Alert archive / Illinois / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 141, NWS Quad Cities, IA

June 28, 1998Hancock County, Illinois

NWS Quad Cities, IA issued this severe thunderstorm warning at Jun 28, 1998, 5:20 PM CDT for Hancock County, Illinois. It was in force for 65 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: Jun 28, 1998, 5:20 PM CDT (22:20 UTC)
Expired: Jun 28, 1998, 6:25 PM CDT
In force: 65 min
Issued by: NWS Quad Cities, IA
Area: Whole counties

County Hancock County, IL

The radar

The Quad Cities radar (KDVN), 143 km from the middle of the area, began a volume at 22:20 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 nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 10.3 hours before the alert went out and 146 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: 516 J/kg
Mixed-layer CIN: -304 J/kg
Mixed-layer LCL: 947 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 80 m²/s²
0-3 km storm-relative helicity: 174 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 6.5

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, 1:06 PM CDT, 4 hours 14 minutes earlier.

Area forecast discussion, Jun 28, 1:06 PM CDT, 4 hours 14 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, 1:56 AM CDT	Severe Thunderstorm Warning	DVN	Carroll, Whiteside	49 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, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.