Alert archive / Arizona / Flash Flood Warnings in 1998
Flash Flood Warning 45, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Aug 11, 1998, 7:05 PM MST for Pima 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 11, 1998, 7:05 PM MST (02:05 UTC)
- Expired
- Aug 11, 1998, 8:05 PM MST
- In force
- 60 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 02:05 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, 2.1 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
- 736 J/kg
- Mixed-layer CIN
- -14 J/kg
- Mixed-layer LCL
- 2717 m above ground
- 0-6 km bulk shear
- 5 kt
- 0-1 km storm-relative helicity
- -46 m²/s²
- 0-3 km storm-relative helicity
- 13 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 120207 FFWTUS AZC019-120305- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE TUCSON AZ 705 PM MST TUE AUG 11 1998 THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A * FLASH FLOOD WARNING FOR... WESTERN PIMA COUNTY IN SOUTHERN ARIZONA * UNTIL 805 PM MST * AT 705 PM MST... AREA LAW ENFORCEMENT INDICATED A THUNDERSTORM WITH VERY HEAVY RAIN BETWEEN AJO AND WHY... MOVING SLOWLY TOWARD THE WEST. WASHES WERE ALSO REPORTzED TO BE RUNNING BETWEEN AJO AND WHY ALONG STATE HIGHWAY 85. JD
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 11, 2:30 PM MST, 4 hours 35 minutes earlier.
Area forecast discussion, Aug 11, 2:30 PM MST, 4 hours 35 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 230 PM MST TUE AUG 11 1998 SYNOPSIS...PLENTY OF MOISTURE IN SOUTHEAST ARIZONA AND THE COMBINATION OF THIS MOISTURE AND AFTERNOON HEATING WILL RESULT IN AFTERNOON AND EVENING THUNDERSTORMS FOR THE NEXT FEW DAYS. DISCUSSION...STORMS ON MTNS NOW AND QUESTION IS WILL THEY MOVE OFF OR JUST SIT THERE...BUT WITH MAX TEMP AT TUS NOW NR 100 THINK THERE WILL BE PLENTY OF ENERGY FOR STORMS TO MOVE INTO VALLEYS. H2 WNDS ARE NRLY AND THIS WILL BLOW ANVILS TO THE SOUTH WHICH IS USUALLY A POSITIVE FACTOR. SINCE THIS APPEARS TO BE AN UP DAY WILL FCST A DOWN DAY ON WED WITH STORMS DEVELOPING MAINLY NR MTNS. DONT SEE MUCH CHANGE FOR NEXT FEW DAYS AND WILL UPSWING AGAIN THU AND FRI. TUS 6223. HOLBROOK .TWC...FLASH FLOOD WATCH UNTIL 900 PM MST FOR ZONES 029...031>035.
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 5:26 PM MST | Flash Flood Warning | TWC | Pima | 64 min |
| Aug 11, 5:42 PM MST | Severe Thunderstorm Warning | TWC | Pima | 48 min |
| Aug 11, 6:30 PM MST | Flash Flood Warning | TWC | Pima | 60 min |
| Aug 11, 6:30 PM MST | Severe Thunderstorm Warning | TWC | Pima | 45 min |
| Aug 11, 6:47 PM MST | Severe Thunderstorm Warning | TWC | Pima | 33 min |
| Aug 11, 8:12 PM MST | Flash Flood Warning | TWC | Pima | 68 min |
Nearby
Flash Flood Warnings in Arizona, 1998Every flash flood warning in 1998
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.