Alert archive / Iowa / Severe Thunderstorm Warnings in 2024

Severe Thunderstorm Warning 86, NWS Quad Cities, IA

April 27, 2024Iowa County, Keokuk County, Iowa

NWS Quad Cities, IA issued this severe thunderstorm warning at Apr 27, 2024, 6:35 PM CDT for Iowa County, Keokuk County, Iowa. 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: Apr 27, 2024, 6:35 PM CDT (23:35 UTC)
Expired: Apr 27, 2024, 7:15 PM CDT
In force: 40 min
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Damage threat: Considerable
Hail: 1.0 in
Wind: 70.0 mph

Counties Iowa County, IA, Keokuk County, IA

The radar

The Quad Cities radar (KDVN), 129 km from the middle of the area, began a volume at 23:37 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
Apr 27, 5:58 PM CDT	Tornado Watch	SPC	6 hr

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 27, 6:20 PM CDT, 15 minutes earlier.

Area forecast discussion, Apr 27, 6:20 PM CDT, 15 minutes before

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Hazardous weather outlook, Apr 27, 3:23 PM CDT, 3 hours 12 minutes before

Hazardous Weather Outlook
National Weather Service Quad Cities IA IL
323 PM CDT Sat Apr 27 2024

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-282030-
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-
323 PM CDT Sat Apr 27 2024

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...THIS AFTERNOON AND TONIGHT

Southerly wind gusts may occasionally reach 35 to 45 mph this
afternoon.

Thunderstorms are expected to develop this afternoon through
tonight. Severe weather is expected with large hail and damaging
winds the main threats. An isolated tornado cannot be ruled out
this evening. The Storm Prediction Center has placed portions of
eastern Iowa, northeast Missouri and west central Illinois in an
Enhanced risk, or level 3 out of 5, for severe weather, with the
remainder of the area in a Slight risk, or level 2 out of 5.

Heavy rainfall will also be possible with the storms and could
lead to a localized flooding risk. A Flood Watch has been issued
for southeast Iowa, west central Illinois, and northeast Missouri,
where rainfall totals around 1 to 2 inches will be possible
tonight.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY

Additional showers and storms are expected on Sunday. A few of
these storms could be severe Sunday afternoon and evening with
damaging winds, large hail, and isolated tornadoes. Heavy rainfall
could also pose a localized flooding risk.

The pattern will turn active once again Tuesday night through
Friday, with several chances for storms. It is too soon to
determine the severe weather threat.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will be needed at times through Sunday
evening.

GENERAL STORM MOTION OF THE DAY:

Toward the northeast at 30 to 40 MPH.

In the hours before

Special weather statement, Apr 27, 2:55 PM CDT, 3 hours 40 minutes before

Special Weather Statement
National Weather Service Quad Cities IA/IL
255 PM CDT Sat Apr 27 2024

ILZ002-007-272045-
Carroll IL-Stephenson IL-
255 PM CDT Sat Apr 27 2024

...A strong thunderstorm will impact portions of northeastern Carroll
and central Stephenson Counties through 345 PM CDT
...

At 255 PM CDT, Doppler radar was tracking a strong thunderstorm near
Pearl City, or 7 miles west of Freeport, moving northeast at 30 mph.

HAZARD...Winds in excess of 40 mph and half inch hail.

SOURCE...Radar indicated.

IMPACT...Gusty winds could cause minor tree limb damage and blow
         around unsecured objects. Minor damage to outdoor objects
         is possible.

Locations impacted include...
Freeport, Lena, Pearl City, Cedarville, Davis, Dakota, Rock City,
Ridott, Rock Grove, Eleroy, Red Oak, Damascus, Afolkey, Scioto Mills,
Winneshiek, Dakota Dornink Airport, Albertus Airport, Bolton,
Stephenson  County Fairgrounds, and Lake Summerset.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 4250 8940 4232 8940 4218 8976 4233 8989
      4250 8953
TIME...MOT...LOC 1955Z 238DEG 26KT 4230 8977

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

DC

Local storm report, Apr 27, 3:22 PM CDT, 3 hours 13 minutes before

Preliminary Local Storm Report
National Weather Service Quad Cities IA IL
322 PM CDT Sat Apr 27 2024

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

0303 PM     Hail             2 N Freeport            42.32N 89.63W
04/27/2024  M0.50 Inch       Stephenson         IL   Public

            Report from mPING: Half-inch (0.50 in.).

&&

Local storm report, Apr 27, 3:32 PM CDT, 3 hours 3 minutes before

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Special weather statement, Apr 27, 4:14 PM CDT, 2 hours 21 minutes before

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Local storm report, Apr 27, 5:26 PM CDT, 1 hour 9 minutes before

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Local storm report, Apr 27, 5:58 PM CDT, 37 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 27, 1:12 PM CDT	Flood Watch	DVN	Des Moines, Henry, Jefferson, Lee, Van Buren	13 hr
Apr 27, 4:14 PM CDT	Special Weather Statement	DVN	Dubuque	46 min
Apr 27, 4:34 PM CDT	Severe Thunderstorm Warning	DVN	Dubuque	41 min
Apr 27, 4:35 PM CDT	Severe Thunderstorm Warning	DVN	Buchanan, Delaware, Linn	40 min
Apr 27, 5:15 PM CDT	Severe Thunderstorm Warning	DVN	Iowa	45 min
Apr 27, 6:18 PM CDT	Severe Thunderstorm Warning	DVN	Delaware, Dubuque	42 min
Apr 27, 6:57 PM CDT	Severe Thunderstorm Warning	DVN	Jefferson, Van Buren	48 min
Apr 26, 9:00 PM CDT	River Flood Warning	DVN	Hancock, McDonough	5 days
Apr 27, 2:55 PM CDT	Special Weather Statement	DVN	Stephenson	50 min

Nearby

Severe Thunderstorm Warnings in Iowa, 2024 Every severe thunderstorm warning in 2024

Sources

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