Alert archive / Iowa / Severe Thunderstorm Warnings in 2023

Severe Thunderstorm Warning 75, NWS Quad Cities, IA

April 19, 2023Dubuque County, Iowa; Jo Daviess County, Illinois

NWS Quad Cities, IA issued this severe thunderstorm warning at Apr 19, 2023, 11:26 AM CDT for Dubuque County, Iowa; Jo Daviess County, Illinois. It was in force for 19 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: Apr 19, 2023, 11:26 AM CDT (16:26 UTC)
Expired: Apr 19, 2023, 11:45 AM CDT
In force: 19 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

Counties Dubuque County, IA, Jo Daviess County, IL

The radar

The Quad Cities radar (KDVN), 90 km from the middle of the area, began a volume at 16:25 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, 4.4 hours before the alert went out and 89 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 1706 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 408 m²/s²
0-3 km storm-relative helicity: 418 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 Apr 19, 6:02 AM CDT, 5 hours 24 minutes earlier.

Area forecast discussion, Apr 19, 6:02 AM CDT, 5 hours 24 minutes before

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Hazardous weather outlook, Apr 19, 3:14 AM CDT, 8 hours 12 minutes before

Hazardous Weather Outlook
National Weather Service Quad Cities IA IL
314 AM CDT Wed Apr 19 2023

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-200815-
Buchanan-Delaware-Dubuque-Benton-Linn-Jones-Jackson-Iowa-Johnson-
Cedar-Clinton-Muscatine-Scott-Keokuk-Washington-Louisa-Jefferson-
Henry IA-Des Moines-Van Buren-Lee-Jo Daviess-Stephenson-Carroll-
Whiteside-Rock Island-Henry IL-Bureau-Putnam-Mercer-Henderson-
Warren-Hancock-McDonough-Scotland-Clark-
314 AM CDT Wed Apr 19 2023

This Hazardous Weather Outlook is for portions of north central
Illinois...northwest Illinois...west central Illinois...east
central Iowa...northeast Iowa...southeast Iowa and northeast
Missouri.

.DAY ONE...TODAY AND TONIGHT

Thunderstorms are possible north of Highway 30 today, and over the
entire area tonight. The Storm Prediction Center is forecasting a
slight risk for severe storms tonight, mainly west of a Cedar
Rapids to Fairfield Iowa line, with a Marginal Risk farther east.
The main risk tonight will be large hail, and potentially heavy
rainfall. There is a low risk for damaging winds as well.

Locations along the Mississippi River will begin to experience
flooding this week. Please see the latest Flood Statements and
Flood Warnings for details.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

There is a marginal risk for severe storms forecast for Illinois
Thursday, as a cold front sweeps through the area. The risk for
storms is conditional that we warm up into the 70s Thursday. If
storms do refire, there could be a risk for hail and damaging
winds in the afternoon.

Cold weather is forecast for the upcoming weekend, with a nightly
threat for below freezing temperatures Friday night through
Sunday night.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is possible tonight, mainly in eastern Iowa.

ERVIN

In the hours before

Local storm report, Apr 19, 10:07 AM CDT, 1 hour 19 minutes before

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Local storm report, Apr 19, 10:29 AM CDT, 57 minutes before

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Local storm report, Apr 19, 10:40 AM CDT, 46 minutes before

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Local storm report, Apr 19, 10:42 AM CDT, 44 minutes before

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Local storm report, Apr 19, 11:15 AM CDT, 11 minutes before

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Local storm report, Apr 19, 11:21 AM CDT, 5 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
Apr 19, 8:22 AM CDT	Special Weather Statement	DVN	Delaware	23 min
Apr 19, 9:25 AM CDT	Special Weather Statement	DVN	Delaware, Linn	35 min
Apr 19, 9:36 AM CDT	Severe Thunderstorm Warning	DVN	Buchanan, Delaware, Linn	24 min
Apr 19, 9:41 AM CDT	Severe Thunderstorm Warning	DVN	Jones, Linn	34 min
Apr 19, 9:54 AM CDT	Severe Thunderstorm Warning	DVN	Delaware, Dubuque, Jones	36 min
Apr 19, 10:08 AM CDT	Severe Thunderstorm Warning	DVN	Delaware, Jones, Linn	37 min
Apr 19, 10:25 AM CDT	Severe Thunderstorm Warning	DVN	Dubuque	11 min
Apr 19, 10:30 AM CDT	Severe Thunderstorm Warning	DVN	Dubuque, Jackson, Jones	30 min
Apr 19, 10:53 AM CDT	Severe Thunderstorm Warning	DVN	Dubuque, Jackson, Jones	37 min
Apr 19, 11:24 AM CDT	Severe Thunderstorm Warning	DVN	Dubuque, Jackson, Jones	36 min
Apr 19, 11:25 AM CDT	Severe Thunderstorm Warning	DVN	Dubuque, Jackson, Jones	35 min
Apr 19, 11:46 AM CDT	Severe Thunderstorm Warning Considerable damage threat	DVN	Jo Daviess	29 min
Apr 19, 2:18 PM CDT	Special Weather Statement	DVN	Bureau	27 min
Apr 19, 2:22 PM CDT	Severe Thunderstorm Warning	DVN	Bureau	38 min
Apr 19, 2:47 PM CDT	Special Weather Statement	DVN	Bureau	43 min
Apr 19, 3:04 PM CDT	Severe Thunderstorm Warning	DVN	Bureau	30 min
Apr 19, 3:16 PM CDT	Special Weather Statement	DVN	Whiteside	14 min
Apr 19, 3:34 PM CDT	Special Weather Statement	DVN	Bureau	26 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2023 Severe Thunderstorm Warnings in Illinois, 2023 Every severe thunderstorm warning in 2023

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.