Alert archive / Illinois / Heat Advisories in 2017
Heat Advisory 1, NWS Lincoln, IL
NWS Lincoln, IL issued this heat advisory at Jul 12, 2017, 3:36 AM CDT for 17 counties in Illinois. It took effect at Jul 12, 2017, 12:00 PM CDT. It was in force for 7 hr.
The area
The counties it named.
The facts
- Issued
- Jul 12, 2017, 3:36 AM CDT (08:36 UTC)
- In effect from
- Jul 12, 2017, 12:00 PM CDT
- Expired
- Jul 12, 2017, 7:00 PM CDT
- In force
- 7 hr
- Issued by
- NWS Lincoln, IL
Counties Cass County, IL, DeWitt County, IL, Fulton County, IL, Knox County, IL, Logan County, IL, Marshall County, IL, Mason County, IL, McLean County, IL, Menard County, IL, Morgan County, IL, Peoria County, IL, Sangamon County, IL, Schuyler County, IL, Scott County, IL, Stark County, IL, Tazewell County, IL, Woodford County, IL
The radar
The Lincoln radar (KILX), 43 km from the middle of the area, began a volume at 08:39 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, 8.6 hours before the alert went out and 102 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
- 3554 J/kg
- Mixed-layer CIN
- -3 J/kg
- Mixed-layer LCL
- 974 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 119 m²/s²
- 0-3 km storm-relative helicity
- 166 m²/s²
- Significant tornado parameter
- 2.2
- Supercell composite
- 17.4
What forecasters said that day
The local office's own words before this heat 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 heat advisory went out at Jul 12, 12:54 AM CDT, 2 hours 42 minutes earlier.
Area forecast discussion, Jul 12, 12:54 AM CDT, 2 hours 42 minutes before
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</html>Hazardous weather outlook, Jul 11, 4:03 PM CDT, 11 hours 33 minutes before
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</html>The office that day
Everything else NWS Lincoln, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 12, 3:21 PM CDT | Flash Flood Watch | ILX | Fulton, Knox, McLean, Marshall, Peoria, Stark and 2 more | 11 hr |
Nearby
Heat Advisories in Illinois, 2017Every heat advisory 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.