Alert archive / Arizona / Flash Flood Warnings in 1993
Flash Flood Warning 7, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Jul 11, 1993, 2:40 PM MST for Pima County, Arizona. It was in force for 60 min.
The area
The counties it named.
The facts
- Issued
- Jul 11, 1993, 2:40 PM MST (21:40 UTC)
- Expired
- Jul 11, 1993, 3:40 PM MST
- In force
- 60 min
- Issued by
- NWS Tucson, AZ
- Area
- Whole counties
County Pima County, AZ
The nearest sounding before it
Tuscon, AZ (KTUS), launched 12:00Z, 9.7 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
- 676 J/kg
- Mixed-layer CIN
- -63 J/kg
- Mixed-layer LCL
- 1396 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 26 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 112142 FFWTUS AZC019-112240- BULLETIN - EBS ACTIVATION REQUESTED SEVERE THUNDERSTORM AND FLASH FLOOD WARNING NATIONAL WEATHER SERVICE TUCSON ARIZONA 240 PM MST SUN JUL 11 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 ...EASTERN PIMA COUNTY AT 235 PM WEATHER SERVICE RADAR INDICATED A SEVERE THUNDERSTORM LOCATED NEAR VAIL IN EASTERN PIMA COUNTY. THIS THUNDERSTORM WAS PRODUCING VERY HEAVY RAIN...HAIL...STRONG WIND AND DEADLY CLOUD TO GROUND LIGHTNING. MOVEMENT WAS WEST AT ABOUT 10 MPH. PERSONS IN THE VICINITY OF THE SOUTHERN PART OF THE RINCON MOUNTAINS...VAIL...CORONA DE TUCSON AND THE SOUTHEASTERN PORTIONS OF THE GREATER TUCSON AREA ARE URGED TO SEEK SHELTER FROM THIS DANGEROUS STORM. MOTORISTS ALONG INTERSTATE 10 SHOULD EXERCISE CAUTION. BE AWARE OF FLASH FLOODING OF NORMALLY DRY WASHES...HIGHWAY DIPS AND OTHER LOW SPOTS. REMEMBER...A SEVERE THUNDERSTORM MEANS WINDS OF MORE THAN 55 MPH AND HAIL 3/4 INCH OR MORE IN DIAMETER. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY. MOVE TO HIGHER GROUND. MOST DEATHS IN FLASH FLOODING OCCUR IN AUTOMOBILES. DO NOT ATTEMPT TO CROSS BRIDGES...DIPS...OR LOWZ SPOTS IF WATER COVERS THE ROADWAY. NEVER TRY TO CROSS A FLOWING STREAM...EVEN A SMALL ONE...ON FOOT. 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, Jul 11, 11:29 AM MST, 3 hours 11 minutes before
AZC003-019-023-112130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TUCSON ARIZONA 1129 AM MST SUN JUL 11 1993 AT 11:10 AM SIGNIFICANT THUNDERSTORM ACTIVITY WAS NOTED IN SANTA CRUZ...SOUTHERN COCHISE AND EASTERN PIMA COUNTIES. LIGHTNING DETECTORS...WEATHER RADAR AND RAIN GUAGES SHOWED SOME OF THE STRONGEST THUNDERSTORM CELLS JUST 25 MILES SOUTHWEST OF TUCSON OVER THE KEYSTONE PEAK AREA. A RAIN GUAGE ON THE PEAK MEASURED OVER AN INCH OF RAIN IN LESS THAN 45 MIN. THERE WAS VERY SLOW NORTHWEST MOVEMENT OF THESE STORMS WHICH CAN RESULT IN VERY HEAVY LOCAL RAINFALL. THIS ACTIVITY IS EXPECTED TO BE ONLY THE START OF A VERY WEATHER ACTIVE DAY FOR THESE AREAS. CAUTION SHOULD BE EXERCISED IF A THUNDERSTORM APPROACHES YOUR AREA. REMEMBER THUNDERSTORMS OFTEN HARBOR DANGEROUS LIGHTNING...HAIL AND STRONG GUSTY WIND AS WELL AS HEAVY RAINFALL. STAY TUNED TO YOUR FAVORITE NEWS SOURCE IF ANY FLASH FLOOD WATCHES OR WARNINGS SHOULD NEED TO BE ISSUED. CARTER
Special weather statement, Jul 11, 11:31 AM MST, 3 hours 9 minutes before
AZC003-019-023-112130- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TUCSON ARIZONA 1129 AM MST SUN JUL 11 1993 AT 11:10 AM SIGNIFICANT THUNDERSTORM ACTIVITY WAS NOTED IN SANTA CRUZ...SOUTHERN COCHISE AND EASTERN PIMA COUNTIES. LIGHTNING DETECTORS...WEATHER RADAR AND RAIN GUAGES SHOWED SOME OF THE STRONGEST THUNDERSTORM CELLS JUST 25 MILES SOUTHWEST OF TUCSON OVER THE KEYSTONE PEAK AREA. A RAIN GUAGE ON THE PEAK MEASURED OVER AN INCH OF RAIN IN LESS THAN 45 MIN. THERE WAS VERY SLOW NORTHWEST MOVEMENT OF THESE STORMS WHICH CAN RESULT IN VERY HEAVY LOCAL RAINFALL. THIS ACTIVITY IS EXPECTED TO BE ONLY THE START OF A VERY WEATHER ACTIVE DAY FOR THESE AREAS. CAUTION SHOULD BE EXERCISED IF A THUNDERSTORM APPROACHES YOUR AREA. REMEMBER THUNDERSTORMS OFTEN HARBOR DANGEROUS LIGHTNING...HAIL AND STRONG GUSTY WIND AS WELL AS HEAVY RAINFALL. STAY TUNED TO YOUR FAVORITE NEWS SOURCE IF ANY FLASH FLOOD WATCHES OR WARNINGS SHOULD NEEdD TO BE ISSUED. CARTER
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 11, 1:11 PM MST | Severe Thunderstorm Warning | TWC | Pima | 64 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.