Alert archive / Arizona / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 10, NWS Tucson, AZ
NWS Tucson, AZ issued this severe thunderstorm warning at Jul 2, 2001, 7:14 PM MST for 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
- Jul 2, 2001, 7:14 PM MST (02:14 UTC)
- Expired
- Jul 2, 2001, 7:45 PM MST
- In force
- 31 min
- Issued by
- NWS Tucson, AZ
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
County Pima County, AZ
The radar
The Tucson radar (KEMX), 43 km from the middle of the area, began a volume at 02:14 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, 2.2 hours before the alert went out and 30 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
- 88 J/kg
- Mixed-layer CIN
- -2 J/kg
- Mixed-layer LCL
- 4590 m above ground
- 0-6 km bulk shear
- 21 kt
- 0-1 km storm-relative helicity
- 36 m²/s²
- 0-3 km storm-relative helicity
- 44 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS55 KTWC 030215 SVRTUS AZC019-030245- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TUCSON AZ 714 PM MST MON JUL 2 2001 THE NATIONAL WEATHER SERVICE IN TUCSON HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... EAST CENTRAL PIMA COUNTY IN ARIZONA THIS INCLUDES GREEN VALLEY * UNTIL 745 PM MST * AT 704 PM MST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS FROM 10 MILES EAST OF GREEN VALLEY...MOVING WEST AT 10 MPH. * SEVERE THUNDERSTORMS WILL BE NEAR... GREEN VALLEY AT 730 PM MST HIGHWAY 286 NEAR THREE POINTS AT 745 PM WIND GUSTS TO 65 MPH ARE LIKELY...ALONG WITH NEAR ZERO VISIBILITIES IN BLOWING DUST. LAT...LON 3210 11092 3174 11088 3174 11132 3209 11137 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 Jul 2, 6:15 PM MST, 59 minutes earlier.
Area forecast discussion, Jul 2, 6:15 PM MST, 59 minutes before
SOUTHEAST ARIZONA FORECAST DISCUSSION...MESOSCALE UPDATE NATIONAL WEATHER SERVICE TUCSON AZ 615 PM MST MON JUL 2 2001 SYNOPSIS...THE SUMMER THUNDERSTORM SEASON WILL BE IN FULL SWING THIS WEEK AS HIGH PRESSURE REMAINS ANCHORED ALONG THE UTAH BORDER. THIS WILL SEND A SERIES OF UPPER LEVEL DISTURBANCES WESTWARD FROM THE SOUTHERN PLAINS. THUNDERSTORMS OVER THE NEXT SEVERAL DAYS COULD BE QUITE STRONG...WITH THE THREAT OF HEAVY RAIN ALSO INCREASING AS THE WEEK PROGRESSES. DISCUSSION...HAVE UPDATED SEVERAL ZONES TO ACCOUNT FOR RAPID INCREASE IN TSTM ACTIVITY. RECORD HEAT TODAY HAS MANAGED TO GIVE US CAPES AROUND 500 J/KG ON THE 00Z KTUS SOUNDING, DESPITE A LINGERING 1-2C CAP AROUND 400MB. SLIGHT COOLING AT 500MB AND SLIGHT INCREASE IN PRECIP WATERS IS CONTRIBUTING TO THE HIGH-BASED DEVELOPMENT. UNFORTUNATELY, THE DOWNWARD AVAILABLE POTENTIAL ENERGY IS EXTREME, EVEN FOR SE AZ. LFC IS JUST ABOVE THE 00C ISOTHERM, WHICH IS IDEAL FOR DAMAGING MICROBURST WINDS. WELL-DEFINED OUTFLOW BOUNDARY IS RACING SW TOWARD KTUS/KFHU FROM THE NORTHEAST AND COULD ENHANCE TSTM DEVELOPMENT THROUGH 8 PM OR SO. THE PROBLEM WITH THIS SITUATION IS THAT IT'S GOING TO BE DIFFICULT TO CATCH THE MICROBURSTS WITH MUCH LEAD TIME. SWOMCD SUMS THINGS UP NICELY. PYTLAK .TWC...NONE.
In the hours before
Local storm report, Jul 2, 5:54 PM MST, 1 hour 20 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TUCSON ARIZONA
0554 PM MST MON JUL 2 2001
TIME (MST) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0446 PM SAFFORD AZ 62 MPH TSTM GUST
07/02/01 GRAHAM
0504 PM SAFFORD AZ WIND DAMAGE
07/02/01 GRAHAM SIX INCH DIAMETER TREE LIMB BROKEN
BY HIGH WINDSLocal storm report, Jul 2, 7:08 PM MST, 6 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TUCSON ARIZONA
0708 PM MST MON JUL 2 2001
TIME (MST) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0628 PM TUCSON INTL AIRPORT AZ 60 MPH TSTM GUST
07/02/01 PIMA
0640 PM TUCSON AZ WIND DAMAGE
07/02/01 PIMA ROOF DAMAGE FAR SOUTH SIDE OF
TUCSON
0655 PM TUCSON AZ 58 MPH TSTM GUST
07/02/01 PIMA REPORTED BY STORM SOPTTER WITH
ANEMOMETER. VISIBILITY NEAR ZERO
IN BLOWING DUST.The office that day
Everything else NWS Tucson, AZ issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 2, 5:06 PM MST | Severe Thunderstorm Warning | TWC | Graham, Greenlee | 30 min |
| Jul 2, 6:38 PM MST | Severe Thunderstorm Warning | TWC | Pima | 37 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; radar from the NEXRAD Level II archive.