Arizona, 2001

Damaging Wind in Arizona, June 20, 2001

June 20, 2001 · NWS TWC · 1 event in 1 county or zone

A severe thunderstorm produced damaging winds that brought trees and power poles down on the east side of Tucson. Down trees damaged two cars and portions of a roof from a 4th story building were blown off due to the strong winds.

Where it happened

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The toll

Deaths
0
Injuries
0
Property damage
$30,000
Crop damage
None recorded
Events
1

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS TWC wrote it up.

A severe thunderstorm produced damaging winds that brought trees and power poles down on the east side of Tucson. Down trees damaged two cars and portions of a roof from a 4th story building were blown off due to the strong winds.

What forecasters said that day

The local office's own words before the first event, 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 the first event at Jun 20, 2:55 PM MST, 3 hours earlier.

Area forecast discussion, Jun 20, 2:55 PM MST, 3 hours before
SOUTHEAST ARIZONA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TUCSON AZ
255 PM MST WED JUN 20 2001

SYNOPSIS...HIGH PRESSURE HAS FOUND ITS HOME OVER SOUTHERN ARIZONA
AND WILL REMAIN OVER THE STATE FOR AT LEAST THE NEXT SEVERAL DAYS.
MOISTURE WORKING ITS WAY WEST ALONG THE MEXICO BORDER WILL CONTINUE
TO PROVIDE THE FUEL FOR AFTERNOON THUNDERSTORMS EACH DAY THIS WEEK.

DISCUSSION...PRECIPITABLE WATER VALUES REMAIN QUITE GOOD ACROSS THE
CWA TODAY. SOUNDINGS INDICATE 1.17 IN IN TUCSON...1.11 IN PHOENIX
AND 1.09 IN IN YUMA. THE TONGUE OF MOISTURE BETWEEN TUCSON AND YUMA
DEPICTED WELL ON GOES IMAGERY. THE 12Z ETA IS THE MODEL OF CHOICE
TODAY. IT APPEARS TO HAVE A BETTER HANDLE ON THE VORTICITY FIELD
WHEN OVERLAID ATOP OF THE H20 VAPOR IMAGE.

STILL LOOKS LIKE BEST ACTIVITY THIS EVENING WILL OCCUR TO THE SE OF
TUCSON WHERE A WEAK COL IN THE 700 MB FLOW WILL OPEN UP. THIS IS
ALSO SEEN IN THE ETA H7 OMEGA FIELD. STILL AM WAVERING WHETHER TO
PUT ISOLATED OR SCATTERED WORDING OUT EAST FOR TONIGHT.

EXPECT A SLIGHT RAMP UP IN THUNDERSTORM ACTIVITY LATE THU AFTERNOON
AND EVENING OVER SE AZ. THE ETA HAS A H3 SPEED DIVERGENCE MAX OVER
SONORA BY 00Z FRI...THEN PUSHES NORTHWARD INTO THE SOUTHERN FRINGES
OF OUR CWA BY 06Z. CURRENT MOISTURE ACROSS THE REGION SHOULD STICK
AROUND FOR TOMORROW...HELPING TO FUEL STORM DEVELOPMENT.
OTHERWISE...THE H5 RIDGE WILL CONTINUE TO BUILD NORTHWARD THROUGH
TOMORROW AND THEN SHIFT EAST FRIDAY...IN RESPONSE TO A UPPER LOW
MOVING INTO THE PACIFIC NORTHWEST. THIS WILL ALLOW FOR A FAVORABLE
SOUTHEAST FLOW TO PUSH ADDITIONAL MOISTURE INTO THE CWA THIS
WEEKEND. WILL OPT TO KEEP THE MENTION OF AFTERNOON AND EVENING
THUNDERSTORMS IN FAR SE AZ THRU MID NEXT WEEK. TEMPERATURES WILL
CONTINUE TO BE MODERATED BY THE INCREASED MOISTURE IN THE REGION...
THEREFORE NOT MUCH CHANGE IN TEMPS THROUGH WED.

.TWC...NONE.

The radar

The national radar mosaic for the moment the first event began.

Open the radar archive at this moment

Event by event

1 thunderstorm wind. Local standard time, as filed.

Thunderstorm Wind, Pima

When
June 20, 5:55 PM MST to 6:20 PM MST
Where
Pima County, Tucson
Property damage
$30,000
Reported by
TRAINED SPOTTER
Coordinates
32.233, -110.933

What these are

Thunderstorm Wind
Winds from a thunderstorm of 50 knots (58 mph) or more, or lower winds that caused damage or casualties. Measured gusts are marked MG, estimated EG.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Arizona in 2001Every state in 2001This day in weather historyWarnings in Arizona, June 2001

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 5251272.