Alert archive / Illinois / Dense Fog Advisories in 2021
Dense Fog Advisory 8, NWS Lincoln, IL
NWS Lincoln, IL issued this dense fog advisory at Jun 10, 2021, 4:51 AM CDT for 11 counties in Illinois. It was in force for 3 hr.
The area
The counties it named.
The facts
- Issued
- Jun 10, 2021, 4:51 AM CDT (09:51 UTC)
- Expired
- Jun 10, 2021, 8:00 AM CDT
- In force
- 3 hr
- Issued by
- NWS Lincoln, IL
Counties Clark County, IL, Clay County, IL, Coles County, IL, Crawford County, IL, Cumberland County, IL, Effingham County, IL, Jasper County, IL, Lawrence County, IL, Moultrie County, IL, Richland County, IL, Shelby County, IL
The radar
The Evansville,IN radar (KVWX), 106 km from the middle of the area, began a volume at 09:51 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
Davenport, (KDVN), launched 00:00Z, 9.9 hours before the alert went out and 337 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
- 402 J/kg
- Mixed-layer CIN
- -16 J/kg
- Mixed-layer LCL
- 1694 m above ground
- 0-6 km bulk shear
- 11 kt
- 0-1 km storm-relative helicity
- -18 m²/s²
- 0-3 km storm-relative helicity
- 4 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this dense fog advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Lincoln, IL wrote its last area forecast discussion before this dense fog advisory went out at Jun 10, 3:31 AM CDT, 1 hour 20 minutes earlier.
Area forecast discussion, Jun 10, 3:31 AM CDT, 1 hour 20 minutes before
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Dense Fog Advisories in Illinois, 2021Every dense fog advisory in 2021
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.