Alert archive / Indiana / Severe Thunderstorm Warnings in 2014

Severe Thunderstorm Warning 75, NWS Chicago, IL

June 23, 2014Porter County, Indiana

NWS Chicago, IL issued this severe thunderstorm warning at Jun 23, 2014, 3:11 PM CDT for Porter County, Indiana. It was in force for 34 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: Jun 23, 2014, 3:11 PM CDT (20:11 UTC)
Expired: Jun 23, 2014, 3:45 PM CDT
In force: 34 min
Issued by: NWS Chicago, IL
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Porter County, IN

The radar

The Chicago radar (KLOT), 85 km from the middle of the area, began a volume at 20:11 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 12:00Z, 8.2 hours before the alert went out and 198 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: 284 J/kg
Mixed-layer CIN: -83 J/kg
Mixed-layer LCL: 818 m above ground
0-6 km bulk shear: 19 kt
0-1 km storm-relative helicity: 52 m²/s²
0-3 km storm-relative helicity: 67 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Chicago, IL wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 23, 2:56 PM CDT, 15 minutes earlier.

Area forecast discussion, Jun 23, 2:56 PM CDT, 15 minutes before

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Hazardous weather outlook, Jun 23, 11:58 AM CDT, 3 hours 13 minutes before

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In the hours before

Special weather statement, Jun 23, 1:37 PM CDT, 1 hour 34 minutes before

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Special weather statement, Jun 23, 2:35 PM CDT, 36 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
235 PM CDT MON JUN 23 2014

ILZ022-023-INZ001-002-010-232015-
KANKAKEE IL-LAKE IN-NEWTON IN-PORTER IN-WILL IL-
235 PM CDT MON JUN 23 2014

...SPECIAL WEATHER STATEMENT...

AT 230 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM HOBART TO MOMENCE...
MOVING NORTHEAST AT 25 MPH.

UP TO PENNY SIZE HAIL...WINDS TO 50 MPH...FREQUENT CLOUD TO GROUND
LIGHTNING...TORRENTIAL DOWNPOURS AND MINOR STREET FLOODING ARE
POSSIBLE WITH THESE STORMS.

CITIES AND TOWNS AFFECTED...
  HOBART...             CROWN POINT...        MERRILLVILLE...
  CEDAR LAKE...         ST. JOHN...           MOMENCE...
  SCHERERVILLE...       GRIFFITH...           NEW CHICAGO...

OTHER LOCATIONS AFFECTED...
ILLIANA MOTOR SPEEDWAY...INDIANA DUNES STATE PARK...INDIANA
UNIVERSITY NORTHWEST...LAKE COUNTY FAIRGROUNDS...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

GUSTY WINDS MAY CAUSE SMALL BRANCHES TO BE BLOWN DOWN...AND LOOSE
OBJECTS TO BLOW AROUND. STAY AWAY FROM HIGH OBJECTS OUTDOORS SUCH AS
TREES. HEAVY RAINFALL COULD LEAD TO STANDING WATER ON ROADWAYS AND
POOR VISIBILITY. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THESE
STORMS HAVE PASSED.

&&

LAT...LON 4126 8719 4122 8727 4119 8727 4113 8769
      4154 8743 4166 8713 4166 8710 4169 8701
TIME...MOT...LOC 1934Z 234DEG 22KT 4153 8726 4118 8754

RC

Special weather statement, Jun 23, 2:58 PM CDT, 13 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
258 PM CDT MON JUN 23 2014

INZ001-002-010-011-232030-
JASPER IN-LAKE IN-NEWTON IN-PORTER IN-
258 PM CDT MON JUN 23 2014

...SPECIAL WEATHER STATEMENT...

AT 254 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM OGDEN DUNES TO
LINCOLN HILLS TO CONRAD...MOVING EAST NORTHEAST AT 25 MPH.

UP TO PENNY SIZE HAIL...WINDS TO 50 MPH...FREQUENT CLOUD TO GROUND
LIGHTNING...TORRENTIAL DOWNPOURS AND MINOR STREET FLOODING ARE
POSSIBLE WITH THESE STORMS.

CITIES AND TOWNS AFFECTED...
  SUMAVA RESORTS...     THAYER...             PORTAGE...
  WHEELER...            OGDEN DUNES...
  LAKES OF THE FOUR SEASONS...                CONRAD...
  LAKE VILLAGE...       LAKE STATION...

OTHER LOCATIONS AFFECTED...
INDIANA DUNES STATE PARK...INDIANA UNIVERSITY NORTHWEST...LAKE COUNTY
FAIRGROUNDS...PORTER COUNTY FAIRGROUNDS...VALPARAISO UNIVERSITY...

PRECAUTIONARY/PREPAREDNESS ACTIONS...

GUSTY WINDS MAY CAUSE SMALL BRANCHES TO BE BLOWN DOWN...AND LOOSE
OBJECTS TO BLOW AROUND. STAY AWAY FROM HIGH OBJECTS OUTDOORS SUCH AS
TREES. HEAVY RAINFALL COULD LEAD TO STANDING WATER ON ROADWAYS AND
POOR VISIBILITY. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THESE
STORMS HAVE PASSED.

&&

LAT...LON 4171 8693 4113 8693 4105 8748 4144 8740
      4163 8732 4163 8722 4164 8717 4166 8715
      4166 8710 4171 8693 4173 8691 4172 8690
TIME...MOT...LOC 1958Z 257DEG 21KT 4167 8714 4145 8712
          4109 8736

RC

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 22, 7:44 PM CDT	Dense Fog Advisory	LOT	Lake	10 hr
Jun 22, 7:49 PM CDT	Special Weather Statement	LOT	Grundy, LaSalle, Lee, Livingston	56 min
Jun 22, 8:19 PM CDT	River Flood Advisory	LOT	Kane, Kendall	6 days
Jun 22, 8:43 PM CDT	Special Weather Statement	LOT	Grundy	32 min
Jun 22, 8:49 PM CDT	River Flood Warning	LOT	LaSalle	30 hr
Jun 23, 1:37 PM CDT	Special Weather Statement	LOT	Will	38 min
Jun 23, 6:09 PM CDT	Severe Thunderstorm Warning	LOT	Iroquois	39 min
Jun 23, 6:16 PM CDT	Flash Flood Warning	LOT	Iroquois	6 hr
Jun 23, 2:35 PM CDT	Special Weather Statement	LOT	Lake	40 min
Jun 23, 4:03 PM CDT	Special Weather Statement	LOT	Newton	27 min
Jun 23, 4:47 PM CDT	Flash Flood Warning	LOT	Jasper, Newton	6 hr
Jun 23, 5:39 PM CDT	Areal Flood Advisory	LOT	Benton	4 hr
Jun 23, 6:01 PM CDT	Special Weather Statement	LOT	Benton	29 min

Nearby

Severe Thunderstorm Warnings in Indiana, 2014 Every severe thunderstorm warning in 2014

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.