Alert archive / Indiana / Severe Thunderstorm Warnings in 2009

Severe Thunderstorm Warning 36, NWS Chicago, IL

June 19, 2009Lake County, Porter County, Indiana

NWS Chicago, IL issued this severe thunderstorm warning at Jun 19, 2009, 2:51 AM CDT for Lake County, Porter County, Indiana. It was in force for 69 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 19, 2009, 2:51 AM CDT (07:51 UTC)
Expired: Jun 19, 2009, 4:00 AM CDT
In force: 69 min
Issued by: NWS Chicago, IL
Area: Storm-based polygon

Counties Lake County, IN, Porter County, IN

The radar

The Chicago radar (KLOT), 73 km from the middle of the area, began a volume at 07:54 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 18, 11:30 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 7.9 hours before the alert went out and 273 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: 4835 J/kg
Mixed-layer CIN: -97 J/kg
Mixed-layer LCL: 998 m above ground
0-6 km bulk shear: 51 kt
0-1 km storm-relative helicity: 376 m²/s²
0-3 km storm-relative helicity: 430 m²/s²
Significant tornado parameter: 7.1
Supercell composite: 59.8

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 19, 2:12 AM CDT, 39 minutes earlier.

Area forecast discussion, Jun 19, 2:12 AM CDT, 39 minutes before

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Hazardous weather outlook, Jun 18, 4:23 PM CDT, 10 hours 28 minutes before

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In the hours before

Local storm report, Jun 19, 2:19 AM CDT, 32 minutes before

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Local storm report, Jun 19, 2:48 AM CDT, 3 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 19, 1:13 AM CDT	Special Marine Warning	LOT		2 hr
Jun 19, 1:27 AM CDT	Severe Thunderstorm Warning	LOT	Boone, Lake, McHenry, Winnebago	63 min
Jun 19, 2:02 AM CDT	Special Marine Warning	LOT		118 min
Jun 19, 4:42 AM CDT	Special Marine Warning	LOT		77 min
Jun 19, 4:48 AM CDT	Severe Thunderstorm Warning	LOT	Cook, Lake	24 min
Jun 19, 7:49 AM CDT	Severe Thunderstorm Warning	LOT	Boone, McHenry, Winnebago	45 min
Jun 19, 8:01 AM CDT	Special Marine Warning	LOT		89 min
Jun 19, 8:31 AM CDT	Severe Thunderstorm Warning	LOT	Boone, McHenry	47 min
Jun 19, 8:55 AM CDT	Tornado Warning	LOT	Kane, McHenry	22 min
Jun 19, 9:17 AM CDT	Flash Flood Warning	LOT	Boone, DeKalb, Kane, McHenry, Ogle, Winnebago	4 hr
Jun 19, 9:31 AM CDT	Special Marine Warning	LOT		119 min
Jun 19, 9:35 AM CDT	Severe Thunderstorm Warning	LOT	Boone, Ogle, Winnebago	70 min
Jun 19, 9:46 AM CDT	Severe Thunderstorm Warning	LOT	Cook, Lake	29 min
Jun 19, 10:01 AM CDT	Severe Thunderstorm Warning	LOT	DuPage, Kane	42 min
Jun 19, 10:03 AM CDT	Flash Flood Warning	LOT	Cook, DuPage, Lake	4 hr
Jun 19, 10:04 AM CDT	River Flood Warning	LOT	Lake	9 days
Jun 19, 10:10 AM CDT	River Flood Advisory	LOT	Cook	2 hr
Jun 19, 10:12 AM CDT	Severe Thunderstorm Warning	LOT	DeKalb, Lee, Ogle	63 min
Jun 19, 10:28 AM CDT	Severe Thunderstorm Warning	LOT	Cook, DuPage	47 min
Jun 19, 10:57 AM CDT	Special Marine Warning	LOT		115 min
Jun 19, 11:07 AM CDT	Severe Thunderstorm Warning	LOT	Cook, Kane, Lake, McHenry	53 min
Jun 19, 11:23 AM CDT	Severe Thunderstorm Warning	LOT	Cook, DeKalb, DuPage, Kane	67 min
Jun 19, 11:29 AM CDT	Special Marine Warning	LOT		80 min
Jun 19, 12:25 PM CDT	Severe Thunderstorm Warning	LOT	Cook, DuPage	50 min
Jun 19, 12:27 PM CDT	River Flood Warning	LOT	Cook	8 days
Jun 19, 1:08 PM CDT	Flash Flood Watch	LOT	Boone, DeKalb, DuPage, Ford, Grundy, Iroquois and 10 more	8 hr
Jun 19, 2:13 PM CDT	River Flood Warning	LOT	Cook	53 hr
Jun 19, 2:41 PM CDT	Special Marine Warning	LOT		53 min
Jun 19, 4:35 PM CDT	River Flood Advisory	LOT	Boone	4 days
Jun 19, 5:36 PM CDT	Flash Flood Warning	LOT	Boone, DeKalb, Lee, Ogle, Winnebago	6 hr
Jun 19, 5:46 PM CDT	Tornado Warning	LOT	Boone	29 min
Jun 19, 5:49 PM CDT	Severe Thunderstorm Warning	LOT	DeKalb, Ford, Grundy, Kane, Kendall, LaSalle and 2 more	41 min
Jun 19, 6:00 PM CDT	Flash Flood Warning	LOT	Cook, DuPage, Kane, Lake, McHenry	6 hr
Jun 19, 6:00 PM CDT	Severe Thunderstorm Warning	LOT	Ford, Iroquois, Livingston	32 min
Jun 19, 6:03 PM CDT	Special Marine Warning	LOT		87 min
Jun 19, 6:05 PM CDT	Severe Thunderstorm Warning	LOT	Lake	55 min
Jun 19, 6:12 PM CDT	Severe Thunderstorm Warning	LOT	Boone, DeKalb, Lee, Ogle, Winnebago	63 min
Jun 19, 6:16 PM CDT	Tornado Warning	LOT	Ford, Iroquois	35 min
Jun 19, 6:23 PM CDT	Special Marine Warning	LOT		112 min
Jun 19, 6:23 PM CDT	Severe Thunderstorm Warning	LOT	Cook, DeKalb, DuPage, Ford, Grundy, Iroquois and 7 more	52 min
Jun 19, 6:28 PM CDT	Severe Thunderstorm Warning	LOT	Boone, Lake, McHenry	29 min
Jun 19, 6:38 PM CDT	Severe Thunderstorm Warning	LOT	DeKalb, Grundy, Kendall, LaSalle, Lee, Livingston	67 min
Jun 19, 6:56 PM CDT	Severe Thunderstorm Warning	LOT	Cook, DuPage, Iroquois, Kankakee, Will	94 min
Jun 19, 6:56 PM CDT	Severe Thunderstorm Warning	LOT	Boone, Cook, DeKalb, DuPage, Kane, Lake and 1 more	43 min
Jun 19, 3:08 PM CDT	Severe Thunderstorm Warning	LOT	Benton	12 min

Nearby

Severe Thunderstorm Warnings in Indiana, 2009 Every severe thunderstorm warning in 2009

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.