Alert archive / Arizona / Flash Flood Warnings in 1993
Flash Flood Warning 15, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Aug 19, 1993, 1:40 PM MST for Pima County, Santa Cruz County, Arizona. It was in force for 2 hr.
The area
The counties it named.
The facts
- Issued
- Aug 19, 1993, 1:40 PM MST (20:40 UTC)
- Expired
- Aug 19, 1993, 3:45 PM MST
- In force
- 2 hr
- Issued by
- NWS Tucson, AZ
- Area
- Whole counties
Counties Pima County, AZ, Santa Cruz County, AZ
The nearest sounding before it
Tuscon, AZ (KTUS), launched 12:00Z, 8.7 hours before the alert went out and 56 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
- 97 J/kg
- Mixed-layer CIN
- -162 J/kg
- Mixed-layer LCL
- 1706 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 89 m²/s²
- 0-3 km storm-relative helicity
- 98 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 192039 FFWTUS AZC019-AZC023-192245- BULLETIN - EBS ACTIVATION REQUESTED SEVERE THUNDERSTORM AND FLASH FLOOD WARNING NATIONAL WEATHER SERVICE TUCSON ARIZONA 140 PM MST THU AUG 19 1993 THE NATIONAL WEATHER SERVICE IN TUCSON ARIZONA HAS ISSUED A SEVERE THUNDERSTORM AND FLASH FLOOD WARNING EFFECTIVE UNTIL 345 PM MST FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTH CENTRAL ARIZONA ...SANTA CRUZ AND EASTERN PIMA COUNTY...INCLUDING TUCSON METRO AREA.. AT 130 PM A COUPLE OF VERY STRONG THUNDERSTORMS WERE OCCURING IN EASTERN PIMA COUNTY. THE STRONGEST WAS LOCATED 35 MILES SOUTHWEST OF TUCSON AND THE OTHER WAS LOCATED 65 MILES WEST OF TUCSON. VERY HEAVY RAIN WAS FALLING FROM BOTH OF THESE STORMS WITH FREQUENT CLOUD TO GROUND LIGHTNING. SEVERAL OTHER THUNDERSTORMS WERE ALSO OCCURING AND INCREASING IN INTENSITY THROUGHOUT SANTA CRUZ..EASTERN PIMA AND WESTERN COCHISE COUNTIES. MOVEMENT OF ALL THUNDERSTORMS WERE SLOW AND TO THE NORTH. 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 AWAYL FROM WINDOWS.
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 19, 12:10 PM MST, 1 hour 30 minutes before
AZC003-019-023-192115- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TUCSON ARIZONA 1210 PM MST THU AUG 19 1993 ...THUNDERSTORMS IN SOUTHEAST ARIZONA... AT 1205 PM MST WEATHER RADAR SHOWED THUNDERSTORMS OCCURRING AND DEVELOPING THROUGHOUT SANTA CRUZ, COCHISE, AND EASTERN PIMA COUNTIES. THE STRONGEST STORMS APPEARED TO BE IN CENTRAL SANTA CRUZ COUNTY... WITH ANOTHER AREA OF STRONG STORMS DEVELOPING APPROXIMATELY 35 MILES WEST OF TUCSON. AT 1210 PM CLOUDS WERE ALSO OBSERVED TO BE BUILDING IN AND AROUND THE TUCSON AREA. MOST CELLS WERE MOVING TO THE NORTH AT 5 TO 10 MPH. EXPECT DEVELOPMENT TO CONTINUE THROUGHOUT SOUTHEAST ARIZONA THE REST OF THE AFTERNOON AND EARLY EVENING. SOME OF THESE STORMS WILL PRODUCE HEAVY RAIN...STRONG GUSTY WINDS...FREQUENT LIGHTNING...AND SMALL HAIL. THUNDERSTORM DEVELOPMENT SEEMS MORE WIDESPREAD AND IS BEGINNING EARLIER TODAY THAN IN RECENT DAYS. ALL PERSONS IN SOUTHEAST ARIZONA SHOULD BE ALERT TO WHAT CAN BE A RAPIDLY CHANGING WEATHER SITUATION. FURTHER STATEMENTS OR WARNINGS WILL BE ISSUED AS NECESSARY. MEYER
Special weather statement, Aug 19, 12:13 PM MST, 1 hour 27 minutes before
AZC003-019-023-192115- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TUCSON ARIZONA 1210 PM MST THU AUG 19 1993 ...THUNDERSTORMS IN SOUTHEAST ARIZONA... AT 1205 PM MST WEATHER RADAR SHOWED THUNDERSTORMS OCCURRING AND DEVELOPING THROUGHOUT SANTA CRUZ, COCHISE, AND EASTERN PIMA COUNTIES. THE STRONGEST STORMS APPEARED TO BE IN CENTRAL SANTA CRUZ COUNTY... WITH ANOTHER AREA OF STRONG STORMS DEVELOPING APPROXIMATELY 35 MILES WEST OF TUCSON. AT 1210 PM CLOUDS WERE ALSO OBSERVED TO BE BUILDING IN AND AROUND THE TUCSON AREA. MOST CELLS WERE MOVING TO THE NORTH AT 5 TO 10 MPH. EXPECT DEVELOPMENT TO CONTINUE THROUGHOUT SOUTHEAST ARIZONA THE REST OF THE AFTERNOON AND EARLY EVENING. SOME OF THESE STORMS WILL PRODUCE HEAVY RAIN...STRONG GUSTY WINDS...FREQUENT LIGHTNING...AND SMALL HAIL. THUNDERSTORM DEVELOPMENT SEEMS MORE WIDESPREAD AND IS BEGINNING EARLIER TODAY THAN IN RECENT DAYS. ALL PERSONS IN SOUTHEAST ARIZONA SHOULD BE AL>ERT TO WHAT CAN BE A RAPIDLY CHANGING WEATHER SITUATION. FURTHER STATEMENTS OR WARNINGS WILL BE ISSUED AS NECESSARY. MEYER
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 19, 1:40 PM MST | Severe Thunderstorm Warning | TWC | Pima, Santa Cruz | 2 hr |
| Aug 19, 3:00 PM MST | Flash Flood Warning | TWC | Cochise, Pima, Santa Cruz | 2 hr |
| Aug 19, 3:00 PM MST | Severe Thunderstorm Warning | TWC | Cochise, Pima, Santa Cruz | 2 hr |
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.