Alert archive / Arizona / Flash Flood Warnings in 2011

Flash Flood Warning 20, NWS Tucson, AZ

July 24, 2011Greenlee County, Arizona

NWS Tucson, AZ issued this flash flood warning at Jul 24, 2011, 2:10 PM MST for Greenlee County, Arizona. It was in force for 110 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 24, 2011, 2:10 PM MST (21:10 UTC)
Expired: Jul 24, 2011, 4:00 PM MST
In force: 110 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Flood severity: None

County Greenlee County, AZ

The radar

The Flagstaff radar (KFSX), 200 km from the middle of the area, began a volume at 21:11 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, 9.2 hours before the alert went out and 220 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: 362 J/kg
Mixed-layer CIN: -125 J/kg
Mixed-layer LCL: 1054 m above ground
0-6 km bulk shear: 1 kt
0-1 km storm-relative helicity: 23 m²/s²
0-3 km storm-relative helicity: 93 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.

950 
WGUS55 KTWC 242110
FFWTWC
AZC011-242300-
/O.NEW.KTWC.FF.W.0020.110724T2110Z-110724T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
210 PM MST SUN JUL 24 2011

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

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

* UNTIL 400 PM MST

* AT 200 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
THUNDERSTORMS PRODUCING HEAVY RAINFALL OVER NORTHERN GREENLEE COUNTY 
IN THE WALLOW FIRE BURN AREA. RADAR ESTIMATE INDICATE THAT AROUND 
0.50 INCHES HAS FALLEN WITH A STORM TOTAL AROUND 1.00 INCHES LIKELY. 
RAPID STREAM RISES AND DEBRIS FLOWS DOWN CANYONS AND STREAMS WILL 
OCCUR.

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.

IN HILLY TERRAIN THERE ARE HUNDREDS OF LOW WATER CROSSINGS WHICH ARE
POTENTIALLY DANGEROUS IN HEAVY RAIN. DO NOT ATTEMPT TO TRAVEL ACROSS
FLOODED ROADS. FIND ALTERNATE ROUTES. IT TAKES ONLY A FEW INCHES OF
SWIFTLY FLOWING WATER TO CARRY VEHICLES AWAY.

&&

LAT...LON 3364 10949 3367 10947 3369 10946 3372 10935
      3377 10934 3377 10915 3377 10906 3340 10905
      3338 10949

$$

SHOEMAKER

2 follow-up statements

999 
WGUS75 KTWC 242208
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
308 PM MST SUN JUL 24 2011

AZC011-242300-
/O.CON.KTWC.FF.W.0020.000000T0000Z-110724T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GREENLEE AZ-
308 PM MST SUN JUL 24 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 400 PM MST FOR
NORTHERN GREENLEE COUNTY...

AT 302 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATED THUNDERSTORMS PRODUCING HEAVY RAINFALL OVER NORTHERN 
GREENLEE COUNTY IN THE WALLOW FIRE BURN AREA. RADAR ESTIMATES 
INDICATE THAT AROUND 1.00 INCHES HAS FALLEN. RAPID STREAM RISES AND 
DEBRIS FLOWS DOWN CANYONS AND STREAMS WILL OCCUR.

LAT...LON 3364 10949 3367 10947 3369 10946 3372 10935
      3377 10934 3377 10915 3377 10906 3340 10905
      3338 10949

$$

CS

587 
WGUS75 KTWC 242255
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
355 PM MST SUN JUL 24 2011

AZC011-242305-
/O.EXP.KTWC.FF.W.0020.000000T0000Z-110724T2300Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GREENLEE AZ-
355 PM MST SUN JUL 24 2011

...THE FLASH FLOOD WARNING WILL EXPIRE AT 400 PM MST FOR NORTHERN
GREENLEE COUNTY...

AT 350 PM MST...RADAR WAS INDICATING THAT THE BULK OF THE 
THUNDERSTORMS WITH VERY HEAVY RAINFALL WERE MOVING WEST OF THE 
WARNED AREA. THUS...THE FLASH FLOOD WARNING WILL EXPIRE AT 4 PM MST. 

STORMS PASSING ACROSS THE NORTHERN SECTIONS OF THE WHITE MOUNTAINS 
AND WALLOW BURN AREA WILL PRODUCE FLASH FLOODING THERE. A FLASH 
FLOOD WARNING FOR SOUTHEASTERN APACHE COUNTY REMAINS IN EFFECT UNTIL 
515 PM MST.

LAT...LON 3364 10949 3367 10947 3369 10946 3372 10935
      3377 10934 3377 10915 3377 10906 3340 10905
      3338 10949

$$

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 23, 5:39 PM MST	Severe Thunderstorm Warning	TWC	Pima	36 min
Jul 23, 5:41 PM MST	Severe Thunderstorm Warning	TWC	Pima	34 min
Jul 23, 7:09 PM MST	Severe Thunderstorm Warning	TWC	Pima	36 min
Jul 23, 9:23 PM MST	Areal Flood Advisory	TWC	Cochise	82 min
Jul 24, 5:41 AM MST	Areal Flood Advisory	TWC	Cochise, Pima, Santa Cruz	111 min
Jul 24, 6:36 AM MST	Flash Flood Watch	TWC	Cochise, Graham, Greenlee, Pima, Pinal, Santa Cruz	13 hr
Jul 24, 1:37 PM MST	Areal Flood Advisory	TWC	Cochise	3 hr
Jul 24, 4:05 PM MST	Severe Thunderstorm Warning	TWC	Graham	40 min
Jul 24, 4:15 PM MST	Flash Flood Warning	TWC	Graham	2 hr
Jul 24, 4:18 PM MST	Severe Thunderstorm Warning	TWC	Cochise	42 min
Jul 24, 4:25 PM MST	Flash Flood Warning	TWC	Cochise	3 hr
Jul 24, 4:38 PM MST	Flash Flood Warning	TWC	Cochise	112 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.