Alert archive / Illinois / Special Weather Statements in 2016

Special Weather Statement, NWS Lincoln, IL

July 18, 20167 counties in Illinois

NWS Lincoln, IL issued this special weather statement at Jul 18, 2016, 7:21 PM CDT for 7 counties in Illinois. It was in force for 54 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Jul 18, 2016, 7:21 PM CDT (00:21 UTC)
Expired: Jul 18, 2016, 8:15 PM CDT
In force: 54 min
Issued by: NWS Lincoln, IL

Counties Champaign County, IL, Knox County, IL, Marshall County, IL, McLean County, IL, Peoria County, IL, Stark County, IL, Woodford County, IL

The radar

The Lincoln radar (KILX), 77 km from the middle of the area, began a volume at 00:23 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, 0.4 hours before the alert went out and 79 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: 1325 J/kg
Mixed-layer CIN: -27 J/kg
Mixed-layer LCL: 1247 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 32 m²/s²
0-3 km storm-relative helicity: 45 m²/s²
Significant tornado parameter: 0.1
Supercell composite: 0.9

Open this sounding in Storm Lab

The text

As transmitted.

039 
WWUS83 KILX 190021
SPSILX

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE LINCOLN IL
721 PM CDT MON JUL 18 2016
 
ILZ027>031-037-038-043>046-190115-
STARK-PEORIA-PIATT-DE
WITT-CHAMPAIGN-MARSHALL-KNOX-VERMILION-TAZEWELL-MCLEAN-WOODFORD-
721 PM CDT MON JUL 18 2016

...FUNNEL CLOUDS SIGHTED OVER KNOX AND STARK COUNTY ILLINOIS...

ATMOSPHERIC CONDITIONS EXIST TODAY ACROSS AN AREA FROM JUST
SOUTHEAST OF QUAD CITIES TO JUST NORTH OF CHAMPAIGN ILLINOIS THAT
FAVOR THE POSSIBLE FORMATION OF WEAK CIRCULATIONS ON A PRE-EXISTING
BOUNDARY. SOME OF THESE CIRCULATIONS ARE OCCURRING UNDERNEATH
DEVELOPING SHOWERS AND THUNDERSTORMS...WHERE A FUNNEL CLOUD MAY
DEVELOP. ONCE THE RAIN BEGINS...THE FUNNEL CLOUD DISSIPATES.

LOW HANGING CLOUDS CAN ALSO APPEAR TO DIP UP AND DOWN AT TIMES...BUT
THEY WILL NOT SHOW SIGNS OF ANY RAPID ROTATION. AN ACTUAL FUNNEL
CLOUD WILL EXHIBIT SPINNING IN A COUNTER-CLOCKWISE DIRECTION.

IN RARE INSTANCES THESE FUNNELS MAY BRIEFLY TOUCHDOWN. STAY ALERT
AND BE PREPARED TO MOVE TO A SAFE SHELTER IF A FUNNEL CLOUD
APPROACHES THE GROUND.

LAT...LON 4115 8964 4110 8905 4093 8905 4092 8897
      4075 8893 4075 8858 4062 8858 4061 8846
      4040 8846 4040 8794 4049 8793 4049 8753
      4009 8814 4030 8897 4094 9044 4115 9044
      4115 8987 4123 8986 4124 8964
TIME...MOT...LOC 0021Z 240DEG 49KT 4069 8893 

$$

ONTON

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 18, 8:21 PM CDT	Special Weather Statement	ILX	McLean	24 min
Jul 19, 4:38 PM CDT	Special Weather Statement	ILX	Fulton, Mason	52 min
Jul 19, 5:14 PM CDT	Special Weather Statement	ILX	Knox	46 min
Jul 19, 5:58 PM CDT	Severe Thunderstorm Warning	ILX	Schuyler	36 min
Jul 19, 6:05 PM CDT	Special Weather Statement	ILX	Marshall, Woodford	40 min
Jul 19, 6:22 PM CDT	Severe Thunderstorm Warning	ILX	Morgan, Scott	32 min

Nearby

Special Weather Statements in Illinois, 2016 Every special weather statement in 2016

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.