Alert archive / Illinois / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 133, NWS Quad Cities, IA

June 28, 1998Carroll County, Whiteside County, Illinois

NWS Quad Cities, IA issued this severe thunderstorm warning at Jun 28, 1998, 1:56 AM CDT for Carroll County, Whiteside County, Illinois. It was in force for 49 min. 5 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jun 28, 1998, 1:56 AM CDT (06:56 UTC)
Expired: Jun 28, 1998, 2:45 AM CDT
In force: 49 min
Issued by: NWS Quad Cities, IA
Area: Whole counties

Counties Carroll County, IL, Whiteside County, IL

The radar

The Quad Cities radar (KDVN), 64 km from the middle of the area, began a volume at 06:59 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.

What was reported inside it

Time	Report	Where	Remark
Jun 28, 2:15 AM CDT	Thunderstorm Wind	Albany, IL	Power was out across Western Whiteside County after strong thunderstorm winds downed trees and damaged a power transformer.
Jun 28, 2:20 AM CDT	Thunderstorm Wind 65	Mt Carroll, IL	Branches were broken and large trees were uprooted by strong thunderstorm winds across Carroll County during the early morning hours. At Lake Carroll a large oak tree smashed through the patio door of a home and some of the branches punched through the roof o
Jun 28, 2:28 AM CDT	Thunderstorm Wind	Savanna, IL	High winds toppled trees causing minor property damage.
Jun 28, 2:30 AM CDT	Thunderstorm Wind 78	Erie, IL
Jun 28, 2:30 AM CDT	Thunderstorm Wind	Shannon, IL	High winds blew down trees and power lines, and ripped the roof off of a small building. Two people were injured after they were hit by debris.

NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.

The watch it was issued in

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

Issued	Product	Office	Lasted
Jun 28, 12:30 AM CDT	Severe Thunderstorm Watch	SPC	5 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 6.9 hours before the alert went out and 58 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: 4171 J/kg
Mixed-layer CIN: -42 J/kg
Mixed-layer LCL: 1286 m above ground
0-6 km bulk shear: 34 kt
0-1 km storm-relative helicity: 11 m²/s²
0-3 km storm-relative helicity: 103 m²/s²
Significant tornado parameter: 0.5
Supercell composite: 4.1

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 Quad Cities, IA wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 28, 1:42 AM CDT, 14 minutes earlier.

Area forecast discussion, Jun 28, 1:42 AM CDT, 14 minutes before

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In the hours before

Local storm report, Jun 28, 1:18 AM CDT, 38 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
118 AM CDT SUN JUN 28 1998

TIME(CDT)  .....CITY LOCATION.....   ST   ...EVENT/REMARKS...
DATE(CDT)  ....COUNTY LOCATION....

0118 AM    ANAMOSA                   IA   60 TO 70 MPH WIND GUST
06/28/98   JONES

Local storm report, Jun 28, 1:22 AM CDT, 34 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1246 AM CDT SAT JUN 27 1998

TIME(CDT)  .....CITY LOCATION.....   ST   ...EVENT/REMARKS...
DATE(CDT)  ....COUNTY LOCATION....

1d240 AM    MANCHESTER                IA   0.75 INCH HAIL
06/28/98   DELAWARE

0105 AM    DELHI                     IA)  0.75 INCH HAIL
06/28/98   DELAWARE

0105 AM    DELAWARE                  IA   0.75 INCH HAIL
06/27/98   DELAWARE

Local storm report, Jun 28, 1:28 AM CDT, 28 minutes before

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Local storm report, Jun 28, 1:28 AM CDT, 28 minutes before

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Local storm report, Jun 28, 1:54 AM CDT, 2 minutes before

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Local storm report, Jun 28, 1:54 AM CDT, 2 minutes before

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The office that day

Everything else NWS Quad Cities, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jun 27, 11:44 PM CDT	Severe Thunderstorm Warning	DVN	Buchanan	46 min
Jun 28, 12:11 AM CDT	Severe Thunderstorm Warning	DVN	Benton	64 min
Jun 28, 12:20 AM CDT	Severe Thunderstorm Warning	DVN	Delaware	65 min
Jun 28, 12:26 AM CDT	Severe Thunderstorm Warning	DVN	Buchanan	19 min
Jun 28, 12:43 AM CDT	Severe Thunderstorm Warning	DVN	Iowa, Linn	62 min
Jun 28, 12:59 AM CDT	Severe Thunderstorm Warning	DVN	Dubuque	66 min
Jun 28, 1:06 AM CDT	Severe Thunderstorm Warning	DVN	Cedar, Johnson	64 min
Jun 28, 1:11 AM CDT	Severe Thunderstorm Warning	DVN	Keokuk	64 min
Jun 28, 1:14 AM CDT	Severe Thunderstorm Warning	DVN	Jones	51 min
Jun 28, 1:26 AM CDT	Severe Thunderstorm Warning	DVN	Jackson	49 min
Jun 28, 1:35 AM CDT	Severe Thunderstorm Warning	DVN	Clinton, Muscatine, Scott	65 min
Jun 28, 1:38 AM CDT	Severe Thunderstorm Warning	DVN	Washington	52 min
Jun 28, 1:40 AM CDT	Severe Thunderstorm Warning	DVN	Jo Daviess	50 min
Jun 28, 2:02 AM CDT	Severe Thunderstorm Warning	DVN	Rock Island	48 min
Jun 28, 2:13 AM CDT	Severe Thunderstorm Warning	DVN	Stephenson	47 min
Jun 28, 2:30 AM CDT	Severe Thunderstorm Warning	DVN	Henry	50 min
Jun 28, 2:40 AM CDT	Severe Thunderstorm Warning	DVN	Bureau	50 min
Jun 28, 2:43 AM CDT	Severe Thunderstorm Warning	DVN	Whiteside	37 min
Jun 28, 2:49 AM CDT	Severe Thunderstorm Warning	DVN	Henry	36 min
Jun 28, 3:10 AM CDT	Severe Thunderstorm Warning	DVN	Putnam	35 min
Jun 28, 5:20 PM CDT	Severe Thunderstorm Warning	DVN	Hancock	65 min
Jun 28, 6:17 PM CDT	Tornado Warning	DVN	Hancock	48 min
Jun 28, 6:37 PM CDT	Tornado Warning	DVN	McDonough	63 min

Nearby

Severe Thunderstorm Warnings in Illinois, 1998 Every severe thunderstorm warning in 1998

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.