Alert archive / Arizona / Flash Flood Warnings in 1996

Flash Flood Warning 18, NWS Phoenix, AZ

August 27, 1996Pinal County, Arizona

NWS Phoenix, AZ issued this flash flood warning at Aug 27, 1996, 8:00 PM MST for Pinal County, Arizona. It was in force for 60 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 27, 1996, 8:00 PM MST (03:00 UTC)
Expired: Aug 27, 1996, 9:00 PM MST
In force: 60 min
Issued by: NWS Phoenix, AZ
Area: Whole counties

County Pinal County, AZ

The radar

The Phoenix radar (KIWA), 52 km from the middle of the area, began a volume at 02:42 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

The nearest sounding before it

Tuscon, AZ (KTUS), launched 00:00Z, 3.0 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 502 J/kg
Mixed-layer CIN: -56 J/kg
Mixed-layer LCL: 1956 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -53 m²/s²
0-3 km storm-relative helicity: -32 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

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

000 
TTAA00 KPHX 280303
FFWPHX
AZC021-280400-

BULLETIN - EBS ACTIVATION REQUESTED
SEVERE THUNDERSTORM AND FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PHOENIX AZ
800 PM MST TUE AUG 27 1996

THE NATIONAL WEATHER SERVICE IN PHOENIX AZ HAS ISSUED A SEVERE
THUNDERSTORM AND FLASH FLOOD WARNING EFFECTIVE UNTIL 900 PM MST FOR
PEOPLE IN THE FOLLOWING LOCATIONS...

IN SOUTH-CENTRAL ARIZONA

  ...NORTHWEST PINAL COUNTY
     INCLUDING CASA GRANDE

AT 758 PM...PHOENIX RADAR INDICATED A SEVERE THUNDERSTORM JUST NORTH
OF CASA GRANDE...OR 40 MILES SOUTHEAST OF PHOENIX. THIS STORM WAS
MOVING WEST AT 5 MPH.

SEVERE THUNDERSTORMS PRODUCE DAMAGING WINDS IN EXCESS OF 57
MPH...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN.
IF THREATENING WEATHER DEVELOPS OR APPROACHES YOUR LOCATION...BE
PREPARED TO MOVE TO A SAFE PLACE IMMEDIATELY.

BEACH

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 27, 5:13 PM MST	Severe Thunderstorm Warning	PSR	Gila	62 min
Aug 27, 6:05 PM MST	Severe Thunderstorm Warning	PSR	Pinal	55 min
Aug 27, 7:17 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	53 min
Aug 27, 8:00 PM MST	Severe Thunderstorm Warning	PSR	Pinal	60 min
Aug 27, 8:01 PM MST	Flash Flood Warning	PSR	Maricopa, Pinal	74 min
Aug 27, 8:01 PM MST	Severe Thunderstorm Warning	PSR	Maricopa, Pinal	74 min
Aug 27, 8:30 PM MST	Flash Flood Warning	PSR	Maricopa	60 min
Aug 27, 8:30 PM MST	Severe Thunderstorm Warning	PSR	Maricopa	60 min

Nearby

Flash Flood Warnings in Arizona, 1996 Every 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; radar from the NEXRAD Level II archive.