Weather alerts in Grand County, Utah, 2023

132 weather alerts in 2023, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.

Grand County and its neighbors

Each county as a circle sized by its count in 2023. Tap one for its archive.

Alerts: 132
Warnings: 38
Watches: 24
Advisories: 35
Busiest month: August23 alerts
Busiest day: June 6, 20235 alerts

Over time

By month

Warning verification

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

Grand County, 2023

	Warnings	With a report	False alarm ratio	Reports	Inside a warning
Tornado warnings	0			0
Severe thunderstorm warnings	1	0	100%	4	0%
Flash flood warnings	3	0	100%	0

Each office's whole area, 2023

	Warnings	With a report	False alarm ratio	Reports	Inside a warning	Mean lead time
NWS Grand Junction, CO: severe thunderstorm warnings	14	1	93%	26	4%	8 min
NWS Grand Junction, CO: flash flood warnings	13	2	85%	3	100%	52 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 9, 1:43 PM MST	Winter Weather Advisory	GJT	55 hr
Jan 13, 2:00 PM MST	Winter Weather Advisory	GJT	63 hr
Jan 16, 2:58 AM MST	Winter Storm Warning	GJT	56 hr
Jan 16, 2:58 AM MST	Winter Weather Advisory	GJT	62 hr
Jan 22, 2:32 AM MST	Winter Weather Advisory	GJT	38 hr
Feb 12, 2:09 PM MST	Winter Storm Watch	GJT	24 hr
Feb 13, 2:37 PM MST	Winter Storm Warning	GJT	51 hr
Feb 13, 2:37 PM MST	Winter Weather Advisory	GJT	51 hr
Feb 19, 2:40 PM MST	Winter Storm Watch	GJT	25 hr
Feb 20, 2:31 PM MST	Wind Advisory	GJT	55 hr
Feb 20, 3:40 PM MST	Winter Storm Warning	GJT	4 days
Feb 20, 3:40 PM MST	Winter Weather Advisory	GJT	4 days
Feb 22, 8:13 AM MST	Snow Squall Warning	GJT	32 min
Feb 22, 8:26 AM MST	Mesoscale Discussion	SPC	4 hr
Feb 22, 5:14 PM MST	Special Weather Statement	GJT	31 min
Feb 23, 1:57 PM MST	Snow Squall Warning	GJT	23 min
Feb 24, 4:43 AM MST	Special Weather Statement	GJT	62 min
Feb 25, 2:13 PM MST	Winter Weather Advisory	GJT	3 days
Feb 27, 2:31 AM MST	Winter Weather Advisory	GJT	39 hr
Feb 27, 4:14 PM MST	Winter Storm Watch	GJT	21 hr
Feb 28, 7:36 AM MST	Special Weather Statement	GJT	24 min
Feb 28, 8:30 AM MST	Snow Squall Warning	GJT	30 min
Feb 28, 1:41 PM MST	Winter Storm Warning	GJT	40 hr
Feb 28, 1:41 PM MST	Winter Weather Advisory	GJT	39 hr
Mar 1, 1:27 PM MST	Special Weather Statement	GJT	33 min
Mar 4, 2:31 PM MST	Wind Advisory	GJT	29 hr
Mar 9, 2:18 AM MST	Winter Storm Watch	GJT	11 hr
Mar 9, 1:43 PM MST	Winter Storm Warning	GJT	63 hr
Mar 13, 2:50 PM MDT	Winter Storm Watch	GJT	13 hr
Mar 14, 3:23 AM MDT	Winter Storm Warning	GJT	57 hr
Mar 14, 3:23 AM MDT	Winter Weather Advisory	GJT	57 hr
Mar 18, 3:05 PM MDT	Winter Storm Watch	GJT	37 hr
Mar 18, 3:05 PM MDT	Winter Weather Advisory	GJT	65 hr
Mar 19, 3:04 PM MDT	Winter Storm Warning	GJT	3 days
Mar 20, 4:18 AM MDT	Winter Storm Warning	GJT	68 hr
Mar 20, 4:18 AM MDT	Winter Weather Advisory	GJT	68 hr
Mar 24, 1:46 PM MDT	Special Weather Statement	GJT	44 min
Mar 24, 2:33 PM MDT	Special Weather Statement	GJT	57 min
Mar 24, 3:32 PM MDT	Special Weather Statement	GJT	58 min
Mar 29, 3:24 PM MDT	Wind Advisory	GJT	27 hr
Apr 1, 2:44 AM MDT	High Wind Watch	GJT	24 hr
Apr 2, 2:27 AM MDT	High Wind Warning	GJT	45 hr
Apr 2, 2:26 PM MDT	Wind Advisory	GJT	33 hr
Apr 2, 2:57 PM MDT	Winter Weather Advisory	GJT	54 hr
Apr 13, 3:51 PM MDT	Areal Flood Warning	GJT	56 hr
Apr 17, 1:39 PM MDT	Wind Advisory	GJT	31 hr
Apr 18, 11:12 AM MDT	Areal Flood Advisory	GJT	52 hr
Apr 18, 2:00 PM MDT	Freeze Watch	GJT	12 hr
Apr 19, 2:28 AM MDT	Freeze Warning	GJT	32 hr
Apr 19, 2:48 AM MDT	Freeze Watch	GJT	11 hr
Apr 19, 1:30 PM MDT	Freeze Warning	GJT	45 hr
Apr 24, 6:19 PM MDT	Special Weather Statement	GJT	26 min
Apr 27, 1:56 AM MDT	Wind Advisory	GJT	31 hr
Apr 30, 2:06 PM MDT	Areal Flood Warning	GJT	11 days
May 11, 4:23 PM MDT	Areal Flood Advisory	GJT	14 days
May 14, 4:00 PM MDT	Special Weather Statement	GJT	30 min
May 14, 4:29 PM MDT	Special Weather Statement	GJT	46 min
May 14, 4:37 PM MDT	Special Weather Statement	GJT	38 min
May 15, 1:21 PM MDT	River Flood Advisory	GJT	14 days
May 15, 1:33 PM MDT	River Flood Advisory	GJT	14 days
Jun 6, 3:38 PM MDT	Special Weather Statement	GJT	37 min
Jun 6, 4:11 PM MDT	Special Weather Statement	GJT	34 min
Jun 6, 4:23 PM MDT	Special Weather Statement	GJT	37 min
Jun 6, 4:39 PM MDT	Special Weather Statement	GJT	36 min
Jun 6, 4:48 PM MDT	Special Weather Statement	GJT	27 min
Jun 6, 6:32 PM MDT	Special Weather Statement	GJT	28 min
Jun 6, 7:00 PM MDT	Special Weather Statement	GJT	30 min
Jun 14, 4:51 PM MDT	Special Weather Statement	GJT	24 min
Jun 15, 4:28 PM MDT	Special Weather Statement	GJT	32 min
Jun 18, 2:05 PM MDT	Wind Advisory	GJT	30 hr
Jun 21, 2:15 PM MDT	Red Flag Warning	GJT	55 hr
Jun 22, 1:47 PM MDT	Wind Advisory	GJT	30 hr
Jun 25, 1:59 AM MDT	Fire Weather Watch	GJT	12 hr
Jun 25, 1:59 AM MDT	Fire Weather Watch	GJT	12 hr
Jun 25, 1:29 PM MDT	Red Flag Warning	GJT	32 hr
Jun 25, 1:29 PM MDT	Red Flag Warning	GJT	56 hr
Jun 26, 2:24 PM MDT	Wind Advisory	GJT	31 hr
Jun 27, 2:34 AM MDT	Fire Weather Watch	GJT	11 hr
Jun 27, 1:17 PM MDT	Fire Weather Watch	GJT	12 hr
Jun 27, 1:17 PM MDT	Red Flag Warning	GJT	31 hr
Jun 28, 1:06 AM MDT	Red Flag Warning	GJT	43 hr
Jul 2, 2:59 PM MDT	Fire Weather Watch	GJT	11 hr
Jul 3, 2:13 AM MDT	Red Flag Warning	GJT	43 hr
Jul 5, 2:35 AM MDT	Fire Weather Watch	GJT	13 hr
Jul 5, 3:17 PM MDT	Fire Weather Watch	GJT	23 hr
Jul 5, 3:17 PM MDT	Red Flag Warning	GJT	31 hr
Jul 6, 2:29 PM MDT	Red Flag Warning	GJT	31 hr
Jul 7, 4:00 AM MDT	Fire Weather Watch	GJT	10 hr
Jul 7, 2:07 PM MDT	Red Flag Warning	GJT	31 hr
Jul 14, 2:30 PM MDT	Heat Advisory	GJT	3 days
Jul 18, 2:45 PM MDT	Special Weather Statement	GJT	30 min
Jul 25, 5:37 PM MDT	Special Weather Statement	GJT	23 min
Jul 31, 9:32 PM MDT	Special Weather Statement	GJT	28 min
Jul 31, 9:57 PM MDT	Special Weather Statement	GJT	33 min
Jul 31, 11:01 PM MDT	Special Weather Statement	GJT	29 min
Aug 2, 6:02 PM MDT	Areal Flood Advisory	GJT	118 min
Aug 3, 3:50 PM MDT	Special Weather Statement	GJT	40 min
Aug 3, 4:30 PM MDT	Severe Thunderstorm Warning	GJT	45 min
Aug 5, 2:26 PM MDT	Fire Weather Watch	GJT	12 hr
Aug 5, 2:26 PM MDT	Fire Weather Watch	GJT	48 hr
Aug 5, 2:26 PM MDT	Red Flag Warning	GJT	31 hr
Aug 6, 2:45 AM MDT	Red Flag Warning	GJT	42 hr
Aug 7, 2:09 PM MDT	Red Flag Warning	GJT	31 hr
Aug 14, 5:11 PM MDT	Flash Flood Warning	GJT	3 hr
Aug 15, 2:39 PM MDT	Flash Flood Watch	GJT	5 hr
Aug 15, 3:21 PM MDT	Special Weather Statement	GJT	24 min
Aug 16, 3:48 PM MDT	Areal Flood Advisory	GJT	3 hr
Aug 16, 4:51 PM MDT	Areal Flood Advisory	GJT	4 hr
Aug 17, 3:13 PM MDT	Flash Flood Warning	GJT	3 hr
Aug 17, 4:42 PM MDT	Flash Flood Warning Considerable damage threat	GJT	2 hr
Aug 18, 5:24 PM MDT	Special Weather Statement	GJT	21 min
Aug 18, 6:04 PM MDT	Areal Flood Advisory	GJT	3 hr
Aug 22, 4:05 PM MDT	Special Weather Statement	GJT	25 min
Aug 26, 6:38 PM MDT	Special Weather Statement	GJT	37 min
Aug 31, 2:07 AM MDT	Red Flag Warning	GJT	18 hr
Sep 1, 7:02 PM MDT	Special Weather Statement	GJT	28 min
Sep 1, 7:39 PM MDT	Special Weather Statement	GJT	36 min
Sep 19, 5:49 PM MDT	Special Weather Statement	GJT	26 min
Sep 26, 1:52 PM MDT	Fire Weather Watch	GJT	24 hr
Sep 27, 1:50 PM MDT	Fire Weather Watch	GJT	24 hr
Sep 27, 1:50 PM MDT	Red Flag Warning	GJT	30 hr
Sep 28, 1:41 PM MDT	Fire Weather Watch	GJT	24 hr
Sep 28, 1:41 PM MDT	Red Flag Warning	GJT	30 hr
Sep 29, 1:44 PM MDT	Red Flag Warning	GJT	30 hr
Sep 30, 2:14 PM MDT	Wind Advisory	GJT	29 hr
Oct 11, 3:39 PM MDT	Special Weather Statement	GJT	36 min
Oct 28, 1:13 PM MDT	Freeze Watch	GJT	14 hr
Oct 29, 2:50 AM MDT	Freeze Warning	GJT	33 hr
Nov 18, 2:43 PM MST	Winter Weather Advisory	GJT	38 hr
Nov 22, 2:39 AM MST	Winter Weather Advisory	GJT	3 days
Nov 23, 1:58 AM MST	Winter Storm Warning	GJT	57 hr
Dec 21, 2:38 PM MST	Winter Weather Advisory	GJT	68 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	1
Mesoscale Discussion	1
Special Weather Statement	34
Flooding
Areal Flood Warning	2
Flash Flood Warning	3
Flash Flood Watch	1
Areal Flood Advisory	6
River Flood Advisory	2
Winter
Snow Squall Warning	3
Winter Storm Warning	9
Winter Storm Watch	6
Winter Weather Advisory	16
Heat
Heat Advisory	1
Cold
Freeze Warning	3
Freeze Watch	3
Wind and dust
High Wind Warning	1
High Wind Watch	1
Wind Advisory	10
Fire
Red Flag Warning	16
Fire Weather Watch	13

The busiest days

Days with the most alerts issued, by UTC date.

Nearby

Alerts in force now Tornadoes on record Forecast The radar archive 2022 2024

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.