Weather alerts in San Juan County, Utah, 2024

211 weather alerts in 2024, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

San Juan County and its neighbors

Each county as a circle sized by its count in 2024. Tap one for its archive.

Alerts: 211
Warnings: 93
Watches: 37
Advisories: 44
Busiest month: June66 alerts
Busiest day: June 21, 202418 alerts

Over time

By month

Warning verification

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

0 of 2 tornado reports fell inside a warning.

San Juan County, 2024

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
Tornado warnings	0			2	0%
Severe thunderstorm warnings	33	6	82%	4	75%	9 min
Flash flood warnings	25	3	88%	6	0%

Each office's whole area, 2024

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Salt Lake City, UT: severe thunderstorm warnings	100	37	63%	272	25%	16 min
NWS Salt Lake City, UT: flash flood warnings	68	34	50%	58	69%	97 min
NWS Grand Junction, CO: tornado warnings	0			2	0%
NWS Grand Junction, CO: severe thunderstorm warnings	90	9	90%	42	26%	12 min
NWS Grand Junction, CO: flash flood warnings	57	8	86%	42	26%	43 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, Mountain Time. Each opens its own page with the text, the map, the radar and the sounding.

Issued	Product	Office	Lasted
Jan 5, 1:58 PM MST	Winter Storm Watch	GJT	13 hr
Jan 6, 3:21 AM MST	Winter Storm Warning	GJT	53 hr
Jan 6, 3:21 AM MST	Winter Weather Advisory	GJT	56 hr
Jan 10, 1:12 PM MST	Winter Weather Advisory	GJT	28 hr
Jan 12, 2:47 PM MST	Winter Storm Watch	GJT	24 hr
Jan 13, 2:22 PM MST	Winter Weather Advisory	GJT	40 hr
Jan 24, 1:10 PM MST	Winter Weather Advisory	GJT	40 hr
Jan 30, 1:20 PM MST	Winter Storm Watch	GJT	49 hr
Feb 1, 2:07 AM MST	Winter Storm Warning	GJT	3 days
Feb 5, 1:56 AM MST	Winter Storm Watch	GJT	13 hr
Feb 5, 3:19 PM MST	Winter Storm Warning	GJT	71 hr
Feb 6, 3:04 PM MST	Winter Weather Advisory	GJT	3 days
Feb 25, 2:33 PM MST	Wind Advisory	SLC	38 hr
Feb 26, 2:18 AM MST	Winter Weather Advisory	GJT	37 hr
Feb 27, 8:54 AM MST	Snow Squall Warning	GJT	36 min
Feb 27, 9:27 AM MST	Snow Squall Warning	GJT	33 min
Feb 27, 9:59 AM MST	Snow Squall Warning	GJT	31 min
Feb 29, 1:37 PM MST	Wind Advisory	GJT	63 hr
Feb 29, 2:08 PM MST	High Wind Watch	SLC	13 hr
Feb 29, 2:08 PM MST	High Wind Warning	SLC	69 hr
Mar 1, 2:31 PM MST	High Wind Warning	GJT	36 hr
Mar 1, 2:39 PM MST	Winter Weather Advisory	GJT	56 hr
Mar 11, 1:42 PM MDT	Winter Weather Advisory	GJT	64 hr
Mar 12, 2:37 PM MDT	Winter Storm Watch	GJT	13 hr
Mar 13, 3:22 AM MDT	Winter Storm Warning	GJT	3 days
Mar 14, 1:45 PM MDT	Wind Advisory	GJT	24 hr
Mar 15, 2:23 PM MDT	Winter Weather Advisory	GJT	43 hr
Mar 23, 3:07 AM MDT	Winter Weather Advisory	GJT	51 hr
Mar 29, 2:44 PM MDT	Wind Advisory	GJT	29 hr
Apr 3, 1:29 PM MDT	High Wind Watch	GJT	25 hr
Apr 3, 2:07 PM MDT	High Wind Watch	SLC	24 hr
Apr 4, 2:08 PM MDT	Wind Advisory	SLC	31 hr
Apr 4, 2:24 PM MDT	High Wind Warning	GJT	30 hr
Apr 5, 11:22 AM MDT	Blowing Dust Warning	GJT	9 hr
Apr 5, 2:24 PM MDT	Freeze Watch	GJT	24 hr
Apr 6, 2:28 AM MDT	Wind Advisory	GJT	19 hr
Apr 6, 2:15 PM MDT	Freeze Warning	GJT	20 hr
May 3, 2:16 PM MDT	Wind Advisory	SLC	56 hr
May 3, 2:35 PM MDT	High Wind Watch	SLC	24 hr
May 3, 2:42 PM MDT	High Wind Watch	GJT	25 hr
May 4, 3:23 PM MDT	High Wind Warning	GJT	33 hr
May 6, 2:44 PM MDT	Freeze Watch	GJT	24 hr
May 6, 2:44 PM MDT	Wind Advisory	GJT	30 hr
May 7, 2:15 PM MDT	Freeze Warning	GJT	18 hr
Jun 2, 12:45 PM MDT	Excessive Heat Watch	SLC	25 hr
Jun 3, 1:54 PM MDT	Excessive Heat Warning	SLC	5 days
Jun 10, 2:41 AM MDT	Excessive Heat Watch	SLC	24 hr
Jun 11, 2:35 AM MDT	Excessive Heat Warning	SLC	67 hr
Jun 12, 2:23 PM MDT	Red Flag Warning	SLC	31 hr
Jun 13, 2:48 PM MDT	Fire Weather Watch	SLC	21 hr
Jun 14, 10:24 AM MDT	Special Weather Statement	GJT	36 min
Jun 14, 11:04 AM MDT	Special Weather Statement	GJT	26 min
Jun 14, 11:24 AM MDT	Red Flag Warning	SLC	4 days
Jun 14, 2:25 PM MDT	Fire Weather Watch	GJT	12 hr
Jun 15, 2:33 AM MDT	Red Flag Warning	GJT	43 hr
Jun 15, 2:33 AM MDT	Red Flag Warning	GJT	67 hr
Jun 20, 2:11 AM MDT	Flood Watch	SLC	42 hr
Jun 20, 2:13 AM MDT	Flood Watch	GJT	44 hr
Jun 20, 12:09 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 20, 1:35 PM MDT	Severe Thunderstorm Warning	GJT	25 min
Jun 20, 1:37 PM MDT	Severe Thunderstorm Warning	GJT	23 min
Jun 20, 1:58 PM MDT	Severe Thunderstorm Warning	GJT	32 min
Jun 20, 1:59 PM MDT	Severe Thunderstorm Warning	GJT	31 min
Jun 20, 2:28 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GJT	32 min
Jun 20, 2:30 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GJT	30 min
Jun 20, 2:57 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GJT	33 min
Jun 21, 8:09 AM MDT	Severe Thunderstorm Warning	GJT	36 min
Jun 21, 8:51 AM MDT	Special Weather Statement	GJT	24 min
Jun 21, 9:43 AM MDT	Severe Thunderstorm Warning	GJT	32 min
Jun 21, 11:10 AM MDT	Mesoscale Discussion	SPC	2 hr
Jun 21, 12:02 PM MDT	Severe Thunderstorm Watch	SPC	8 hr
Jun 21, 2:09 PM MDT	Severe Thunderstorm Warning Considerable damage threat	SLC	38 min
Jun 21, 2:11 PM MDT	Mesoscale Discussion	SPC	94 min
Jun 21, 2:42 PM MDT	Severe Thunderstorm Warning	SLC	48 min
Jun 21, 3:03 PM MDT	Severe Thunderstorm Warning	SLC	42 min
Jun 21, 3:12 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GJT	33 min
Jun 21, 3:45 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GJT	30 min
Jun 21, 3:49 PM MDT	Severe Thunderstorm Warning	SLC	28 min
Jun 21, 4:08 PM MDT	Special Weather Statement	GJT	37 min
Jun 21, 4:16 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GJT	29 min
Jun 21, 4:31 PM MDT	Mesoscale Discussion	SPC	89 min
Jun 21, 4:50 PM MDT	Severe Thunderstorm Warning	GJT	25 min
Jun 21, 5:15 PM MDT	Special Weather Statement	GJT	30 min
Jun 21, 5:48 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GJT	27 min
Jun 21, 6:14 PM MDT	Severe Thunderstorm Warning	GJT	16 min
Jun 21, 6:27 PM MDT	Severe Thunderstorm Warning	GJT	33 min
Jun 22, 2:32 PM MDT	Mesoscale Discussion	SPC	2 hr
Jun 23, 2:02 PM MDT	Areal Flood Advisory	GJT	118 min
Jun 25, 1:45 PM MDT	Special Weather Statement	GJT	30 min
Jun 25, 1:53 PM MDT	Flash Flood Warning	GJT	3 hr
Jun 25, 4:00 PM MDT	Flash Flood Warning	GJT	3 hr
Jun 26, 1:31 PM MDT	Flood Watch	GJT	30 hr
Jun 26, 4:27 PM MDT	Flash Flood Warning Considerable damage threat	SLC	3 hr
Jun 27, 12:43 PM MDT	Mesoscale Discussion	SPC	3 hr
Jun 27, 1:17 PM MDT	Severe Thunderstorm Watch	SPC	6 hr
Jun 27, 2:21 PM MDT	Severe Thunderstorm Warning	GJT	39 min
Jun 27, 2:42 PM MDT	Severe Thunderstorm Warning	SLC	48 min
Jun 27, 2:46 PM MDT	Severe Thunderstorm Warning	GJT	29 min
Jun 27, 2:48 PM MDT	Flash Flood Warning Considerable damage threat	GJT	118 min
Jun 27, 2:59 PM MDT	Flash Flood Warning Considerable damage threat	GJT	3 hr
Jun 27, 3:11 PM MDT	Severe Thunderstorm Warning	GJT	34 min
Jun 27, 3:32 PM MDT	Areal Flood Advisory	GJT	2 hr
Jun 27, 3:54 PM MDT	Flash Flood Warning Considerable damage threat	SLC	6 hr
Jun 27, 4:12 PM MDT	Mesoscale Discussion	SPC	93 min
Jun 27, 4:42 PM MDT	Severe Thunderstorm Warning Considerable damage threat	GJT	33 min
Jun 27, 5:13 PM MDT	Special Weather Statement	GJT	32 min
Jun 27, 5:53 PM MDT	Flash Flood Warning	GJT	70 min
Jun 28, 1:21 PM MDT	Fire Weather Watch	SLC	49 hr
Jun 29, 2:02 PM MDT	Flood Watch	GJT	52 hr
Jun 29, 2:44 PM MDT	Red Flag Warning	SLC	54 hr
Jul 1, 2:28 PM MDT	Fire Weather Watch	SLC	24 hr
Jul 2, 2:35 PM MDT	Red Flag Warning	SLC	54 hr
Jul 3, 12:48 PM MDT	Excessive Heat Warning	SLC	10 days
Jul 5, 2:20 PM MDT	Red Flag Warning	SLC	55 hr
Jul 6, 3:12 PM MDT	Fire Weather Watch	GJT	11 hr
Jul 7, 2:30 AM MDT	Red Flag Warning	GJT	19 hr
Jul 10, 2:47 AM MDT	Heat Advisory	GJT	5 days
Jul 12, 2:34 PM MDT	Red Flag Warning	SLC	54 hr
Jul 14, 4:30 AM MDT	Red Flag Warning	GJT	17 hr
Jul 14, 2:11 PM MDT	Areal Flood Advisory	GJT	3 hr
Jul 18, 12:45 PM MDT	Special Weather Statement	GJT	30 min
Jul 19, 1:20 PM MDT	Special Weather Statement	GJT	40 min
Jul 21, 1:29 PM MDT	Special Weather Statement	GJT	31 min
Jul 21, 2:05 PM MDT	Special Weather Statement	GJT	25 min
Jul 25, 2:32 AM MDT	Fire Weather Watch	SLC	35 hr
Jul 25, 4:07 PM MDT	Areal Flood Advisory	GJT	8 hr
Jul 25, 4:20 PM MDT	Areal Flood Advisory	GJT	71 min
Jul 25, 4:25 PM MDT	Areal Flood Advisory	GJT	3 hr
Jul 25, 5:31 PM MDT	Flash Flood Warning	GJT	74 min
Jul 25, 5:46 PM MDT	Areal Flood Advisory	GJT	59 min
Jul 25, 6:42 PM MDT	Flash Flood Warning	GJT	63 min
Jul 26, 1:39 PM MDT	Red Flag Warning	SLC	4 days
Jul 26, 2:58 PM MDT	Special Weather Statement	GJT	32 min
Jul 26, 3:27 PM MDT	Areal Flood Advisory	GJT	3 hr
Aug 1, 1:56 PM MDT	Red Flag Warning	SLC	32 hr
Aug 2, 4:04 PM MDT	Areal Flood Advisory	GJT	116 min
Aug 3, 1:00 PM MDT	Excessive Heat Warning	SLC	3 days
Aug 5, 4:57 PM MDT	Areal Flood Advisory	GJT	3 hr
Aug 6, 3:02 PM MDT	Areal Flood Advisory	GJT	3 hr
Aug 7, 4:37 PM MDT	Areal Flood Advisory	GJT	3 hr
Aug 8, 2:15 PM MDT	Areal Flood Advisory	GJT	2 hr
Aug 8, 3:54 PM MDT	Flash Flood Warning	GJT	88 min
Aug 8, 4:13 PM MDT	Areal Flood Advisory	GJT	74 min
Aug 9, 5:30 PM MDT	Areal Flood Advisory	GJT	56 min
Aug 9, 6:25 PM MDT	Flash Flood Warning	GJT	3 hr
Aug 10, 1:40 PM MDT	Flash Flood Warning	GJT	3 hr
Aug 10, 2:18 PM MDT	Flood Watch	SLC	34 hr
Aug 10, 4:23 PM MDT	Flash Flood Warning Considerable damage threat	SLC	3 hr
Aug 10, 4:52 PM MDT	Flash Flood Warning	GJT	113 min
Aug 10, 6:28 PM MDT	Special Weather Statement	GJT	32 min
Aug 11, 9:21 AM MDT	Flood Watch	GJT	12 hr
Aug 11, 2:46 PM MDT	Mesoscale Discussion	SPC	119 min
Aug 11, 5:43 PM MDT	Areal Flood Advisory	GJT	2 hr
Aug 11, 7:05 PM MDT	Flash Flood Warning	GJT	115 min
Aug 11, 7:17 PM MDT	Areal Flood Advisory	GJT	101 min
Aug 12, 2:26 PM MDT	Special Weather Statement	GJT	34 min
Aug 12, 2:59 PM MDT	Areal Flood Advisory	GJT	112 min
Aug 13, 5:38 PM MDT	Special Weather Statement	GJT	37 min
Aug 13, 5:50 PM MDT	Flash Flood Warning	GJT	3 hr
Aug 13, 6:10 PM MDT	Flash Flood Warning	GJT	3 hr
Aug 13, 6:17 PM MDT	Flash Flood Warning	GJT	3 hr
Aug 16, 11:27 AM MDT	Flood Watch	SLC	35 hr
Aug 17, 5:19 PM MDT	Special Weather Statement	GJT	26 min
Aug 18, 10:08 AM MDT	Flood Watch	SLC	12 hr
Aug 20, 9:43 PM MDT	Special Weather Statement	GJT	47 min
Aug 20, 10:28 PM MDT	Special Weather Statement	GJT	32 min
Aug 20, 11:04 PM MDT	Special Weather Statement	GJT	26 min
Aug 21, 12:59 PM MDT	Flood Watch	SLC	35 hr
Aug 21, 1:56 PM MDT	Flood Watch	GJT	34 hr
Aug 23, 2:03 PM MDT	Special Weather Statement	GJT	27 min
Aug 23, 2:26 PM MDT	Special Weather Statement	GJT	34 min
Aug 23, 2:32 PM MDT	Special Weather Statement	GJT	28 min
Aug 23, 2:43 PM MDT	Areal Flood Advisory	GJT	3 hr
Aug 23, 2:53 PM MDT	Mesoscale Discussion	SPC	2 hr
Aug 23, 2:59 PM MDT	Special Weather Statement	GJT	31 min
Aug 23, 3:01 PM MDT	Areal Flood Advisory	GJT	3 hr
Aug 23, 3:26 PM MDT	Severe Thunderstorm Warning	GJT	34 min
Aug 23, 3:56 PM MDT	Severe Thunderstorm Warning	GJT	34 min
Aug 23, 4:22 PM MDT	Severe Thunderstorm Warning	GJT	38 min
Aug 23, 4:30 PM MDT	Special Weather Statement	GJT	30 min
Aug 23, 4:37 PM MDT	Flash Flood Warning	GJT	3 hr
Aug 23, 5:29 PM MDT	Special Weather Statement	GJT	31 min
Aug 23, 5:33 PM MDT	Severe Thunderstorm Warning	GJT	27 min
Aug 23, 5:55 PM MDT	Flash Flood Warning	GJT	3 hr
Aug 23, 5:59 PM MDT	Severe Thunderstorm Warning	GJT	31 min
Aug 23, 6:00 PM MDT	Areal Flood Advisory	GJT	3 hr
Aug 23, 6:00 PM MDT	Flash Flood Warning	GJT	3 hr
Aug 23, 6:09 PM MDT	Flash Flood Warning	GJT	7 hr
Aug 23, 6:33 PM MDT	Flash Flood Warning Considerable damage threat	GJT	7 hr
Aug 23, 9:52 PM MDT	Severe Thunderstorm Warning	GJT	23 min
Aug 25, 6:29 AM MDT	Flood Watch	GJT	18 hr
Aug 25, 1:22 PM MDT	Severe Thunderstorm Watch	SPC	7 hr
Aug 25, 3:52 PM MDT	Special Weather Statement	GJT	38 min
Aug 25, 3:57 PM MDT	Mesoscale Discussion	SPC	93 min
Aug 25, 5:26 PM MDT	Flash Flood Warning	GJT	3 hr
Aug 25, 5:29 PM MDT	Flash Flood Warning	GJT	3 hr
Sep 9, 2:04 PM MDT	Fire Weather Watch	SLC	13 hr
Sep 10, 3:05 AM MDT	Red Flag Warning	SLC	65 hr
Sep 10, 1:48 PM MDT	Fire Weather Watch	GJT	13 hr
Sep 11, 2:23 AM MDT	Red Flag Warning	GJT	42 hr
Sep 16, 12:34 PM MDT	Mesoscale Discussion	SPC	116 min
Sep 16, 1:53 PM MDT	Severe Thunderstorm Warning	GJT	27 min
Sep 17, 6:08 AM MDT	Severe Thunderstorm Warning	GJT	22 min
Sep 17, 10:54 AM MDT	Red Flag Warning	SLC	10 hr
Oct 17, 2:14 PM MDT	Winter Weather Advisory	GJT	42 hr
Oct 27, 3:03 PM MDT	Winter Weather Advisory	GJT	3 days
Oct 28, 12:57 PM MDT	Freeze Watch	GJT	24 hr
Oct 29, 1:01 PM MDT	Freeze Warning	GJT	21 hr
Nov 2, 3:00 PM MDT	Winter Weather Advisory	GJT	45 hr
Nov 15, 12:38 AM MST	Wind Advisory	GJT	16 hr
Nov 25, 1:52 AM MST	Winter Storm Warning	GJT	60 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	33
Severe Thunderstorm Watch	3
Mesoscale Discussion	11
Special Weather Statement	26
Flooding
Flash Flood Warning	25
Flood Watch	11
Areal Flood Advisory	21
Winter
Snow Squall Warning	3
Winter Storm Warning	5
Winter Storm Watch	5
Winter Weather Advisory	13
Heat
Excessive Heat Warning	4
Excessive Heat Watch	2
Heat Advisory	1
Cold
Freeze Warning	3
Freeze Watch	3
Wind and dust
Blowing Dust Warning	1
High Wind Warning	4
High Wind Watch	5
Wind Advisory	9
Fire
Red Flag Warning	15
Fire Weather Watch	8

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2023 2025

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.