Alert archive / Arizona / Flash Flood Warnings in 1990

Flash Flood Warning 6, NWS Tucson, AZ

July 22, 1990Pima County, Arizona

NWS Tucson, AZ issued this flash flood warning at Jul 22, 1990, 10:36 PM MST for Pima County, Arizona. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
Jul 22, 1990, 10:36 PM MST (05:36 UTC)
Expired
Jul 23, 1990, 12:45 AM MST
In force
2 hr
Issued by
NWS Tucson, AZ
Area
Whole counties

County Pima 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 00:00Z, 5.6 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 1990-07-23Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 240 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 1990-07-23The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -9 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
240 J/kg
Mixed-layer CIN
-81 J/kg
Mixed-layer LCL
2798 m above ground
0-6 km bulk shear
12 kt
0-1 km storm-relative helicity
-9 m²/s²
0-3 km storm-relative helicity
49 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

What forecasters said that day

The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

In the hours before

Special weather statement, Jul 22, 9:27 PM MST, 1 hour 9 minutes before
AZZ009-230525-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUCSON AZ
925 PM MST SUN JUL 22 1990

TUCSON WEATHER RADAR INDICATED SOME STRONG THUNDERSTORM ACTIVITY ABOUT
20 TO 25 MILES NORTHEAST OF THE GREATER TUCSON AREA...OVER REDINGTON
PASS.  RADAR RETURNS SHOWED THESE STORMS TO BE QUITE STRONG...WITH
SOME VERY HEAVY RAINFALL.

PERSONS TRAVELLING OVER REDINGTON PASS SHOULD BE ALERT TO RAPIDLY RISING
WATER...AND SHOULD STAY OUT OF FLOODED DIPS AND WASHES.  THERE IS A LOT
OF LIGHTNING ASSOCIATED WITH THIS STORM AND PERSONS IN THE AFFECTED AREA
SHOULD STAY IN THEIR VEHICLES IF AT ALL POSSIBLE.

NWS/TUS/BARTOLOME

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 22, 10:36 PM MSTSevere Thunderstorm WarningTWCPima2 hr

Nearby

Flash Flood Warnings in Arizona, 1990Every flash flood warning in 1990

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.