Alert archive / Arizona / Flash Flood Warnings in 2002

Flash Flood Warning 90, NWS Tucson, AZ

September 10, 2002Santa Cruz County, Arizona

NWS Tucson, AZ issued this flash flood warning at Sep 10, 2002, 7:25 PM MST for Santa Cruz County, Arizona. It was in force for 35 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 10, 2002, 7:25 PM MST (02:25 UTC)
Expired
Sep 10, 2002, 8:00 PM MST
In force
35 min
Issued by
NWS Tucson, AZ
Area
Counties, with a storm outline in the text

County Santa Cruz County, AZ

The radar

The Tucson radar (KEMX), 49 km from the middle of the area, began a volume at 02:29 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, 2.4 hours before the alert went out and 239 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 2002-09-11Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1379 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 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 2002-09-11The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 40 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
1379 J/kg
Mixed-layer CIN
-35 J/kg
Mixed-layer LCL
1734 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
40 m²/s²
0-3 km storm-relative helicity
157 m²/s²
Significant tornado parameter
0.2
Supercell composite
4.4

Open this sounding in Storm Lab

The text

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

000 
WGUS55 KTWC 110227
FFWTWC
AZC023-110400-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
725 PM MST TUE SEP 10 2002

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SANTA CRUZ COUNTY IN ARIZONA
    THIS INCLUDES THE CITY OF NOGALES

* UNTIL 900 PM MST

* AT 722 PM MST...WEATHER SERVICE DOPPLER RADAR INDICATED STRONG 
  THUNDERSTORMS WITH VERY HEAVY RAIN ALONG HIGHWAY 82 FROM NOGALES
  TO PATAGONIA. MOVEMENT WAS TO THE NORTH AT 10 MPH. EXPECT
  RAINFALL AMOUNTS OF 1 TO 2 INCHES TO GENERATE FLASH FLOODING.

LAT...LON 3134 11109 3134 11049 3173 11047 3173 11116

MEYER

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 10, 5:00 PM MSTFlash Flood WarningTWCPima60 min
Sep 10, 5:02 PM MSTFlash Flood WarningTWCPima118 min
Sep 10, 7:27 PM MSTFlash Flood WarningTWCSanta Cruz93 min
Sep 10, 8:13 PM MSTSevere Thunderstorm WarningTWCPima47 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.