Alert archive / Arizona / Flash Flood Warnings in 1999
Flash Flood Warning 13, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Jul 14, 1999, 6:53 PM MST for Pima County, Arizona. It was in force for 92 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
- Jul 14, 1999, 6:53 PM MST (01:53 UTC)
- Expired
- Jul 14, 1999, 8:25 PM MST
- In force
- 92 min
- Issued by
- NWS Tucson, AZ
- Area
- Whole counties
County Pima County, AZ
The radar
The Tucson radar (KEMX), 112 km from the middle of the area, began a volume at 01:53 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, 1.9 hours before the alert went out and 84 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
- 8 J/kg
- Mixed-layer CIN
- -67 J/kg
- Mixed-layer LCL
- 2929 m above ground
- 0-6 km bulk shear
- 2 kt
- 0-1 km storm-relative helicity
- 13 m²/s²
- 0-3 km storm-relative helicity
- 12 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 150147 FFWTUS AZC019-150325- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE TUCSON AZ 653 PM MST WED JUL 14 1999 THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A * FLASH FLOOD WARNING FOR... EASTERN PIMA COUNTY IN SOUTHERN ARIZONA INCLUDING TUCSON * UNTIL 825 PM MST * AT 645... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM WITH VERY HEAVY RAIN OVER SOUTHWEST TUCSON...MOVING NORTHEAST AT 10~ MPH. RAINFALL RATES IN EXCESS OF TWO INCHES PER HOUR CAN BE EXPECTED WITH THESE STORMS. *
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 Jul 14, 2:30 PM MST, 4 hours 23 minutes earlier.
Area forecast discussion, Jul 14, 2:30 PM MST, 4 hours 23 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 230 PM MST WED JUL 14 1999 SYNOPSIS...A TROUGH OF LOW PRESSURE WILL LIFT NORTHEAST ACROSS THE STATE TONIGHT. THIS HAS ENHANCED THE THUNDERSTORMS TONIGHT WITH MAIN THREAT BEING HEAVY DOWNPOURS WITH ANY OF THE STORMS. THURSDAY WILL BEGIN A TREND OF LESS ACTIVITY AS UPPER RIDGE OF HIGH PRESSURE SAGS SOUTH WITH A DRIER SOUTHWEST WIND FLOW ALOFT OVER THE AREA. SO EXPECT ISOLATED TO SCATTERED THUNDERSTORMS THROUGH THE WEEKEND. DISCUSSION...HAS BEEN A BUSY DAY SO FAR...NOT MANY WARNINGS BUT A LOT OF RADAR WATCHING...WITH MOST OF THE ACTIVTY FROM TUCSON EAST. WESTERN AREAS SLOWER TO GET GOING BUT ITS ONLY A MATTER OF TIME. ATMOSPHERE IS PLENTY UNSTABLE AND LOTS OF MOISTURE AROUND FOR AN ACTIVE NIGHT. MODIFIED 12Z TUS SOUNDING FOR 2 PM TEMP/DEWPOINT OF 96F/59F GAVE SBCAPE OF 1700 J/KG AND LIFTED INDEX OF -7. GOES DERIVED SOUNDER DATA BACKS THIS UP. TROUGH LIFTING ACROSS THE STATE TONIGHT WITH BEST DYNAMICS UP NORTH. HOWEVER ENOUGH TO KEEP THINGS GOING UNTIL AROUND MIDNIGHT AND WITH PRECIPITABLE WATER VALUES 125% OF NORMAL ACROSS THE AREA...MAIN THREAT WILL BE HEAVY RAINFALL. SO FLASH FLOOD WATCH WAS HOISTED THIS MORNING THROUGH MIDNIGHT FOR ALL OF SE AZ. ALTHOUGH WESTERN ZONES ARE SLOW TO START WILL KEEP THEM IN WATCH AREA. UPPER RIDGE SAG SOUTH NEXT SEVERAL DAYS AND CONTINES INTO THE WEEKEND. A DRIER SW FLOW ALOFT WILL SLOWLY PUSH MOISTURE EAST WITH THE WESTERN ZONES DRYING OUT THE MOST. WILL SHOW A DOWNTURN IN AREAL COVERAGE NEXT COUPLE OF DAYS AND CONTINUE INTO THE WEEKEND. TEMPERATURES WARMING UP SLIGHTLY IN RESPONSE TO A LITTLE DRIER AIR. GLUECK. .TWC...FLOOD WATCH ALL SOUTHEAST ARIZONA THRU MIDNIGHT.
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 15, 6:49 AM MST | Flash Flood Warning | TWC | Pima | 86 min |
| Jul 15, 8:14 AM MST | Flash Flood Warning | TWC | Pima | 61 min |
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; radar from the NEXRAD Level II archive.