Alert archive / Arizona / Flash Flood Warnings in 2011

Flash Flood Warning 27, NWS Tucson, AZ

July 26, 2011Greenlee County, Arizona

NWS Tucson, AZ issued this flash flood warning at Jul 26, 2011, 10:50 AM MST for Greenlee County, Arizona. It was in force for 101 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 26, 2011, 10:50 AM MST (17:50 UTC)
Expired
Jul 26, 2011, 12:31 PM MST
In force
101 min
Issued by
NWS Tucson, AZ
Area
Storm-based polygon
Flood severity
None

County Greenlee County, AZ

The radar

The Flagstaff radar (KFSX), 206 km from the middle of the area, began a volume at 17:53 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, 5.8 hours before the alert went out and 229 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 2011-07-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Tuscon, AZ at 12:00Z on 2011-07-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -7 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
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.

213 
WGUS55 KTWC 261750
FFWTWC
AZC011-261945-
/O.NEW.KTWC.FF.W.0027.110726T1750Z-110726T1945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
1050 AM MST TUE JUL 26 2011

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN GREENLEE COUNTY IN SOUTHEAST ARIZONA...

* UNTIL 1245 PM MST

* AT 1045 AM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  AN AREA OF STRONG THUNDERSTORMS GENERATING HEAVY RAINFALL ACROSS
  PORTIONS OF NORTHERN GREENLEE COUNTY...INCLUDING NEAR HANNAGAN
  MEADOW AND SOUTHERN PORTIONS OF THE WALLOW BURN AREA. EXPECT 
  RAINFALL AMOUNTS IN EXCESS OF 1 INCH. STORM MOVEMENT WAS TO THE
  NORTH AT ABOUT 5 MPH.

* THE STORM PRODUCING FLASH FLOODING WILL OTHERWISE REMAIN OVER
  MAINLY RURAL AREAS OF THE INDICATED COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3377 10904 3362 10903 3347 10904 3348 10938
      3369 10948 3372 10944 3373 10937 3375 10937
      3378 10935 3378 10905

$$

MEYER
2 follow-up statements
418 
WGUS75 KTWC 261846
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
1146 AM MST TUE JUL 26 2011

AZC011-261945-
/O.CON.KTWC.FF.W.0027.000000T0000Z-110726T1945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GREENLEE AZ-
1146 AM MST TUE JUL 26 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 1245 PM MST FOR 
NORTHERN GREENLEE COUNTY...

AT 1140 AM MST...THUNDERSTORMS WERE BEGINNING TO WEAKEN ACROSS MOST 
OF NORTHERN GREENLEE COUNTY. EXCESSIVE RUNOFF WILL CONTINUE FROM 
EARLIER HEAVY RAINFALL IN LOCATIONS AROUND BLUE AND HANNAGAN MEADOW 
INCLUDING SOUTHERN PORTIONS OF THE WALLOW BURN AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

LAT...LON 3377 10904 3362 10903 3347 10904 3348 10938
      3369 10948 3372 10944 3373 10937 3375 10937
      3378 10935 3378 10905

$$

MEYER
144 
WGUS75 KTWC 261931
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
1231 PM MST TUE JUL 26 2011

AZC011-261941-
/O.CAN.KTWC.FF.W.0027.000000T0000Z-110726T1945Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GREENLEE AZ-
1231 PM MST TUE JUL 26 2011

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR NORTHERN GREENLEE
COUNTY...

AT 1230 PM MST SHOWERS AND THUNDERSTORMS HAD ENDED ACROSS NORTHERN 
GREENLEE COUNTY. ADDITIONAL DEVELOPMENT IS POSSIBLE LATER TODAY.

LAT...LON 3377 10904 3362 10903 3347 10904 3348 10938
      3369 10948 3372 10944 3373 10937 3375 10937
      3378 10935 3378 10905

$$

MEYER

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 26, 3:05 AM MSTFlash Flood WatchTWCGraham, Greenlee16 hr
Jul 26, 10:10 AM MSTAreal Flood AdvisoryTWCCochise3 hr
Jul 26, 10:20 AM MSTFlash Flood WarningTWCCochise115 min
Jul 26, 11:51 AM MSTFlash Flood WarningTWCCochise114 min
Jul 26, 1:58 PM MSTAreal Flood AdvisoryTWCCochise64 min

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.