Alert archive / Arizona / Flash Flood Warnings in 1996
Flash Flood Warning 75, NWS Tucson, AZ
NWS Tucson, AZ issued this flash flood warning at Aug 29, 1996, 9:39 PM MST for Pima County, Arizona. It was in force for 66 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
- Aug 29, 1996, 9:39 PM MST (04:39 UTC)
- Expired
- Aug 29, 1996, 10:45 PM MST
- In force
- 66 min
- Issued by
- NWS Tucson, AZ
- Area
- Whole counties
County Pima County, AZ
The radar
The Tucson radar (KEMX), 112 km from the middle of the area, began a volume at 04:40 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Tuscon, AZ (KTUS), launched 00:00Z, 4.7 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
- 868 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 2548 m above ground
- 0-6 km bulk shear
- 3 kt
- 0-1 km storm-relative helicity
- 2 m²/s²
- 0-3 km storm-relative helicity
- 47 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 300439 FFWTUS AZC019-300545- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM AND FLASH FLOOD WARNING NATIONAL WEATHER SERVICE TUCSON ARIZONA 939 PM MST THU AUG 29 1996 THE NATIONAL WEATHER SERVICE IN TUCSON ARIZONA HAS ISSUED A SEVERE THUNDERSTORM AND FLASH FLOOD WARNING EFFECTIVE UNTIL 1045 PM MST FOR PEOPLE IN THE FOLLOWING LOCATION... IN SOUTH CENTRAL ARIZONA ...EASTERN PIMA COUNTY INCLUDING METROPOLITAN TUCSON AT 935 PM...DOPPLER RADAR INDICATED THUNDERSTORMS INTENSIFYING OVER EAST TUCSON TO SEVERE LEVELS. THESE STORMS WERE GENERALLY MOVING TO THE SOUTHWEST AT 10 MPH AND ARE EXPECTED TO FURTHER INTENSIFY OVER THE CITY BY 10 PM. VERY HEAVY RAIN...DAMAGING WINDS ...LARGE HAIL...AND FREQUENT LIGHTNING ARE ALL POSSIBLE WITH THESE STORMS. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLASH FLOODS AND SEVERE WEATHER. BRYANT
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 Aug 29, 9:03 PM MST, 36 minutes earlier.
Area forecast discussion, Aug 29, 9:03 PM MST, 36 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 900 PM MST THU AUG 29 1996 SE PINAL AND NE PIMA COUNTY THE FOCUS FOR SVR TSTMS THIS EVENING. THESE STORMS WILL CONTINUE AND PROPAGATE SWWD INTO THE EARLY MORNING HOURS. TOO BUSY WITH SVR WX TO LOOK AT ANY NEW MODEL DATA BUT CURRENT FORECAST LOOKS GOOD WITH SCT TSTMS TO CONTINUE NEXT COUPLE OF DAYS AS GOOD LOW LEVEL MOISTURE WILL CONTINUE. TUS 5232. COLLINS
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 29, 6:16 PM MST | Severe Thunderstorm Warning | TWC | Pima, Pinal | 59 min |
| Aug 29, 7:11 PM MST | Severe Thunderstorm Warning | TWC | Pinal | 64 min |
| Aug 29, 7:37 PM MST | Flash Flood Warning | TWC | Pinal | 68 min |
| Aug 29, 7:37 PM MST | Severe Thunderstorm Warning | TWC | Pinal | 68 min |
| Aug 29, 7:50 PM MST | Flash Flood Warning | TWC | Pima | 55 min |
| Aug 29, 7:50 PM MST | Severe Thunderstorm Warning | TWC | Pima | 55 min |
| Aug 29, 8:57 PM MST | Flash Flood Warning | TWC | Pinal | 63 min |
| Aug 29, 8:57 PM MST | Severe Thunderstorm Warning | TWC | Pinal | 63 min |
| Aug 29, 9:39 PM MST | Severe Thunderstorm Warning | TWC | Pima | 66 min |
| Aug 29, 10:32 PM MST | Severe Thunderstorm Warning | TWC | Santa Cruz | 58 min |
| Aug 29, 10:47 PM MST | Severe Thunderstorm Warning | TWC | Pima | 43 min |
| Aug 29, 11:21 PM MST | Severe Thunderstorm Warning | TWC | Pima, Santa Cruz | 69 min |
| Aug 30, 12:11 AM MST | Flash Flood Warning | TWC | Pima | 2 hr |
Nearby
Flash Flood Warnings in Arizona, 1996Every flash flood warning in 1996
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; radar from the NEXRAD Level II archive.