Alert archive / Arizona / Severe Thunderstorm Warnings in 1999
Severe Thunderstorm Warning 39, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Jul 13, 1999, 8:11 PM MST for Pima County, Santa Cruz County, Arizona. It was in force for 49 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
- Jul 13, 1999, 8:11 PM MST (03:11 UTC)
- Expired
- Jul 13, 1999, 9:00 PM MST
- In force
- 49 min
- Issued by
- NWS Tucson, AZ
- Area
- Whole counties
Counties Pima County, AZ, Santa Cruz County, AZ
The radar
The Tucson radar (KEMX), 66 km from the middle of the area, began a volume at 03:13 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, 3.2 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
- 117 J/kg
- Mixed-layer CIN
- -80 J/kg
- Mixed-layer LCL
- 2701 m above ground
- 0-6 km bulk shear
- 12 kt
- 0-1 km storm-relative helicity
- 116 m²/s²
- 0-3 km storm-relative helicity
- 148 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 140305 RRA SVRTUS AZC019-023-140400- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TUCSON AZ 811 PM MST TUE JUL 13 1999 THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHEASTERN PIMA COUNTY IN SOUTHERN ARIZONA NORTHWESTERN SANTA CRUZ COUNTY IN SOUTHERN ARIZONA INCLUDING TUBAC AND AMADO. * UNTIL 900 PM MST * AT 810 PM MST... DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM WITH EXTREMELY HEAVY RAINFALL 2 MILES NORTHWEST OF TUBAC OR 2 MILES SOUTHEAST OF AMADO...MOVING NORTH AT 5 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... AMADO BY 827 PM MST ARIVACA JUNCTION BY 842 PM MST D WJM
What forecasters said that day
The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at Jul 13, 2:30 PM MST, 5 hours 41 minutes earlier.
Area forecast discussion, Jul 13, 2:30 PM MST, 5 hours 41 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 230 PM MST TUE JUL 13 1999 SYNOPSIS...HIGH PRESSURE ALOFT WILL MOVE TO THE SOUTHERN PLAINS BY THE MIDDLE OF THE WEEK. A MOIST EASTERLY FLOW WILL CONTINUE THIS WEEK GENERATING SCATTERED MAINLY AFTERNOON AND EVENING THUNDERSTORMS. DISCUSSION...SLOW START FOR STORMS IN FLASH FLOOD WATCH AREA BUT BEGINNING TO BUILD NEAR SELLS NOW AND ALONG MEXICAN BORDER BY NOGALES. OTHER STORMS HAVE BUILT UNDER COLD AIR POOL THAT WEDGED INTO FAR EASTERN PART OF STATE. STILL DONT SEE MUCH POTENTIAL FOR HEAVY RAIN IN GRAHAM OR GREENLEE COUNTIES AND STORMS SO FAR HAVE PROVED THIS POINT. NOW THE ONLY QUESTION IS HOW WELL ORGANIZED STORMS GET IN WATCH AREA. WITH TEMPS IN MID 90S TO NEAR 100 MOST AREAS THERE IS PLENTY OF CAPE TO GO AROUND. FIGURING A GOOD DAY WOULD FORECAST DOWN DAY TOMORROW BUT MODELS THROW IN DYNAMICS IN THE MIX AS TROF OUT BY VEGAS IS PUSHED EAST IN ADVANCE OF MAJOR TROF DEVELOPING OVER WESTERN STATES. BELIEVE THERE WILL BE ENOUGH MOISTURE FLUX CONVERGENCE TO KEEP SOME STORMS GOING OVERNIGHT IN WESTERN ZONES THEN DYNAMICS SHIFT A LITTLE FARTHER EAST ON WEDNESDAY. SO WILL KEEP MIDDLE OF THE ROAD MONSOON FORECAST. MRF WANTS TO DRY US OUT FOR THE WEEKEND BUT A LITTLE SUSPICIOUS AND WILL HOLD ON TO SCATTERED POPS THROUGH THE EXTENDED. STILL IT WILL BE A DIFFERENT TYPE OF MONSOON PATTERN WE ARE IN FOR NEXT WEEK. .TWC...FLASH FLOOD WATCH ZONES 029-031>034 AND WESTERN PORTION OF 035 TIL 03Z. HOLBROOK
The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 9:05 PM MST | Severe Thunderstorm Warning | TWC | Pima | 45 min |
| Jul 13, 9:18 PM MST | Flash Flood Warning | TWC | Pima | 92 min |
Nearby
Severe Thunderstorm Warnings in Arizona, 1999Every severe thunderstorm warning in 1999
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.