Alert archive / Arizona / Flash Flood Warnings in 1998
Flash Flood Warning 18, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Jul 10, 1998, 6:54 PM MST for Cochise County, Arizona. It was in force for 61 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 10, 1998, 6:54 PM MST (01:54 UTC)
- Expired
- Jul 10, 1998, 7:55 PM MST
- In force
- 61 min
- Issued by
- NWS Tucson, AZ
- Area
- Whole counties
County Cochise County, AZ
The radar
The Tucson radar (KEMX), 83 km from the middle of the area, began a volume at 01:55 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 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
- 170 J/kg
- Mixed-layer CIN
- -26 J/kg
- Mixed-layer LCL
- 3745 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 9 m²/s²
- 0-3 km storm-relative helicity
- 60 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KTUS 110156 FFWTUS AZC003-110255- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE TUCSON AZ 654 PM MST FRI JUL 10 1998 THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A * FLASH FLOOD WARNING FOR... NORTHERN COCHISE COUNTY IN SOUTHEASTERN ARIZONA * UNTIL 755 PM MST * AT 655 PM MST... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A THUNDERSTORM WITH VERY HEAVY RAIN NEAR INTERSTATE 10 AND HIGHWAY 191 IN NORTHCENTRAL COCHISE COUNTY ... MOVING SLOWLY NORTH. THIS STORM WAS PRODUCING VERY HEAVY RAINFALL AROUND 2 INCHES PER HOUR IN NORTHCENTRAL COCHISE COUNTY BETWEEN WILLCOX AND BENSON... ON THE NORTH END OF THE DRAGOON MOUNTAINS. AVOID LOW AREAS AS WASHES AND DRAINAGES WILL FLOW VIOLENTLY. DRB
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 10, 2:15 PM MST, 4 hours 39 minutes earlier.
Area forecast discussion, Jul 10, 2:15 PM MST, 4 hours 39 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 215 PM MST FRI JUL 10 1998 SYNOPSIS...STRONG HIGH PRESSURE WILL EXPAND WESTWARD INTO NORTHWEST MEXICO AND ARIZONA THROUGH EARLY NEXT WEEK. AS A RESULT DAYTIME TEMPERATURES WILL BE ON THE INCREASE WITH A CONTINUED THREAT OF ISOLATED AFTERNOON AND EVENING THUNDERSTORMS. DISCUSSION...MONSOON SLOWS TO A CRAWL FOR THE NEXT TWO DAYS OR SO AS A RIDGE BUILDS IN FROM TEXAS AND SQUEEZES OFF SOME OF THE MOISTURE. WE'LL KEEP ENOUGH AROUND FOR A FEW BUILDUPS AND STORMS OVER THE MOUNTAINS...BUT WILL STRUGGLE TO SUSTAIN ANY SIGNIFICANT VALLEY ACTIVITY. COMBINATION OF STRONG HEIGHT INCREASES WITH LOWER MOISTURE LEVELS WILL ALLOW STRONG WARMING. WE'LL NEED SOME HELP FROM MEXICO IN THE FORM OF OUTFLOWS FROM ORGANIZED CONVECTION OR SOME KIND OF SURGE IF WE ARE TO BREAK OUT OF THIS QUICKLY. WILL GO AHEAD AND KEEP A CHANCE OF THUNDERSTORMS IN THE EXTENDED. MEYER TUS 111. .TWC...NONE.
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 10, 7:53 PM MST | Flash Flood Warning | TWC | Cochise | 62 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.