Alert archive / Iowa / River Flood Warnings in 2018

River Flood Warning 111, NWS Quad Cities, IA

September 21, 2018Buchanan County, Linn County, Iowa

NWS Quad Cities, IA issued this river flood warning at Sep 21, 2018, 4:16 AM CDT for Buchanan County, Linn County, Iowa. It took effect at Sep 21, 2018, 7:00 AM CDT. It was in force for 4 days.

The area

The counties it named.

The facts

Issued: Sep 21, 2018, 4:16 AM CDT (09:16 UTC)
In effect from: Sep 21, 2018, 7:00 AM CDT
Expired: Sep 25, 2018, 6:49 AM CDT
In force: 4 days
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Flood severity: Moderate

Counties Buchanan County, IA, Linn County, IA

The radar

The Quad Cities radar (KDVN), 120 km from the middle of the area, began a volume at 09:15 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 river

Written for the forecast point Wapsipinicon River at Independence (IDPI4). The gauge peaked at 13.10 ft at Sep 23, 2018, 11:00 PM CDT.

Action stage: 10 ft
Minor stage: 12 ft
Moderate stage: 13 ft
Major stage: 15 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 05421000, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.

What forecasters said that day

The local office's own words before this river flood 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 river flood warning went out at Sep 21, 3:47 AM CDT, 29 minutes earlier.

Area forecast discussion, Sep 21, 3:47 AM CDT, 29 minutes before

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Hazardous weather outlook, Sep 21, 4:16 AM CDT, 0 minutes before

Hazardous Weather Outlook
National Weather Service Quad Cities IA IL
416 AM CDT Fri Sep 21 2018

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-220930-
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-
416 AM CDT Fri Sep 21 2018

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

Another round of flooding is expected on some area rivers due to
recent heavy rainfall. Please see the latest Flood Statements and
Flood Warnings for details.

.DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY

There is a chance of thunderstorms Monday night and Tuesday. However,
the severe weather risk appears low at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed today or tonight.

DLS

In the hours before

Special weather statement, Sep 21, 1:11 AM CDT, 3 hours 5 minutes before

Special Weather Statement
National Weather Service Quad Cities IA/IL
111 AM CDT FRI SEP 21 2018

ILC011-015-067-071-073-085-109-131-161-177-187-195-IAC031-045-057-
061-087-097-101-103-105-111-115-139-163-177-183-MOC045-199-210730-
Rock Island-Whiteside-Carroll-Warren-Bureau-Henderson-Mercer-Jo
Daviess-Stephenson-Hancock-McDonough-Henry-Jackson-Muscatine-Des
Moines-Dubuque-Johnson-Jones-Clinton-Lee-Van
Buren-Cedar-Washington-Jefferson-Henry-Louisa-Scott-Scotland-Clark-
111 AM CDT FRI SEP 21 2018

...LINE OF THUNDERSTORMS WITH STRONG WINDS WILL AFFECT EASTERN IOWA
AND NORTHWEST ILLINOIS THROUGH 2 AM CDT...

At 103 AM CDT, radar indicated a line of showers and thunderstorms
with strong gusty winds extending from near Dubuque to Mount
Pleasant. Movement was east around 40 mph.

Wind gusts up to 50 mph are possible with these storms.

LAT...LON 4250 8940 4220 8940 4220 8969 4193 8969
      4193 8963 4159 8963 4158 8952 4123 8969
      4123 8987 4115 8987 4115 9044 4054 9045
      4055 9210 4251 9070
TIME...MOT...LOC 0603Z 291DEG 27KT 4237 9074 4081 9192

Sheets

Local storm report, Sep 21, 3:02 AM CDT, 1 hour 14 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
Sep 20, 9:17 PM CDT	River Flood Warning	DVN	Cedar, Louisa, Muscatine	33 days
Sep 20, 9:17 PM CDT	River Flood Warning	DVN	Louisa	36 days
Sep 20, 9:17 PM CDT	River Flood Warning	DVN	Louisa	38 days
Sep 21, 1:11 AM CDT	Special Weather Statement	DVN	Cedar, Clinton, Des Moines, Henry, Jackson, Lee and 4 more	79 min
Sep 21, 10:30 AM CDT	River Flood Warning	DVN	Benton, Linn	6 days
Sep 21, 10:30 AM CDT	River Flood Warning	DVN	Cedar, Johnson, Linn	8 days
Sep 21, 10:30 AM CDT	River Flood Warning	DVN	Louisa	32 days
Sep 21, 11:17 AM CDT	River Flood Watch	DVN	Des Moines, Louisa	24 hr

Nearby

River Flood Warnings in Iowa, 2018 Every river flood warning in 2018

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; the gauge from the NWS water service and the USGS.