Alert archive / Indiana / Severe Thunderstorm Warnings in 2013

Severe Thunderstorm Warning 85, NWS Chicago, IL

June 25, 2013Porter County, Indiana

NWS Chicago, IL issued this severe thunderstorm warning at Jun 25, 2013, 7:46 PM CDT for Porter County, Indiana. It was in force for 29 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 25, 2013, 7:46 PM CDT (00:46 UTC)
Expired: Jun 25, 2013, 8:15 PM CDT
In force: 29 min
Issued by: NWS Chicago, IL
Area: Storm-based polygon
Hail: 1.0 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 00:47 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.

The watch it was issued in

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

Issued	Product	Office	Lasted
Jun 25, 3:06 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Lincoln, IL (KILX), launched 00:00Z, 0.8 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: 741 J/kg
Mixed-layer CIN: -164 J/kg
Mixed-layer LCL: 1385 m above ground
0-6 km bulk shear: 36 kt
0-1 km storm-relative helicity: 144 m²/s²
0-3 km storm-relative helicity: 234 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 7.9

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 25, 7:11 PM CDT, 35 minutes earlier.

Area forecast discussion, Jun 25, 7:11 PM CDT, 35 minutes before

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Hazardous weather outlook, Jun 25, 3:39 PM CDT, 4 hours 7 minutes before

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In the hours before

Special weather statement, Jun 25, 4:31 PM CDT, 3 hours 15 minutes before

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Special weather statement, Jun 25, 5:03 PM CDT, 2 hours 43 minutes before

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Special weather statement, Jun 25, 5:31 PM CDT, 2 hours 15 minutes before

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Special weather statement, Jun 25, 5:58 PM CDT, 1 hour 48 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 25, 11:28 PM CDT	River Flood Watch	LOT	Bureau, LaSalle	12 hr
Jun 25, 11:28 PM CDT	Special Weather Statement	LOT	Iroquois	47 min
Jun 25, 11:33 PM CDT	River Flood Advisory	LOT	Lee	11 hr
Jun 25, 11:33 PM CDT	River Flood Advisory	LOT	Kane, Kendall	12 hr
Jun 26, 12:11 AM CDT	Special Weather Statement	LOT	Iroquois	34 min
Jun 26, 2:53 AM CDT	Special Weather Statement	LOT	Boone	37 min
Jun 26, 3:52 AM CDT	Areal Flood Advisory	LOT	Boone, McHenry	6 hr
Jun 26, 4:33 AM CDT	Areal Flood Advisory	LOT	Cook, Lake, McHenry	6 hr
Jun 26, 5:26 AM CDT	Flash Flood Warning	LOT	Boone, Cook, Lake, McHenry	6 hr
Jun 26, 5:43 AM CDT	River Flood Warning	LOT	Winnebago	10 days
Jun 26, 7:13 AM CDT	Flash Flood Warning	LOT	Cook, DuPage, Kane	4 hr
Jun 26, 8:34 AM CDT	Severe Thunderstorm Warning	LOT	Ford, Grundy, Kankakee, Kendall, LaSalle, Livingston and 1 more	26 min
Jun 26, 8:37 AM CDT	River Flood Warning	LOT	Cook	56 hr
Jun 26, 8:37 AM CDT	River Flood Warning	LOT	Kane, McHenry	9 days
Jun 26, 9:03 AM CDT	Special Weather Statement	LOT	Ford, Iroquois, Kankakee, Will	57 min
Jun 26, 9:25 AM CDT	Special Weather Statement	LOT	Boone, DeKalb, McHenry, Winnebago	65 min
Jun 26, 9:43 AM CDT	Areal Flood Advisory	LOT	Boone, Winnebago	3 hr
Jun 26, 9:52 AM CDT	Special Weather Statement	LOT	Cook	38 min
Jun 26, 10:14 AM CDT	River Flood Warning	LOT	Winnebago	9 days
Jun 26, 10:23 AM CDT	Flash Flood Warning	LOT	Boone, Winnebago	6 hr
Jun 26, 10:37 AM CDT	River Flood Watch	LOT	Lee	5 hr
Jun 26, 10:38 AM CDT	Flash Flood Warning	LOT	Boone, Cook, DuPage, Kane, Lake, McHenry	6 hr
Jun 26, 10:56 AM CDT	River Flood Advisory	LOT	Boone	5 hr
Jun 26, 10:56 AM CDT	River Flood Advisory	LOT	Winnebago	5 hr
Jun 26, 11:06 AM CDT	River Flood Warning	LOT	Kane, Kendall	6 days
Jun 26, 11:19 AM CDT	River Flood Watch	LOT	Cook	22 hr
Jun 26, 11:22 AM CDT	River Flood Advisory	LOT	Lake	70 hr
Jun 26, 11:34 AM CDT	River Flood Advisory	LOT	Cook	23 hr
Jun 26, 11:44 AM CDT	River Flood Advisory	LOT	Bureau, LaSalle	23 hr
Jun 26, 1:37 PM CDT	River Flood Advisory	LOT	Lake	16 hr
Jun 26, 3:46 PM CDT	River Flood Warning	LOT	Ogle	5 days
Jun 26, 3:46 PM CDT	River Flood Warning	LOT	Lee	28 hr
Jun 26, 3:46 PM CDT	River Flood Warning	LOT	Boone	42 hr
Jun 26, 3:46 PM CDT	River Flood Warning	LOT	Winnebago	60 hr
Jun 26, 3:46 PM CDT	River Flood Warning	LOT	Winnebago	28 hr
Jun 26, 4:27 PM CDT	Flash Flood Warning	LOT	Boone, Cook, Kane, Lake, McHenry	18 hr
Jun 26, 7:25 AM CDT	Flash Flood Warning	LOT	Lake, Porter	6 hr
Jun 26, 4:11 PM CDT	Special Weather Statement	LOT	Jasper	34 min

Nearby

Severe Thunderstorm Warnings in Indiana, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.