Alert archive / Illinois / Special Weather Statements in 2021

Special Weather Statement, NWS Quad Cities, IA

June 28, 2021Hancock County, McDonough County, Illinois

NWS Quad Cities, IA issued this special weather statement at Jun 28, 2021, 4:23 PM CDT for Hancock County, McDonough County, Illinois. It was in force for 112 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jun 28, 2021, 4:23 PM CDT (21:23 UTC)
Expired: Jun 28, 2021, 6:15 PM CDT
In force: 112 min
Issued by: NWS Quad Cities, IA

Counties Hancock County, IL, McDonough County, IL

The radar

The Lincoln radar (KILX), 136 km from the middle of the area, began a volume at 21:24 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, 9.4 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: 59 J/kg
Mixed-layer CIN: -30 J/kg
Mixed-layer LCL: 862 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 34 m²/s²
0-3 km storm-relative helicity: 71 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Jun 28, 3:09 PM CDT, 1 hour 14 minutes earlier.

Area forecast discussion, Jun 28, 3:09 PM CDT, 1 hour 14 minutes before

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Hazardous weather outlook, Jun 28, 2:56 PM CDT, 1 hour 27 minutes before

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In the hours before

Special weather statement, Jun 28, 2:30 PM CDT, 1 hour 53 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE Quad Cities IA/IL
230 PM CDT Mon Jun 28 2021

IAZ066-068-ILZ009-015-282015-
Whiteside-Rock Island-Scott-Clinton-
230 PM CDT Mon Jun 28 2021

...Showers and Thunderstorms affecting northeastern Rock Island...
Whiteside...northeastern Scott and southeastern Clinton Counties
may produce Funnel Clouds...

At 224 PM CDT...A scattered line of showers and thunderstorms
stretched from near Dewitt, Iowa in Clinton county to the Sterling-
Rock Falls area in eastern Whiteside county.  These storms may
produce funnel clouds that have a low chance of touching down.

LOCATIONS IMPACTED INCLUDE...
Clinton, Sterling, Rock Falls, Morrison, DeWitt, Camanche, Fulton,
Prophetstown, Erie, Garden Plain, Albany, Princeton, Long Grove,
Tampico, Cordova, Lyndon, McCausland, Low Moor, Deer Grove and East
Clinton.

If these storms approach your location, be prepared to move to a
place of safety.

LAT...LON 4168 9065 4191 9052 4189 8963 4160 8963
TIME...MOT...LOC 1924Z 180DEG 0KT 4171 9011

Wolf

Special weather statement, Jun 28, 2:39 PM CDT, 1 hour 44 minutes before

Special Weather Statement
National Weather Service Quad Cities IA/IL
239 PM CDT Mon Jun 28 2021

ILC067-071-109-187-IAC057-282115-
Hancock-Henderson-Warren-McDonough-Des Moines-
239 PM CDT Mon Jun 28 2021

...HEAVY RAIN FROM THUNDERSTORMS WILL AFFECT NORTHEASTERN HANCOCK...
SOUTHERN HENDERSON...SOUTHERN WARREN...NORTHERN MCDONOUGH AND
SOUTHERN DES MOINES COUNTIES UNTIL 415 PM CDT...

At 237 PM CDT, radar indicated heavy rain from thunderstorms falling
over Disco, or 14 miles southeast of Burlington, moving east at 25
mph.

Winds in excess of 30 mph are possible with this storm, along with
possible minor flooding.

Locations impacted include...
Macomb, Bushnell, La Harpe, Roseville, Stronghurst, Blandinsville,
Good Hope, Prairie City, Carman, Terre Haute, Bardolph, Raritan,
Sciota, Western Illinois University, Little Swan Lake, New
Philadelphia, Burnside, Disco, Walnut Grove and Greenbush.

Torrential rainfall is also occurring with this storm, with rainfall
rates around 2-3" per hour. Minor flooding of low lying areas,
creeks, streams and urban areas is possible. If you encounter water
over a roadway, do not drive through it.

LAT...LON 4044 9111 4066 9114 4067 9112 4070 9111
      4070 9114 4076 9115 4091 9044 4043 9045
TIME...MOT...LOC 1937Z 258DEG 23KT 4061 9100

Gunkel

Local storm report, Jun 28, 3:53 PM CDT, 30 minutes before

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Local storm report, Jun 28, 3:57 PM CDT, 26 minutes before

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Local storm report, Jun 28, 4:09 PM CDT, 14 minutes before

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Special weather statement, Jun 28, 4:23 PM CDT, 0 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 28, 3:19 AM CDT	Flash Flood Watch	DVN	Clinton, Des Moines, Henry, Lee, Louisa, Muscatine and 2 more	38 hr
Jun 28, 12:01 PM CDT	Special Weather Statement	DVN	Lee, Van Buren	119 min
Jun 28, 12:20 PM CDT	Flash Flood Warning	DVN	Van Buren	5 hr
Jun 28, 1:36 PM CDT	Special Weather Statement	DVN	Lee	24 min
Jun 28, 2:30 PM CDT	Special Weather Statement	DVN	Whiteside	45 min
Jun 28, 2:39 PM CDT	Special Weather Statement	DVN	McDonough, Warren	96 min

Nearby

Special Weather Statements in Illinois, 2021 Every special weather statement in 2021

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.