Alert archive / Illinois / Severe Thunderstorm Warnings in 2016

Severe Thunderstorm Warning 32, NWS St. Louis, MO

April 27, 2016Adams County, Brown County, Illinois

NWS St. Louis, MO issued this severe thunderstorm warning at Apr 27, 2016, 9:45 PM CDT for Adams County, Brown County, Illinois. It was in force for 35 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: Apr 27, 2016, 9:45 PM CDT (02:45 UTC)
Expired: Apr 27, 2016, 10:20 PM CDT
In force: 35 min
Issued by: NWS St. Louis, MO
Area: Storm-based polygon
Tornado: Possible
Hail: 1.0 in
Wind: 60.0 mph

Counties Adams County, IL, Brown County, IL

The radar

The Lincoln radar (KILX), 135 km from the middle of the area, began a volume at 02:47 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
Apr 27, 10:01 PM CDT	HAIL 0.5	Golden, IL

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

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
Apr 27, 2:33 PM CDT	Tornado Watch	SPC	7 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 2.8 hours before the alert went out and 172 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 595 m above ground
0-6 km bulk shear: 55 kt
0-1 km storm-relative helicity: 338 m²/s²
0-3 km storm-relative helicity: 343 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.0

Open this sounding in Storm Lab

The text

As transmitted.

159 
WUUS53 KLSX 280245
SVRLSX
ILC001-009-280330-
/O.NEW.KLSX.SV.W.0032.160428T0245Z-160428T0330Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ST LOUIS MO
945 PM CDT WED APR 27 2016

THE NATIONAL WEATHER SERVICE IN ST LOUIS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  NORTHERN ADAMS COUNTY IN WEST CENTRAL ILLINOIS...
  NORTHWESTERN BROWN COUNTY IN WEST CENTRAL ILLINOIS...

* UNTIL 1030 PM CDT

* AT 944 PM CDT...A SEVERE THUNDERSTORM WAS LOCATED OVER MENDON...
  MOVING EAST AT 35 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...CLAYTON...GOLDEN...URSA...LORAINE...WOODVILLE...
  LIMA...COATSBURG...RIPLEY...LA PRAIRIE...PALOMA...FOWLER AND CHATTON.

THIS INCLUDES INTERSTATE 172 NEAR EXIT 19.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
BUILDING.

&&

A TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM CDT FOR WEST CENTRAL
ILLINOIS.

LAT...LON 4019 9091 4011 9091 4010 9070 4009 9070
      4008 9067 4005 9068 4002 9061 4000 9137
      4019 9141 4020 9133
TIME...MOT...LOC 0244Z 260DEG 30KT 4008 9124 

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

CARNEY

1 follow-up statement

794 
WWUS53 KLSX 280320
SVSLSX

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ST LOUIS MO
1020 PM CDT WED APR 27 2016

ILC001-009-280329-
/O.CAN.KLSX.SV.W.0032.000000T0000Z-160428T0330Z/
ADAMS IL-BROWN IL-
1020 PM CDT WED APR 27 2016

...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN ADAMS AND
NORTHWESTERN BROWN COUNTIES IS CANCELLED...
        
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND HAVE EXITED THE WARNED AREA. THEREFORE THE WARNING HAS
BEEN CANCELLED.  HOWEVER GUSTY WINDS ARE STILL POSSIBLE WITH THIS
THUNDERSTORM.

LAT...LON 4019 9091 4011 9091 4010 9070 4009 9070
      4008 9067 4005 9068 4002 9061 4000 9137
      4019 9141 4020 9133
TIME...MOT...LOC 0318Z 260DEG 30KT 4013 9086 

$$

CARNEY

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 27, 8:48 PM CDT	Severe Thunderstorm Warning	LSX	Adams	42 min
Apr 27, 9:15 PM CDT	Tornado Warning Tornado observed	LSX	Adams	30 min
Apr 27, 9:24 PM CDT	Severe Thunderstorm Warning	LSX	Calhoun, Jersey	38 min
Apr 27, 10:25 PM CDT	Severe Thunderstorm Warning	LSX	Adams, Brown, Pike	50 min
Apr 27, 10:26 PM CDT	Severe Thunderstorm Warning	LSX	Jersey, Macoupin, Madison	34 min
Apr 27, 10:34 PM CDT	Severe Thunderstorm Warning	LSX	Macoupin, Montgomery	41 min
Apr 27, 10:59 PM CDT	Severe Thunderstorm Warning	LSX	Monroe, Saint Clair	23 min

Nearby

Severe Thunderstorm Warnings in Illinois, 2016 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.