Damaging Winds in Wisconsin, August 2, 2004

Name: Damaging Winds in Wisconsin, August 2, 2004
Start: 2004-08-02T06:30
End: 2004-08-02T06:52
Location: Wisconsin

August 2, 2004 · NWS MPX · 2 events in 1 county or zone

2 thunderstorm wind, as filed by the National Weather Service.

Where it happened

Every event with a place to put it. Tap one for its entry below.

Tornadoes
Tropical storms and surge
Floods
Wind
Hail
Winter weather
Heat and drought
Cold
Fire, smoke and dust
Marine and coastal
Other

Open the live radar over this ground

The toll

Deaths: 0
Injuries: 0
Property damage: None recorded
Crop damage: None recorded
Events: 2

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 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 Twin Cities, MN wrote its last area forecast discussion before the first event at Aug 2, 2:15 AM CST, 4 hours 15 minutes earlier.

Area forecast discussion, Aug 2, 2:15 AM CST, 4 hours 15 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
315 AM CDT MON AUG 2 2004

.DISCUSSION...
SD WIND EVENT NOT PICKED UP BY GUIDANCE...HWVR SIGNIFICANT WEAKENING
IN LAST HOUR HAS TAKEN PLACE AS IT MOVES INTO MORE STABLE
CONDITIONS.  BOTH ETA/GFS SHOW MID LEVEL WIND MAX OF 40KTS ADVANCING
ACRS CENTRAL MN RAPIDLY THIS MRNG...TIED INTO WEAK SHORT WAVE TROUGH
FROM WV IMAGERY.  LIGHTNING ACTIVITY HAS BEEN RAPIDLY INCREASING
ALONG WITH COOLING CLOUD TOPS AS SOUTHERN WIND EVENT WEAKENS.  MAY
BE A DEVELOPING WIND EVENT AS MENTIONED IN SPC WATCH DISCUSSION AS
MANY POINTS FROM SYNOPTIC CLIMATOLOGY FOR DERECHOS REACHED THIS
MRNG.  HENCE MENTIONED POTENTIAL FOR SVR FARTHER SOUTH OF WATCH BOX
THIS MRNG ALG WITH SCT OR LKLY POPS.  TSTM COMPLEX SHUD PUSH SOUTH
OF AREA BY 18Z...HWVR UNSTABLE ATMOS EXPCD TO REDEVELOP THIS AFTN
WITH DEWPTS IN THE 70 TO 75 DEGREE RANGE.  LACK OF SYNOPTIC SCALE
FORCING BUT LINGERING WEAK BOUNDARY IN THE AREA SO WL CONT WITH LOW
POPS.

MODELS DIVERGE ON HANDLING OF UPSTREAM ID S/W TROF FOR LATER TONIGHT
INTO TUE.  GFS MUCH MORE AGGRESSIVE WITH FARTHERN NORTH BOUNDARY AND
PRECIP ACRS SRN MN WHILE ETA FARTHER SOUTH.  HWVR CANADIAN FAVORING
FARTHER NORTH SCENARIO SO WL CONT WITH SLIGHTLY HIGHER POPS IN SRN
AREAS.  DAY SHIFT WL NEED TO REEVALUATE.  IF GFS SOLUTION LOOKS
REASONABLE...MAY BE A FLOODING THREAT WITH POTENTIAL TRAINING IN SRN
FORECAST AREA.  AFTER FINAL S/W POTENTIAL TUE NGT...STILL LOOKS LIKE
DRIER NLY FLOW SHOULD PUSH MAIN ACTION AREA TO SOUTH FOR MOST OF WED.

ALL LONG TERM MODELS IN CLOSE AGREEMENT WITH OMEGA BLOCK PATTERN
(STAGNANT WEATHER PATTERN) ENFORCED OVER THE WESTERN TWO THIRDS OF
THE NATION. UPPER HIGH PRESSURE RIDGE WILL REMAIN ENTRENCH OVER THE
UPPER MIDWEST WITH LITTLE IN THE WAY OF PRECIP UNTIL EARLY NEXT
WEEK.

&&

MPX WATCHES/WARNINGS/ADVISORIES...
MN...NONE.
WI...NONE.

&&

MBK/JVM

Hazardous weather outlook, Aug 2, 4:15 AM CST, 2 hours 15 minutes before

HAZARDOUS WEATHER OUTLOOK...CORRECTED
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
515 AM CDT MON AUG 2 2004

MNZ047>049-051-054>070-073>078-082>085-091>093-WIZ023>028-031000-
ANOKA-BLUE EARTH-BROWN-CARVER-CHIPPEWA-DAKOTA-DUNN-EAU CLAIRE-
FARIBAULT-FREEBORN-GOODHUE-HENNEPIN-KANDIYOHI-LAC QUI PARLE-LE SUEUR-
MARTIN-MCLEOD-MEEKER-NICOLLET-PEPIN-PIERCE-POPE-RAMSEY-REDWOOD-
RENVILLE-RICE-SCOTT-SHERBURNE-SIBLEY-ST CROIX-STEARNS-STEELE-STEVENS-
SWIFT-WASECA-WASHINGTON-WATONWAN-WRIGHT-YELLOW MEDICINE-
500 AM CDT MON AUG 2 2004

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL AND SOUTH
CENTRAL MINNESOTA AND WEST CENTRAL WISCONSIN.

.DAY ONE...TODAY AND TONIGHT

SCATTERED THUNDERSTORMS ARE LIKELY TODAY...ESPECIALLY THROUGH THE
BALANCE OF THE MORNING OVER WEST CENTRAL...SOUTH CENTRAL AND
EAST CENTRAL MINNESOTA. THUNDERSTORMS WILL BECOME MORE LIKELY OVER
WEST CENTRAL WISCONSIN DURING THE LATE MORNING AND AFTERNOON HOURS.
A FEW STORMS COULD BECOME SEVERE WITH LARGE HAIL AND DAMAGING WINDS
THE MAIN SEVERE WEATHER THREATS.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SKYWARN SPOTTER ACTIVATION MAY BE NEEDED TODAY.

MNZ041>045-050-052-053-WIZ014>016-031000-
BARRON-BENTON-CHISAGO-DOUGLAS-ISANTI-KANABEC-MILLE LACS-MORRISON-
POLK-RUSK-TODD-
515 AM CDT MON AUG 2 2004

THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF CENTRAL MINNESOTA
AND WEST CENTRAL WISCONSIN.

.DAY ONE...TODAY AND TONIGHT

SCATTERED THUNDERSTORMS WILL OCCUR TODAY INTO THE EARLY EVENING
HOURS. THE STRONGER STORMS MAY PRODUCE SOME HAIL AND WIND GUSTS
NEAR 50 MPH.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

NO HAZARDOUS WEATHER IS EXPECTED AT THIS TIME.

.SPOTTER INFORMATION STATEMENT...

SKYWARN SPOTTER ACTIVATION MAY BE NEEDED TODAY.

In the hours before

Local storm report, Aug 2, 4:57 AM CST, 1 hour 33 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
557 AM CDT MON AUG 02 2004

..TIME...   ...EVENT...     ...CITY LOCATION...      ...LAT.LON...
..DATE...   ....MAG....     ..COUNTY LOCATION...ST.. ...SOURCE....
            ..REMARKS..

0545 AM     HAIL             ELROSA                  45.56N 94.95W
08/02/2004  0.75 INCH        STEARNS            MN   TRAINED SPOTTER

&&

JVM

Local storm report, Aug 2, 5:53 AM CST, 37 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
653 AM CDT MON AUG 02 2004

..TIME...   ...EVENT...     ...CITY LOCATION...      ...LAT.LON...
..DATE...   ....MAG....     ..COUNTY LOCATION...ST.. ...SOURCE....
            ..REMARKS..

0652 AM     HAIL             5 N EVANSVILLE          46.08N 95.68W
08/02/2004  0.75 INCH        DOUGLAS            MN   TRAINED SPOTTER

&&

MBK

The radar

The Minneapolis radar (KMPX), 94 km away, was scanning. The volume nearest the first event began at 12:27 UTC.

Open the radar archive at this moment

Event by event

2 thunderstorm wind. Local standard time, as filed.

Thunderstorm Wind, Polk

When: August 2, 6:30 AM CST
Where: Polk County, St Croix Falls
Measured: 52 kt (60 mph) estimated gust
Reported by: LAW ENFORCEMENT
Coordinates: 45.400, -92.650

Trees were downed.

Thunderstorm Wind, Polk

When: August 2, 6:52 AM CST
Where: Polk County, Amery
Measured: 52 kt (60 mph) estimated gust
Reported by: EMERGENCY MANAGER
Coordinates: 45.317, -92.367

Power lines were blown down onto County Road F west of town. Trees were downed in town.

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

Every storm in Wisconsin in 2004 Every state in 2004 This day in weather history Warnings in Wisconsin, August 2004

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: 5418822, 5418823.