Alert archive / Arizona / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 32, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Aug 12, 2000, 3:17 PM MST for Pima County, Arizona. It was in force for 28 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties.
The facts
- Issued
- Aug 12, 2000, 3:17 PM MST (22:17 UTC)
- Expired
- Aug 12, 2000, 3:45 PM MST
- In force
- 28 min
- Issued by
- NWS Tucson, AZ
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Pima County, AZ
The nearest sounding before it
Tuscon, AZ (KTUS), launched 12:00Z, 10.3 hours before the alert went out and 14 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
- 32 J/kg
- Mixed-layer CIN
- -288 J/kg
- Mixed-layer LCL
- 1831 m above ground
- 0-6 km bulk shear
- 2 kt
- 0-1 km storm-relative helicity
- -4 m²/s²
- 0-3 km storm-relative helicity
- -20 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
729 WUUS55 KTWC 122217 SVRTUS AZC019-122245- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TUCSON AZ 317 PM MST SAT AUG 12 2000 THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EAST CENTRAL PIMA COUNTY IN ARIZONA THIS INCLUDES THE CITY OF TUCSON NEAR THE TUCSON AIRPORT * UNTIL 345 PM MST * AT 308 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 11 MILES SOUTH OF TUCSON...MOVING NORTHWEST AT 5 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... 8 MILES SOUTH OF TUCSON AT 345 PM MST REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST OFFICE IN TUCSON. LAT...LON 3193 11087 3202 11068 3225 11081 3214 11104
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 Aug 12, 2:30 PM MST, 47 minutes earlier.
Area forecast discussion, Aug 12, 2:30 PM MST, 47 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TUCSON AZ 230 PM MST SAT AUG 12 2000 SYNOPSIS...HIGH PRESSURE WILL REMAIN OVER NORTHERN ARIZONA FOR THE NEXT FEW DAYS. EASTERLY WINDS OVER SOUTHERN ARIZONA UNDER THE HIGH HAVE BROUGHT IN A BIT DRIER AIR FOR FEWER THUNDERSTORMS TODAY. SUNDAY WILL LIKELY SEE A FEW THUNDERSTORMS BUT MORE MOISTURE MAY BE ON TAP FOR SOUTHERN ARIZONA ON MONDAY. DISCUSSION...LIKELY HAVE SOME SUBSIDENCE OVER SOUTHERN ARIZONA BEHIND YESTERDAYS TROF. TUS SOUNDING SHOWED A BIT OF WARMING 500-200MB LAYER. ALSO A SMALL INVERSION JUST BELOW 400 MB. THIS IS WEAK SO DID NOT SHUT OFF CONVECTION ENTIRELY BUT DOES MAKE IT HARDER FOR THE CONVECTION TO PUSH THROUGH. THUS WE SEE MOUNTAIN STORMS TODAY AND ONLY A FEW PUSHING THROUGH THE UPPER LEVEL INVERSION. EXPECT THE STORMS TO STAY NEAR THE MOUNTAINS AND DIE AFTER SUNSET TONIGHT. SUNDAY WILL LIKELY BE VERY SIMILAR THEN POSSIBILITY OF ANOTHER EASTERLY WAVE SUNDAY NIGHT OR MONDAY MORNING. DEPENDING ON WHEN THE WAVE MOVES IN WILL DETERMINE HOW STRONG THE STORMS ARE WHEN THE WAVE MOVES IN. HOPEFULLY TOMORROW WE CAN TIME THE SYSTEM BETTER. PRF .TWC...NONE.
In the hours before
Special weather statement, Aug 12, 11:15 AM MST, 4 hours 2 minutes before
PHXWRKSPS 000
TTAA00 KTUS DDHHMM
AZZ019-029>035-130600-
HAZARDOUS WEATHER OUTLOOK...SOUTHEAST ARIZONA CONVECTIVE OUTLOOK
NATIONAL WEATHER SERVICE TUCSON AZ
1115 AM MST SAT AUG 12 2000
*CONDITIONAL* *CONDITIONAL*
COUNTY AREAL PROBABILITY RAIN GREATER THAN STORM
COVERAGE OF SEVERE 1.00 2.00 MOTION
COCHISE 20 1 1 0 S 2
GRAHAM 20 1 1 0 S 2
GREENLEE 40 4 4 0 S 2
TUCSON/ERN PIMA 10 0 0 0 S 2
TOHONO OODHAM 15 0 3 0 SW 5
SOUTHEAST PINAL 15 0 2 0 S 5
WESTERN PIMA 20 0 5 0 SW 10
SANTA CRUZ 20 1 1 0 S 2
SYNOPSIS...WEAK UPPER LEVEL INSTABILITY RESIDES WEST OF TUCSON IN
CENTRAL AND WESTERN PIMA COUNTY. THUS EXPECT CONVECTION TO OCCUR
PRIMARILY OVER THE MOUNTAINS DURING THE AFTERNOON AND IN THE WESTERN
DESERTS. STORMS OVER THE MOUNTAINS ARE UNLIKELY TO MOVE INTO THE
LOWER ELEVATIONS SINCE WINDS ALOFT ARE WEAK. MOIST ATMOSPHERE
REMAINS OVER ENTIRE AREA...SO HIGHER PRECIPITATION AMOUNTS CAN STILL
OCCUR WITH THESE STORMS.
*****************************************************************
KEY...
AREAL COVERAGE - PERCENT OF COUNTY OR AREA THAT WILL EXPERIENCE
THUNDERSTORMS
PROB OF SEVERE - THE PROBABILITY THAT ANY ONE OF THE STORMS WILL
REACH SEVERE LEVELS (DAMAGING WIND AND/OR
LARGE HAIL)
RAIN GRTR THAN - THE PROBABILITY THAT ANY ONE OF THE STORMS WILL
PRODUCE RAIN EXCEEDING 1 INCH OR 2 INCHES IN ANY
LOCATION
STORM MOTION - GENERAL DIRECTION TO WHICH THE STORMS WILL LIKELY
MOVE AND SPEED IN MPH
NOTE...
VALID TIME IS FROM 12:45 PM TO 12 MIDNIGHT OF THE DAY OF ISSUANCE.
THIS PRODUCT IS NOT TO BE USED IN PLACE OF SEVERE THUNDERSTORM OR
FLASH FLOOD WARNINGS OR WATCHES. THIS PRODUCT IS ONLY USED FOR
OUTLOOK PURPOSES. CORRESPONDING GRAPHICS MAY BE FOUND ON THE NWS
TUCSON INTERNET PAGE AT
HTTP://NIMBO.WRH.NOAA.GOV/TUCSON/SWO/SWO.SHTML
END/
NNNNThe office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 12, 4:56 PM MST | Flash Flood Warning | TWC | Santa Cruz | 94 min |
Nearby
Severe Thunderstorm Warnings in Arizona, 2000Every severe thunderstorm warning in 2000
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.