Alert archive / Florida / Hillsborough County

Weather alerts in Hillsborough County, Florida, 2018

167 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Hillsborough County and its neighbors

Each county as a circle sized by its count in 2018. Tap one for its archive.

Alerts: 167
Warnings: 51
Watches: 14
Advisories: 35
Busiest month: December31 alerts
Busiest day: December 20, 201812 alerts

Over time

By month

Warning verification

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

2 of 7 tornado warnings covering Hillsborough County in 2018 had a tornado report inside them; 1 of 3 tornado reports fell inside a warning, on average 0 minutes after it went out.

Hillsborough County, 2018

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	7	2	71%	3	33%	0 min
Severe thunderstorm warnings	13	5	62%	2	100%	8 min
Flash flood warnings	0			0

Each office's whole area, 2018

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Tampa Bay, FL: tornado warnings	32	6	81%	17	47%	11 min
NWS Tampa Bay, FL: severe thunderstorm warnings	31	12	61%	34	47%	16 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, Eastern Time. Each opens its own page with the text, the map, the radar and the sounding.

Issued	Product	Office	Lasted
Jan 1, 2:39 PM EST	Wind Chill Advisory	TBW	18 hr
Jan 3, 3:57 AM EST	Freeze Watch	TBW	11 hr
Jan 3, 3:57 AM EST	Wind Chill Advisory	TBW	27 hr
Jan 3, 3:13 PM EST	Freeze Watch	TBW	12 hr
Jan 3, 3:13 PM EST	Freeze Warning	TBW	18 hr
Jan 4, 2:48 AM EST	Freeze Warning	TBW	30 hr
Jan 11, 5:15 AM EST	Dense Fog Advisory	TBW	6 hr
Jan 11, 5:46 PM EST	Dense Fog Advisory	TBW	16 hr
Jan 12, 4:52 AM EST	Rip Current Statement	TBW	62 hr
Jan 13, 3:49 AM EST	High Surf Advisory	TBW	15 hr
Jan 16, 3:04 PM EST	Freeze Watch	TBW	18 hr
Jan 17, 4:33 AM EST	Wind Chill Advisory	TBW	29 hr
Jan 17, 5:01 AM EST	Rip Current Statement	TBW	26 hr
Jan 17, 9:31 AM EST	Freeze Warning	TBW	23 hr
Jan 18, 2:57 AM EST	Freeze Watch	TBW	12 hr
Jan 18, 2:33 PM EST	Freeze Warning	TBW	18 hr
Jan 22, 4:05 AM EST	Dense Fog Advisory	TBW	5 hr
Jan 26, 3:59 AM EST	Lake Wind Advisory	TBW	14 hr
Jan 29, 3:15 AM EST	Rip Current Statement	TBW	40 hr
Feb 5, 2:56 AM EST	Dense Fog Advisory	TBW	7 hr
Feb 15, 9:14 AM EST	Dense Fog Advisory	TBW	106 min
Feb 17, 3:06 AM EST	Dense Fog Advisory	TBW	7 hr
Mar 3, 5:15 PM EST	Red Flag Warning	TBW	26 hr
Mar 7, 3:22 AM EST	Rip Current Statement	TBW	47 hr
Mar 8, 3:14 AM EST	Red Flag Warning	TBW	16 hr
Mar 12, 3:51 AM EDT	Rip Current Statement	TBW	36 hr
Mar 12, 3:51 AM EDT	High Surf Advisory	TBW	30 hr
Mar 12, 4:08 AM EDT	Lake Wind Advisory	TBW	16 hr
Mar 20, 3:23 AM EDT	Lake Wind Advisory	TBW	17 hr
Mar 20, 3:28 AM EDT	Rip Current Statement	TBW	44 hr
Mar 20, 10:24 AM EDT	Tornado Watch	SPC	9 hr
Mar 20, 1:00 PM EDT	Mesoscale Discussion	SPC	60 min
Mar 20, 3:09 PM EDT	Severe Thunderstorm Warning	TBW	51 min
Mar 20, 3:14 PM EDT	Severe Thunderstorm Warning	TBW	46 min
Mar 20, 4:16 PM EDT	Mesoscale Discussion	SPC	89 min
Mar 22, 3:18 AM EDT	Rip Current Statement	TBW	20 hr
Apr 7, 5:50 PM EDT	Special Weather Statement	TBW	55 min
Apr 10, 10:13 AM EDT	Mesoscale Discussion	SPC	2 hr
Apr 10, 10:51 AM EDT	Special Weather Statement	TBW	24 min
Apr 10, 12:10 PM EDT	Areal Flood Advisory	TBW	80 min
Apr 15, 4:41 AM EDT	Rip Current Statement	TBW	60 hr
Apr 15, 8:02 AM EDT	Lake Wind Advisory	TBW	12 hr
Apr 15, 10:12 AM EDT	Tornado Watch	SPC	8 hr
Apr 15, 12:18 PM EDT	Mesoscale Discussion	SPC	57 min
Apr 15, 2:51 PM EDT	Tornado Warning	TBW	27 min
Apr 15, 3:09 PM EDT	High Surf Advisory	TBW	29 hr
Apr 15, 3:14 PM EDT	Special Weather Statement	TBW	46 min
Apr 15, 3:27 PM EDT	Tornado Warning	TBW	6 min
Apr 15, 3:46 PM EDT	Severe Thunderstorm Warning	TBW	29 min
Apr 15, 3:58 PM EDT	Special Weather Statement	TBW	47 min
May 14, 3:39 PM EDT	Special Weather Statement	TBW	51 min
May 14, 3:49 PM EDT	Areal Flood Advisory	TBW	86 min
May 15, 6:47 PM EDT	Special Weather Statement	TBW	43 min
May 17, 3:08 PM EDT	Areal Flood Advisory	TBW	82 min
May 17, 4:26 PM EDT	Areal Flood Warning	TBW	2 hr
May 19, 9:24 PM EDT	River Flood Warning	TBW	3 days
May 21, 7:46 AM EDT	River Flood Warning	TBW	30 hr
May 24, 7:11 PM EDT	Special Weather Statement	TBW	34 min
May 24, 7:42 PM EDT	Areal Flood Advisory	TBW	93 min
May 25, 3:04 PM EDT	Flood Watch	TBW	46 hr
May 26, 4:28 AM EDT	Rip Current Statement	TBW	4 days
May 26, 11:48 AM EDT	Tropical Storm Watch	TBW	6 hr
May 26, 5:15 PM EDT	Tropical Storm Warning	TBW	30 hr
May 26, 9:00 PM EDT	River Flood Warning	TBW	22 hr
May 27, 3:11 AM EDT	High Surf Advisory	TBW	21 hr
May 27, 3:32 AM EDT	Coastal Flood Statement	TBW	24 hr
May 27, 12:56 PM EDT	Mesoscale Discussion	SPC	3 hr
May 30, 11:16 AM EDT	River Flood Warning	TBW	4 days
May 31, 4:20 PM EDT	Special Weather Statement	TBW	40 min
Jun 6, 11:16 AM EDT	Special Weather Statement	TBW	44 min
Jun 8, 2:30 PM EDT	Special Weather Statement	TBW	30 min
Jun 8, 3:26 PM EDT	Severe Thunderstorm Warning	TBW	49 min
Jun 13, 8:59 PM EDT	Areal Flood Advisory	TBW	91 min
Jun 25, 6:50 PM EDT	Special Weather Statement	TBW	40 min
Jun 28, 1:44 PM EDT	Special Weather Statement	TBW	31 min
Jul 2, 8:45 PM EDT	Special Weather Statement	TBW	45 min
Jul 3, 9:28 PM EDT	River Flood Warning	TBW	4 days
Jul 5, 6:46 PM EDT	Areal Flood Advisory	TBW	119 min
Jul 5, 8:45 PM EDT	Areal Flood Advisory	TBW	90 min
Jul 5, 9:58 PM EDT	River Flood Warning	TBW	4 days
Jul 6, 7:19 PM EDT	Special Weather Statement	TBW	41 min
Jul 11, 3:17 PM EDT	Special Weather Statement	TBW	28 min
Jul 14, 5:36 PM EDT	Special Weather Statement	TBW	24 min
Jul 14, 9:33 PM EDT	River Flood Warning	TBW	60 hr
Jul 21, 5:12 AM EDT	Rip Current Statement	TBW	5 days
Jul 22, 7:39 PM EDT	Mesoscale Discussion	SPC	66 min
Jul 23, 3:31 AM EDT	Mesoscale Discussion	SPC	2 hr
Jul 23, 4:05 AM EDT	Severe Thunderstorm Warning	TBW	25 min
Jul 23, 4:24 AM EDT	Severe Thunderstorm Warning	TBW	21 min
Jul 23, 4:49 AM EDT	Special Weather Statement	TBW	41 min
Jul 23, 11:45 AM EDT	River Flood Warning	TBW	9 days
Jul 23, 11:45 AM EDT	River Flood Warning	TBW	3 days
Jul 26, 4:09 PM EDT	Special Weather Statement	TBW	36 min
Jul 29, 2:58 PM EDT	Special Weather Statement	TBW	47 min
Jul 30, 9:32 AM EDT	River Flood Warning	TBW	70 hr
Aug 2, 10:00 AM EDT	River Flood Warning	TBW	4 days
Aug 2, 10:26 PM EDT	Special Weather Statement	TBW	34 min
Aug 2, 10:28 PM EDT	Severe Thunderstorm Warning	TBW	18 min
Aug 3, 9:12 AM EDT	River Flood Warning	TBW	60 hr
Aug 5, 6:12 PM EDT	Special Weather Statement	TBW	33 min
Aug 19, 3:52 PM EDT	Special Weather Statement	TBW	38 min
Aug 19, 5:10 PM EDT	Special Weather Statement	TBW	35 min
Aug 20, 7:54 PM EDT	Areal Flood Advisory	TBW	96 min
Aug 20, 8:11 PM EDT	Special Weather Statement	TBW	34 min
Aug 24, 11:26 AM EDT	River Flood Warning	TBW	46 hr
Aug 25, 4:26 PM EDT	Special Weather Statement	TBW	64 min
Aug 28, 4:42 PM EDT	Special Weather Statement	TBW	63 min
Aug 30, 1:33 PM EDT	Special Weather Statement	TBW	27 min
Aug 30, 9:08 PM EDT	River Flood Warning	TBW	61 hr
Aug 31, 4:16 PM EDT	Special Weather Statement	TBW	44 min
Aug 31, 9:19 PM EDT	River Flood Warning	TBW	4 days
Sep 11, 6:58 AM EDT	River Flood Warning	TBW	35 hr
Sep 13, 5:18 PM EDT	Severe Thunderstorm Warning	TBW	14 min
Sep 13, 5:55 PM EDT	Special Weather Statement	TBW	35 min
Sep 14, 11:05 AM EDT	River Flood Warning	TBW	9 hr
Sep 24, 4:44 PM EDT	Special Weather Statement	TBW	46 min
Sep 24, 5:33 PM EDT	Special Weather Statement	TBW	57 min
Sep 27, 12:17 AM EDT	Areal Flood Advisory	TBW	88 min
Oct 8, 5:33 AM EDT	Tropical Storm Watch	TBW	58 hr
Oct 8, 5:35 AM EDT	Rip Current Statement	TBW	3 days
Oct 8, 5:35 AM EDT	High Surf Advisory	TBW	3 days
Oct 8, 5:38 AM EDT	Storm Surge Watch	TBW	60 hr
Oct 26, 3:31 AM EDT	Rip Current Statement	TBW	18 hr
Oct 27, 4:14 AM EDT	Rip Current Statement	TBW	40 hr
Nov 2, 2:31 PM EDT	Special Weather Statement	TBW	44 min
Nov 2, 2:42 PM EDT	Severe Thunderstorm Warning	TBW	33 min
Nov 2, 3:08 PM EDT	Tornado Warning	TBW	37 min
Nov 2, 3:15 PM EDT	Severe Thunderstorm Warning	TBW	45 min
Nov 2, 3:21 PM EDT	Tornado Warning	TBW	24 min
Nov 2, 3:23 PM EDT	Tornado Warning	TBW	14 min
Nov 2, 3:47 PM EDT	Severe Thunderstorm Warning	TBW	28 min
Nov 2, 3:55 PM EDT	Severe Thunderstorm Warning	TBW	35 min
Nov 14, 2:44 PM EST	Rip Current Statement	TBW	30 hr
Nov 16, 3:05 AM EST	Rip Current Statement	TBW	18 hr
Nov 25, 2:18 AM EST	Dense Fog Advisory	TBW	7 hr
Nov 27, 4:06 AM EST	Rip Current Statement	TBW	39 hr
Dec 1, 9:01 AM EST	Rip Current Statement	TBW	34 hr
Dec 3, 3:09 AM EST	Rip Current Statement	TBW	19 hr
Dec 4, 2:30 PM EST	Rip Current Statement	TBW	35 hr
Dec 5, 1:44 PM EST	Red Flag Warning	TBW	4 hr
Dec 9, 3:45 AM EST	Rip Current Statement	TBW	63 hr
Dec 9, 7:54 AM EST	Mesoscale Discussion	SPC	2 hr
Dec 9, 9:15 AM EST	Special Weather Statement	TBW	60 min
Dec 9, 11:21 AM EST	Tornado Warning	TBW	24 min
Dec 14, 6:40 AM EST	Rip Current Statement	TBW	68 hr
Dec 14, 2:20 PM EST	Mesoscale Discussion	SPC	2 hr
Dec 14, 4:03 PM EST	Severe Thunderstorm Watch	SPC	6 hr
Dec 14, 6:50 PM EST	Mesoscale Discussion	SPC	115 min
Dec 15, 2:14 PM EST	High Surf Advisory	TBW	23 hr
Dec 17, 4:49 AM EST	Rip Current Statement	TBW	14 hr
Dec 19, 3:53 AM EST	Flood Watch	TBW	47 hr
Dec 19, 10:52 AM EST	River Flood Warning	TBW	45 hr
Dec 19, 3:26 PM EST	Coastal Flood Watch	TBW	12 hr
Dec 20, 3:12 AM EST	Coastal Flood Warning	TBW	39 hr
Dec 20, 3:12 AM EST	Rip Current Statement	TBW	66 hr
Dec 20, 3:12 AM EST	High Surf Advisory	TBW	66 hr
Dec 20, 7:55 AM EST	Tornado Watch	SPC	7 hr
Dec 20, 8:01 AM EST	Tornado Warning	TBW	29 min
Dec 20, 8:53 AM EST	River Flood Warning	TBW	4 days
Dec 20, 9:54 AM EST	Areal Flood Advisory	TBW	111 min
Dec 20, 11:26 AM EST	River Flood Warning	TBW	5 days
Dec 20, 11:39 AM EST	Areal Flood Advisory	TBW	96 min
Dec 20, 12:01 PM EST	Severe Thunderstorm Warning	TBW	44 min
Dec 20, 1:21 PM EST	Areal Flood Advisory	TBW	84 min
Dec 20, 2:59 PM EST	Lake Wind Advisory	TBW	28 hr
Dec 21, 9:05 AM EST	River Flood Warning	TBW	10 hr
Dec 30, 1:31 AM EST	Dense Fog Advisory	TBW	7 hr

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	13
Tornado Warning	7
Severe Thunderstorm Watch	1
Tornado Watch	3
Mesoscale Discussion	10
Special Weather Statement	33
Flooding
Areal Flood Warning	1
River Flood Warning	21
Flood Watch	2
Areal Flood Advisory	12
Cold
Freeze Warning	4
Freeze Watch	4
Wind Chill Advisory	3
Wind and dust
Lake Wind Advisory	5
Fire
Red Flag Warning	3
Fog and smoke
Dense Fog Advisory	8
Tropical
Tropical Storm Warning	1
Storm Surge Watch	1
Tropical Storm Watch	2
Coast and beach
Coastal Flood Warning	1
Coastal Flood Watch	1
High Surf Advisory	7
Coastal Flood Statement	1
Rip Current Statement	23

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2017 2019

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.