Alert archive / Illinois / Severe Thunderstorm Warnings in 2022

Severe Thunderstorm Warning 145, NWS Quad Cities, IA

August 29, 2022Hancock County, McDonough County, Illinois

NWS Quad Cities, IA issued this severe thunderstorm warning at Aug 29, 2022, 4:20 PM CDT for Hancock County, McDonough County, Illinois. It was in force for 40 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: Aug 29, 2022, 4:20 PM CDT (21:20 UTC)
Expired: Aug 29, 2022, 5:00 PM CDT
In force: 40 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

Counties Hancock County, IL, McDonough County, IL

The radar

The Quad Cities radar (KDVN), 134 km from the middle of the area, began a volume at 21:23 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, 9.3 hours before the alert went out and 137 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: 2800 J/kg
Mixed-layer CIN: -103 J/kg
Mixed-layer LCL: 873 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 283 m²/s²
0-3 km storm-relative helicity: 324 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 Quad Cities, IA wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 29, 2:12 PM CDT, 2 hours 8 minutes earlier.

Area forecast discussion, Aug 29, 2:12 PM CDT, 2 hours 8 minutes before

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Hazardous weather outlook, Aug 29, 3:15 PM CDT, 1 hour 5 minutes before

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In the hours before

Special weather statement, Aug 29, 11:26 AM CDT, 4 hours 54 minutes before

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Special weather statement, Aug 29, 11:46 AM CDT, 4 hours 34 minutes before

Special Weather Statement
National Weather Service Quad Cities IA/IL
1146 AM CDT Mon Aug 29 2022

ILZ017-018-291715-
Bureau IL-Putnam IL-
1146 AM CDT Mon Aug 29 2022

...A strong thunderstorm will impact portions of Putnam and southern
Bureau Counties through 1215 PM CDT...

At 1146 AM CDT, Doppler radar was tracking a strong thunderstorm near
Tiskilwa, or 10 miles south of Princeton, moving east at 60 mph.

HAZARD...Wind gusts up to 50 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could knock down tree limbs and blow around
         unsecured objects. Minor damage to outdoor objects is
         possible.

This strong thunderstorm will be near...
  Hennepin, DePue and Bureau Junction around 1155 AM CDT.
  Granville and McNabb around 1200 PM CDT.

This includes the following highways...
 Interstate 80 in Illinois between mile markers 68 and 72.
 Interstate 180 between mile markers 1 and 11.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

Torrential rainfall is also occurring with this storm and may lead to
localized flooding. Do not drive your vehicle through flooded
roadways.

A Severe Thunderstorm Watch remains in effect until 400 PM CDT for
north central Illinois.

&&

LAT...LON 4110 8936 4112 8934 4115 8933 4115 8964
      4123 8964 4123 8985 4135 8984 4139 8917
      4111 8916
TIME...MOT...LOC 1646Z 274DEG 54KT 4124 8952

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH

Ervin

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 29, 9:11 AM CDT	Severe Thunderstorm Warning	DVN	Henry, Jefferson, Keokuk, Washington	49 min
Aug 29, 9:26 AM CDT	Special Weather Statement	DVN	Clinton	34 min
Aug 29, 9:51 AM CDT	Severe Thunderstorm Warning	DVN	Clinton, Scott	39 min
Aug 29, 10:07 AM CDT	Severe Thunderstorm Warning	DVN	Muscatine, Scott	38 min
Aug 29, 10:13 AM CDT	Severe Thunderstorm Warning	DVN	Louisa, Muscatine	34 min
Aug 29, 11:26 AM CDT	Special Weather Statement	DVN	Stark	34 min
Aug 29, 11:46 AM CDT	Special Weather Statement	DVN	Putnam	29 min
Aug 29, 11:53 AM CDT	Severe Thunderstorm Warning	DVN	Bureau, Putnam	37 min
Aug 29, 4:49 PM CDT	Severe Thunderstorm Warning	DVN	McDonough	41 min
Aug 29, 5:04 PM CDT	Severe Thunderstorm Warning	DVN	Hancock, McDonough	41 min
Aug 29, 6:01 PM CDT	Special Weather Statement	DVN	Hancock	29 min
Aug 29, 6:15 PM CDT	Severe Thunderstorm Warning	DVN	Hancock	30 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2022 Every severe thunderstorm warning in 2022

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.