Alert archive / Arizona / Flash Flood Warnings in 2011

Flash Flood Warning 42, NWS Tucson, AZ

August 13, 2011Cochise County, Arizona

NWS Tucson, AZ issued this flash flood warning at Aug 13, 2011, 5:07 PM MST for Cochise County, Arizona. It was in force for 83 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
Aug 13, 2011, 5:07 PM MST (00:07 UTC)
Expired
Aug 13, 2011, 6:30 PM MST
In force
83 min
Issued by
NWS Tucson, AZ
Area
Storm-based polygon
Flood severity
None

County Cochise County, AZ

The radar

The Tucson radar (KEMX), 62 km from the middle of the area, began a volume at 00:10 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

TimeReportWhereRemark
Aug 13, 6:01 PM MSTFLASH FLOOD2 E Coronado National M, AZ1.03 INCHES IN LAST HOUR WITH FLASH FLOODING FROM MONUMENT BURN AREA ALONG MONTEZUMA CANYON RD.

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 00:00Z, 0.1 hours before the alert went out and 101 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 00:00Z on 2011-08-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 727 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 00:00Z on 2011-08-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 3 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
727 J/kg
Mixed-layer CIN
-6 J/kg
Mixed-layer LCL
2506 m above ground
0-6 km bulk shear
11 kt
0-1 km storm-relative helicity
3 m²/s²
0-3 km storm-relative helicity
28 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.

200 
WGUS55 KTWC 140007
FFWTWC
AZC003-140130-
/O.NEW.KTWC.FF.W.0042.110814T0007Z-110814T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

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

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

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

* UNTIL 630 PM MST

* AT 500 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  AN AREA OF STRONG THUNDERSTORMS MOVING INTO THE HUACHUCA
  MOUNTAIN AND HEREFORD AREAS FROM THE SOUTH...INCLUDING THE 
  MONUMENT BURN AREA. EXPECT RAINFALL AMOUNTS IN EXCESS OF 1
  INCH IN SOME LOCATIONS TO GENERATE FLASH FLOODING IN AND
  AROUND THE HUACHUCA MOUNTAINS.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO RAMSEY
  CANYON PRESERVE...PARKER CANYON LAKE...NICKSVILLE AND HEREFORD

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS INCLUDES THE FOLLOWING STREAMS AND DRAINAGES...
CARR CANYON...MILLER CANYON...STUMP CANYON...HUNTER
CANYON...BABOCOMARI RIVER AND ASH CANYON.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF WASHES
AND STREAMS...CANYONS...HIGHWAYS...AND STREETS AS OTHER DRAINAGE
AREAS AND LOW LYING SPOTS.

&&

LAT...LON 3133 11046 3153 11046 3147 11014 3133 11015

$$

MEYER
2 follow-up statements
466 
WGUS75 KTWC 140045
FFSTWC

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

AZC003-140130-
/O.CON.KTWC.FF.W.0042.000000T0000Z-110814T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COCHISE AZ-
545 PM MST SAT AUG 13 2011

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

AT 540 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE AN AREA OF THUNDERSTORMS PRODUCING LOCALLY HEAVY RAINFALL 
IN THE HUACHUCA MOUNTAIN AREA. ASH AND MILLER CANYON BASINS RECEIVED 
UP TO 1 INCH WITH HEAVIER AMOUNTS WEST NEAR PARKER CANYON LAKE.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO RAMSEY CANYON
PRESERVE...PARKER CANYON LAKE...NICKSVILLE AND HEREFORD

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THIS INCLUDES THE FOLLOWING STREAMS AND DRAINAGES...
CARR CANYON...MILLER CANYON...STUMP CANYON...HUNTER
CANYON...BABOCOMARI RIVER AND ASH CANYON.

EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL
CREEKS AND STREAMS...CANYONS...HIGHWAYS AND ROADS.

&&

LAT...LON 3133 11046 3153 11046 3147 11014 3133 11015

$$

MEYER
332 
WGUS75 KTWC 140135
FFSTWC

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

AZC003-140145-
/O.EXP.KTWC.FF.W.0042.000000T0000Z-110814T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
COCHISE AZ-
635 PM MST SAT AUG 13 2011

...THE FLASH FLOOD WARNING HAS EXPIRED FOR SOUTHWESTERN COCHISE
COUNTY...

AT 630 PM MST ONLY LIGHT SHOWERS REMAINED OVER PORTIONS OF 
SOUTHWESTERN COCHISE COUNTY.

LAT...LON 3133 11046 3153 11046 3147 11014 3133 11015

$$

MEYER

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 13, 6:38 PM MSTAreal Flood AdvisoryTWCSanta Cruz112 min
Aug 13, 7:22 PM MSTAreal Flood AdvisoryTWCGraham, Pinal3 hr
Aug 14, 12:23 AM MSTAreal Flood AdvisoryTWCPima3 hr
Aug 14, 1:30 AM 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.