Alert archive / Arizona / Flash Flood Warnings in 1996

Flash Flood Warning 43, NWS Tucson, AZ

August 2, 1996Cochise County, Arizona

NWS Tucson, AZ issued this flash flood warning at Aug 2, 1996, 2:55 PM MST for Cochise County, Arizona. It was in force for 65 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 2, 1996, 2:55 PM MST (21:55 UTC)
Expired
Aug 2, 1996, 4:00 PM MST
In force
65 min
Issued by
NWS Tucson, AZ
Area
Whole counties

County Cochise County, AZ

The nearest sounding before it

Tuscon, AZ (KTUS), launched 12:00Z, 9.9 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 12:00Z on 1996-08-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 85 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 1996-08-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 5 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
85 J/kg
Mixed-layer CIN
-156 J/kg
Mixed-layer LCL
1012 m above ground
0-6 km bulk shear
6 kt
0-1 km storm-relative helicity
5 m²/s²
0-3 km storm-relative helicity
31 m²/s²
Significant tornado parameter
-0.0
Supercell composite
-0.3

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
TTAA00 KTUS 022155
FFWTUS
AZC003-022300-
 
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON ARIZONA
255 PM MST FRI AUG 2 1996
 
THE NATIONAL WEATHER SERVICE IN TUCSON ARIZONA HAS ISSUED A
FLASH FLOOD WARNING EFFECTIVE UNTIL  400 PM MST
FOR PEOPLE IN THE FOLLOWING LOCATION...
 
IN SOUTHEAST ARIZONA
 
   ...SOUTHWESTERN COCHISE COUNTY
 
AT 255 PM MST...TUCSON DOPPLER WEATHER RADAR INDICATED CONSIDERABLE RAIN
HAD RECENTLY FALLEN IN PORTIONS OF SOUTHWEST COCHISE COUNTY...ESPECIALLY
IN THE VICINITY OF HIGHWAY 80 NEAR THE SAN PEDRO RIVER AND BETWEEN
SIERRA VISTA AND BISBEE.
 
DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY.  THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO
CROSS SAFELY.  VEHICLES CAUGHT IN RISING WATER SHOULD BE
ABANDONED QUICKLY.  MOVE TO HIGHER GROUND.
 
A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT.  MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES.  DO
 NOT
ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS
THE ROADWAY.  NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL
ONE...ON FOOT.  TO ESCAPE RISING WATER MOVE UP TO HIGHER GROUND.

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.

NWS Tucson, AZ wrote its last area forecast discussion before this flash flood warning went out at Aug 2, 2:28 PM MST, 27 minutes earlier.

Area forecast discussion, Aug 2, 2:28 PM MST, 27 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TUCSON AZ
225 PM MST FRI AUG 2 1996

TSTMS HAVE BROKEN OUT OVER MOST OF SE AZ THIS AFTN. CONTRARY TO
EARLIER THINKING TSTMS HAVE DEVELOPED EVEN OVR THOSE AREAS THAT
GOT A GOOD DRENCHING LAST NIGHT. GOES TO SHOW THAT RULES OF
THUMB...IE TSTM ACTIVITY IS USUALLY SUPRESSED THE DAY AFTER A
MAJOR CONVECTIVE EVENT...DONT ALWAYS PAN OUT.

SATURDAY LOOKS TO BE EVEN MORE ACTIVE WITH ADDITIONAL HEATING AND
PLENTY OF MOISTURE STILL AROUND. IF MODELS ARE CORRECT TSTMS WILL
BE ON THE DECREASE SUNDAY AS A DRIER SWLY FLOW PUSHES INTO SE AZ
FROM PAC NW UPR TROF. HOWEVER WITH HURRICANE DOUGLAS LURKING OFF
THE NORTHERN MEX COAST AND POSSIBLY SOME OF ITS MOISTURE HEADING
OUR WAY THIS DRYING MIGHT NOT MATERIALIZE. THEREFORE WILL JUST
DROP POPS ONLY SLIGHTLY AT THIS TIME. TUS 4442. COLLINS

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 1, 11:30 PM MSTFlash Flood WarningTWCPima60 min
Aug 2, 12:30 AM MSTFlash Flood WarningTWCPima60 min
Aug 2, 12:30 AM MSTSevere Thunderstorm WarningTWCPima60 min

Nearby

Flash Flood Warnings in Arizona, 1996Every flash flood warning in 1996

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.