Alert archive / Illinois / Ice Storm Warnings in 2019

Ice Storm Warning 3, NWS Quad Cities, IA

February 11, 20195 counties in Illinois

NWS Quad Cities, IA issued this ice storm warning at Feb 11, 2019, 10:06 PM CST for 5 counties in Illinois. It was in force for 8 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Feb 11, 2019, 10:06 PM CST (04:06 UTC)
Expired: Feb 12, 2019, 6:00 AM CST
In force: 8 hr
Issued by: NWS Quad Cities, IA

Counties Bureau County, IL, Carroll County, IL, Henry County, IL, Putnam County, IL, Whiteside County, IL

The radar

The Quad Cities radar (KDVN), 69 km from the middle of the area, began a volume at 04:10 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

Lincoln, IL (KILX), launched 00:00Z, 4.1 hours before the alert went out and 184 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 472 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 336 m²/s²
0-3 km storm-relative helicity: 441 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this ice storm 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 ice storm warning went out at Feb 11, 5:40 PM CST, 4 hours 26 minutes earlier.

Area forecast discussion, Feb 11, 5:40 PM CST, 4 hours 26 minutes before

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Hazardous weather outlook, Feb 11, 2:57 PM CST, 7 hours 9 minutes before

Hazardous Weather Outlook
National Weather Service Quad Cities IA IL
257 PM CST Mon Feb 11 2019

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-122100-
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-
257 PM CST Mon Feb 11 2019

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

Winter storm warnings and winter weather advisories are in effect
for the entire area through Tuesday evening.

A mixture of snow, sleet, and freezing rain will change over to
all snow. Moderate to heavy snow will be seen generally north of a
line from Sterling, Illinois to Sigourney, Iowa. The heaviest
snowfall is expected to occur north of a Sterling, Illinois to
Belle Plaine, Iowa line.

Area rivers are experiencing flooding due to recent rain,
snowmelt and ice action. Please see the latest Flood Statements
and Flood Warnings for details.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

Light snow will be seen across the area on Tuesday with very
strong winds developing around mid-day and continuing into
Tuesday evening. Winds gusting up to 45 mph are expected creating
drifting and blowing snow.

Storm total snowfall by Tuesday evening will be 7 to 10 inches
north of a Sterling, Illinois to Belle Plaine, Iowa line. Snowfall
amounts of 3 to 6 inches are expected down to a Princeton,
Illinois to Bloomfield, Iowa line. South of a Princeton, Illinois
to Bloomfield, Iowa line snowfall amounts will quickly taper off
to an inch.

A winter storm system may affect the outlook area Thursday and
Friday with measurable snow or possibly a wintry mix of
precipitation. It is too soon to determine more specific details.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed, but reports of snowfall
amounts greater than one inch would be appreciated.

In the hours before

Local storm report, Feb 11, 4:44 PM CST, 5 hours 22 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
444 PM CST MON FEB 11 2019

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

0435 PM     SNOW             3 ESE HIAWATHA          42.03N 91.64W
02/11/2019  M1.0 INCH        LINN               IA   BROADCAST MEDIA

            TOTAL SO FAR.

&&

PS

Local storm report, Feb 11, 5:07 PM CST, 4 hours 59 minutes before

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Local storm report, Feb 11, 5:55 PM CST, 4 hours 11 minutes before

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Nearby

Ice Storm Warnings in Illinois, 2019 Every ice storm warning in 2019

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.