Alert archive / Arizona / Flash Flood Warnings in 1998
Flash Flood Warning 51, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Aug 24, 1998, 1:47 PM MST for Cochise County, Arizona. It was in force for 118 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 24, 1998, 1:47 PM MST (20:47 UTC)
- Expired
- Aug 24, 1998, 3:45 PM MST
- In force
- 118 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 20:50 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, 8.8 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
- 1104 J/kg
- Mixed-layer CIN
- -135 J/kg
- Mixed-layer LCL
- 1582 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- -47 m²/s²
- 0-3 km storm-relative helicity
- 62 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 242048 FFWTUS AZC003-242245- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE TUCSON AZ 147 PM MST MON AUG 24 1998 THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A * FLASH FLOOD WARNING FOR... COCHISE COUNTY IN SOUTHEASTERN ARIZONA * UNTIL 345 PM MST * AT 145 PM... NATIONAL WEATHER SERVICE DOPPLER RADAR AND SPOTTERS INDICATED THUNDERSTORMS WITH VERY HEAVY RAIN ACROSS MUCH OF COCHISE COUNTY. THE STRONGEST STORMS WERE OVER THE DOS CABEZAS MOUNTAINS...THE DRAGOON MOUNTAINS BETWEEN TOMBSTONE AND PEARCE AND ELFRIDA...AND ALSO NEAR SIERRA VISTA AND BISBEE. RADAR INDICATED RAINFALL IN EXCESS OF 2 INCHES PER HOUR. THIS UPGRADES THE SMALL STREAM FLOOD ADVIOSRY PREVIOUS ISSUED FOR SOUTHWEEST COCHISE COUNTY. T
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 24, 9:30 AM MST, 4 hours 17 minutes earlier.
Area forecast discussion, Aug 24, 9:30 AM MST, 4 hours 17 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 930 AM MST MON AUG 24 1998 SYNOPSIS...MOISTURE HAS RETURNED TO SOUTHEAST ARIZONA AND AN UPSWING IN THE THUNDERSTORM ACTVITY WILL BEGIN TODAY THROUGH MIDWEEK. DISCUSSION...COMPLICATED SCENARIO TODAY. LOTS OF MOISTURE HAS MOVED BACK INTO SOUTHEAST ARIZONA...WITH SURFACE DEW POINTS IN THE UPPER 50S TO UPPER 60S. UPPER LOW OVER BAJA AREA HELPING TO TRIGGER MORNING THUNDERSTORMS IN WESTERN PIMA COUNTY. AND RADAR HAS ALREADY SHOWN 3-4 INCHES OUT THERE THIS MORNING. 12Z TUCSON SOUNDING LOADED WITH CAPE...2000 USING THE MEAN LAYER. THIS COULD SUPPORT VERY STRONG THUNDERSTORMS WITH DAMAGING WINDS AND LARGE HAIL...IN ADDITION TO HEAVY RAIN. WONDERING ABOUT A SEVERE THUNDERSTORM WATCH. ON THE OTHER HAND...STRATIFORM CLOUD DECK INCREASING EASTERN PIMA AND COCHISE COUNTY. TOO MUCH CLOUDS WILL REDUCE HEATING. CONVECTIVE TEMPERATURE IS IN THE MID 90S. TUS 553. .TWC..n.NONE.
In the hours before
Special weather statement, Aug 24, 12:43 PM MST, 1 hour 4 minutes before
AZZ019-029>035-250700-
SPECIAL WEATHER STATEMENT...SOUTHEAST ARIZONA CONVECTIVE OUTLOOK
NATIONAL WEATHER SERVICE TUCSON AZ
1245 PM MST MON AUG 23 1998...THIS PRODUCT IS NOT UPDATED
*CONDITIONAL* *CONDITIONAL*
AREAL PROBABILITY RAIN GREATER THAN STORM
COUNTY COVERAGE OF SEVERE 1.00 2.00 MOTION
COCHISE 40 30 60 40 NW 10
GRAHAM 30 10 20 10 NW 10
GREENLEE 30 10 20 10 NW 10
TUCSON/ERN PIMA 40 30 40 20 NW 10
TOHONO OODHAM 40 30 50 20 NW 10
WESTERN PIMA 50 30 50 20 NW 10
SOUTHEAST PINAL 40 30 40 20 NW 10
SANTA CRUZ 50 30 50 30 NW 10
SYNOPSIS...LARGE INCREASE IN LOW LEVEL MOISTURE TODAY. AN UPPER
LEVEL LOW PRESSURE SYSTEM IN MEXICO IS MOVING NORTHWARD TOWARDS
SOUTHWESTERN ARIZONA. SOUTHEASTERN ARIZONA WILL NEED AFTERNOON
HEATING TO TRIGGER THUNDERSTORM DEVELOPMENT. BOTH FLASH FLOODING AND
DAMAGING WINDS ARE POSSIBLE TODAY.
*****************************************************************
KEY...
AREAL COVERAGE - PERCENT OF COUNTY OR AREA THAT WILL EXPERIENCE
THUNDERSTORMS
PROB OF SEVERE - THE PROBABILITY THAT ANY ONE OF THE STORMS WILL
REACH SEVERE LEVELS (DAMAGING WIND AND/OR
LARGE HAIL)
RAIN GRTR THAN - THE PROBABILITY THAT ANY ONE OF THE STORMS WILL
PRODUCE RAIN EXCEEDING 1 INCH OR 2 INCHES IN
ANY LOCATION
STORM MOTION - GENERAL DIRECTION TO WHICH THE STORMS WILL
LIKELY MOVE AND SPEED IN MPH
NOTE...
VALID TIME IS FROM 12:45 PM TO 12 MIDNIGHT OF THE DAY OF ISSUANCE.
THIS PRODUCT IS NOT TO BE USED IN PLACE OF SEVERE THUNDERSTORM OR
FLASH FLOOD WARNINGS OR WATCHES. THIS PRODUCT IS ONLY USED FOR
OUTLOOK PURPOSES. CORRESPONDING GRAPHICS MAY BE FOUND ON THE NWS
TUCSON INTERNET PAGE AT
HTTP://NIMBO.WRH.NOAA.GOV/TUCSON/SWO/SWO.SHTML
END/WJMThe office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 24, 8:16 AM MST | Flash Flood Warning | TWC | Pima | 59 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.