Alert archive / Iowa / Special Weather Statements in 2020

Special Weather Statement, NWS Quad Cities, IA

June 19, 2020Iowa County, Iowa

NWS Quad Cities, IA issued this special weather statement at Jun 19, 2020, 3:44 PM CDT for Iowa County, Iowa. It was in force for 31 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 19, 2020, 3:44 PM CDT (20:44 UTC)
Expired: Jun 19, 2020, 4:15 PM CDT
In force: 31 min
Issued by: NWS Quad Cities, IA

County Iowa County, IA

The radar

The Quad Cities radar (KDVN), 109 km from the middle of the area, began a volume at 20:48 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, 8.7 hours before the alert went out and 116 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: 5 J/kg
Mixed-layer CIN: -453 J/kg
Mixed-layer LCL: 1818 m above ground
0-6 km bulk shear: 5 kt
0-1 km storm-relative helicity: -34 m²/s²
0-3 km storm-relative helicity: 7 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 19, 2:59 PM CDT, 45 minutes earlier.

Area forecast discussion, Jun 19, 2:59 PM CDT, 45 minutes before

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Hazardous weather outlook, Jun 19, 4:15 AM CDT, 11 hours 29 minutes before

Hazardous Weather Outlook
National Weather Service Quad Cities IA IL
415 AM CDT Fri Jun 19 2020

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-201000-
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-
415 AM CDT Fri Jun 19 2020

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

Scattered thunderstorms will occur across portions of the Outlook
area today and tonight. While the threat for severe weather is
low, the more substantial storms will still be capable of
producing locally heavy rainfall and ponding of water. This may
lead to some minor flooding in areas that get hit by several
storms.

Flooding is ongoing on the Wapsipinicon River near DeWitt. Please
see the latest Flood Statements and Flood Warnings for details.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

There will be chances for thunderstorms periodically through the
period. Storms on Saturday, Sunday night and Monday could have the
potential to be strong, but chances for severe storms is not high
at this time. Storms will also be capable of producing heavy
rainfall.

.SPOTTER INFORMATION STATEMENT...

Spotter activation is not anticipated for today or tonight.

In the hours before

Local storm report, Jun 19, 10:03 AM CDT, 5 hours 41 minutes before

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Local storm report, Jun 19, 10:08 AM CDT, 5 hours 36 minutes before

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Local storm report, Jun 19, 10:21 AM CDT, 5 hours 23 minutes before

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Special weather statement, Jun 19, 1:38 PM CDT, 2 hours 6 minutes before

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Special weather statement, Jun 19, 3:28 PM CDT, 16 minutes before

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Special weather statement, Jun 19, 3:44 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 19, 7:45 AM CDT	Special Weather Statement	DVN	Van Buren	60 min
Jun 19, 8:34 AM CDT	Special Weather Statement	DVN	Van Buren	56 min
Jun 19, 9:08 AM CDT	Flash Flood Warning	DVN	Van Buren	2 hr
Jun 19, 1:38 PM CDT	Special Weather Statement	DVN	Benton	67 min
Jun 19, 3:28 PM CDT	Special Weather Statement	DVN	Iowa	32 min
Jun 19, 4:56 PM CDT	Special Weather Statement	DVN	Van Buren	64 min
Jun 19, 5:53 PM CDT	Special Weather Statement	DVN	Des Moines, Henry, Lee	37 min
Jun 19, 6:59 PM CDT	Special Weather Statement	DVN	Des Moines	46 min
Jun 19, 4:10 PM CDT	Special Weather Statement	DVN	Scotland	50 min

Nearby

Special Weather Statements in Iowa, 2020 Every special weather statement in 2020

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.