Alert archive / Illinois / River Flood Watches in 2017

River Flood Watch 64, NWS Quad Cities, IA

July 12, 2017Whiteside County, Illinois

NWS Quad Cities, IA issued this river flood watch at Jul 12, 2017, 3:55 PM CDT for Whiteside County, Illinois. It took effect at Jul 14, 2017, 10:00 AM CDT. It was in force for 4 days.

The area

The counties it named.

The facts

Issued
Jul 12, 2017, 3:55 PM CDT (20:55 UTC)
In effect from
Jul 14, 2017, 10:00 AM CDT
Expired
Jul 18, 2017, 1:00 PM CDT
In force
4 days
Issued by
NWS Quad Cities, IA
Area
Storm-based polygon
Flood severity
None

County Whiteside County, IL

The radar

The Quad Cities radar (KDVN), 58 km from the middle of the area, began a volume at 20:56 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 Rock River at Como (CMOI2). The gauge peaked at 9.04 ft at Jul 17, 2017, 10:00 AM CDT.

actionminormoderate101507/1207/1307/1407/1507/1607/1707/1807/19
Action stage
10 ft
Minor stage
12.5 ft
Moderate stage
15.5 ft
Major stage
18 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 05443500, 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 watch 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 watch went out at Jul 12, 3:41 PM CDT, 14 minutes earlier.

Area forecast discussion, Jul 12, 3:41 PM CDT, 14 minutes before
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Hazardous weather outlook, Jul 12, 3:43 PM CDT, 12 minutes before
Hazardous Weather Outlook
National Weather Service Quad Cities IA IL
343 PM CDT Wed Jul 12 2017

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-132045-
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-
343 PM CDT Wed Jul 12 2017

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

Scattered thunderstorms are expected this afternoon and tonight.
Severe storms are possible with the primary risks being damaging
winds of 60 to 70 MPH, and flooding rains. Large hail is an
isolated risk. Areas that have recently received heavy rainfall
during the past few days will be especially prone to flash
flooding. Some area tributary rivers that are impacted by storms
will also experience significant rises.

The Storm Prediction Center has placed the entire area in a
slight risk for severe weather.

Heat indices in the upper 90s to near 100 F are expected along and south
of a Marengo, Iowa to Moline, Illinois line into the early
evening.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

The next chance for scattered storms will be Saturday night into
Sunday. It is too early to assess the potential for severe
weather.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed this evening and tonight.

Uttech/12

In the hours before

Local storm report, Jul 12, 11:10 AM CDT, 4 hours 45 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1110 AM CDT WED JUL 12 2017

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

1230 AM     TSTM WND DMG     2 WNW DUBUQUE           42.52N 90.73W
07/12/2017                   DUBUQUE            IA   TRAINED SPOTTER

            NUMEROUS TREES AND BRANCHES DOWN.

&&

UTTECH
Special weather statement, Jul 12, 11:18 AM CDT, 4 hours 37 minutes before
Special Weather Statement
National Weather Service Quad Cities IA/IL
1118 AM CDT WED JUL 12 2017

ILC015-121645-
Carroll-
1118 AM CDT WED JUL 12 2017

...A LINE OF STRONG THUNDERSTORMS WILL AFFECT NORTHEASTERN CARROLL
COUNTY UNTIL 1145 AM CDT...

At 1117 AM CDT, radar indicated strong thunderstorms were located
along a line extending from near Shannon to near Chadwick. Movement
was east at 30 mph.

Winds in excess of 40 mph and half inch hail are possible with these
storms.

Locations impacted include...
Lanark, Shannon, Chadwick and Hitt.

LAT...LON 4201 8994 4218 8985 4218 8969 4197 8969
TIME...MOT...LOC 1617Z 272DEG 26KT 4211 8970 4204 8985

UTTECH
Local storm report, Jul 12, 11:29 AM CDT, 4 hours 26 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1129 AM CDT WED JUL 12 2017

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

1127 AM     HEAVY RAIN       STOCKTON                42.35N 90.01W
07/12/2017  M1.13 INCH       JO DAVIESS         IL   CO-OP OBSERVER

            RAIN FELL IN JUST OVER AN HOUR.

&&

BROOKS
Local storm report, Jul 12, 12:12 PM CDT, 3 hours 43 minutes before
PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1212 PM CDT WED JUL 12 2017

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

0535 PM     TORNADO          3 NE WILLIAMSBURG       41.70N 91.97W
07/11/2017  F1               IOWA               IA   NWS STORM SURVEY

            AN EF-1 TORNADO, WITH PEAK ESTIMATED WINDS OF 105 MPH,
            TOUCHED DOWN NORTHEAST OF WILLIAMSBURG AT 535 PM CDT AND
            PRODUCED DAMAGE TO MAINLY TREES AND CROPS ALONG ITS 4.6
            MILE PATH. ITS MAX WIDTH WAS 60 YARDS. TWO HOUSES
            SUSTAINED DAMAGE TO WINDOWS AND SIDING. ONE FARM
            OUTBUILDING LOST PART OF ITS ROOF, AND ANOTHER WAS
            PARTIALLY DESTROYED. THE TORNADO LIFTED AT 554 PM.

&&

DC
Local storm report, Jul 12, 12:19 PM CDT, 3 hours 36 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1219 PM CDT WED JUL 12 2017

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

1147 AM     HEAVY RAIN       SSE SHANNON             42.15N 89.74W
07/12/2017  M1.84 INCH       CARROLL            IL   TRAINED SPOTTER

            RAIN FELL IN JUST UNDER AN HOUR.

&&

BROOKS

The office that day

Everything else NWS Quad Cities, IA issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 11, 7:26 PM CDTSpecial Weather StatementDVNJohnson64 min
Jul 11, 10:17 PM CDTSevere Thunderstorm WarningDVNDelaware, Dubuque58 min
Jul 11, 11:03 PM CDTFlash Flood WarningDVNDubuque6 hr
Jul 11, 11:52 PM CDTSevere Thunderstorm WarningDVNDubuque53 min
Jul 12, 12:37 AM CDTSevere Thunderstorm WarningDVNDubuque, Jackson52 min
Jul 12, 12:57 AM CDTSevere Thunderstorm WarningDVNJackson63 min
Jul 12, 4:05 AM CDTHeat AdvisoryDVNBenton, Buchanan, Cedar, Clinton, Delaware, Des Moines and 15 more16 hr
Jul 12, 9:39 AM CDTFlash Flood WatchDVNDubuque6 hr
Jul 12, 3:13 PM CDTFlash Flood WatchDVNDes Moines, Henry, Jefferson, Lee, Louisa, Muscatine and 3 more12 hr
Jul 12, 6:09 PM CDTSpecial Weather StatementDVNBenton, Iowa66 min
Jul 12, 11:18 AM CDTSpecial Weather StatementDVNCarroll27 min
Jul 12, 3:55 PM CDTRiver Flood WatchDVNHenry, Rock Island, Whiteside7 days
Jul 12, 6:50 PM CDTSpecial Weather StatementDVNScotland70 min

Nearby

River Flood Watches in Illinois, 2017Every river flood watch in 2017

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.