Alert archive / Arizona / Flash Flood Warnings in 2000

Flash Flood Warning 24, NWS Tucson, AZ

August 19, 2000Pima County, Arizona

NWS Tucson, AZ issued this flash flood warning at Aug 19, 2000, 5:10 PM MST for Pima County, Arizona. It was in force for 5 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 19, 2000, 5:10 PM MST (00:10 UTC)
Expired: Aug 19, 2000, 5:15 PM MST
In force: 5 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), 67 km from the middle of the area, began a volume at 00:09 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, 0.2 hours before the alert went out and 67 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: 19 J/kg
Mixed-layer CIN: -10 J/kg
Mixed-layer LCL: 3610 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: 4 m²/s²
0-3 km storm-relative helicity: 5 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 200012
FFWTWC
AZC019-200115-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE TUCSON AZ
510 PM MST SAT AUG 19 2000

THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  EXTREME SOUTH CENTRAL PIMA COUNTY IN ARIZONA

* UNTIL 615 PM MST

* AT 505 PM MST...WEATHER SERVICE DOPPLER RADAR INDICATED VERY HEAVY
  RAIN IN A REMOTE AREA ALONG ARIVACA ROAD OVER EXTREME SOUTH CENTRAL
  PIMA COUNTY.

* THE SLOW MOVING THUNDERSTORM WITH VERY HEAVY RAINFALL WILL CONTINUE
  IN AN AREA 6 MILES NORTHEAST OF ARIVACA. DOPPER RADAR HAS INDICATED
  THAT UP TO FOUR INCHES OF RAIN HAS FALLEN SINCE 345 PM MST.

EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL
CREEKS AND STREAMS...COUNTRY ROADS...AND NORMALLY DRY WASHES.

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 OTHER 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.

LAT...LON 3164 11138 3157 11129 3171 11114 3175 11124

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 19, 5:25 PM MST	Flash Flood Warning	TWC	Pima	5 min
Aug 19, 5:52 PM MST	Severe Thunderstorm Warning	TWC	Pima	28 min
Aug 19, 6:05 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.