Alert archive / Arizona / Flash Flood Warnings in 2000

Flash Flood Warning 18, NWS Tucson, AZ

August 17, 2000Pima County, Arizona

NWS Tucson, AZ issued this flash flood warning at Aug 17, 2000, 5:04 PM MST for Pima County, Arizona. It was in force for 26 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.

The facts

Issued: Aug 17, 2000, 5:04 PM MST (00:04 UTC)
Expired: Aug 17, 2000, 5:30 PM MST
In force: 26 min
Issued by: NWS Tucson, AZ
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Pima County, AZ

The radar

The Tucson radar (KEMX), 55 km from the middle of the area, began a volume at 00:05 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, 0.1 hours before the alert went out and 52 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: 188 J/kg
Mixed-layer CIN: -41 J/kg
Mixed-layer LCL: 2592 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -11 m²/s²
0-3 km storm-relative helicity: 22 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 
WGUS55 KTWC 180003
FFWTWC
AZC019-180130-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
504 PM MST THU AUG 17 2000

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHEASTERN PIMA COUNTY IN ARIZONA
  THIS INCLUDES THE CITY OF GREEN VALLEY


* UNTIL 630 PM MST

* AT 455 PM MST...WEATHER SERVICE DOPPLER RADAR INDICATED VERY
  HEAVY RAIN 7 MILES WEST OF GREEN VALLEY. THE THUNDERSTORM
  RESPONSIBLE FOR THIS HEAVY RAIN WAS MOVING WEST AT 10 MPH.
  DOPPLER RADAR ESTIMATED RAINFALL RATES OF UP 2 INCHES PER HOUR
  IN THE VICINITY OF GREEN VALLEY.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT OR OCCURRING.
IF YOU ARE IN THE WARNING AREA MOVE TO HIGHER GROUND IMMEDIATELY.
RESIDENTS LIVING ALONG STREAMS AND CREEKS SHOULD TAKE IMMEDIATE
PRECAUTIONS TO PROTECT LIFE AND PROPERTY. DO NOT ATTEMPT TO CROSS
SWIFTLY FLOWING WATERS OR WATERS OF UNKNOWN DEPTH BY FOOT OR BY
AUTOMOBILE. IF YOUR VEHICLE STALLS, ABANDON IT IMMEDIATELY AND SEEK
HIGHER GROUND.

TO REPORT SEVERE WEATHER HAVE THE NEAREST LAW ENFORCEMENT AGENCY
RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE] IN
TUCSON.

LAT...LON 3176 11136 3161 11115 3179 11095 3195 11114

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 17, 5:00 PM MST	Severe Thunderstorm Warning	TWC	Pima	45 min
Aug 17, 7:00 PM MST	Flash Flood Warning	TWC	Pima, Pinal
Aug 17, 7:20 PM MST	Flash Flood Warning	TWC	Pima, Pinal
Aug 17, 7:45 PM MST	Flash Flood Warning	TWC	Cochise	30 min
Aug 17, 8:10 PM MST	Flash Flood Warning	TWC	Pima

Nearby

Flash Flood Warnings in Arizona, 2000 Every flash flood warning in 2000

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.