Alert archive / Illinois / Special Weather Statements in 2018

Special Weather Statement, NWS St. Louis, MO

June 19, 2018Fayette County, Illinois

NWS St. Louis, MO issued this special weather statement at Jun 19, 2018, 7:21 PM CDT for Fayette County, Illinois. It was in force for 24 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
Jun 19, 2018, 7:21 PM CDT (00:21 UTC)
Expired
Jun 19, 2018, 7:45 PM CDT
In force
24 min
Issued by
NWS St. Louis, MO

County Fayette County, IL

The radar

The Lincoln radar (KILX), 118 km from the middle of the area, began a volume at 00:21 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 115 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 2018-06-20Temperature 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°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 00:00Z on 2018-06-20The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -90 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1617 m above ground
0-6 km bulk shear
19 kt
0-1 km storm-relative helicity
-90 m²/s²
0-3 km storm-relative helicity
-97 m²/s²
Significant tornado parameter
0.0
Supercell composite
-0.1

Open this sounding in Storm Lab

The text

As transmitted.

684 
WWUS83 KLSX 200021
SPSLSX

Special Weather Statement
National Weather Service St Louis MO
721 PM CDT TUE JUN 19 2018
 
ILZ065-200045-
Fayette IL-
721 PM CDT TUE JUN 19 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN FAYETTE COUNTY UNTIL
745 PM CDT...

At 721 PM CDT, Doppler radar was tracking a strong thunderstorm near
Wrights Corner, moving east at 15 mph.

Half inch hail and winds in excess of 40 mph will be possible with
this storm.

Locations impacted include...
Wrights Corner.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

LAT...LON 3907 8898 3921 8904 3922 8881 3920 8880
      3907 8881
TIME...MOT...LOC 0021Z 260DEG 14KT 3916 8894 

$$

Byrd

The office that day

Everything else NWS St. Louis, MO issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 19, 7:12 PM CDTSevere Thunderstorm WarningLSXSaint Louis, City of Saint Louis48 min
Jun 20, 2:48 AM CDTAreal Flood AdvisoryLSXFranklin, Gasconade, Montgomery, Saint Charles, Warren7 hr
Jun 20, 4:05 PM CDTSpecial Weather StatementLSXLewis40 min
Jun 20, 5:09 PM CDTSpecial Weather StatementLSXMarion, Ralls66 min
Jun 20, 5:21 PM CDTSpecial Weather StatementLSXAudrain, Callaway54 min
Jun 20, 6:44 PM CDTSpecial Weather StatementLSXPike46 min
Jun 19, 8:12 PM CDTFlash Flood WarningLSXFayette6 hr
Jun 20, 2:02 AM CDTAreal Flood WarningLSXFayette9 hr
Jun 20, 6:16 PM CDTSpecial Weather StatementLSXAdams, Brown, Pike59 min

Nearby

Special Weather Statements in Illinois, 2018Every special weather statement in 2018

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.