Alert archive / Illinois / Frost Advisories in 2010

Frost Advisory 3, NWS Lincoln, IL

May 8, 201027 counties in Illinois

NWS Lincoln, IL issued this frost advisory at May 8, 2010, 2:51 AM CDT for 27 counties in Illinois. It took effect at May 9, 2010, 12:00 AM CDT. It was in force for 7 hr.

The area

The counties it named.

The facts

Issued: May 8, 2010, 2:51 AM CDT (07:51 UTC)
In effect from: May 9, 2010, 12:00 AM CDT
Expired: May 9, 2010, 7:00 AM CDT
In force: 7 hr
Issued by: NWS Lincoln, IL

All 27 counties

Cass County, IL, Champaign County, IL, Christian County, IL, Coles County, IL, DeWitt County, IL, Douglas County, IL, Edgar County, IL, Fulton County, IL, Knox County, IL, Logan County, IL, Macon County, IL, Marshall County, IL, Mason County, IL, McLean County, IL, Menard County, IL, Morgan County, IL, Moultrie County, IL, Peoria County, IL, Piatt County, IL, Sangamon County, IL, Schuyler County, IL, Scott County, IL, Shelby County, IL, Stark County, IL, Tazewell County, IL, Vermilion County, IL, Woodford County, IL

The radar

The Lincoln radar (KILX), 5 km from the middle of the area, began a volume at 07:54 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, 7.9 hours before the alert went out and 57 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: 13 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 725 m above ground
0-6 km bulk shear: 81 kt
0-1 km storm-relative helicity: -135 m²/s²
0-3 km storm-relative helicity: 52 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 frost 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 frost advisory went out at May 7, 6:53 PM CDT, 7 hours 58 minutes earlier.

Area forecast discussion, May 7, 6:53 PM CDT, 7 hours 58 minutes before

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Hazardous weather outlook, May 7, 3:06 PM CDT, 11 hours 45 minutes before

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Nearby

Frost Advisories in Illinois, 2010 Every frost advisory in 2010

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.