Alert archive / Arizona / Flash Flood Warnings in 2002

Flash Flood Warning 86, NWS Tucson, AZ

September 7, 2002Pima County, Arizona

NWS Tucson, AZ issued this flash flood warning at Sep 7, 2002, 7:05 PM MST for Pima County, Arizona. It was in force for 55 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
Sep 7, 2002, 7:05 PM MST (02:05 UTC)
Expired
Sep 7, 2002, 8:00 PM MST
In force
55 min
Issued by
NWS Tucson, AZ
Area
Counties, with a storm outline in the text

County Pima County, AZ

The radar

The Yuma radar (KYUX), 144 km from the middle of the area, began a volume at 02:07 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, 2.1 hours before the alert went out and 166 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-pSkew-T log-p diagram, Phoenix, AZ at 00:00Z on 2002-09-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 598 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Phoenix, AZ at 00:00Z on 2002-09-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 37 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
598 J/kg
Mixed-layer CIN
-44 J/kg
Mixed-layer LCL
1384 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
37 m²/s²
0-3 km storm-relative helicity
94 m²/s²
Significant tornado parameter
0.1
Supercell composite
0.6

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS55 KTWC 080207
FFWTWC
AZC019-080400-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
705 PM MST SAT SEP 7 2002

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  FAR WESTERN PIMA COUNTY IN ARIZONA

* UNTIL 900 PM MST

* AT 700 PM MST...WEATHER SERVICE DOPPLER RADAR INDICATED VERY
  HEAVY RAIN OVER EXTREME WESTERN PIMA COUNTY...OR ABOUT 15 TO 20 
  MILES SOUTHWEST OF AJO...MOVING NORTH AT 5 MPH.

LAT...LON 3219 11325 3217 11304 3251 11289 3250 11327

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 7, 6:00 PM MSTFlash Flood WarningTWCCochise
Sep 7, 7:07 PM MSTFlash Flood WarningTWCPima113 min
Sep 8, 1:18 PM MSTFlash Flood WarningTWCPima
Sep 8, 1:20 PM MSTFlash Flood WarningTWCPima55 min
Sep 8, 2:15 PM MSTFlash Flood WarningTWCPima60 min

Nearby

Flash Flood Warnings in Arizona, 2002Every flash flood warning in 2002

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.