Alert archive / Arizona / Flash Flood Warnings in 1999
Flash Flood Warning 34, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Aug 9, 1999, 9:55 PM MST for Cochise County, Arizona. It was in force for 2 hr. 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 9, 1999, 9:55 PM MST (04:55 UTC)
- Expired
- Aug 10, 1999, 12:00 AM MST
- In force
- 2 hr
- Issued by
- NWS Tucson, AZ
- Area
- Whole counties
County Cochise County, AZ
The nearest sounding before it
Tuscon, AZ (KTUS), launched 00:00Z, 4.9 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.
- Mixed-layer CAPE
- 155 J/kg
- Mixed-layer CIN
- -25 J/kg
- Mixed-layer LCL
- 2997 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- -14 m²/s²
- 0-3 km storm-relative helicity
- -19 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KTUS 100453 FFWTUS AZC003-100700- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE TUCSON AZ 955 PM MST MON AUG 9 1999 THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A * FLASH FLOOD WARNING FOR... CENTRAL COCHISE COUNTY IN SOUTHEASTERN ARIZONA INCLUDING ELFRIDA * UNTIL MIDNIGHT MST * UP TO 4 INCHES OF RAIN THIS EVENING IN THE CHIRACAHUA MOUNTAINS...IN ADDITION TO THE 5 INCHES NEAR THE SAME AREA YESTERDAY...WAS THREATENING THE TOWN OF ELFRIDA NEAR WHITEWATER DRAW. OFFICIALS IN ELFRIDA ARE SANDBAGGING IN CASE FLOOD WATERS COMING DOWN RUCKER CANYON MAKE IT INTO THE DRAW. ALTHOUGH LITTLE ADDITIONAL RAIN IS EXPECTED...THE RUNOFF FROM THE HEAVY RAINS EARLIER IS A SERIOUS THREAT. HEED THE ADVICE OF LOCAL OFFICIALS. DO NOT DRIVE AROUND BARRICADES. PYTLAK
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 9, 9:20 PM MST, 35 minutes earlier.
Area forecast discussion, Aug 9, 9:20 PM MST, 35 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 920 PM MST MON AUG 9 1999 SYNOPSIS...MONSOON MOISTURE HAS SPREAD BACK INTO ACROSS SOUTHEAST ARIZONA AND COMBINED WITH AN UNSEASONABLY STRONG UPPER LOW SYSTEM NEAR THE CENTRAL CALIFORNIA COAST THERE WILL BE AN UPSWING IN PRECIPITATION TONIGHT THROUGH WEDNESDAY. BY THURSDAY A DRYER SOUTHWEST WIND FLOW WILL DEVELOP AS THE UPPER LOW MOVES NORTHEAST INTO WYOMING WITH A DECREASE IN THE THUNDERSTORM ACTIVITY. DISCUSSION...ACTION PICKED UP BETWEEN 6 PM AND 8 PM WITH FLASH FLOODING OCCURING TO AREAS SOUTHEAST OF TUCSON IN COCHISE COUNTY. HAVE BEEN WATCHING BIG MCS PAST 6 HOURS MOVE EVER SO CLOSER TO SE AZ. LATEST SATELLITE IMAGERY SHOWS THAT CLOUD TOPS ARE WARMING. DEEP SOUTHERLY FLOW ALOFT BETWEEN UPPER HIGH IN CENTRAL TEXAS AND UPPER LOW OFF CENTRAL CALIFORNIA COAST WILL ALLOW REMAINS OF MCS TO CONTINUE NORTHWARD TREK OVERNIGHT. WILL SEE LOCAL DOWNPOURS NEXT SEVERAL HOURS BUT GENERAL TREND IS FOR A DECREASE IN AREAL COVERAGE BETWEEN MIDNIGHT AND 6 AM. MONSOONAL MOISTURE HAS DEEPENED ACROSS THE AREA WITH TUCSON 700 MB DEWPOINT UP TO 6C (WAS -1C AT 12Z). 18Z MESO-ETA ALSO PICKED UP WEAK VORT MAX SOUTH OF CENTRAL PIMA COUNTY WHICH IS CAUSE FOR BOOMER SOUTH OF THAT AREA THIS EVENING. MESO-ETA TAKES THIS FEATURE AND MOVES IT NORTH ACROSS SE AZ TONIGHT BETWEEN 03Z-12Z (8PM-5AM). SO ON UPDATE WILL SHOW A DECREASE IN ACTIVITY BUT KEEP ISOLATED ACTION GOING OVERNIGHT. OH BY THE WAY THE STREAK CONTINUES HERE IN TUCSON AS WE ARE AT DAY 34 FOR CONSECUTIVE DAYS WITH HIGH TEMPERATURES BELOW 100 DEGREES DURING THE SUMMER. FOURTH LONGEST SUMMER STREAK ON RECORD. GLUECK .TWC...NONE.
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 6:20 PM MST | Flash Flood Warning | TWC | Cochise | 2 hr |
| Aug 10, 12:00 AM MST | Flash Flood Warning | TWC | Cochise | 9 hr |
Nearby
Flash Flood Warnings in Arizona, 1999Every flash flood warning in 1999
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.