Alert archive / Arizona / Flash Flood Warnings in 2015

Flash Flood Warning 4, NWS Tucson, AZ

July 12, 2015Graham County, Arizona

NWS Tucson, AZ issued this flash flood warning at Jul 12, 2015, 3:43 PM MST for Graham County, Arizona. It was in force for 2 hr. 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 12, 2015, 3:43 PM MST (22:43 UTC)
Expired: Jul 12, 2015, 5:45 PM MST
In force: 2 hr
Issued by: NWS Tucson, AZ
Area: Storm-based polygon
Flood severity: None

County Graham County, AZ

The radar

The Tucson radar (KEMX), 107 km from the middle of the area, began a volume at 22:47 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 (KDMA), launched 12:00Z, 10.7 hours before the alert went out and 106 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 2356 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 28 m²/s²
0-3 km storm-relative helicity: 109 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.

656 
WGUS55 KTWC 122243
FFWTWC
AZC009-130045-
/O.NEW.KTWC.FF.W.0004.150712T2243Z-150713T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
343 PM MST SUN JUL 12 2015

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTH CENTRAL GRAHAM COUNTY IN SOUTHEASTERN ARIZONA...

* UNTIL 545 PM MST
    
* AT 340 PM MST...DOPPLER RADAR INDICATED THAT THE STRONG THUNDERSTORMS 
  THAT WENT THROUGH THE SOUTHWEST PORTIONS OF THE PINALENO MOUNTAINS
  PRODUCED 1.50 TO 2.50 INCHES OF RAIN. RAINFALL RUNOFF WILL SWIFTLY 
  DRAIN INTO ASH CREEK RESULTING IN FLASH FLOODING...IMPACTING THE TOWNS OF 
  FORT GRANT AND BONITA. 

* SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
  BONITA AND FORT GRANT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD
DEATHS OCCUR IN VEHICLES.

&&

LAT...LON 3268 10987 3260 10986 3252 11003 3277 11001

$$

1 follow-up statement

817 
WGUS75 KTWC 130042
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
542 PM MST SUN JUL 12 2015

AZC009-130050-
/O.EXP.KTWC.FF.W.0004.000000T0000Z-150713T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
GRAHAM AZ-
542 PM MST SUN JUL 12 2015

...THE FLASH FLOOD WARNING FOR SOUTH CENTRAL GRAHAM COUNTY WILL
EXPIRE AT 545 PM MST...

THE HEAVY RAIN HAS ENDED...AND FLOODING IS NO LONGER EXPECTED TO 
POSE A THREAT AT THIS TIME.  ADDITIONAL SHOWERS AND THUNDERSTORMS 
MAY MOVE INTO SOUTHERN GRAHAM COUNTY THIS EVENING SO STAY TUNED TO
YOUR FAVORITE SOURCE OF WEATHER INFORMATION FOR UPDATES.

LAT...LON 3268 10987 3260 10986 3252 11003 3277 11001

$$

KD

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 11, 5:22 PM MST	Special Weather Statement	TWC		38 min
Jul 11, 5:54 PM MST	Special Weather Statement	TWC	Graham	36 min
Jul 11, 6:24 PM MST	Special Weather Statement	TWC	Graham	51 min
Jul 11, 7:25 PM MST	Areal Flood Advisory	TWC	Graham	3 hr
Jul 12, 12:58 PM MST	Special Weather Statement	TWC	Santa Cruz	32 min
Jul 12, 1:46 PM MST	Special Weather Statement	TWC	Santa Cruz	44 min
Jul 12, 1:52 PM MST	Special Weather Statement	TWC		38 min
Jul 12, 2:01 PM MST	Severe Thunderstorm Warning	TWC	Cochise, Graham	29 min
Jul 12, 2:20 PM MST	Special Weather Statement	TWC	Santa Cruz	40 min
Jul 12, 2:28 PM MST	Severe Thunderstorm Warning	TWC	Graham	47 min
Jul 12, 2:41 PM MST	Areal Flood Advisory	TWC	Cochise, Graham	3 hr
Jul 12, 2:54 PM MST	Severe Thunderstorm Warning	TWC	Pima	23 min
Jul 12, 3:16 PM MST	Special Weather Statement	TWC	Cochise	44 min
Jul 12, 3:58 PM MST	Flash Flood Warning	TWC	Santa Cruz	2 hr
Jul 12, 4:21 PM MST	Special Weather Statement	TWC	Cochise	39 min
Jul 12, 4:40 PM MST	Special Weather Statement	TWC	Cochise	50 min

Nearby

Flash Flood Warnings in Arizona, 2015 Every flash flood warning in 2015

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.