Alert archive / Arizona / Flash Flood Warnings in 1997

Flash Flood Warning 39, NWS Tucson, AZ

August 28, 1997Pima County, Santa Cruz County, Arizona

NWS Tucson, AZ issued this flash flood warning at Aug 28, 1997, 2:07 PM MST for Pima County, Santa Cruz County, Arizona. It was in force for 88 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Aug 28, 1997, 2:07 PM MST (21:07 UTC)
Expired
Aug 28, 1997, 3:35 PM MST
In force
88 min
Issued by
NWS Tucson, AZ
Area
Whole counties

Counties Pima County, AZ, Santa Cruz County, AZ

The nearest sounding before it

Tuscon, AZ (KTUS), launched 12:00Z, 9.1 hours before the alert went out and 56 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, Tuscon, AZ at 12:00Z on 1997-08-28Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 728 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, Tuscon, AZ at 12:00Z on 1997-08-28The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -38 square meters per square second.1939Sfc1 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
728 J/kg
Mixed-layer CIN
-165 J/kg
Mixed-layer LCL
1741 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
-38 m²/s²
0-3 km storm-relative helicity
40 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 
TTAA00 KTUS 282112 COR
FFWTUS
AZC019-023-282235-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM AND FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
207 PM MST THU AUG 28 1997

THE NATIONAL WEATHER SERVICE IN TUCSON AZ HAS ISSUED A
SEVERE THUNDERSTORM AND FLASH FLOOD WARNING EFFECTIVE UNTIL 335 PM
MST
FOR PEOPLE IN THE FOLLOWING LOCATIONS...

IN SOUTHERN ARIZONA

   ...EASTERN PIMA COUNTY
   ...SANTA CRUZ COUNTY

AT 21O PM TUCSON DOPPLER RADAR INDICATED SEVERE THUNDERSTORMS
IN FAR EASTERN PIMA COUNTY...NEAR THE RINCON AND EMPIRE
MOUNTAINS. THESE THUNDERSTORMS ARE MOVING SLOWLY NORTH.
A LINE OF SEVERE THUNDERSTORMS EXTENDED FROM 14 MILES WEST OF GREEN
VALLEY TO ARIVACA JUNCTION ALONG I-10 TO TO MILES SOUTHEAST OF
NOGALES. THE LINE OF THUNDERSTORMS WAS MOVING WEST AT 10 MPH AND
WILL AFFECT RIO RICO AND NOGALES WITHIN THE NEXT FEW MINUTES...THEN
ARIVACA BY 300 PM.

RADAR ESTIMATED RAINFALL OF NEARLY 2 INCHES HAS FALLEN ACROSS
PORTIONS OF SANTA CRUZ COUNTY. MOTORISTS SHOULD USE CAUTION AS
WASHES AND DIPS SHOULD BE FULL.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 27, 6:32 PM MSTSevere Thunderstorm WarningTWCPima78 min
Aug 27, 8:37 PM MSTSevere Thunderstorm WarningTWCPima33 min
Aug 28, 1:15 PM MSTSevere Thunderstorm WarningTWCSanta Cruz60 min
Aug 28, 1:22 PM MSTSevere Thunderstorm WarningTWCPima48 min
Aug 28, 2:07 PM MSTSevere Thunderstorm WarningTWCPima, Santa Cruz88 min
Aug 28, 4:39 PM MSTFlash Flood WarningTWCPinal91 min

Nearby

Flash Flood Warnings in Arizona, 1997Every flash flood warning in 1997

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.