Alert archive / Illinois / Special Weather Statements in 2017

Special Weather Statement, NWS Lincoln, IL

March 1, 2017Champaign County, Vermilion County, Illinois

NWS Lincoln, IL issued this special weather statement at Mar 1, 2017, 12:21 AM CST for Champaign County, Vermilion County, Illinois. It was in force for 54 min. 3 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Mar 1, 2017, 12:21 AM CST (06:21 UTC)
Expired: Mar 1, 2017, 1:15 AM CST
In force: 54 min
Issued by: NWS Lincoln, IL

Counties Champaign County, IL, Vermilion County, IL

The radar

The Lincoln radar (KILX), 113 km from the middle of the area, began a volume at 06:25 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.

What was reported inside it

Time	Report	Where	Remark
Mar 1, 12:26 AM CST	HAIL 0.88	Philo, IL
Mar 1, 12:45 AM CST	TSTM WND DMG	Danville, IL	EM REPORTS MULTIPLE POWER LINES AND LARGE TREE LIMBS DOWNED THROUGHOUT THE CITY.
Mar 1, 12:45 AM CST	TSTM WND GST 50	3 S Danville, IL	RECORDED AT EMA HEADQUARTERS.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 6.4 hours before the alert went out and 51 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: 687 J/kg
Mixed-layer CIN: -73 J/kg
Mixed-layer LCL: 887 m above ground
0-6 km bulk shear: 72 kt
0-1 km storm-relative helicity: 395 m²/s²
0-3 km storm-relative helicity: 431 m²/s²
Significant tornado parameter: 1.6
Supercell composite: 6.7

Open this sounding in Storm Lab

The text

As transmitted.

105 
WWUS83 KILX 010621
SPSILX

Special Weather Statement
National Weather Service Lincoln IL
1221 AM CST WED MAR 1 2017
 
ILZ044>046-054-055-057-010715-
Moultrie-Piatt-Edgar-Champaign-Douglas-Vermilion-
1221 AM CST WED MAR 1 2017

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN PIATT...VERMILION...
NORTHERN EDGAR...CHAMPAIGN AND NORTHERN DOUGLAS COUNTIES UNTIL 115 AM
CST...

At 1220 AM CST, trained weather spotters reported strong
thunderstorms along a line extending from Hoopeston to 7 miles north
of Atwood. Movement was east at 65 mph.

Dime size hail and wind gusts of 50 to 55 mph will be possible with
these storms.

Locations impacted include...
Champaign, Danville, Tuscola, Urbana, Savoy, Hoopeston, St. Joseph,
Georgetown, Tolono, Westville, Tilton, Villa Grove, Catlin, Oakwood,
Philo, Chrisman, Rossville, Sidney, Atwood and Homer.

This includes the following highways...
 Interstate 57 between mile markers 211 and 233.
 Interstate 74 between mile markers 181 and 220.

A tornado watch remains in effect until 400 AM CST for central and
east central Illinois.

LAT...LON 3979 8863 4040 8799 4040 8793 4045 8793
      4049 8789 4049 8753 3976 8753
TIME...MOT...LOC 0620Z 257DEG 73KT 4047 8768 3990 8842 

$$

Shimon

The office that day

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

Issued	Product	Office	Counties	Lasted
Feb 28, 6:27 PM CST	Severe Thunderstorm Warning	ILX	Shelby	28 min
Feb 28, 6:54 PM CST	Severe Thunderstorm Warning	ILX	Coles, Douglas, Moultrie	10 min
Feb 28, 7:38 PM CST	Severe Thunderstorm Warning	ILX	Clay, Jasper, Richland	67 min
Feb 28, 8:00 PM CST	Special Weather Statement	ILX	Marshall	30 min
Feb 28, 8:34 PM CST	Tornado Warning	ILX	Clay, Richland	41 min
Feb 28, 9:04 PM CST	Tornado Warning	ILX	Crawford, Lawrence, Richland	41 min
Feb 28, 9:29 PM CST	Tornado Warning	ILX	Cass, Schuyler	23 min
Feb 28, 9:50 PM CST	Special Weather Statement	ILX	Marshall, Peoria, Tazewell, Woodford	40 min
Feb 28, 10:32 PM CST	Special Weather Statement	ILX	McLean	28 min
Feb 28, 10:44 PM CST	Severe Thunderstorm Warning	ILX	McLean	46 min
Feb 28, 11:33 PM CST	Special Weather Statement	ILX	DeWitt, Piatt	57 min
Mar 1, 12:55 AM CST	Special Weather Statement	ILX	Coles, Douglas, Edgar, Moultrie	65 min
Mar 1, 2:27 AM CST	Special Weather Statement	ILX	Effingham, Jasper	48 min

Nearby

Special Weather Statements in Illinois, 2017 Every special weather statement 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.