Alert archive / Illinois / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 101, NWS St. Louis, MO

June 10, 2018Adams County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Jun 10, 2018, 3:36 PM CDT for Adams County, Illinois. It was in force for 24 min. 1 report 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: Jun 10, 2018, 3:36 PM CDT (20:36 UTC)
Expired: Jun 10, 2018, 4:00 PM CDT
In force: 24 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Hail: 1.0 in
Wind: 60.0 mph

County Adams County, IL

The radar

The Lincoln radar (KILX), 155 km from the middle of the area, began a volume at 20:36 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
Jun 10, 3:48 PM CDT	HAIL 0.75	3 Ssw Loraine, IL	LOCATION APPROXIMATE. TIME ESTIMATED FROM RADAR. REPORT RELAYED BY LOCAL BROADCAST MEDIA. DIME TO PENNY SIZE HAIL IN NORTHERN ADAMS COUNTY.

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

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 8.6 hours before the alert went out and 176 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: 351 J/kg
Mixed-layer CIN: -128 J/kg
Mixed-layer LCL: 594 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 257 m²/s²
0-3 km storm-relative helicity: 359 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 8.3

Open this sounding in Storm Lab

The text

As transmitted.

599 
WUUS53 KLSX 102036
SVRLSX
ILC001-102115-
/O.NEW.KLSX.SV.W.0101.180610T2036Z-180610T2115Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service St Louis MO
336 PM CDT SUN JUN 10 2018

The National Weather Service in St Louis has issued a

* Severe Thunderstorm Warning for...
  Northern Adams County in west central Illinois...

* Until 415 PM CDT.

* At 336 PM CDT, a severe thunderstorm was located near Mendon,
  moving east at 25 mph.

  HAZARD...60 mph wind gusts and quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Hail damage to vehicles is expected. Expect wind damage 
           to roofs, siding, and trees.

* Locations impacted include...
  Camp Point, Mendon, Golden, Ursa, Loraine, Woodville, Lima,
  Coatsburg, La Prairie, Paloma and Chatton.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4019 9099 4001 9099 4002 9143 4020 9142
TIME...MOT...LOC 2036Z 273DEG 21KT 4014 9124 

HAIL...1.00IN
WIND...60MPH
 
$$

Kanofsky

1 follow-up statement

347 
WWUS53 KLSX 102100
SVSLSX

Severe Weather Statement
National Weather Service St Louis MO
400 PM CDT SUN JUN 10 2018

ILC001-102109-
/O.CAN.KLSX.SV.W.0101.000000T0000Z-180610T2115Z/
Adams IL-
400 PM CDT SUN JUN 10 2018

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN ADAMS COUNTY IS
CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.  However gusty winds and
heavy rain are still possible with this thunderstorm.

LAT...LON 4019 9099 4001 9099 4002 9143 4020 9142
TIME...MOT...LOC 2058Z 273DEG 21KT 4013 9106 

$$

Kanofsky

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 10, 1:29 PM CDT	Special Weather Statement	LSX	Montgomery	46 min
Jun 10, 2:09 PM CDT	Severe Thunderstorm Warning	LSX	Fayette	28 min
Jun 10, 3:24 PM CDT	Special Weather Statement	LSX	Adams	36 min
Jun 10, 4:17 PM CDT	Special Weather Statement	LSX	Montgomery	28 min
Jun 10, 4:38 PM CDT	Special Weather Statement	LSX	Fayette	22 min
Jun 10, 5:15 PM CDT	Severe Thunderstorm Warning	LSX	Adams, Brown	29 min
Jun 10, 6:42 PM CDT	Flash Flood Warning	LSX	Fayette	6 hr

Nearby

Severe Thunderstorm Warnings in Illinois, 2018 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.