Alert archive / Arizona / Flash Flood Warnings in 1996

Flash Flood Warning 61, NWS Tucson, AZ

August 20, 1996Pinal County, Arizona

NWS Tucson, AZ issued this flash flood warning at Aug 20, 1996, 2:45 PM MST for Pinal County, Arizona. It was in force for 75 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 20, 1996, 2:45 PM MST (21:45 UTC)
Expired
Aug 20, 1996, 4:00 PM MST
In force
75 min
Issued by
NWS Tucson, AZ
Area
Whole counties

County Pinal County, AZ

The nearest sounding before it

Tuscon, AZ (KTUS), launched 12:00Z, 9.8 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 1996-08-20Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 174 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 12:00Z on 1996-08-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -32 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
174 J/kg
Mixed-layer CIN
-165 J/kg
Mixed-layer LCL
1844 m above ground
0-6 km bulk shear
7 kt
0-1 km storm-relative helicity
-32 m²/s²
0-3 km storm-relative helicity
-4 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.

NWS Tucson, AZ wrote its last area forecast discussion before this flash flood warning went out at Aug 20, 2:27 PM MST, 18 minutes earlier.

Area forecast discussion, Aug 20, 2:27 PM MST, 18 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TUCSON AZ
230 PM MST TUE AUG 20 1996

WDLY SCT TO SCT THUNDERSTORMS DEVELOPING OVR SERN AZ ATTM.  INTERFACE
BETWEEN DRIER/MOIST AMS ON WATER VAPOR LOOP SHOWING MOST ACTIVTY ATTM
...AND INITIAL DEVELOPMENT HAS BEEN ON THE HIER TERRAIN.  STARTING TO
SEE DEVELOPMENT IN THE LOWERS AREAS AND EXPECT WDLY SCT TO SCT STMS TO
CONTINUE TO DEVELOP INTO THE EVENING.  AMS MOIST ENUF FOR LOCALIZED
HEAVY RAIN...BUT HAVE OPTED TO HOLD OFF ON FLASH FLOOD WATCH SINCE
EXPECT ANY PROBLEMS TO REMAIN LOCALIZED.  FLOW OVER THE NEXT FEW DAYS
BECOMES MORE FAVORABLE...AND MODELS APPEAR TO BE EVOLVING TOWARD
MCCOLLUM TYPE 1 PATTERN BY END OF THE WEEK.  HIGH CENTER FAR ENOUGH
NORTH SHOULD SEE INCREASED MONSOON CONVECTION BY THE WEEKEND.
TUS 2222. DRB.

The office that day

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

IssuedProductOfficeCountiesLasted
Aug 19, 5:28 PM MSTFlash Flood WarningTWCPima2 hr

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.