Alert archive / Illinois / Wind Advisories in 2020

Wind Advisory 12, NWS Chicago, IL

November 10, 202018 counties in Illinois; 4 counties in Indiana

NWS Chicago, IL issued this wind advisory at Nov 10, 2020, 2:58 AM CST for 18 counties in Illinois; 4 counties in Indiana. It took effect at Nov 10, 2020, 12:00 PM CST. It was in force for 15 hr.

The area

The counties it named.

The facts

Issued: Nov 10, 2020, 2:58 AM CST (08:58 UTC)
In effect from: Nov 10, 2020, 12:00 PM CST
Expired: Nov 11, 2020, 3:00 AM CST
In force: 15 hr
Issued by: NWS Chicago, IL

All 22 counties

Boone County, IL, Cook County, IL, DeKalb County, IL, DuPage County, IL, Ford County, IL, Grundy County, IL, Iroquois County, IL, Kane County, IL, Kankakee County, IL, Kendall County, IL, Lake County, IL, LaSalle County, IL, Lee County, IL, Livingston County, IL, McHenry County, IL, Ogle County, IL, Will County, IL, Winnebago County, IL, Jasper County, IN, Lake County, IN, Newton County, IN, Porter County, IN

The radar

The Chicago radar (KLOT), 12 km from the middle of the area, began a volume at 08:57 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, 9.0 hours before the alert went out and 162 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: 1190 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 134 m²/s²
0-3 km storm-relative helicity: 183 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 wind advisory 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 wind advisory went out at Nov 10, 2:17 AM CST, 41 minutes earlier.

Area forecast discussion, Nov 10, 2:17 AM CST, 41 minutes before

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Hazardous weather outlook, Nov 9, 3:22 PM CST, 11 hours 36 minutes before

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The office that day

Everything else NWS Chicago, IL issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Nov 10, 2:48 PM CST	Severe Thunderstorm Warning	LOT	Lee, Ogle	72 min
Nov 10, 3:20 PM CST	Severe Thunderstorm Warning	LOT	Boone, DeKalb, Lee, Ogle, Winnebago	70 min
Nov 10, 3:48 PM CST	Severe Thunderstorm Warning	LOT	LaSalle	57 min
Nov 10, 3:50 PM CST	Severe Thunderstorm Warning	LOT	Kane, McHenry	55 min
Nov 10, 4:10 PM CST	Severe Thunderstorm Warning	LOT	DeKalb, Kane, Kendall	80 min
Nov 10, 4:18 PM CST	Tornado Warning	LOT	LaSalle	27 min
Nov 10, 4:34 PM CST	Severe Thunderstorm Warning	LOT	Grundy, LaSalle, Livingston	71 min
Nov 10, 4:38 PM CST	Severe Thunderstorm Warning	LOT	Cook, DuPage, Lake, McHenry	82 min
Nov 10, 4:44 PM CST	Special Marine Warning	LOT		2 hr
Nov 10, 4:54 PM CST	Severe Thunderstorm Warning	LOT	Cook, Will	81 min
Nov 10, 5:47 PM CST	Special Weather Statement	LOT	Ford, Kankakee	43 min

Nearby

Wind Advisories in Illinois, 2020 Wind Advisories in Indiana, 2020 Every wind advisory 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.