Alert archive / Arizona / Flash Flood Warnings in 1997

Flash Flood Warning 9, NWS Tucson, AZ

August 1, 1997Pima County, Arizona

NWS Tucson, AZ issued this flash flood warning at Aug 1, 1997, 5:55 PM MST for Pima 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 counties it named.

The facts

Issued
Aug 1, 1997, 5:55 PM MST (00:55 UTC)
Expired
Aug 1, 1997, 6:30 PM MST
In force
35 min
Issued by
NWS Tucson, AZ
Area
Whole counties

County Pima County, AZ

The radar

The Tucson radar (KEMX), 112 km from the middle of the area, began a volume at 00:57 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 00:00Z, 0.9 hours before the alert went out and 84 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 00:00Z on 1997-08-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 115 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 00:00Z on 1997-08-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -26 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
115 J/kg
Mixed-layer CIN
-180 J/kg
Mixed-layer LCL
2370 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
-26 m²/s²
0-3 km storm-relative helicity
-29 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 020056 COR
FFWTUS
AZC019-020140-

BULLETIN
FLASH FLOOD WARNING...CORRECTED
NATIONAL WEATHER SERVICE TUCSON AZ
555 PM MST FRI AUG 1 1997
 
...FLASH FLASH WARNING FOR EASTERN PIMA COUNTY HAS BEEN EXTENDED
UNTIL 630 PM MST...

...SEVERE THUNDERSTORM WARNING FOR EASTERN PIMA COUNTY WAS ALLOWED
TO EXPIRE AT 550 PM MST...

AT 545 PM MST THE SEVERE THUNDERSTORM THAT HAS BEEN AFFECTING
SOUTHEAST TUCSON SINCE 430 PM MST HAS WEAKENED BELOW SEVERE LIMITS.
THUS THE SEVERE WARNING WAS ALLOWED TO EXPIRE AT 550 PM MST.

RADAR THOUGH CONTINUED TO SHOW STRONG THUNDERSTORMS ACROSS EXTREME
SOUTHEAST TUCSON WITH VERY HEAVY RAINFALL LIKELY TO CONTINUE. THIS
ACTIVITY WILL CONTINUE ACROSS THIS AREA UNTIL 630 PM MST. THUS THE
FLASH FLOOD WARNING HAS BEEN EXTENDED THROUGH 630 PM MST.

RAINFALL AMOUNTS BETWEEN ONE AND TWO INCHES PER HOUR ARE ASSOCIATED
WITH THESE STROMS. THE HARRISON ROAD DIP CROSSING AT PANTANO WASH
MAY EXPERIENCE FLASH FLOODING...ALONG WITH OTHER WAS6HES AND LOW
SPOTS IN EXTREME SOUTHEAST TUCSON.

GLUECK

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 1, 6:33 PM MSTFlash Flood WarningTWCPima57 min
Aug 2, 3:22 PM MSTFlash Flood WarningTWCCochise63 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; radar from the NEXRAD Level II archive.