Alert archive / Arizona / Flash Flood Warnings in 1989

Flash Flood Warning 2, NWS Tucson, AZ

August 10, 1989Santa Cruz County, Arizona

NWS Tucson, AZ issued this flash flood warning at Aug 10, 1989, 3:55 PM MST for Santa Cruz County, Arizona. It was in force for 65 min.

The area

The counties it named.

The facts

Issued
Aug 10, 1989, 3:55 PM MST (22:55 UTC)
Expired
Aug 10, 1989, 5:00 PM MST
In force
65 min
Issued by
NWS Tucson, AZ
Area
Whole counties

County Santa Cruz County, AZ

The radar

The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.

The nearest sounding before it

Tuscon, AZ (KTUS), launched 12:00Z, 10.9 hours before the alert went out and 72 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 1989-08-10Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 123 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 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 1989-08-10The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 20 square meters per square second.1939Sfc1 km3 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
123 J/kg
Mixed-layer CIN
-99 J/kg
Mixed-layer LCL
1147 m above ground
0-6 km bulk shear
16 kt
0-1 km storm-relative helicity
20 m²/s²
0-3 km storm-relative helicity
74 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 102259
FFWTUS
AZC023-110000-

BULLETIN...EBS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
355 PM MST THU AUG 10 1989

THE NATIONAL WEATHER SERVICE OFFICE IN TUCSON HAS EXTENDED THE FLASH FLOOD
WARNING UNTIL 500 PM MST FOR PEOPLE IN THE FOLLOWING COUNTY OF

SOUTHEAST ARIZONA..SANTA CRUZ

AT 350 PM TUCSON RADAR INDICATED HEAVY RAIN IN THE NOGALES AREA.
ADDITIONAL THUNDERSTORMS ARE DEVELOPING IN NORTHERN MEXICO. THESE
THUNDERSTORMS ARE MOVING NORTH AND WILL MOVE INTO NOGALES AND ALL OF
SANTA CRUZ COUNTY. STREET AND URBAN FLOODING HAS BEEN REPORTED BY THE
NOGALES POLICE DEPARTMENT.

A FLASH FLOOD WARNING MEANS FLOODING HAS ALREADY OCCURRED OR IS
IMMINENT.  PEOPLE IN THE AFFE}CTED AREA SHOULD BE ON THE LOOKOUT FOR
FLOODING AND BE PREPARED TO ESCAPE TO HIGHER GROUND IMMEDIATELY.

IMES

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 10, 2:25 PM MSTFlash Flood WarningTWCSanta Cruz95 min
Aug 10, 2:45 PM MSTSevere Thunderstorm WarningTWCPima, Santa Cruz75 min

Nearby

Flash Flood Warnings in Arizona, 1989Every flash flood warning in 1989

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.