Alert archive / Arizona / Flash Flood Warnings in 2011

Flash Flood Warning 14, NWS Tucson, AZ

July 11, 2011Greenlee County, Arizona

NWS Tucson, AZ issued this flash flood warning at Jul 11, 2011, 3:02 PM MST for Greenlee County, Arizona. It was in force for 118 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: Jul 11, 2011, 3:02 PM MST (22:02 UTC)
Expired: Jul 11, 2011, 5:00 PM MST
In force: 118 min
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Flood severity: None

County Greenlee County, AZ

The radar

The Flagstaff radar (KFSX), 210 km from the middle of the area, began a volume at 22:04 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

Time	Report	Where	Remark
Jul 11, 4:00 PM MST	FLASH FLOOD	Hannagan Meadow, AZ	MUD SLIDE OVER HIGHWAY 191 FORCED CLOSURE OF ROAD FROM MILE MARKER 232 TO 239

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 12:00Z, 10.0 hours before the alert went out and 230 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: 685 J/kg
Mixed-layer CIN: -24 J/kg
Mixed-layer LCL: 1150 m above ground
0-6 km bulk shear: 21 kt
0-1 km storm-relative helicity: 11 m²/s²
0-3 km storm-relative helicity: 17 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.

512 
WGUS55 KTWC 112202
FFWTWC
AZC011-120000-
/O.NEW.KTWC.FF.W.0014.110711T2202Z-110712T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
302 PM MST MON JUL 11 2011

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

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

* UNTIL 500 PM MST

* AT 248 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  POSSIBLE FLASH FLOODING FROM AN AREA OF STRONG THUNDERSTORMS
  ACROSS NORTHERN GREENLEE COUNTY...INCLUDING PORTIONS OF THE WALLOW
  BURN AREA. THE STRONGEST STORMS WERE NEAR HANNAGAN MEADOW AND NORTH
  OF BLUE...MOVING NORTH AT 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...STREAMS...CANYONS...AND ROADS...AS WELL AS OTHER DRAINAGE
AREAS AND LOW LYING SPOTS.

&&

LAT...LON 3377 10904 3363 10904 3362 10903 3337 10904
      3339 10937 3371 10946 3373 10937 3375 10937
      3378 10935 3378 10905

$$

MEYER

3 follow-up statements

739 
WGUS75 KTWC 112232
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
332 PM MST MON JUL 11 2011

AZC011-120000-
/O.CON.KTWC.FF.W.0014.000000T0000Z-110712T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GREENLEE AZ-
332 PM MST MON JUL 11 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 500 PM MST/600 PM
MDT/ FOR NORTHERN GREENLEE COUNTY...

AT 325 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE AN AREA OF STRONG THUNDERSTORMS PRODUCING HEAVY RAIN ACROSS 
NORTHERN GREENLEE COUNTY. THE STRONGEST STORM WAS LOCATED NEAR 
HANNAGAN MEADOW...MOVING NORTH AT 5 MPH. EXPECT RAINFALL AMOUNTS 
BETWEEN 1 AND 2 INCHES TO CREATE FLASH FLOODING INCLUDING WITHIN 
PORTIONS OF THE WALLOW BURN AREA.

THIS THUNDERSTORM WITH EXCESSIVE RAIN WILL OTHERWISE REMAIN OVER
MAINLY RURAL AREAS OF THE INDICATED COUNTY.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3377 10904 3363 10904 3362 10903 3337 10904
      3339 10937 3371 10946 3373 10937 3375 10937
      3378 10935 3378 10905

$$

MEYER

667 
WGUS75 KTWC 112322
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
422 PM MST MON JUL 11 2011

AZC011-120000-
/O.CON.KTWC.FF.W.0014.000000T0000Z-110712T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GREENLEE AZ-
422 PM MST MON JUL 11 2011

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 500 PM MST FOR 
NORTHERN GREENLEE COUNTY...

AT 415 PM MST...SHOWERS AND THUNDERSTORMS WERE WEAKENING OVER MOST 
OF NORTHERN GREENLEE COUNTY. ADDITIONAL RAINFALL UP TO 1/2 INCH IS 
POSSIBLE WITH THE STRONGEST REMAINING STORM NOW BETWEEN ROSE PEAK 
AND BLUE. HEAVY RUNOFF WILL CONTINUE FROM EARLIER RAINFALL AMOUNTS 
BETWEEN 1 AND 2 INCHES...INCLUDING OVER PORTIONS OF THE WALLOW BURN 
AREA.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3377 10904 3363 10904 3362 10903 3337 10904
      3339 10937 3371 10946 3373 10937 3375 10937
      3378 10935 3378 10905

$$

MEYER

211 
WGUS75 KTWC 112355
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
455 PM MST MON JUL 11 2011

AZC011-120005-
/O.EXP.KTWC.FF.W.0014.000000T0000Z-110712T0000Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GREENLEE AZ-
455 PM MST MON JUL 11 2011

...THE FLASH FLOOD WARNING WILL EXPIRE AT 500 PM MST FOR NORTHERN 
GREENLEE COUNTY...

AT 455 PM MST ONLY LIGHT SHOWERS REMAINED ACROSS MOST OF NORTHERN 
GREENLEE COUNTY. SOME RUNOFF FROM EARLIER RAIN WILL CONTINUE INTO 
THE EARLY EVENING HOURS.

LAT...LON 3377 10904 3363 10904 3362 10903 3337 10904
      3339 10937 3371 10946 3373 10937 3375 10937
      3378 10935 3378 10905

$$

MEYER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 10, 11:39 PM MST	Areal Flood Advisory	TWC	Graham	111 min
Jul 11, 3:06 AM MST	Flash Flood Watch	TWC	Graham, Greenlee	17 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.