thunderstorm WarningTWCGraham, Greenlee42 min
Aug 12, 5:50 PM MSTAreal Flood AdvisoryTWCGraham, Greenlee115 min
Aug 12, 6:19 PM MSTAreal Flood AdvisoryTWCSanta Cruz116 min
Aug 12, 6:58 PM MSTSevere Thunderstorm WarningTWCCochise, Graham62 min
Aug 12, 7:33 PM MSTAreal Flood AdvisoryTWCCochise, Graham117 min
Aug 12, 8:27 PM MSTSpecial Weather StatementTWCCochise48 min
Aug 13, 3:21 PM MSTSevere Thunderstorm WarningTWCCochise39 min
Aug 13, 3:55 PM MSTAreal Flood AdvisoryTWCCochise2 hr

Nearby

Flash Flood Warnings in Arizona, 2011Every 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.