Alert archive / Illinois / Special Weather Statements in 2021

Special Weather Statement, NWS Lincoln, IL

May 27, 2021Cass County, Morgan County, Scott County, Illinois

NWS Lincoln, IL issued this special weather statement at May 27, 2021, 11:14 AM CDT for Cass County, Morgan County, Scott County, Illinois. It was in force for 46 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
May 27, 2021, 11:14 AM CDT (16:14 UTC)
Expired
May 27, 2021, 12:00 PM CDT
In force
46 min
Issued by
NWS Lincoln, IL

Counties Cass County, IL, Morgan County, IL, Scott County, IL

The radar

The Lincoln radar (KILX), 103 km from the middle of the area, began a volume at 16:15 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 12:00Z, 4.2 hours before the alert went out and 164 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 12:00Z on 2021-05-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 12:00Z on 2021-05-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 130 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1679 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
130 m²/s²
0-3 km storm-relative helicity
150 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at May 27, 11:03 AM CDT, 11 minutes earlier.

Area forecast discussion, May 27, 11:03 AM CDT, 11 minutes before
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Hazardous weather outlook, May 27, 5:02 AM CDT, 6 hours 12 minutes before
Hazardous Weather Outlook
National Weather Service Lincoln IL
502 AM CDT Thu May 27 2021

ILZ036-040-041-047-281015-
Cass-Fulton-Mason-Schuyler-
502 AM CDT Thu May 27 2021

This Hazardous Weather Outlook is for portions of central
Illinois and west central Illinois.

.DAY ONE...TODAY AND TONIGHT...

Severe thunderstorms and locally heavy rain are possible from
early this afternoon into early evening. Damaging winds, large
hail and isolated tornadoes are possible.

Minor flooding will continue along the Illinois River near Havana
and Beardstown downstream.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY...

Minor flooding will continue along the Illinois River at Havana
and Beardstown, though subsiding Friday at Havana, and Monday at
Beardstown.

Thunderstorms are possible Tuesday night.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed between noon and 9 pm. Please
relay any information about observed severe weather to the
National Weather Service while following all local, state and CDC
guidelines.

ILZ027>031-037-038-042>046-048>057-061>063-066>068-071>073-281015-
Champaign-Christian-Clark-Clay-Coles-Crawford-Cumberland-De Witt-
Douglas-Edgar-Effingham-Jasper-Knox-Lawrence-Logan-Macon-Marshall-
McLean-Menard-Morgan-Moultrie-Peoria-Piatt-Richland-Sangamon-
Scott-Shelby-Stark-Tazewell-Vermilion-Woodford-
502 AM CDT Thu May 27 2021

This Hazardous Weather Outlook is for portions of central
Illinois, east central Illinois, southeast Illinois and west
central Illinois.

.DAY ONE...TODAY AND TONIGHT...

Severe thunderstorms and locally heavy rain are possible from
early this afternoon into early evening. Damaging winds, large
hail and isolated tornadoes are possible.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY...

Thunderstorms are possible Tuesday night.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed between noon and 9 pm. Please
relay any information about observed severe weather to the
National Weather Service while following all local, state and CDC
guidelines.

25

In the hours before

Special weather statement, May 27, 10:13 AM CDT, 1 hour 1 minute before
Special Weather Statement
National Weather Service Lincoln IL
1013 AM CDT Thu May 27 2021

ILZ047-048-050-051-271545-
Sangamon-Morgan-Menard-Cass-
1013 AM CDT Thu May 27 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN MENARD...
NORTHWESTERN SANGAMON...SOUTHEASTERN CASS AND NORTHEASTERN MORGAN
COUNTIES UNTIL 1045 AM CDT...

At 1012 AM CDT, Doppler radar was tracking a strong thunderstorm near
Alexander, or near Jacksonville, moving northeast at 50 mph.

Pea size hail and wind gusts of 50 to 55 mph will be possible with
this storm.

Locations impacted include...
Springfield, Jacksonville, Alexander, Petersburg, Athens, New Berlin,
Ashland, Pleasant Plains, Woodson, Tallula, Literberry, South
Jacksonville, Jerome, Southern View, Leland Grove, Philadelphia,
Curran, Berlin, Newmansville and Sinclair.

This includes the following highways...
 Interstate 55 near mile marker 95.
 Interstate 72 between mile markers 62 and 96, and near mile marker
101.

LAT...LON 3960 9025 3983 9035 4009 8984 3976 8959
TIME...MOT...LOC 1512Z 240DEG 43KT 3978 9013

37
Special weather statement, May 27, 11:14 AM CDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
May 27, 10:13 AM CDTSpecial Weather StatementILXMenard, Morgan, Sangamon32 min
May 27, 11:58 AM CDTSevere Thunderstorm WarningILXMorgan, Sangamon62 min
May 27, 1:05 PM CDTSevere Thunderstorm WarningILXChristian, DeWitt, Logan, Macon, Sangamon, Shelby55 min
May 27, 3:06 PM CDTSevere Thunderstorm WarningILXClay, Effingham, Jasper54 min
May 27, 3:47 PM CDTSevere Thunderstorm WarningILXJasper, Richland58 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.