Alert archive / Arizona / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 45, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Aug 16, 2001, 7:29 PM MST for Cochise County, Pima County, Arizona. It was in force for 31 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 16, 2001, 7:29 PM MST (02:29 UTC)
- Expired
- Aug 16, 2001, 8:00 PM MST
- In force
- 31 min
- Issued by
- NWS Tucson, AZ
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Cochise County, AZ, Pima County, AZ
The nearest sounding before it
Tuscon, AZ (KTUS), launched 00:00Z, 2.5 hours before the alert went out and 34 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
- 378 J/kg
- Mixed-layer CIN
- -80 J/kg
- Mixed-layer LCL
- 2903 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 7 m²/s²
- 0-3 km storm-relative helicity
- 22 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
755 WUUS55 KTWC 170230 SVRTUS AZC003-019-170300- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TUCSON AZ 729 PM MST THU AUG 16 2001 THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EXTREME NORTHWESTERN COCHISE COUNTY IN ARIZONA EXTREME NORTHEASTERN PIMA COUNTY IN ARIZONA * UNTIL 800 PM MST * AT 728 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS FROM NEAR REDINGTON TO JUST NORTH OF BENSON...MOVING SOUTHWEST AT 15 MPH. * SEVERE THUNDERSTORMS WILL BE NEAR... SAGUARO NATIONAL PARK EAST AT 750 PM IF SEVERE WEATHER APPROACHES YOUR AREA...GO INSIDE A STURDY SHELTER AWAY FROM CREEK BEDS AND OTHER FLOOD-PRONE AREAS. REMEMBER...A SEVERE THUNDERSTORM CAN PRODUCE LARGE DAMAGING HAIL...DAMAGING WINDS IN EXCESS OF 57 MPH...DEADLY LIGHTNING...AND VERY HEAVY RAIN. LAT...LON 3252 11049 3199 11033 3193 11067 3251 11085 PYTLAK
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 16, 6:18 PM MST, 1 hour 11 minutes earlier.
Area forecast discussion, Aug 16, 6:18 PM MST, 1 hour 11 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION...MESOSCALE UPDATE NATIONAL WEATHER SERVICE TUCSON AZ 618 PM MST THU AUG 16 2001 .SYNOPSIS...HIGH PRESSURE WILL BUILD IN FROM THE WEST THE NEXT FEW DAYS. THE RESULTING FLOW PATTERN WILL DIMINISH THUNDERSTORM COVERAGE...ESPECIALLY OVER THE WESTERN DESERTS...WITH DRIER AIR TO THE NORTH AND DEEPER MOISTURE IN NORTHERN MEXICO. BY EARLY NEXT WEEK...THE HIGH MOVES EAST OF ARIZONA AND THE FLOW BECOMES FAVORABLE FOR A RETURN TO NORMAL THUNDERSTORM ACTIVITY. .DISCUSSION...SEVERAL STORM CLUSTERS CONTINUE TO MOVE GENERALLY W TOWARD KTUS FROM COCHISE/GRAHAM COUNTIES. CELL ORGANIZATION HAS BEEN LOOSE, PULSEY, AND OUTFLOW DOMINATED SO FAR. 00Z KTUS SOUNDING IS SURPRISINGLY STABLE (CAPE AROUND 900 J/KG) WITH A CAP AT 500MB. THE ONE TROUBLING THING I SEE IS THAT OUR BOUNDARY LAYER IS VERY DEEP AND RATHER DRY. INVERTED-V EXTENDING UP TO 600MB RAISES A RED FLAG FOR MICROBURSTS AS THE STORMS STRUGGLE TO MOVE INTO THE SANTA CRUZ VALLEY THROUGH 8 PM. TSTMS HAVE RECENTLY WEAKENED IN W COCHISE COUNTY AS THEY HIT MORE STABLE AIR. LAPS DATA FROM 00Z SHOWS THE HIGHEST CAPES OVER EASTERN PINAL AND SANTA CRUZ COUNTIES, BOTH OF WHICH CLEARED OUT A LITTLE EARLIER THIS AFTERNOON. HOWEVER, THE 21Z RUN INDICATES COME MID LEVEL COOLING WITHIN THE NEXT 3 HRS AS UPPER LEVEL DIVERGENCE INCREASES OVER SE AZ. THERE ARE ALSO SEVERAL OUTFLOW BOUNDARIES NOW MOVING TOWARD THE AREA, A COUPLE OF WHICH ARE GOING TO COLLIDE BASED ON WSR-88S LOOPS. IN SUMMARY, ANY STORMS WHICH CAN DEVELOP OVER PINAL, EASTERN PIMA, AND SANTA CRUZ COUNTIES WILL HAVE THE POTENTIAL TO PRODUCE MICROBURSTS OVER THE NEXT SEVERAL HOURS. HOWEVER, COVERAGE WILL BE ISOLATED THANKS TO OUR SOMEWHAT LIMITED CAPES. PYTLAK .TWC...NONE.
In the hours before
Local storm report, Aug 16, 5:47 PM MST, 1 hour 42 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TUCSON ARIZONA
547 PM MST THU AUG 16 2001
TIME (MST) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0500 PM PISINEMO AZ WIND DAMAGE
08/16/01 PIMA ROOF RIPPED OFF HOUSE IN PISINIMO
WITH POWER LINES DOWN.The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 16, 7:02 PM MST | Severe Thunderstorm Warning | TWC | Cochise | 28 min |
| Aug 16, 9:16 PM MST | Severe Thunderstorm Warning | TWC | Pinal | 29 min |
| Aug 16, 10:03 PM MST | Severe Thunderstorm Warning | TWC | Pinal | 57 min |
| Aug 17, 1:15 AM MST | Flash Flood Warning | TWC | Pima | 30 min |
Nearby
Severe Thunderstorm Warnings in Arizona, 2001Every severe thunderstorm warning in 2001
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.