Alert archive / Illinois / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 21, NWS Chicago, IL

May 28, 2013Grundy County, LaSalle County, Livingston County, Illinois

NWS Chicago, IL issued this severe thunderstorm warning at May 28, 2013, 7:58 PM CDT for Grundy County, LaSalle County, Livingston County, Illinois. It was in force for 47 min. 3 reports 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: May 28, 2013, 7:58 PM CDT (00:58 UTC)
Expired: May 28, 2013, 8:45 PM CDT
In force: 47 min
Issued by: NWS Chicago, IL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Grundy County, IL, LaSalle County, IL, Livingston County, IL

The radar

The Chicago radar (KLOT), 60 km from the middle of the area, began a volume at 00:59 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
May 28, 8:09 PM CDT	TSTM WND GST 50	3 S Marseilles, IL	ESTIMATED 50 MPH WIND GUSTS.
May 28, 8:18 PM CDT	TORNADO	2 Ene Mazon, IL	AN EF-0 TORNADO WITH MAXIMUM ESTIMATED WINDS OF 85 MPH TOUCHED DOWN NORTHEAST OF MAZON NEAR REED ROAD AND HIGGINS ROAD...WHERE A POWER POLE WAS BLOWN DOWN. THE TORNADO MOVED NORTHEAST AND BLEW DOWN PART OF A TREE ON HIGGINS ROAD JUST SOUTH OF SPRING ROAD. THRE
May 28, 8:20 PM CDT	TSTM WND DMG	3 W Coal City, IL	UPROOTED LARGE TREES. SOUTH OF THE IL-113 AND GORMAN RD INTERSECTION.

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

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 1.0 hours before the alert went out and 121 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: 2706 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 901 m above ground
0-6 km bulk shear: 24 kt
0-1 km storm-relative helicity: 151 m²/s²
0-3 km storm-relative helicity: 208 m²/s²
Significant tornado parameter: 1.5
Supercell composite: 8.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

961 
WUUS53 KLOT 290058
SVRLOT
ILC063-099-105-290145-
/O.NEW.KLOT.SV.W.0021.130529T0058Z-130529T0145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
758 PM CDT TUE MAY 28 2013

THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  GRUNDY COUNTY IN NORTHEAST ILLINOIS...
  SOUTHEASTERN LA SALLE COUNTY IN NORTH CENTRAL ILLINOIS...
  NORTHERN LIVINGSTON COUNTY IN CENTRAL ILLINOIS...

* UNTIL 845 PM CDT

* AT 755 PM CDT...A LINE OF SEVERE THUNDERSTORMS WAS LOCATED ALONG A
  LINE EXTENDING FROM SENECA TO 10 MILES SOUTH OF STREATOR...AND
  MOVING EAST AT 50 MPH.

  HAZARD...60 MPH WIND GUSTS AND PENNY SIZE HAIL.

  SOURCE...RADAR INDICATED.

  IMPACT...EXPECT DAMAGE TO ROOFS...SIDING AND TREES.

* LOCATIONS IMPACTED INCLUDE...
  SENECA...MORRIS...DWIGHT...MINOOKA...ODELL...MAZON...COAL CITY...
  GARDNER...DIAMOND...BRACEVILLE...RANSOM...KINSMAN...VERONA...CARBON
  HILL...EMINGTON...CAMPUS...SOUTH WILMINGTON AND EAST BROOKLYN.

OTHER LOCATIONS AFFECTED...
GEBHARD WOODS STATE PARK...GRUNDY COUNTY SPEEDWAY...FAIRGROUNDS...
ILLINI STATE PARK...WILLIAM G. STRATTON STATE PARK...

I-80 BETWEEN MILE MARKERS 98 AND 122.
I-55 BETWEEN MILE MARKERS 204 AND 233.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

TO REPORT SEVERE WEATHER CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY.
THEY WILL SEND YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN
CHICAGO.

&&

LAT...LON 4111 8893 4132 8878 4142 8862 4146 8853
      4146 8825 4136 8825 4098 8825 4091 8894
TIME...MOT...LOC 0058Z 260DEG 45KT 4128 8862 4101 8872

HAIL...0.75IN
WIND...60MPH

$$

MTF

4 follow-up statements

021 
WWUS53 KLOT 290111
SVSLOT

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
811 PM CDT TUE MAY 28 2013

ILC063-099-105-290145-
/O.CON.KLOT.SV.W.0021.000000T0000Z-130529T0145Z/
LA SALLE IL-LIVINGSTON IL-GRUNDY IL-
811 PM CDT TUE MAY 28 2013

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR GRUNDY...
NORTHERN LIVINGSTON AND SOUTHEASTERN LA SALLE COUNTIES UNTIL 845 PM
CDT...

AT 810 PM CDT...A LINE OF SEVERE THUNDERSTORMS WAS LOCATED ALONG A
LINE EXTENDING FROM SENECA TO 6 MILES SOUTHWEST OF ODELL...AND MOVING
EAST AT 50 MPH. RADAR ALSO INDICATED AN AREA OF WEAK ROTATION WITHIN 
THIS LINE 4 MILES SOUTHEAST OF SENECA.

HAZARD...60 MPH WIND GUSTS AND PENNY SIZE HAIL.

SOURCE...RADAR INDICATED.

IMPACT...EXPECT DAMAGE TO ROOFS...SIDING AND TREES.

LOCATIONS IMPACTED INCLUDE...
MORRIS...DWIGHT...MINOOKA...ODELL...MAZON...GARDNER...COAL CITY...
BRACEVILLE...DIAMOND...VERONA...EMINGTON...CARBON HILL...CAMPUS...
SOUTH WILMINGTON AND EAST BROOKLYN.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

TO REPORT SEVERE WEATHER CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY.
THEY WILL SEND YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN
CHICAGO.

&&

LAT...LON 4107 8893 4129 8872 4146 8853 4146 8825
      4098 8825 4091 8893
TIME...MOT...LOC 0110Z 260DEG 45KT 4132 8853 4097 8858

TORNADO...POSSIBLE
HAIL...0.75IN
WIND...60MPH

$$

184 
WWUS53 KLOT 290121
SVSLOT

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
821 PM CDT TUE MAY 28 2013

ILC063-099-105-290145-
/O.CON.KLOT.SV.W.0021.000000T0000Z-130529T0145Z/
LA SALLE IL-LIVINGSTON IL-GRUNDY IL-
821 PM CDT TUE MAY 28 2013

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR GRUNDY...
NORTHERN LIVINGSTON AND SOUTHEASTERN LA SALLE COUNTIES UNTIL 845 PM
CDT...

AT 821 PM CDT...A LINE OF SEVERE THUNDERSTORMS WAS LOCATED ALONG A
LINE EXTENDING FROM MORRIS TO GARDNER TO ODELL...AND MOVING EAST AT
50 MPH.

THESE ARE VERY DANGEROUS STORMS.

HAZARD...80 MPH WIND GUSTS AND PENNY SIZE HAIL.

SOURCE...RADAR INDICATED.

IMPACT...MOBILE HOMES WILL BE HEAVILY DAMAGED. FLYING DEBRIS WILL BE
         DANGEROUS TO PEOPLE AND ANIMALS. EXPECT CONSIDERABLE DAMAGE
         TO ROOFS...WINDOWS AND VEHICLES. EXTENSIVE TREE DAMAGE AND
         POWER OUTAGES ARE LIKELY.

LOCATIONS IMPACTED INCLUDE...
MINOOKA...BRACEVILLE...COAL CITY...DIAMOND...CARBON HILL...SOUTH
WILMINGTON...EAST BROOKLYN...EMINGTON AND CAMPUS.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

THIS IS AN EXTREMELY DANGEROUS SITUATION WITH TORNADO LIKE WIND
SPEEDS EXPECTED. MOBILE HOMES AND HIGH PROFILE VEHICLES ARE
ESPECIALLY SUSCEPTIBLE TO WINDS OF THIS MAGNITUDE AND MAY BE
OVERTURNED. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE
LOWEST FLOOR OF A BUILDING. THESE STORMS HAVE THE POTENTIAL TO CAUSE
SERIOUS INJURY AND SIGNIFICANT PROPERTY DAMAGE.

TO REPORT SEVERE WEATHER CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY.
THEY WILL SEND YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN
CHICAGO.

&&

LAT...LON 4101 8893 4111 8875 4126 8860 4146 8853
      4146 8825 4098 8825 4091 8893
TIME...MOT...LOC 0121Z 260DEG 45KT 4138 8835 4119 8827
          4099 8846

TORNADO...POSSIBLE
HAIL...0.75IN
WIND...80MPH

$$

MTF

926 
WWUS53 KLOT 290136
SVSLOT

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
836 PM CDT TUE MAY 28 2013

ILC099-290146-
/O.CAN.KLOT.SV.W.0021.000000T0000Z-130529T0145Z/
LA SALLE IL-
836 PM CDT TUE MAY 28 2013


...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN LA SALLE COUNTY
IS CANCELLED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE 
WARNED AREA.

LAT...LON 4091 8893 4114 8846 4142 8839 4146 8825
      4098 8825
TIME...MOT...LOC 0136Z 260DEG 45KT 4139 8827 4120 8819
          4100 8838

$$

ILC063-105-290145-
/O.CON.KLOT.SV.W.0021.000000T0000Z-130529T0145Z/
LIVINGSTON IL-GRUNDY IL-
836 PM CDT TUE MAY 28 2013

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN GRUNDY
AND NORTHERN LIVINGSTON COUNTIES UNTIL 845 PM CDT...

AT 833 PM CDT...A LINE OF SEVERE THUNDERSTORMS WAS LOCATED ALONG A
LINE EXTENDING FROM 6 MILES SOUTHWEST OF MINOOKA TO BRACEVILLE TO
ODELL...AND MOVING EAST AT 50 MPH.

THESE ARE VERY DANGEROUS STORMS.

HAZARD...80 MPH WIND GUSTS AND PENNY SIZE HAIL.

SOURCE...RADAR INDICATED.

IMPACT...MOBILE HOMES WILL BE HEAVILY DAMAGED. FLYING DEBRIS WILL BE
         DANGEROUS TO PEOPLE AND ANIMALS. EXPECT CONSIDERABLE DAMAGE
         TO ROOFS...WINDOWS AND VEHICLES. EXTENSIVE TREE DAMAGE AND
         POWER OUTAGES ARE LIKELY.

LOCATIONS IMPACTED INCLUDE...
MINOOKA AND CAMPUS.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

THIS IS AN EXTREMELY DANGEROUS SITUATION WITH TORNADO LIKE WIND
SPEEDS EXPECTED. MOBILE HOMES AND HIGH PROFILE VEHICLES ARE
ESPECIALLY SUSCEPTIBLE TO WINDS OF THIS MAGNITUDE AND MAY BE
OVERTURNED. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE
LOWEST FLOOR OF A BUILDING. THESE STORMS HAVE THE POTENTIAL TO CAUSE
SERIOUS INJURY AND SIGNIFICANT PROPERTY DAMAGE.

TO REPORT SEVERE WEATHER CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY.
THEY WILL SEND YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN
CHICAGO.

&&

LAT...LON 4091 8893 4114 8846 4142 8839 4146 8825
      4098 8825
TIME...MOT...LOC 0136Z 260DEG 45KT 4139 8827 4120 8819
          4100 8838

TORNADO...POSSIBLE
HAIL...0.75IN
WIND...80MPH

$$

995 
WWUS53 KLOT 290144 RRA
SVSLOT

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
844 PM CDT TUE MAY 28 2013

ILC063-105-290155-
/O.EXP.KLOT.SV.W.0021.000000T0000Z-130529T0145Z/
LIVINGSTON IL-GRUNDY IL-
844 PM CDT TUE MAY 28 2013


...THE SEVERE THUNDERSTORM WARNING FOR EASTERN GRUNDY AND NORTHERN
LIVINGSTON COUNTIES HAS EXPIRED...

THE LINE OF STORMS WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE
WARNED AREA.

TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN CHICAGO.

LAT...LON 4091 8893 4114 8846 4142 8839 4146 8825
      4098 8825
TIME...MOT...LOC 0145Z 260DEG 45KT 4140 8812 4121 8804
          4101 8823

$$

MTF

The office that day

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

Issued	Product	Office	Counties	Lasted
May 28, 7:13 PM CDT	Special Weather Statement	LOT	LaSalle	47 min
May 28, 7:28 PM CDT	Special Weather Statement	LOT	DeKalb	32 min
May 28, 8:06 PM CDT	Severe Thunderstorm Warning	LOT	Kendall, Will	24 min
May 28, 8:10 PM CDT	Special Marine Warning	LOT		2 hr
May 28, 8:18 PM CDT	Severe Thunderstorm Warning	LOT	Kankakee, Will	57 min
May 28, 8:22 PM CDT	Flash Flood Warning	LOT	Cook, DuPage, Will	6 hr
May 28, 8:23 PM CDT	Tornado Warning	LOT	Grundy, Will	37 min
May 28, 8:28 PM CDT	Severe Thunderstorm Warning	LOT	Cook, DuPage, Will	62 min
May 28, 8:54 PM CDT	Special Marine Warning	LOT		2 hr
May 28, 9:05 PM CDT	Special Weather Statement	LOT	Ford, Iroquois	40 min
May 28, 9:27 PM CDT	River Flood Warning	LOT	Iroquois	13 hr
May 28, 10:19 PM CDT	River Flood Advisory	LOT	Will	12 hr
May 28, 11:35 PM CDT	River Flood Advisory	LOT	Grundy	16 hr
May 29, 12:39 AM CDT	Special Weather Statement	LOT	Livingston	36 min
May 29, 1:17 AM CDT	Special Weather Statement	LOT	Ford, Iroquois, Kankakee	28 min
May 29, 1:49 AM CDT	Special Weather Statement	LOT	Iroquois, Kankakee	41 min
May 29, 3:38 AM CDT	Marine Dense Fog Advisory	LOT		48 hr
May 29, 6:20 AM CDT	River Flood Warning	LOT	Livingston	13 hr

Nearby

Severe Thunderstorm Warnings in Illinois, 2013 Every severe thunderstorm warning in 2013

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.