Illinois, 1999

Damaging Winds and High Wind in Illinois, February 11, 1999

February 11, 1999 · NWS LOT · 10 events in 9 counties and zones

Very strong winds occurred in the wake of a small line of thunderstorms. Trees were blown down around Watseka and a barn was damaged in the southwest part of Iroquois County.

Where it happened

Every event with a place to put it; 2 filed by county or forecast zone are drawn at its center, in a lighter ring. Tap one for its entry below.

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The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
10

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 LOT wrote it up.

Very strong winds occurred in the wake of a small line of thunderstorms. Trees were blown down around Watseka and a barn was damaged in the southwest part of Iroquois County. The brick facade of a building was blown down in Watseka. A wind gusts of 68 mph was recorded in Watseka at 410 pm and 66mph was recorded by an observer in Bonfield at 427 pm. These wind gusts may have been stronger that the winds that occurred in thunderstorms about 30 to 60 minutes earlier.

The radar

The Quad Cities radar (KDVN), 95 km away, was scanning. The volume nearest the first event began at 20:00 UTC.

Open the radar archive at this moment

Event by event

8 thunderstorm wind, 2 high wind. Local standard time, as filed.

Thunderstorm Wind, Lee

When
February 11, 2:00 PM CST
Where
Lee County, Dixon
Measured
52 kt (60 mph)
Reported by
LAW ENFORCEMENT
Coordinates
41.830, -89.480

A tree blew down on a house in Dixon. A wind gust to 60 mph was reported at Compton Airport.

Thunderstorm Wind, Ogle

When
February 11, 2:20 PM CST
Where
Ogle County, Byron
Measured
50 kt (58 mph)
Reported by
NEWSPAPER
Coordinates
42.130, -89.250

Tree limbs and wires were downed near Byron and Mt. Morris.

Thunderstorm Wind, Winnebago

When
February 11, 2:30 PM CST
Where
Winnebago County, Rockford
Measured
59 kt (68 mph)
Reported by
AWOS,ASOS,MESONET,ETC
Coordinates
42.270, -89.080

Tree limbs and power lines were downed in Rockford, Loves Park and New Milford. A trailer was crushed by a falling tree.

Thunderstorm Wind, De Kalb

When
February 11, 2:45 PM CST
Where
De Kalb County, De Kalb
Measured
50 kt (58 mph)
Reported by
LAW ENFORCEMENT
Coordinates
41.930, -88.750

Trees were blown down.

Thunderstorm Wind, Boone

When
February 11, 2:45 PM CST
Where
Boone County, Poplar Grove
Measured
50 kt (58 mph)
Reported by
LAW ENFORCEMENT
Coordinates
42.370, -88.830

A maintenance building at highway 76 and 173 was damaged by thunderstorm winds.

Thunderstorm Wind, McHenry

When
February 11, 3:00 PM CST
Where
McHenry County, Woodstock
Measured
50 kt (58 mph)
Reported by
LAW ENFORCEMENT
Coordinates
42.320, -88.450

Shingles were blown off a house and tree limbs were blown down in Woodstock and Lake in the Hills.

Thunderstorm Wind, Kankakee

When
February 11, 3:45 PM CST
Where
Kankakee County, Aroma Park
Measured
50 kt (58 mph)
Reported by
NEWSPAPER
Coordinates
41.080, -87.800

A storage building was damaged in Aroma Park. The roof of an industrial building was damaged in Bradley.

Thunderstorm Wind, Will

When
February 11, 3:50 PM CST
Where
Will County, Peotone
Measured
50 kt (58 mph)
Reported by
NEWSPAPER
Coordinates
41.330, -87.780

A greenhouse was damaged at Peotone. Tree limbs and power lines were blown down in Monee.

High Wind, Iroquois

When
February 11, 4:00 PM CST to 5:00 PM CST
Where
Iroquois forecast zone
Measured
59 kt (68 mph)
Reported by
NEWSPAPER
Coordinates
40.747, -87.824 (the zone’s center; the record gives no point)

High Wind, Kankakee

When
February 11, 4:00 PM CST to 5:00 PM CST
Where
Kankakee forecast zone
Measured
59 kt (68 mph)
Reported by
NEWSPAPER
Coordinates
41.138, -87.862 (the zone’s center; the record gives no point)

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.
High Wind
Sustained non-thunderstorm winds of 40 mph or more for an hour, or gusts of 58 mph or more.

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

The same day elsewhere

More

Every storm in Illinois in 1999Every state in 1999This day in weather historyWarnings in Illinois, February 1999

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: 5680973, 5680972, 5680971, 5680974, 5681067, 5681064, 5681065, 5681066, 5681068, 5681069.