Weather alerts in Porter County, Indiana, 2015

173 weather alerts in 2015, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Porter County and its neighbors

Each county as a circle sized by its count in 2015. Tap one for its archive.

Alerts: 173
Warnings: 42
Watches: 21
Advisories: 57
Busiest month: June49 alerts
Busiest day: June 8, 20159 alerts

Over time

By month

Warning verification

How often warnings here had a storm report inside them, and how much warning the reports had.

1 of 1 tornado warnings covering Porter County in 2015 had a tornado report inside them.

Porter County, 2015

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	1	1	0%	0
Severe thunderstorm warnings	11	5	55%	5	100%	18 min
Flash flood warnings	6	1	83%	2	0%

Each office's whole area, 2015

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Chicago, IL: tornado warnings	36	22	39%	69	83%	15 min
NWS Chicago, IL: severe thunderstorm warnings	147	73	50%	252	71%	20 min
NWS Chicago, IL: flash flood warnings	46	20	57%	44	84%	87 min

An office's figures cover every county it serves, including across state lines.

Verified by the Iowa Environmental Mesonet's Cow, which matches each storm-based warning with the local storm reports inside its polygon while it was in force, within 15 km of its edge: a tornado warning counts as verified on a tornado report, a severe thunderstorm warning on hail of 1 inch or more, a gust of 58 mph or more, or wind damage, a flash flood warning on a flash flood report. The false alarm ratio is the share of warnings with no such report; "inside a warning" is the probability of detection, the share of reports that fell inside one; lead time runs from the warning's issue to each report inside it, counting zero for a report that came first. A warning with no report is not proof nothing happened: reports come from spotters, the public and damage surveys, and are thin where few people live.

The alerts

Every alert, in the order issued. Times are local, Central Time. Each opens its own page with the text, the map, the radar and the sounding.

Issued	Product	Office	Lasted
Jan 2, 3:33 PM CST	Winter Weather Advisory	LOT	23 hr
Jan 4, 3:29 AM CST	Winter Storm Watch	LOT	23 hr
Jan 5, 2:49 AM CST	Winter Weather Advisory	LOT	25 hr
Jan 6, 3:43 AM CST	Wind Chill Warning	LOT	31 hr
Jan 7, 10:52 AM CST	Wind Chill Advisory	LOT	25 hr
Jan 8, 4:03 AM CST	Winter Weather Advisory	LOT	23 hr
Jan 9, 3:15 AM CST	Wind Chill Advisory	LOT	30 hr
Jan 30, 10:37 AM CST	Winter Storm Watch	LOT	16 hr
Jan 31, 2:46 AM CST	Winter Storm Warning	LOT	45 hr
Feb 1, 4:08 AM CST	Blizzard Warning	LOT	23 hr
Feb 1, 7:43 AM CST	Mesoscale Discussion	SPC	6 hr
Feb 4, 3:05 AM CST	Winter Weather Advisory	LOT	14 hr
Feb 11, 2:43 PM CST	Winter Weather Advisory	LOT	20 hr
Feb 12, 10:36 AM CST	Winter Storm Warning	LOT	9 hr
Feb 13, 3:54 AM CST	Winter Storm Watch	LOT	11 hr
Feb 13, 3:13 PM CST	Winter Storm Warning	LOT	42 hr
Feb 18, 3:50 AM CST	Wind Chill Advisory	LOT	32 hr
Feb 19, 2:58 PM CST	Wind Chill Advisory	LOT	15 hr
Feb 22, 3:44 AM CST	Wind Chill Advisory	LOT	29 hr
Feb 26, 10:07 AM CST	Lake Effect Snow Warning	LOT	12 hr
Mar 2, 11:44 AM CST	Winter Weather Advisory	LOT	24 hr
Mar 10, 1:05 AM CDT	Dense Fog Advisory	LOT	12 hr
Mar 10, 7:05 PM CDT	Dense Fog Advisory	LOT	14 hr
Mar 13, 11:01 PM CDT	Dense Fog Advisory	LOT	7 hr
Mar 16, 8:32 PM CDT	Wind Advisory	LOT	12 hr
Mar 16, 8:40 PM CDT	Lakeshore Flood Advisory	LOT	16 hr
Mar 22, 3:19 PM CDT	Winter Weather Advisory	LOT	21 hr
Mar 23, 4:58 AM CDT	Mesoscale Discussion	SPC	5 hr
Apr 4, 4:34 PM CDT	Fire Weather Watch	LOT	12 hr
Apr 9, 12:12 AM CDT	Special Weather Statement	LOT	33 min
Apr 9, 1:48 PM CDT	Tornado Watch	SPC	9 hr
Apr 9, 8:55 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Apr 9, 10:27 PM CDT	Wind Advisory	LOT	6 hr
Apr 10, 2:17 PM CDT	Wind Advisory	LOT	5 hr
Apr 15, 10:47 AM CDT	Red Flag Warning	LOT	8 hr
Apr 21, 3:16 AM CDT	Wind Advisory	LOT	16 hr
Apr 22, 3:25 PM CDT	Freeze Warning	LOT	17 hr
Apr 23, 4:22 PM CDT	Frost Advisory	LOT	16 hr
May 8, 12:59 PM CDT	Mesoscale Discussion	SPC	3 hr
May 8, 2:54 PM CDT	Special Weather Statement	LOT	51 min
May 10, 6:48 PM CDT	Dense Fog Advisory	LOT	13 hr
May 26, 12:24 PM CDT	Mesoscale Discussion	SPC	2 hr
May 27, 11:09 AM CDT	Mesoscale Discussion	SPC	96 min
May 29, 2:56 PM CDT	Lakeshore Flood Advisory	LOT	37 hr
May 30, 4:15 AM CDT	Beach Hazards Statement	LOT	59 hr
May 31, 12:14 AM CDT	Areal Flood Advisory	LOT	9 hr
May 31, 9:58 AM CDT	River Flood Advisory	LOT	6 days
Jun 7, 2:36 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Jun 7, 3:50 PM CDT	Mesoscale Discussion	SPC	55 min
Jun 7, 4:13 PM CDT	Severe Thunderstorm Warning	LOT	62 min
Jun 7, 4:35 PM CDT	Tornado Warning	LOT	23 min
Jun 7, 5:18 PM CDT	Flash Flood Warning	LOT	5 hr
Jun 7, 5:34 PM CDT	Mesoscale Discussion	SPC	86 min
Jun 7, 10:14 PM CDT	Flash Flood Warning	LOT	5 hr
Jun 7, 11:10 PM CDT	Areal Flood Advisory	LOT	11 hr
Jun 8, 9:01 AM CDT	River Flood Warning	LOT	3 days
Jun 8, 3:32 PM CDT	Mesoscale Discussion	SPC	88 min
Jun 8, 3:56 PM CDT	Severe Thunderstorm Warning	LOT	49 min
Jun 8, 4:55 PM CDT	Areal Flood Advisory	LOT	4 hr
Jun 8, 4:55 PM CDT	Severe Thunderstorm Warning	LOT	56 min
Jun 8, 5:17 PM CDT	Flash Flood Warning	LOT	6 hr
Jun 8, 6:02 PM CDT	Severe Thunderstorm Warning	LOT	43 min
Jun 9, 4:12 AM CDT	River Flood Advisory	LOT	5 days
Jun 10, 6:41 AM CDT	Special Weather Statement	LOT	49 min
Jun 10, 6:48 AM CDT	Severe Thunderstorm Warning	LOT	42 min
Jun 10, 7:07 AM CDT	Special Weather Statement	LOT	23 min
Jun 10, 3:51 PM CDT	Mesoscale Discussion	SPC	114 min
Jun 10, 6:48 PM CDT	Special Weather Statement	LOT	42 min
Jun 10, 7:53 PM CDT	Severe Thunderstorm Warning	LOT	67 min
Jun 11, 2:06 PM CDT	Flash Flood Watch	LOT	20 hr
Jun 11, 3:52 PM CDT	Mesoscale Discussion	SPC	113 min
Jun 13, 2:42 PM CDT	Mesoscale Discussion	SPC	2 hr
Jun 15, 4:10 AM CDT	Flash Flood Watch	LOT	24 hr
Jun 15, 11:42 AM CDT	Areal Flood Advisory	LOT	2 hr
Jun 15, 9:30 PM CDT	River Flood Warning	LOT	10 days
Jun 15, 9:30 PM CDT	River Flood Warning	LOT	10 days
Jun 17, 5:51 AM CDT	Areal Flood Advisory	LOT	3 hr
Jun 17, 9:24 AM CDT	Areal Flood Advisory	LOT	3 hr
Jun 18, 3:30 PM CDT	Flash Flood Warning	LOT	6 hr
Jun 20, 9:50 PM CDT	Special Weather Statement	LOT	40 min
Jun 20, 10:59 PM CDT	Flash Flood Warning	LOT	6 hr
Jun 22, 9:14 AM CDT	Mesoscale Discussion	SPC	61 min
Jun 22, 9:39 AM CDT	Severe Thunderstorm Watch	SPC	3 hr
Jun 22, 11:00 AM CDT	Mesoscale Discussion	SPC	2 hr
Jun 22, 7:31 PM CDT	Mesoscale Discussion	SPC	59 min
Jun 22, 8:17 PM CDT	Tornado Watch	SPC	6 hr
Jun 22, 10:00 PM CDT	Mesoscale Discussion	SPC	60 min
Jun 22, 10:39 PM CDT	Flash Flood Warning	LOT	8 hr
Jun 23, 3:08 PM CDT	Flash Flood Watch	LOT	44 hr
Jun 26, 1:17 PM CDT	Areal Flood Advisory	LOT	6 hr
Jun 26, 2:08 PM CDT	Areal Flood Warning	LOT	21 hr
Jun 27, 3:28 AM CDT	Beach Hazards Statement	LOT	20 hr
Jun 27, 8:59 AM CDT	River Flood Watch	LOT	6 days
Jun 27, 8:59 AM CDT	River Flood Watch	LOT	5 days
Jun 28, 9:04 AM CDT	River Flood Advisory	LOT	5 days
Jun 29, 10:11 AM CDT	River Flood Advisory	LOT	3 days
Jul 1, 11:42 AM CDT	Beach Hazards Statement	LOT	8 hr
Jul 2, 3:20 AM CDT	Beach Hazards Statement	LOT	25 hr
Jul 6, 4:34 PM CDT	Beach Hazards Statement	LOT	35 hr
Jul 8, 4:03 AM CDT	Beach Hazards Statement	LOT	3 hr
Jul 9, 12:32 AM CDT	Areal Flood Warning	LOT	6 hr
Jul 9, 6:04 AM CDT	Beach Hazards Statement	LOT	7 hr
Jul 9, 6:29 AM CDT	Areal Flood Warning	LOT	3 hr
Jul 9, 9:33 AM CDT	River Flood Warning	LOT	9 days
Jul 9, 9:33 AM CDT	River Flood Warning	LOT	9 days
Jul 12, 2:19 PM CDT	Flash Flood Watch	LOT	33 hr
Jul 13, 3:49 AM CDT	Mesoscale Discussion	SPC	116 min
Jul 13, 4:14 AM CDT	Severe Thunderstorm Watch	SPC	6 hr
Jul 13, 7:19 AM CDT	Special Weather Statement	LOT	41 min
Jul 13, 7:19 AM CDT	Mesoscale Discussion	SPC	86 min
Jul 13, 7:55 AM CDT	Areal Flood Advisory	LOT	6 hr
Jul 13, 4:01 PM CDT	Tornado Watch	SPC	7 hr
Jul 13, 6:59 PM CDT	Mesoscale Discussion	SPC	91 min
Jul 13, 8:42 PM CDT	Special Weather Statement	LOT	48 min
Jul 13, 9:34 PM CDT	Severe Thunderstorm Warning	LOT	30 min
Jul 13, 10:22 PM CDT	Mesoscale Discussion	SPC	53 min
Jul 14, 5:05 AM CDT	Beach Hazards Statement	LOT	38 hr
Jul 16, 4:55 PM CDT	Severe Thunderstorm Watch	SPC	7 hr
Jul 16, 7:58 PM CDT	Mesoscale Discussion	SPC	92 min
Jul 17, 10:45 AM CDT	Heat Advisory	LOT	33 hr
Jul 17, 5:54 PM CDT	Mesoscale Discussion	SPC	3 hr
Jul 17, 8:52 PM CDT	Areal Flood Advisory	LOT	4 hr
Jul 17, 10:44 PM CDT	Areal Flood Advisory	LOT	3 hr
Jul 18, 1:31 PM CDT	Tornado Watch	SPC	5 hr
Jul 18, 1:56 PM CDT	Flash Flood Watch	LOT	5 hr
Jul 18, 4:15 PM CDT	Special Weather Statement	LOT	15 min
Jul 18, 4:22 PM CDT	Severe Thunderstorm Warning	LOT	23 min
Jul 18, 4:47 PM CDT	Severe Thunderstorm Warning	LOT	13 min
Jul 18, 5:43 PM CDT	Mesoscale Discussion	SPC	92 min
Jul 18, 5:54 PM CDT	Areal Flood Advisory	LOT	3 hr
Jul 18, 9:08 PM CDT	River Flood Warning	LOT	7 days
Jul 18, 9:08 PM CDT	River Flood Warning	LOT	8 days
Aug 2, 8:30 PM CDT	Severe Thunderstorm Watch	SPC	5 hr
Aug 2, 11:14 PM CDT	Special Weather Statement	LOT	31 min
Aug 2, 11:22 PM CDT	Severe Thunderstorm Warning	LOT	53 min
Aug 3, 12:14 AM CDT	Severe Thunderstorm Warning	LOT	61 min
Aug 10, 4:21 PM CDT	Beach Hazards Statement	LOT	29 hr
Aug 15, 6:29 PM CDT	Special Weather Statement	LOT	61 min
Aug 18, 3:41 AM CDT	Areal Flood Advisory	LOT	6 hr
Aug 18, 4:03 AM CDT	Areal Flood Advisory	LOT	6 hr
Aug 18, 9:58 AM CDT	Areal Flood Advisory	LOT	4 hr
Aug 19, 4:23 PM CDT	Beach Hazards Statement	LOT	33 hr
Aug 23, 3:39 AM CDT	Beach Hazards Statement	LOT	66 hr
Aug 31, 12:50 AM CDT	Dense Fog Advisory	LOT	8 hr
Sep 5, 8:29 AM CDT	Areal Flood Advisory	LOT	3 hr
Sep 5, 8:30 AM CDT	Areal Flood Advisory	LOT	3 hr
Sep 5, 12:15 PM CDT	Areal Flood Advisory	LOT	2 hr
Sep 8, 1:29 PM CDT	Mesoscale Discussion	SPC	91 min
Sep 10, 3:32 AM CDT	Lakeshore Flood Statement	LOT	13 hr
Sep 10, 4:13 PM CDT	Beach Hazards Statement	LOT	60 hr
Sep 18, 3:16 PM CDT	Beach Hazards Statement	LOT	31 hr
Sep 19, 1:13 AM CDT	Special Weather Statement	LOT	32 min
Oct 7, 1:48 AM CDT	Dense Fog Advisory	LOT	7 hr
Oct 16, 3:13 AM CDT	Freeze Warning	LOT	30 hr
Oct 17, 2:49 PM CDT	Freeze Warning	LOT	18 hr
Oct 19, 3:23 AM CDT	Red Flag Warning	LOT	16 hr
Nov 10, 2:51 PM CST	Wind Advisory	LOT	51 hr
Nov 11, 9:47 PM CST	Mesoscale Discussion	SPC	88 min
Nov 20, 3:24 AM CST	Winter Storm Warning	LOT	41 hr
Nov 20, 3:24 AM CST	Winter Weather Advisory	LOT	41 hr
Nov 21, 8:36 AM CST	Mesoscale Discussion	SPC	5 hr
Nov 27, 3:40 AM CST	Lakeshore Flood Advisory	LOT	17 hr
Dec 4, 8:01 PM CST	Dense Fog Advisory	LOT	16 hr
Dec 6, 9:18 PM CST	Dense Fog Advisory	LOT	24 hr
Dec 23, 11:30 AM CST	Wind Advisory	LOT	16 hr
Dec 27, 2:54 PM CST	Wind Advisory	LOT	27 hr
Dec 27, 3:07 PM CST	Winter Storm Warning	LOT	33 hr
Dec 27, 3:07 PM CST	Freezing Rain Advisory	LOT	24 hr
Dec 28, 5:26 AM CST	Mesoscale Discussion	SPC	4 hr
Dec 28, 11:04 AM CST	Mesoscale Discussion	SPC	6 hr
Dec 28, 3:09 PM CST	Winter Storm Warning	LOT	3 hr
Dec 28, 5:27 PM CST	Areal Flood Advisory	LOT	12 hr
Dec 28, 8:47 PM CST	River Flood Advisory	LOT	4 days

By product

Every kind of product issued here, grouped by hazard. Each opens the same place narrowed to that product.

Product	Alerts
Severe storms
Severe Thunderstorm Warning	11
Tornado Warning	1
Severe Thunderstorm Watch	6
Tornado Watch	4
Mesoscale Discussion	27
Special Weather Statement	12
Flooding
Areal Flood Warning	3
Flash Flood Warning	6
River Flood Warning	7
Flash Flood Watch	5
River Flood Watch	2
Areal Flood Advisory	18
River Flood Advisory	5
Winter
Blizzard Warning	1
Lake Effect Snow Warning	1
Winter Storm Warning	6
Winter Storm Watch	3
Freezing Rain Advisory	1
Winter Weather Advisory	8
Heat
Heat Advisory	1
Cold
Freeze Warning	3
Wind Chill Warning	1
Frost Advisory	1
Wind Chill Advisory	5
Wind and dust
Wind Advisory	7
Fire
Red Flag Warning	2
Fire Weather Watch	1
Fog and smoke
Dense Fog Advisory	8
Coast and beach
Lakeshore Flood Advisory	3
Beach Hazards Statement	13
Lakeshore Flood Statement	1

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2014 2016

Sources

National Weather Service watches, warnings, advisories and statements from the Iowa Environmental Mesonet's VTEC archive, which reconstructs tornado, severe thunderstorm, flash flood and marine warnings back to 1986 from the NWS text archive. Storm Prediction Center watches and mesoscale discussions from SPC's archive through the Mesonet. County centers from the US Census Bureau. Warning verification from the Mesonet's Cow. Rebuilt daily.