Alert archive / Arizona / Flash Flood Warnings in 2007

Flash Flood Warning 2, NWS Tucson, AZ

July 6, 2007Pima County, Arizona

NWS Tucson, AZ issued this flash flood warning at Jul 6, 2007, 9:28 PM MST for Pima County, Arizona. It was in force for 3 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 6, 2007, 9:28 PM MST (04:28 UTC)
Expired: Jul 7, 2007, 12:30 AM MST
In force: 3 hr
Issued by: NWS Tucson, AZ
Area: Counties, with a storm outline in the text
Flood severity: None

County Pima County, AZ

The radar

The Phoenix radar (KIWA), 133 km from the middle of the area, began a volume at 04:27 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

Phoenix, AZ (KPSR), launched 00:00Z, 4.5 hours before the alert went out and 133 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: 47 J/kg
Mixed-layer CIN: -118 J/kg
Mixed-layer LCL: 3729 m above ground
0-6 km bulk shear: 10 kt
0-1 km storm-relative helicity: 8 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 070431
FFWTWC
AZC019-070730-
/X.NEW.KTWC.FF.W.0002.070707T0428Z-070707T0730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
928 PM MST FRI JUL 6 2007

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTH CENTRAL PIMA COUNTY IN SOUTH CENTRAL ARIZONA...

* UNTIL 1230 AM MST

* AT 923 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED   
HEAVY RAIN FROM A THUNDERSTORM OVER THE WESTERN TOHONO OODHAM 
NATION. FLASH FLOODING IS OCCURRING IN NUMEROUS WASHES IN THE 
HICKIWAN AREA INCLUDING THE HICKIWAN WASH. SWIFT WATER RESCUES HAVE 
ALREADY TAKEN PLACE NORTH OF HICKIWAN. LOW LYING ROADWAYS ARE 
PARTICULARLY VULNERABLE TO FLASH FLOODING.

* LOCATIONS IN THE WARNING INCLUDE HICKIWAN AND SAN SIMON ON THE 
TOHONO OODHAM NATION.

ADDITIONAL RAINFALL AMOUNTS UP TO ONE INCH ARE POSSIBLE IN THE 
WARNED AREA.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE
UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS
SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

THIS WARNING EXTENDS THE PREVIOUSLY ISSUED FLASH FLOOD WARNING FOR
THIS AREA.

LAT...LON 3219 11265 3215 11230 3252 11227 3252 11261

$$

WEATHER.GOV/TUCSON
GL

1 follow-up statement

000 
WGUS75 KTWC 070734
FFSTWC

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
1228 AM MST SAT JUL 7 2007

AZC019-070738-
/X.EXP.KTWC.FF.W.0002.000000T0000Z-070707T0730Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
PIMA AZ-
1228 AM MST SAT JUL 7 2007

...THE FLASH FLOOD WARNING WILL EXPIRE AT 1230 AM MST FOR NORTH 
CENTRAL PIMA COUNTY... 

THE FLASH FLOOD WARNING IS REPLACED BY A SMALL STREAM FLOOD WARNING 
WHICH IS IN EFFECT UNTIL 145 AM. RAINFALL OVER THE AREA HAS 
DIMINISHED ENDING THE FLASH FLOOD THREAT. HOWEVER...RUNOFF FROM 
EARLIER HEAVY RAINFALL HAS CAUSED LARGE WASHES OVER THE AREA TO 
FLOOD...MOST NOTABLY THE HICKIWAN AND KAKA WASHES.

LAT...LON 3219 11265 3215 11230 3252 11227 3252 11261

$$

WEATHER.GOV/TUCSON
SHOEMAKER

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 6, 6:21 PM MST	Severe Thunderstorm Warning	TWC	Pima	36 min
Jul 6, 7:21 PM MST	Severe Thunderstorm Warning	TWC	Pima	39 min
Jul 6, 7:31 PM MST	Flash Flood Warning	TWC	Pima	119 min
Jul 6, 11:44 PM MST	Areal Flood Warning	TWC	Pima	2 hr

Nearby

Flash Flood Warnings in Arizona, 2007 Every flash flood warning in 2007

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.