Alert archive / Arizona / Flash Flood Warnings in 1990

Flash Flood Warning 63, NWS Phoenix, AZ

September 14, 1990Pinal County, Arizona

NWS Phoenix, AZ issued this flash flood warning at Sep 14, 1990, 4:35 PM MST for Pinal County, Arizona. It was in force for 115 min.

The area

The counties it named.

The facts

Issued
Sep 14, 1990, 4:35 PM MST (23:35 UTC)
Expired
Sep 14, 1990, 6:30 PM MST
In force
115 min
Issued by
NWS Phoenix, AZ
Area
Whole counties

County Pinal 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, 11.6 hours before the alert went out and 92 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 1990-09-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 1990-09-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 42 square meters per square second.193958Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
0 m above ground
0-6 km bulk shear
18 kt
0-1 km storm-relative helicity
42 m²/s²
0-3 km storm-relative helicity
199 m²/s²
Significant tornado parameter
0.0
Supercell composite
2.3

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, Sep 14, 1:48 PM MST, 2 hours 47 minutes before
AZZ007-150300

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE YUMA AZ
150 PM MST FRI SEP 14 1990

...THUNDERSTORMS WERE BEGINING TO DEVELOP OVER THE LOWER DESERTS...

WITH HIGH HUMIDITY AND STRONG HEATING...THERE IS POTENTIAL FOR WIDELY
SCATTERED STRONG THUNDERSTORM DEVELOPMENT OVER THE LOWER DESERTS THIS
AFTERNOON. THE STORMS WILL BE SLOW MOVING...WITH LOCALLY HEAVY RAINS
AND STRONG WINDS.

BE ALERT FOR THUNDERSTORM DEVELOPMENT THIS AFTERNOOaN INTO THE EVENING.

MATHESON

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 14, 4:35 PM MSTSevere Thunderstorm WarningPSRPinal115 min

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.