Alert archive / Arizona / Flash Flood Warnings in 1998
Flash Flood Warning 4, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Feb 24, 1998, 5:20 PM MST for Pinal County, Arizona. It was in force for 90 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
- Feb 24, 1998, 5:20 PM MST (00:20 UTC)
- Expired
- Feb 24, 1998, 6:50 PM MST
- In force
- 90 min
- Issued by
- NWS Tucson, AZ
- Area
- Whole counties
County Pinal County, AZ
The nearest sounding before it
Tuscon, AZ (KTUS), launched 00:00Z, 0.3 hours before the alert went out and 92 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
- 42 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 1555 m above ground
- 0-6 km bulk shear
- 76 kt
- 0-1 km storm-relative helicity
- 10 m²/s²
- 0-3 km storm-relative helicity
- 4 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 250021 FFWTUS AZC021-250150- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE TUCSON AZ 520 PM MST TUE FEB 24 1998 THE NATIONAL WEATHER SERVICE IN TUCSON AZ HAS ISSUED A FLASH FLOOD WARNING EFFECTIVE UNTIL 650 PM MST FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTH CENTRAL ARIZONA ...SOUTHEASTERN PINAL COUNTY AT 510 PM MST A SPOTTER NEAR WINKELMAN REPORTED EXTENSIVE STREET FLOODING WITH HEAVY RAIN IN PROGRESS. THE BAND OF RAIN REPORTED BY THIS SPOTTER HAS MOVED INTO SOUTHWEST GRAHAM COUNTY ...BUT TUCSON DOPPLER RADAR SHOWED ANOTHER AREA OF HEAVY SHOWERS AND ISOLATED THUNDERSTORMS FROM MAMMOUTH TO ORACLE JUNCTION. THIS AREA OF MOVING TO THE NORTHEAST AT 30 MLPH. FLASH FLOODING WILL REMAIN POSSIBLE IN SOUTHEAST PINAL COUNTY THROUGH 650 PM MST. OKULSKI
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 Feb 24, 2:30 PM MST, 2 hours 50 minutes earlier.
Area forecast discussion, Feb 24, 2:30 PM MST, 2 hours 50 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 230 PM MST TUE FEB 24 1998 SYNOPSIS...WINTER STORM MOVING ACROSS AREA. FRONT MOVING INTO EASTERN AREAS AND WILL PUSH INTO NEW MXICO AROUND 500 PM. HIGH WINDS ARE OCCURING AHEAD OF THE FRONT...SHOWERS AND THUNDERSTORMS ALONG AND BEHIND THE FRONT. BROADER AREA OF RAIN EXPECTED TO DEVELOP LATER THIS EVENING. DISCUSSION...WILL ALLOW WIND ADVSY TO END AT 5PM...MOST OF WNDS SHOULD BE DOWN AS FRONTAL BAND OF PRECIP MOVES THRU. MAY NEED HIGH WND WARNING STILL FOR FAR SE AZ BUT WILL HOLD OFF ON THIS FOR NOW BUT MAY NEED TO ADD THIS IF FRONT DOES NOT GET THRU. NOT MUCH PRECIP WITH FRONT BUT EXPECTING MORE TO DEVELOP AS COLD AIR MOVES IN THE TONIGHT. THIS IS KIND OF AN IFFY SCENARIO BUT MM5 SHOWS UPSLOPE STARTING THIS EVENING AND FEEL COMFORTABLE IT WILL HAPPEN. QUESTION IS HOW MUCH RAIN...MODELS INDIACTE UP TO AN INCH ON MTNS AND THIS MAY CAUSE SOME FLOODING PROBLEMS. THICKNESS COOLING ENDS LATE TONIGHT AND PRECIP SHOULD END SHORTLY THEREAFTER. LUKS LIKE A CLIPPER WILL PASS BY FOR SOME LIGHT PRECIP THU NIGHT/FRI. TUS +94. HOLBROOK TUS...WINTER STORM WARNING ABOVE 5000 FEET TONIGHT ALL OF SOUTHEAST ARIZONA EXCEPT FAR WESTERN PIMA COUNTY.
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.