Illinois, 2002

Damaging Wind in Illinois, August 21, 2002

August 21, 2002 · NWS DVN · 1 event in 1 county or zone

1 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
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 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 Quad Cities, IA wrote its last area forecast discussion before the first event at Aug 21, 12:51 PM CST, 4 hours 9 minutes earlier.

Area forecast discussion, Aug 21, 12:51 PM CST, 4 hours 9 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
151 PM CDT WED AUG 21 2002

SYNOPSIS...
MORNING UA AND SURFACE ANALISIS SHOWS THE AREA IS NOW IN THE WARM AND
MOIST SECTOR.  THE SURFACE WARM FRONT AT 15Z EXTENDS FROM NEAR FSD TO
ALO TO VYS.  WELL DEFINED SHORT WAVE JUST WEST OF MCI AT 12Z...NOW
APPROACHING THE UPPER MIDWEST FROM THE SOUTHWEST.  THIS WAVE HAS
SPAWNED OVERNIGHT CONVECTION FROM KANSAS THROUGH NORTHWEST IOWA.  MUCH
OF THIS IS NOW DECAYING AS EXPECTED...WITH THE EXCEPTION OF PORTION
NEAR MCI.  THIS WILL BE THE CONVECTIVE CLUSTER TO WATCH AS IT
APPROACHES THE CWA THIS AFTERNOON.  CIRRUS AND DEBRIS CLOUDS CONTINUE
TO SLOWLY THIN NORTH OF INTERSTATE 80...WITH MODERATED INSOLATION
ALREADY IN PLACE SOUTH OF THE INTERSTATE.  THIS WILL ALLOW ADEQUATE
HEATING FOR STORMS TO INTENSIFY IN OUR AREA THIS AFTERNOON.

SHORT TERM...
SEVERE WEATHER THREAT WILL MAINLY AFFECT THE AREA THIS EVENING...WITH
HEAVY RAIN EXPECTED LATE EVENING AND OVERNIGHT.  PWAT VALUES IN EXCESS
OF TWO INCHES NOTED ON THE OMA 12Z SOUNDING AND NEAR 2 INCHES ON 18Z
DVN SOUNDING...SHOW TROPICAL AIRMASS OVER THE REGION.  DESPITE MODEL
DIFFERENCES...ALL SHORT TERM MODELS INDICATE DIFFLUENT THICKNESS OVER
THE CWA TONIGHT THROUGH THURSDAY MORNING.  TRAINING CELLS APPEAR TO BE
LIKELY GIVEN NEARY STATIONARY BOUNDARY OVER THE CWA.  ALL THIS SAID...
COUNTY FFG GUIDANCE VALUES ARE RUNNING RATHER HIGH AND CROPS ARE MATURE.
 THEREFORE I FEEL WIDESPREAD FLOODING PROBLEMS DO NOT WARRANT A FLOOD
WATCH AT THIS TIME. URBAN FLOODING MAY BECOME AN ISSUE...IF STORMS PICK
ON ONE AREA REPEATEDLY.  THE FRONT BECOMES QUASI-STATIONARY THURSDAY AND
FRIDAY...WITH SEVERAL ROUNDS OF HEAVY RAIN AND THUNDESTORMS EXPECTED
THROUGH FRIDAY NIGHT.  IF HEAVY RAIN DOES MATERIALIZE TONIGHT...A FLOOD
WATCH MAY BE NEEDED FOR THURSDAY NIGHT AND FRIDAY FOR AREAS THAT RECIEVE
HEAVY RAIN TONIGHT.

EXTENDED...
NO MAJOR CHANGES EXPECTED IN EXTENDED AS CANADIAN HIGH SETTLES SOUTH
ACROSS THE AREA FOR SEVERAL DAYS OF PLEASANT WEATHER.  MRF AND UKMET
CONTINUE TO INDICATE A LOBE UPPER LEVEL VORTICITY WORKING SOUTH
ACROSS THE AREA MONDAY.  FOR NOW...I WILL NOT CHANGES THE GOING
FORECAST...BUT SHOWERS MAY NEED TO BE ADDED IF THIS FEATURE MOVES OVER
THE AREA DURING PEAK HEATING.  OTHERWISE...DRY WEATHER WILL CONTINUE
THROUGH WEDNESDAY...WITH SLOWLY MODERATING TEMPERATURES.

.DVN...
IA...NONE.
IL...NONE.
MO...NONE.

ERVIN/DVN LAST/OMA NEXT

In the hours before

Local storm report, Aug 21, 2:36 PM CST, 2 hours 24 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
336 PM CDT WED AUG 21 2002

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0324 PM    12 E FAIRBANK             IA   50-55 MPH TSTM GUST
08/21/02   BUCHANAN                       WIND SPEEDS ESTIMATED.
                                          REPORTED BY STORM
                                          SPOTTER.
Local storm report, Aug 21, 3:05 PM CST, 1 hour 55 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
405 PM CDT WED AUG 21 2002

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0400 PM    WELLMAN                   IA   WIND DAMAGE
08/21/02   WASHINGTON                     LARGE TREES DOWNED DUE
                                          TO VERY HIGH WINDS.
                                          REPORTED BY LAW
                                          ENFORCEMENT OFFICIAL.
Local storm report, Aug 21, 4:04 PM CST, 56 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
504 PM CDT WED AUG 21 2002

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0459 PM    2 S OXFORD JCT            IA   51 MPH TSTM GUST
08/21/02   JONES                          WIND SPEEDS MEASURED.
                                          SMALL BRACHES BLOWN
                                          DOWN.  REPORTED BY
                                          STORM SPOTTER.

The radar

The Quad Cities radar (KDVN), 106 km away, was scanning. The volume nearest the first event began at 23:00 UTC.

Open the radar archive at this moment

Event by event

1 thunderstorm wind. Local standard time, as filed.

Thunderstorm Wind, Jo Daviess

When
August 21, 5:00 PM CST
Where
Jo Daviess County, Apple River
Measured
57 kt (66 mph)
Reported by
OFFICIAL NWS OBS.
Coordinates
42.500, -90.100

Several large trees, at least 2 feet in diameter, blown down in Apple River Canyon State Park.

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 Illinois in 2002Every state in 2002This day in weather historyWarnings in Illinois, August 2002

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: 5312846.