Alert archive / Arizona / Flash Flood Warnings in 2004

Flash Flood Warning 1, NWS Tucson, AZ

July 12, 2004Graham County, Arizona

NWS Tucson, AZ issued this flash flood warning at Jul 12, 2004, 3:55 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, 2004, 3:55 PM MST (22:55 UTC)
Expired: Jul 12, 2004, 6:00 PM MST
In force: 2 hr
Issued by: NWS Tucson, AZ
Area: Counties, with a storm outline in the text

County Graham County, AZ

The radar

The Tucson radar (KEMX), 112 km from the middle of the area, began a volume at 22:55 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, 10.9 hours before the alert went out and 110 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: 816 J/kg
Mixed-layer CIN: -186 J/kg
Mixed-layer LCL: 2469 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 21 m²/s²
0-3 km storm-relative helicity: 5 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.

000 
WGUS55 KTWC 122258
FFWTWC
AZC009-130200-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
355 PM MST MON JUL 12 2004

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CENTRAL GRAHAM COUNTY IN ARIZONA
    INCLUDING THE PINALENO BURN AREAS

* UNTIL 700 PM MST

* AT 355 PM MST...WEATHER SERVICE DOPPLER RADAR INDICATED VERY 
  HEAVY   RAIN ON MOUNT GRAHAM...OR ABOUT 18 MILES SOUTHWEST OF 
  SAFFORD. THUNDERSTORMS PRODUCING THE VERY HEAVY RAIN WERE MOVING 
  TO THE WEST AT 15 MPH. ADDITIONAL THUNDERSTORMS ARE EXPECTED TO
  AFFECT THIS AREA DURING THE NEXT 2 TO 3 HOURS.

FLASH FLOODING OF CREEKS...ROADS...AND NORMALLY DRY WASHES IS LIKELY.
THE HEAVY RAINS COULD ALSO TRIGGER ROCK AND MUDSLIDES...ESPECIALLY
IN THE STEEP TERRAIN NEAR THE BURN AREAS.

LAT...LON 3260 10979 3278 10983 3281 11003 3264 11003

$$

FRANCIS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 12, 2:50 PM MST	Severe Thunderstorm Warning	TWC	Pima	55 min
Jul 12, 2:59 PM MST	Severe Thunderstorm Warning	TWC	Pima	61 min

Nearby

Flash Flood Warnings in Arizona, 2004 Every flash flood warning in 2004

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.