Alert archive / Arizona / Flash Flood Warnings in 1993
Flash Flood Warning 18, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Aug 23, 1993, 4:40 PM MST for Pima County, Arizona. It was in force for 65 min.
The area
The counties it named.
The facts
- Issued
- Aug 23, 1993, 4:40 PM MST (23:40 UTC)
- Expired
- Aug 23, 1993, 5:45 PM MST
- In force
- 65 min
- Issued by
- NWS Tucson, AZ
- Area
- Whole counties
County Pima County, AZ
The nearest sounding before it
Tuscon, AZ (KTUS), launched 12:00Z, 11.7 hours before the alert went out and 84 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 2382 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 5 m²/s²
- 0-3 km storm-relative helicity
- -30 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 232343 FFWTUS AZC019-240045- BULLETIN - EBS ACTIVATION REQUESTED SEVERE THUNDERSTORM AND FLASH FLOOD WARNING NATIONAL WEATHER SERVICE TUCSON ARIZONA 440 PM MST MON AUG 23 1993 THE NATIONAL WEATHER SERVICE IN TUCSON ARIZONA HAS ISSUED A SEVERE THUNDERSTORM AND FLASH FLOOD WARNING EFFECTIVE UNTIL 545 PM MST FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTH CENTRAL ARIZONA ...EAST CENTRAL PIMA COUNTY A SEVERE THUNDERSTORM WAS LOCATED AT RYAN FIELD ABOUT 15 MILES WEST OF TUCSON AT 430 PM. THE OBSERVER AT RYAN FIELD REPORTED A WIND GUST TO 92 MPH AT 435 PM MST. ALSO REPORTED WAS VERY HEAVY RAIN AND PEA TO MARBLE SIZED HAIL. THIS STORM WAS MOVING VERY SLOWLY SOUTH. A FLASH FLOOD WARNING MEANS THAT FLOODING IS IMMINENT. IT'S IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO STREAMS...RIVERS...OR CREEKS WHICH CAN BECOME KILLERS IN HEAVY RAINS. CAMPERS SHOULD AVOID CAMPING ALONG STREAMS OR CREEKS DURING THREATENING RAINS. THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD PREPARE FOR DAMAGING WIND IN EXCESS OF 55 MPH...LARGE HAIL... DEADLY LIGHTNING AND VERY HEAVY RAIN. IF OUTSIDE...MOVE TO A SHELTER OR INSIDE A STRONG BUILDING...BUT STAY AWAY FROM WINDOWS. WEBER &
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.
In the hours before
Special weather statement, Aug 23, 3:55 PM MST, 45 minutes before
AZC019-023-240100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TUCSON ARIZONA 355 PM MST MON AUG 23 1993 AT 345 PM MST...A FEW RATHER STRONG THUNDERSTORMS WERE INDICATED BY NATIONAL WEATHER SERVICE RADAR IN SOUTH-CENTRAL AND SOUTHEAST PIMA COUNTY AND PORTIONS OF SANTA CRUZ. THE STRONGEST AT THAT TIME WERE NEAR ARIVACA...SASABE AND 10 MILES NORTH OF SELLS. ALL OF THE THUNDERSTORMS WERE MOVING TOWARD THE SOUTH AT AROUND 10 MILES AN HOUR. THESE STORMS LIKELY WILL BE ACCOMPANIED BY BRIEF HEAVY RAIN...STRONG WIND AND LOTS OF DEADLY CLOUD TO GROUND LIGHTNING. RUNOFF INTO NORMALLY DRY WASHES CAN BE EXPECTED FOR THE NEXT COUPLE OF HOURS. BE ALERT FOR POSSIBLE SUDDEN INCREASES IN WATER FLOW. HEAD FOR SHELTER IF THREATENING WEATHER APPROACHES. MOTORISTS SHOULD NOT ATTEMPT TO CROSS FLOODED STREAMS OR HIGHWAY DIPS. WEBER
Special weather statement, Aug 23, 3:59 PM MST, 41 minutes before
AZC019-023-240100- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TUCSON ARIZONA 355 PM MST MON AUG 23 1993 AT 345 PM MST...A FEW RATHER STRONG THUNDERSTORMS WERE INDICATED BY NATIONAL WEATHER SERVICE RADAR IN SOUTH-CENTRAL AND SOUTHEAST PIMA COUNTY AND PORTIONS OF SANTA CRUZ. THE STRONGEST AT THAT TIME WERE NEAR ARIVACA...SASABE AND 10 MILES NORTH OF SELLS. ALL OF THE THUNDERSTORMS WERE MOVING TOWARD THE SOUTH AT AROUND 10 MILES AN HOUR. THESE STORMS LIKELY WILL BE ACCOMPANIED BY BRIEF HEAVY RAIN...STRONG WIND AND LOTS OF DEADLY CLOUD TO GROUND LIGHTNING. RUNOFF INTO NORMALLY DRY WASHES CAN BE EXPECTED FOR THE NEXT COUPLE OF HOURS. BE ALERT FOR POSSIBLE SUDDEN INCREASES IN WAT>ER FLOW. HEAD FOR SHELTER IF THREATENING WEATHER APPROACHES. MOTORISTS SHOULD NOT ATTEMPT TO CROSS FLOODED STREAMS OR HIGHWAY DIPS. WEBER
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 23, 4:40 PM MST | Severe Thunderstorm Warning | TWC | Pima | 45 min |
Nearby
Flash Flood Warnings in Arizona, 1993Every flash flood warning in 1993
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.