Alert archive / Arizona / Flash Flood Warnings in 1998
Flash Flood Warning 27, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Jul 22, 1998, 9:47 AM MST for Santa Cruz County, Arizona. It was in force for 3 hr. 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 22, 1998, 9:47 AM MST (16:47 UTC)
- Expired
- Jul 22, 1998, 12:50 PM MST
- In force
- 3 hr
- Issued by
- NWS Tucson, AZ
- Area
- Whole counties
County Santa Cruz County, AZ
The nearest sounding before it
Tuscon, AZ (KTUS), launched 12:00Z, 4.8 hours before the alert went out and 72 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
- 844 J/kg
- Mixed-layer CIN
- -35 J/kg
- Mixed-layer LCL
- 1063 m above ground
- 0-6 km bulk shear
- 2 kt
- 0-1 km storm-relative helicity
- 52 m²/s²
- 0-3 km storm-relative helicity
- 34 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 221649 FFWTUS AZC023-221950- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE TUCSON AZ 947 AM MST WED JUL 22 1998 THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A * FLASH FLOOD WARNING FOR... SOUTHERN SANTA CRUZ COUNTY IN SOUTHERN ARIZONA * UNTIL 1250 PM MST * AT 950 AM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF THUNDERSTORMS WITH VERY HEAVY RAIN NORTHEAST THROUGH SOUTHEAST OF NOGALES...MOVING WEST AT 10 MPH. 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 Jul 22, 9:30 AM MST, 17 minutes earlier.
Area forecast discussion, Jul 22, 9:30 AM MST, 17 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 930 AM MST WED JUL 22 1998 SYNOPSIS...A SUBTROPICAL WEATHER DISTURBANCE MOVING NORTH TOWARD SOUTHERN ARIZONA WILL SPREAD THUNDERSTORMS WITH HEAVY RAIN ACROSS MUCH OF SOUTHEAST ARIZONA INTO THE AFTERNOON HOURS. HIGH PRESSURE OVER THE FOUR CORNERS REGION WILL ALLOW A VERY MOIST MONSOONAL FLOW TO PERSIST OVER THE DESERT SOUTHWEST THROUGH THE END OF THIS WEEK. DISCUSSION...WATER VAPOR SATELLITE IMAGERY AND THE MORNING ETA MODEL GUIDANCE SHOW AN INVERTED TROUGH MOVING NORTHWARD ALONG THE GULF OF CALIFORNIA COAST. THIS TROUGH IS FORECAST TO MAKE IT INTO SOUTHERN ARIZONA BY THE LATE AFTERNOON. FORCING FROM THIS SYSTEM WAS CAUSING AN ORGANIZED COMPLEX OF SHOWERS AND THUNDERSTORMS TO CONTINUE FROM NORTHERN SONORA TO SOUTHERN PINAL COUNTY AT 9 AM. THESE STORMS WERE MOVING VERY SLOWLY TO THE NORTHWEST. PRECIPITABLE WATER VALUES IN EXCESS OF 1.5 INCHES OVER THE REGION AND THE SLOW MOVEMENT OF THESE STORMS WERE LEADING TO EXCESSIVE RAINFALL AMOUNTS IN THE STRONGEST STORMS PER SPOTTER REPORTS AND RADAR ESTIMATES. A FLASH FLOOD WATCH CONTINUES FOR AREAS UNDERNEATH THE THUNDERSTORM COMPLEX. SEVERAL FLASH FLOOD WARNINGS AND SMALL STREAM FLOOD ADVISORIES WERE IN EFFECT AT THE TIME THIS DISCUSSION WAS ISSUED. SHOULD SEE SOME BREAK OR DECREASE IN THE ACTION IN THE LATE AFTERNOON IN THE WAKE OF THE TROUGH...HOWEVER ADDITIONAL THUNDERSTORM DEVELOPMENT IS LIKELY THIS EVENING AND POSSIBLY OVERNIGHT IN THE VERY MOIST AIRMASS IN PLACE. TUS 753. OKULSKI .TWC...FLASH FLOOD WATCH ZONES 29-32>35 UNTIL 2 PM MST.
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 22, 5:30 AM MST | Flash Flood Warning | TWC | Pinal | 3 hr |
| Jul 22, 9:16 AM MST | Flash Flood Warning | TWC | Pima, Pinal | 3 hr |
| Jul 22, 2:43 PM MST | Severe Thunderstorm Warning | TWC | Graham, Greenlee | 62 min |
| Jul 22, 3:45 PM MST | Severe Thunderstorm Warning | TWC | Cochise, Graham | 50 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.