Alert archive / Illinois / Special Weather Statements in 2021

Special Weather Statement, NWS Lincoln, IL

April 7, 2021Morgan County, Scott County, Illinois

NWS Lincoln, IL issued this special weather statement at Apr 7, 2021, 7:13 PM CDT for Morgan County, Scott County, Illinois. It was in force for 47 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
Apr 7, 2021, 7:13 PM CDT (00:13 UTC)
Expired
Apr 7, 2021, 8:00 PM CDT
In force
47 min
Issued by
NWS Lincoln, IL

Counties Morgan County, IL, Scott County, IL

The radar

The Lincoln radar (KILX), 111 km from the middle of the area, began a volume at 00:17 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, 0.2 hours before the alert went out and 170 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-pSkew-T log-p diagram, Lincoln, IL at 00:00Z on 2021-04-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 220 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 00:00Z on 2021-04-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 31 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
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
220 J/kg
Mixed-layer CIN
-46 J/kg
Mixed-layer LCL
1472 m above ground
0-6 km bulk shear
27 kt
0-1 km storm-relative helicity
31 m²/s²
0-3 km storm-relative helicity
108 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

The text

As transmitted.

314 
WWUS83 KILX 080013
SPSILX

Special Weather Statement
National Weather Service Lincoln IL
713 PM CDT Wed Apr 7 2021
 
ILZ049-050-080100-
Scott-Morgan-
713 PM CDT Wed Apr 7 2021

...SIGNIFICANT WEATHER ADVISORY FOR SCOTT AND MORGAN COUNTIES UNTIL
800 PM CDT...

At 712 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 6 miles southwest of Alsey to near Roodhouse to
near Greenfield. Movement was northeast at 50 mph.

Wind gusts of 50 to 55 mph will be possible with these storms.

Locations impacted include...
Jacksonville, Winchester, Alexander, Meredosia, Bluffs, Franklin,
Murrayville, Woodson, Chapin, Manchester, Alsey, Naples, Exeter,
Literberry, South Jacksonville, Concord, Glasgow, Lynnville, Sinclair
and Riggston.

This includes Interstate 72 between mile markers 43 and 79.
 
LAT...LON 3972 9064 3974 9062 3978 9061 3983 9057
      3987 9059 3987 9001 3952 8996 3952 9058
      3958 9058 3964 9061 3969 9064
TIME...MOT...LOC 0012Z 203DEG 43KT 3952 9053 3945 9030 3929 9017 

$$

Deubelbeiss

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 7, 7:49 PM CDTSevere Thunderstorm WarningILXCass, Menard, Morgan, Sangamon41 min
Apr 7, 8:27 PM CDTSpecial Weather StatementILXLogan48 min

Nearby

Special Weather Statements in Illinois, 2021Every special weather statement 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.