Alert archive / Arizona / Flash Flood Warnings in 1991

Flash Flood Warning 1, NWS Tucson, AZ

August 15, 1991Cochise County, Arizona

NWS Tucson, AZ issued this flash flood warning at Aug 15, 1991, 5:22 PM MST for Cochise County, Arizona. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
Aug 15, 1991, 5:22 PM MST (00:22 UTC)
Expired
Aug 15, 1991, 7:30 PM MST
In force
2 hr
Issued by
NWS Tucson, AZ
Area
Whole counties

County Cochise County, AZ

The nearest sounding before it

Tuscon, AZ (KTUS), launched 00:00Z, 0.4 hours before the alert went out and 113 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 1991-08-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 11 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 1991-08-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 15 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
11 J/kg
Mixed-layer CIN
-39 J/kg
Mixed-layer LCL
2707 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
15 m²/s²
0-3 km storm-relative helicity
39 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, Aug 15, 4:44 PM MST, 38 minutes before
AZZ009-010-160230-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TUCSON ARIZONA
445 PM MST THU AUG 15 1991

TUCSON WEATHER RADAR INDICATED THUNDERSTORMS MOVING TO THE WEST ALONG
THE ARIZONA-MEXICO BORDER.  THE STRONGEST STORMS ARE IN COCHISE COUNTY
OVER DOUGLASS AND ELFRIDA. THE LEADING EDGE OF THESE STORMS IS
APPROACHING BISBEE AT THIS TIME.
OTHER STORMS ARE OVER MOST OF SANTA CRUZ COUNTY...AND SOUTHEAST PIMA
COUNTY. WHILE THESE STORMS ARE NOT VERY STRONG AT THIS TIME...RADAR
INDICTED THAT THEY WERE BUILDING...AND COULD BE A PROBLEM SHORTLY.
ALL PERSONS INVOLVED IN OUTDOOR ACTIVITIES SHOULD KEEP AN EYE ON THE
WEATHER.  MOTORIST DRIVING ACROSS SOUTHEAST ARIZONA...ESPECIALLY I-19
SOUTH OF TUCSON...SHOULD USE CAUTION FOR THE POSSIBILITY OF SUDDEN
STRONG WINDS.  BRIEF HEAVY RAIN COULD REDUCE VISIBILITY AND LEAD TO
MINOR FLOODING OF DIPS AND WASHES.  MOTORISTS BE ADVISED... DO NOT
CROSS FLOODED ROADWAYS.

BARTOLOME

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 15, 5:03 PM MSTSevere Thunderstorm WarningTWCCochise57 min

Nearby

Flash Flood Warnings in Arizona, 1991Every flash flood warning in 1991

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.