Alert archive / Illinois / Ice Storm Warnings in 2019
Ice Storm Warning 2, NWS Chicago, IL
NWS Chicago, IL issued this ice storm warning at Feb 11, 2019, 9:59 PM CST for 8 counties in Illinois; Lake County, Porter County, Indiana. It was in force for 11 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, 9:59 PM CST (03:59 UTC)
- Expired
- Feb 12, 2019, 9:00 AM CST
- In force
- 11 hr
- Issued by
- NWS Chicago, IL
Counties DeKalb County, IL, DuPage County, IL, Grundy County, IL, Kane County, IL, Kendall County, IL, LaSalle County, IL, Lee County, IL, Ogle County, IL, Lake County, IN, Porter County, IN
The radar
The Chicago radar (KLOT), 28 km from the middle of the area, began a volume at 04:00 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, 4.0 hours before the alert went out and 170 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.
- 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
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 Chicago, IL wrote its last area forecast discussion before this ice storm warning went out at Feb 11, 7:37 PM CST, 2 hours 22 minutes earlier.
Area forecast discussion, Feb 11, 7:37 PM CST, 2 hours 22 minutes before
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</html>Hazardous weather outlook, Feb 11, 3:52 PM CST, 6 hours 7 minutes before
Hazardous Weather Outlook National Weather Service Chicago/Romeoville IL 352 PM CST Mon Feb 11 2019 ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019- 122200- Winnebago-Boone-McHenry-Lake IL-Ogle-Lee-DeKalb-Kane-DuPage-Cook- La Salle-Kendall-Grundy-Will-Kankakee-Livingston-Iroquois-Ford- Lake IN-Porter-Newton-Jasper-Benton- 352 PM CST Mon Feb 11 2019 /452 PM EST Mon Feb 11 2019/ This Hazardous Weather Outlook is for portions of North Central Illinois...Northeast Illinois and Northwest Indiana. .DAY ONE...Tonight. Weather hazards expected... Significant Ice accumulation Risk. Elevated Snow Risk. DISCUSSION... Snow and freezing rain will develop over northern Illinois and portions of northwestern Indiana through the evening and continue tonight. This will especially be the case along and north of Interstate 80. Surface air temperatures may warm just above freezing over much of the Chicago metro area overnight, which would help to limit the extent of ice and snow accumulations over most of northeastern Illinois and northwestern Indiana. However, areas along and west of the Fox Valley and along and north of Interstate 80 may remain just below freezing tonight, which could result in some significant ice accumulations up to around a quarter inch. The greatest snow accumulation is expected north of Interstate 88. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Tuesday... Limited Non Thunderstorm Wind Risk. Limited Ice Accumulation Risk. Limited Snow Risk. Thursday... Limited Snow Risk. Friday... Limited Excessive Cold Risk. Limited Non Thunderstorm Wind Risk. Elevated Snow Risk. Saturday and Sunday... Limited Excessive Cold Risk. DISCUSSION: A mix of snow and freezing rain will continue across far northern Illinois early Tuesday morning, before changing over to snow area wide by mid afternoon. Strong westerly winds will develop late Tuesday and continue Tuesday night. This may result in areas of blowing snow and possibly increase the risk for power outages, especially for areas that receive the more substantial ice accumulations tonight. .SPOTTER INFORMATION STATEMENT... Spotter activation will not be necessary through tonight. LMZ740>745-122200- Winthrop Harbor to Wilmette Harbor- Wilmette Harbor to Northerly Island- Northerly Island to Calumet Harbor-Calumet Harbor to Gary- Gary to Burns Harbor-Burns Harbor to Michigan City- 352 PM CST Mon Feb 11 2019 This Hazardous Weather Outlook is for portions of the Illinois nearshore waters of Lake Michigan and the Indiana nearshore waters of Lake Michigan. .DAY ONE...Tonight. Weather hazards expected... Hazardous conditions for small craft. .DAYS TWO THROUGH SEVEN...Tuesday through Sunday. Tuesday... Gale force winds are likely Tuesday evening and Tuesday night. Wednesday through Saturday... Hazardous conditions for small craft are likely. MDB/MTF Visit us at http://weather.gov/chicago Follow us on Facebook, Twitter, and Youtube at: www.facebook.com/nwschicago www.twitter.com/nwschicago www.youtube.com/nwschicago
In the hours before
Local storm report, Feb 11, 8:37 PM CST, 1 hour 22 minutes before
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</html>Local storm report, Feb 11, 9:31 PM CST, 28 minutes before
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</html>Local storm report, Feb 11, 9:53 PM CST, 6 minutes before
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</html>The office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Feb 11, 9:59 PM CST | Winter Storm Warning | LOT | Boone, Winnebago | 14 hr |
| Feb 12, 3:44 AM CST | Wind Advisory | LOT | DeKalb, DuPage, Ford, Grundy, Iroquois, Kane and 6 more | 23 hr |
| Feb 12, 3:50 AM CST | Gale Warning | LOT | 29 hr | |
| Feb 12, 7:57 AM CST | Dense Fog Advisory | LOT | DeKalb, DuPage, Ford, Grundy, Iroquois, Kane and 6 more | 2 hr |
| Feb 12, 9:11 AM CST | Marine Dense Fog Advisory | LOT | 6 hr |
Nearby
Ice Storm Warnings in Illinois, 2019Ice Storm Warnings in Indiana, 2019Every 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.