Alert archive / Arizona / Flash Flood Warnings in 1998
Flash Flood Warning 7, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Jul 5, 1998, 7:46 AM MST for Cochise County, Arizona. It was in force for 119 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 5, 1998, 7:46 AM MST (14:46 UTC)
- Expired
- Jul 5, 1998, 9:45 AM MST
- In force
- 119 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 14:46 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 12:00Z, 2.8 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
- 250 J/kg
- Mixed-layer CIN
- -99 J/kg
- Mixed-layer LCL
- 1046 m above ground
- 0-6 km bulk shear
- 3 kt
- 0-1 km storm-relative helicity
- -17 m²/s²
- 0-3 km storm-relative helicity
- -16 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 051447 FFWTUS AZC003-051645- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE TUCSON AZ 746 AM MST SUN JUL 5 1998 THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A * FLASH FLOOD WARNING FOR... SOUTHWESTERN COCHISE COUNTY IN SOUTHEASTERN ARIZONA INCLUDING SIERRA VISTA AND FORT HUACHUCA... * UNTIL 945 AM MST * AT 740 AM...HEAVY RAIN HAS FALLEN ACROSS SOUTHWEST COCHISE COUNTY THIS MORNING WITH A SPOTTER REPORT OF NEARLY THREE INCHES OF RAIN SOUTH OF SIERRA VISTA. ADDITIONAL HEAVY THUNDERSTORMS ARE MOVING INTO THE AREA AND ANOTHER INCH OF RAIN IS POSSIBLE WITHIN THE NEXT HOUR. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS BRIDGES...DIPS...OR LOW SPOTS IF WATER COVERS THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT.
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 5, 2:30 AM MST, 5 hours 16 minutes earlier.
Area forecast discussion, Jul 5, 2:30 AM MST, 5 hours 16 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 230 AM MST SUN JUL 5 1998 SYNOPSIS...HIGH PRESSURE ALOFT OVER NEW MEXICO WILL CONTINUE TO ALLOW MONSOONAL MOISTURE TO SPREAD ACROSS SOUTHERN ARIZONA THIS WEEK. MAINLY AFTERNOON AND EVENING SHOWERS AND THUNDERSTORMS ARE EXPECTED EACH DAY. DISCUSSION...THE MONSOON DID NOT TAKE ITS TIME MAKING AN ENTRANCE INTO SOUTHEAST ARIZONA THIS YEAR. WE ALREADY HAVE MET THE DAILY AVERAGE DEW POINT CRITERIA IN TUCSON AND OTHER KEY STATIONS THE PAST TWO DAYS. SHOULD HAVE NO PROBLEM NAILING THE THIRD DAY TODAY AND MAKE IT OFFICIAL. SHOWERS AND ISOLATED THUNDERSTORMS CONTINUE THIS MORNING. THIS ACTIVITY WILL GRADUALLY END TOWARD SUNRISE...BUT WILL REDEVELOP IN THE AFTERNOON. AREAS WITH THE LEAST OF AMOUNT OF DEBRIS CLOUDS WILL BE THE FIRST TO FIRE UP THE BOOMERS AS USUAL. MORE MOISTURE IS ON THE WAY WITH OUTFLOW BOUNDARIES FROM THUNDERSTORMS OVER THE SIERRA MADRE MOVING INTO THE GULF OF CALIFORNIA WHICH WILL TRIGGER ANOTHER GULF SURGE. THE AMOUNT OF LOW LEVEL MOISTURE ACROSS THE SOUTHEAST IS VERY IMPRESSIVE FOR ONLY THE THIRD DAY OF THE MONSOON. THE 5 PM TUCSON SOUNDING HAD 1.53 INCHES OF PRECIPITABLE WATER AND A DEW POINT TEMPERATURE OF 14 DEGREES CELCIUS AT 850 MB. THE MONSOON MOISTURE BOUNDARY HAS MOVED ACROSS ALMOST ALL OF THE COUNTY WARNING AREA PER UPPER AIR PLOTS FROM LAST EVENING. THE ETA REMAINS SHOCKINGLY CLUELESS WITH REGARDS TO THE MOISTURE FIELD THROUGH THE NEXT TWO DAYS...WAY TOO DRY. THE AVN AND NGM HAVE A BETTER GRASP OF THE MOISTURE SITUATION AND ARE PREFERRED. AGREE WITH THE EVENING FORECASTER THAT BROAD BRUSH SCATTERED POPS ARE THE WAY TO GO THROUGH MONDAY. LOCALLY HEAVY RAIN AND FLASH FLOODING ARE ALSO CONCERNS GIVEN THE HIGH PRECIPITABLE WATER VALUES ACROSS EASTERN ARIZONA AND LOCATION OF THE 850 AND 700 MB THETA E RIDGES. HIGH PRESSURE ALOFT MOVES CLOSER TO THE FOUR CORNERS REGION BY THE MIDDLE OF THE WEEK. GOOD EASTERLY FLOW ALOFT IS EXPECTED TO KEEP MONSOONAL MOISTURE ACROSS THE SOUTHEAST PORTION OF THE STATE. TUS 333. OKULSKI .TWC...NONE.
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 4, 6:02 PM MST | Severe Thunderstorm Warning | TWC | Pima | 48 min |
| Jul 4, 6:31 PM MST | Flash Flood Warning | TWC | Pima | 119 min |
| Jul 5, 7:57 AM MST | Flash Flood Warning | TWC | Pima | 2 hr |
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.