Alert archive / Illinois / Tornado Warnings in 2013

Tornado Warning 13, NWS Chicago, IL

November 17, 2013Boone County, McHenry County, Illinois

NWS Chicago, IL issued this tornado warning at Nov 17, 2013, 9:36 AM CST for Boone County, McHenry County, Illinois. It was in force for 39 min. 2 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
Nov 17, 2013, 9:36 AM CST (15:36 UTC)
Expired
Nov 17, 2013, 10:15 AM CST
In force
39 min
Issued by
NWS Chicago, IL
Area
Storm-based polygon
Tornado
Radar indicated
Hail
1.0 in

Counties Boone County, IL, McHenry County, IL

The radar

The Milwaukee radar (KMKX), 68 km from the middle of the area, began a volume at 15:36 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

TimeReportWhereRemark
Nov 17, 9:50 AM CSTFUNNEL CLOUD3 W Hebron, IL
Nov 17, 10:08 AM CSTTSTM WND GST 54Harvard, 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.

IssuedProductOfficeLasted
Nov 17, 8:40 AM CSTTornado Watch PDSSPC7 hr

The nearest sounding before it

Davenport, (KDVN), launched 12:00Z, 3.6 hours before the alert went out and 175 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, Davenport, at 12:00Z on 2013-11-17Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 783 joules per kilogram.LCLLFCEL10008507005003002001001 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, Davenport, at 12:00Z on 2013-11-17The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 248 square meters per square second.1939587897117Sfc1 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
783 J/kg
Mixed-layer CIN
-24 J/kg
Mixed-layer LCL
474 m above ground
0-6 km bulk shear
73 kt
0-1 km storm-relative helicity
248 m²/s²
0-3 km storm-relative helicity
280 m²/s²
Significant tornado parameter
0.0
Supercell composite
4.2

Open this sounding in Storm Lab

The text

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

646 
WFUS53 KLOT 171536
TORLOT
ILC007-111-171615-
/O.NEW.KLOT.TO.W.0013.131117T1536Z-131117T1615Z/

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
936 AM CST SUN NOV 17 2013

THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A

* TORNADO WARNING FOR...
  EAST CENTRAL BOONE COUNTY IN NORTH CENTRAL ILLINOIS...
  NORTHWESTERN MCHENRY COUNTY IN NORTHEAST ILLINOIS...

* UNTIL 1015 AM CST

* AT 933 AM CST...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A
  TORNADO WAS LOCATED 5 MILES NORTHEAST OF BELVIDERE...AND MOVING
  NORTHEAST AT 50 MPH.

  HAZARD...TORNADO AND QUARTER SIZE HAIL.

  SOURCE...RADAR INDICATED ROTATION.

  IMPACT...MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE TO
           ROOFS...WINDOWS AND VEHICLES WILL OCCUR. FLYING DEBRIS
           WILL BE DEADLY TO PEOPLE AND ANIMALS. TREE DAMAGE IS
           LIKELY.

* THIS DANGEROUS STORM WILL BE NEAR...
  HARVARD AROUND 945 AM CST.
  HEBRON AROUND 1000 AM CST.
  RICHMOND AROUND 1005 AM CST.



PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4226 8876 4230 8883 4250 8864 4250 8821
TIME...MOT...LOC 1536Z 232DEG 42KT 4232 8873

TORNADO...RADAR INDICATED
HAIL...1.00IN

$$

BMD
3 follow-up statements
250 
WWUS53 KLOT 171543
SVSLOT

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
943 AM CST SUN NOV 17 2013

ILC007-171553-
/O.CAN.KLOT.TO.W.0013.000000T0000Z-131117T1615Z/
BOONE IL-
943 AM CST SUN NOV 17 2013


...THE TORNADO WARNING FOR EAST CENTRAL BOONE COUNTY IS CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED 
AREA.

LAT...LON 4250 8821 4248 8825 4232 8870 4239 8870
      4250 8861
TIME...MOT...LOC 1543Z 232DEG 42KT 4237 8864

$$

ILC111-171615-
/O.CON.KLOT.TO.W.0013.000000T0000Z-131117T1615Z/
MCHENRY IL-
943 AM CST SUN NOV 17 2013

...A TORNADO WARNING REMAINS IN EFFECT FOR NORTHWESTERN MCHENRY
COUNTY UNTIL 1015 AM CST...

AT 940 AM CST...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR CAPRON...AND MOVING NORTHEAST AT 50 MPH.

HAZARD...TORNADO AND SMALL HAIL.

SOURCE...RADAR INDICATED ROTATION.

IMPACT...MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE TO
         ROOFS...WINDOWS AND VEHICLES WILL OCCUR. FLYING DEBRIS WILL
         BE DEADLY TO PEOPLE AND ANIMALS. TREE DAMAGE IS LIKELY.

THIS DANGEROUS STORM WILL BE NEAR...
  HEBRON AROUND 1000 AM CST.
  RICHMOND AROUND 1005 AM CST.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4250 8821 4248 8825 4232 8870 4239 8870
      4250 8861
TIME...MOT...LOC 1543Z 232DEG 42KT 4237 8864


TORNADO...RADAR INDICATED
HAIL...<.75IN

$$

BMD
504 
WWUS53 KLOT 171554
SVSLOT

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
954 AM CST SUN NOV 17 2013

ILC111-171615-
/O.CON.KLOT.TO.W.0013.000000T0000Z-131117T1615Z/
MCHENRY IL-
954 AM CST SUN NOV 17 2013

...A TORNADO WARNING REMAINS IN EFFECT FOR NORTH CENTRAL MCHENRY
COUNTY UNTIL 1015 AM CST...

AT 951 AM CST...A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO
WAS LOCATED NEAR HEBRON...AND MOVING NORTHEAST AT 55 MPH.

HAZARD...TORNADO AND SMALL HAIL.

SOURCE...RADAR INDICATED ROTATION.

IMPACT...MOBILE HOMES WILL BE DAMAGED OR DESTROYED. DAMAGE TO
         ROOFS...WINDOWS AND VEHICLES WILL OCCUR. FLYING DEBRIS WILL
         BE DEADLY TO PEOPLE AND ANIMALS. TREE DAMAGE IS LIKELY.

THIS DANGEROUS STORM WILL AFFECT MAINLY RURAL AREAS OF NORTH CENTRAL
MCHENRY COUNTY.


PRECAUTIONARY/PREPAREDNESS ACTIONS...

TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A
STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR
OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT
YOURSELF FROM FLYING DEBRIS.

&&

LAT...LON 4250 8827 4242 8854 4244 8859 4250 8856
      4250 8842
TIME...MOT...LOC 1554Z 233DEG 47KT 4247 8848


TORNADO...RADAR INDICATED
HAIL...<.75IN

$$
969 
WWUS53 KLOT 171601
SVSLOT

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1001 AM CST SUN NOV 17 2013

ILC111-171611-
/O.CAN.KLOT.TO.W.0013.000000T0000Z-131117T1615Z/
MCHENRY IL-
1001 AM CST SUN NOV 17 2013


...THE TORNADO WARNING FOR NORTH CENTRAL MCHENRY COUNTY IS
CANCELLED...

THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.

LAT...LON 4250 8827 4242 8854 4244 8859 4250 8856
      4250 8842
TIME...MOT...LOC 1601Z 233DEG 47KT 4252 8838

$$

BMD

The office that day

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

IssuedProductOfficeCountiesLasted
Nov 17, 3:09 AM CSTHigh Wind WarningLOTDuPage, Ford, Grundy, Iroquois, Kankakee, Kendall and 2 more17 hr
Nov 17, 4:10 AM CSTGale WarningLOT41 hr
Nov 17, 4:10 AM CSTGale WarningLOT35 hr
Nov 17, 4:10 AM CSTStorm WarningLOT23 hr
Nov 17, 5:00 AM CSTSpecial Weather StatementLOTLake15 min
Nov 17, 6:02 AM CSTSpecial Weather StatementLOTCook, Will28 min
Nov 17, 10:16 AM CSTTornado WarningLOTMcHenry44 min
Nov 17, 10:36 AM CSTSevere Thunderstorm WarningLOTLaSalle39 min
Nov 17, 11:07 AM CSTSevere Thunderstorm WarningLOTDuPage, Grundy, Kane, Kendall, LaSalle, Will23 min
Nov 17, 11:11 AM CSTSevere Thunderstorm WarningLOTBoone, McHenry, Ogle, Winnebago34 min
Nov 17, 11:12 AM CSTTornado Warning Tornado observedLOTLaSalle, Livingston48 min
Nov 17, 11:14 AM CSTSpecial Marine WarningLOT2 hr
Nov 17, 11:25 AM CSTSevere Thunderstorm WarningLOTCook, DuPage, Lake50 min
Nov 17, 11:33 AM CSTTornado Warning Tornado observedLOTGrundy, LaSalle, Livingston42 min
Nov 17, 11:44 AM CSTFlash Flood WarningLOTCook, DuPage, Kane, Kendall, Lake, Will4 hr
Nov 17, 12:07 PM CSTSevere Thunderstorm WarningLOTDeKalb, LaSalle, Lee, Ogle38 min
Nov 17, 12:14 PM CSTTornado WarningLOTGrundy, Kankakee, Will46 min
Nov 17, 12:27 PM CSTSevere Thunderstorm WarningLOTCook, Will48 min
Nov 17, 12:32 PM CSTSevere Thunderstorm WarningLOTBoone, DeKalb, Kane, Kendall, LaSalle, McHenry43 min
Nov 17, 12:41 PM CSTSevere Thunderstorm WarningLOTIroquois, Kankakee, Will64 min
Nov 17, 12:46 PM CSTSpecial Marine WarningLOT119 min
Nov 17, 12:46 PM CSTTornado WarningLOTCook, Will44 min
Nov 17, 12:58 PM CSTSevere Thunderstorm WarningLOTCook, DuPage, Kane, Lake, McHenry47 min
Nov 17, 1:02 PM CSTSevere Thunderstorm WarningLOTDuPage, Grundy, Kankakee, Kendall, LaSalle, Livingston and 1 more43 min
Nov 17, 1:08 PM CSTTornado WarningLOTIroquois37 min
Nov 17, 1:15 PM CSTSevere Thunderstorm WarningLOTIroquois60 min

Nearby

Tornado Warnings in Illinois, 2013Every tornado warning in 2013Tornadoes 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.