Alert archive / Illinois / Severe Thunderstorm Warnings in 2008

Severe Thunderstorm Warning 32, NWS Chicago, IL

May 30, 2008Ford County, Iroquois County, Livingston County, Illinois

NWS Chicago, IL issued this severe thunderstorm warning at May 30, 2008, 3:13 PM CDT for Ford County, Iroquois County, Livingston County, Illinois. It was in force for 47 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 30, 2008, 3:13 PM CDT (20:13 UTC)
Expired: May 30, 2008, 4:00 PM CDT
In force: 47 min
Issued by: NWS Chicago, IL
Area: Storm-based polygon

Counties Ford County, IL, Iroquois County, IL, Livingston County, IL

The radar

The Chicago radar (KLOT), 96 km from the middle of the area, began a volume at 20:13 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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 30, 1:56 PM CDT	Tornado Watch	SPC	8 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 12:00Z, 8.2 hours before the alert went out and 74 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 57 J/kg
Mixed-layer CIN: -325 J/kg
Mixed-layer LCL: 1164 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 128 m²/s²
0-3 km storm-relative helicity: 106 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

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 Chicago, IL wrote its last area forecast discussion before this severe thunderstorm warning went out at May 30, 3:09 PM CDT, 4 minutes earlier.

Area forecast discussion, May 30, 3:09 PM CDT, 4 minutes before

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Hazardous weather outlook, May 30, 1:47 PM CDT, 1 hour 26 minutes before

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In the hours before

Local storm report, May 30, 1:13 PM CDT, 2 hours before

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Local storm report, May 30, 1:26 PM CDT, 1 hour 47 minutes before

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Local storm report, May 30, 1:38 PM CDT, 1 hour 35 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
138 PM CDT FRI MAY 30 2008

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

1145 AM     NON-TSTM WND DMG WAUKEGAN                42.37N 87.87W
05/30/2008                   LAKE               IL   AMATEUR RADIO

            ESTIMATED WIND GUSTS OF 55 MPH WITH TREES AND LARGE
            BRANCHES DOWN NEAR LEWIS AVENUE.

&&

RODRIGUEZ

Local storm report, May 30, 2:14 PM CDT, 59 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
214 PM CDT FRI MAY 30 2008

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

1015 AM     NON-TSTM WND DMG 3 E ROCKFORD            42.27N 89.00W
05/30/2008                   WINNEBAGO          IL   TRAINED SPOTTER

            LARGE TREE DOWN ACROSS WOODLAND DRIVE.

&&

RODRIGUEZ

Local storm report, May 30, 2:27 PM CDT, 46 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
227 PM CDT FRI MAY 30 2008

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

1015 AM     NON-TSTM WND DMG 3 E ROCKFORD            42.27N 89.00W
05/30/2008                   WINNEBAGO          IL   TRAINED SPOTTER

            LARGE TREE DOWN ACROSS WOODLAND DRIVE.

1015 AM     NON-TSTM WND DMG ROCKFORD                42.27N 89.06W
05/30/2008                   WINNEBAGO          IL   EMERGENCY MNGR

            ROOF BLOWN OFF A BUILDING AT ROCKFORD AIRPORT.

1015 AM     NON-TSTM WND GST ROCKFORD AIRPORT        42.20N 89.10W
05/30/2008  M63.00 MPH       WINNEBAGO          IL   ASOS

            MEASURED WINDS HAVE BEEN CONTINUOUSLY BETWEEN 45 AND 55
            KNOTS FOR OVER 15 MINUTES NOW. EVENT CONTINUES AS OF 1033
            AM CDT.

1045 AM     NON-TSTM WND DMG 2 SE MCHENRY            42.32N 88.26W
05/30/2008                   MCHENRY            IL   TRAINED SPOTTER

            WIND GUSTS UP TO AROUND 40 MPH WITH TREE LIMBS AND POWER
            LINES DOWN.

1050 AM     NON-TSTM WND GST ISLAND LAKE             42.28N 88.20W
05/30/2008  M64.00 MPH       MCHENRY            IL   MESONET

1055 AM     NON-TSTM WND DMG ROCKFORD                42.27N 89.06W
05/30/2008                   WINNEBAGO          IL   TRAINED SPOTTER

            SMALL LIMBS DOWN NEAR INTERSECTION OF I90 AND BUSINESS
            US-20.

1055 AM     NON-TSTM WND DMG WOODSTOCK               42.31N 88.44W
05/30/2008                   MCHENRY            IL   TRAINED SPOTTER

            MEASURED WIND GUST OF 57 MPH WITH 4 FOOT IN DIAMETER TREE
            DOWN AND MULTIPLE POWER LINES DOWN.

1100 AM     NON-TSTM WND GST 6 SSE BEACH PARK        42.35N 87.81W
05/30/2008  M58.00 MPH       LMZ740             IL   C-MAN STATION

1100 AM     NON-TSTM WND DMG WOODSTOCK               42.31N 88.44W
05/30/2008                   MCHENRY            IL   TRAINED SPOTTER

            TREE ON HOUSE NEAR BIRCH AND JULIE STREET. INJURIES
            REPORTED.

1100 AM     NON-TSTM WND DMG WOODSTOCK               42.31N 88.44W
05/30/2008                   MCHENRY            IL   TRAINED SPOTTER

            UNKNOWN AMOUNT OF INJURIES ASSOCIATED WITH FALLING DEBRIS
            NEAR INTERSECTION OF KISHWAUKEE VALLEY AND ROSE FARM
            STREET.

1100 AM     NON-TSTM WND DMG WOODSTOCK               42.31N 88.44W
05/30/2008                   MCHENRY            IL   TRAINED SPOTTER

            LIGHTPOLE IN INTERSECTION OF RT. 47 AND RT. 120.

1100 AM     NON-TSTM WND DMG WOODSTOCK               42.31N 88.44W
05/30/2008                   MCHENRY            IL   TRAINED SPOTTER

            TREE ON HOUSE NEAR BIRCH AND JULIE STREET.

1102 AM     NON-TSTM WND GST MUNDELEIN               42.27N 88.00W
05/30/2008  M51.00 MPH       LAKE               IL   EMERGENCY MNGR

1110 AM     NON-TSTM WND DMG LIBERTYVILLE            42.28N 87.97W
05/30/2008                   LAKE               IL   TRAINED SPOTTER

            TREE DOWN ON ELLIS AVENUE AT WINCHESTER RD.

1110 AM     NON-TSTM WND DMG MARENGO                 42.25N 88.60W
05/30/2008                   MCHENRY            IL   TRAINED SPOTTER

            LARGE TREE DOWN NEAR FOREST ST. AND HWY 23.

1132 AM     NON-TSTM WND DMG MARENGO                 42.25N 88.60W
05/30/2008                   MCHENRY            IL   TRAINED SPOTTER

            OVERTURNED SEMI ON RT. 20 AND I90.

1136 AM     NON-TSTM WND GST ROCHELLE                41.92N 89.06W
05/30/2008  M53.00 MPH       OGLE               IL   AWOS

            REPORT FROM ROCHELLE AIRPORT.

1145 AM     NON-TSTM WND DMG WAUKEGAN                42.37N 87.87W
05/30/2008                   LAKE               IL   AMATEUR RADIO

            ESTIMATED WIND GUSTS OF 55 MPH WITH TREES AND LARGE
            BRANCHES DOWN NEAR LEWIS AVENUE.

1145 AM     NON-TSTM WND GST GURNEE                  42.38N 87.94W
05/30/2008  M61.00 MPH       LAKE               IL   MESONET

            MEASURED AT SCHOOL MESONET.

1153 AM     NON-TSTM WND DMG MALTA                   41.93N 88.86W
05/30/2008                   DE KALB            IL   LAW ENFORCEMENT

            TREES DOWN.

1155 AM     NON-TSTM WND GST DE KALB                 41.93N 88.75W
05/30/2008  M52.00 MPH       DE KALB            IL   AWOS

            MEASURED AT DE KALB AIRPORT.

1200 PM     NON-TSTM WND DMG STREAMWOOD              42.02N 88.17W
05/30/2008                   COOK               IL   TRAINED SPOTTER

            ESTIMATED 55 MPH GUSTS WITH SMALL TREE LIMBS DOWN.

1200 PM     NON-TSTM WND GST 2 E CHICAGO             41.88N 87.59W
05/30/2008  M58.00 MPH       LMZ741             IL   C-MAN STATION

            MEASURED AT HARRISON-DEVER CRIB.

&&
EVENT IS ONGOING AND REPORTS MAY BE ADDED LATER AS THEY ARE RECEIVED.

RODRIGUEZ

Local storm report, May 30, 2:46 PM CDT, 27 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
246 PM CDT FRI MAY 30 2008

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

1130 AM     NON-TSTM WND DMG LIBERTYVILLE            42.28N 87.97W
05/30/2008                   LAKE               IL   AMATEUR RADIO

            ESTIMATED WIND GUST 55MPH. 30 FOOT TREE DOWN ACROSS POWER
            LINES NEAR RT. 137 AND DES PLAINES RIVER.

&&

WOJTOWICZ

The office that day

Everything else NWS Chicago, IL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 30, 10:25 AM CDT	High Wind Warning	LOT	Boone, DeKalb, DuPage, Kane, Lake, Lee and 3 more	3 hr
May 30, 10:38 AM CDT	Special Marine Warning	LOT		2 hr
May 30, 11:12 AM CDT	Special Marine Warning	LOT		2 hr
May 30, 3:31 PM CDT	Areal Flood Advisory	LOT	Ford, Iroquois, Lee, Livingston, Ogle, Winnebago	14 days
May 30, 3:37 PM CDT	Severe Thunderstorm Warning	LOT	Ford	38 min
May 30, 4:02 PM CDT	Severe Thunderstorm Warning	LOT	Iroquois	58 min
May 30, 4:10 PM CDT	Flash Flood Warning	LOT	Ford, Iroquois, Livingston	6 hr
May 30, 4:36 PM CDT	Severe Thunderstorm Warning	LOT	Iroquois	54 min
May 30, 5:04 PM CDT	Severe Thunderstorm Warning	LOT	DeKalb, Kane	37 min
May 30, 6:13 PM CDT	Severe Thunderstorm Warning	LOT	Iroquois	32 min
May 30, 6:43 PM CDT	Severe Thunderstorm Warning	LOT	Grundy, Kankakee, Will	61 min
May 30, 1:50 PM CDT	Severe Thunderstorm Warning	LOT	Jasper, Porter	15 min
May 30, 5:16 PM CDT	Flash Flood Warning	LOT	Benton	6 hr
May 30, 6:51 PM CDT	Areal Flood Advisory	LOT	Benton, Jasper, Newton	14 days

Nearby

Severe Thunderstorm Warnings in Illinois, 2008 Every severe thunderstorm warning in 2008

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.