Weather alerts in Montana, May 2011

192 weather alerts in May 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered any part of the state, so the counties below add up to more than the state.

Weather alerts by county

Each county as a circle sized by its count in May 2011. Tap one for its archive.

Alerts: 192
Warnings: 103
Watches: 36
Advisories: 44
Busiest day: May 24, 201123 alerts

Over time

By day

Days in UTC, the clock the archive keeps.

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	Counties	Lasted
May 3, 11:42 AM MDT	Lake Wind Advisory	GGW	Garfield, McCone, Petroleum, Phillips, Valley	15 hr
May 3, 12:15 PM MDT	High Wind Warning	TFX		8 hr
May 4, 3:43 AM MDT	Lake Wind Advisory	GGW	Garfield, McCone, Petroleum, Phillips, Valley	17 hr
May 5, 2:24 PM MDT	Lake Wind Advisory	GGW	Garfield, McCone, Petroleum, Phillips, Valley	29 hr
May 7, 2:51 PM MDT	Winter Storm Watch	TFX		13 hr
May 7, 3:31 PM MDT	Winter Storm Watch	BYZ	Carbon, Park, Stillwater, Sweet Grass, Wheatland	12 hr
May 7, 9:01 PM MDT	Winter Storm Watch	MSO	Deer Lodge, Granite, Powell, Silver Bow	17 hr
May 8, 3:40 AM MDT	Winter Storm Warning	BYZ	Carbon, Park, Stillwater, Sweet Grass, Wheatland	62 hr
May 8, 4:17 AM MDT	Winter Storm Warning	TFX		51 hr
May 8, 1:34 PM MDT	Areal Flood Advisory	TFX	Fergus, Judith Basin	51 hr
May 8, 1:58 PM MDT	Winter Storm Warning	MSO	Deer Lodge, Granite, Powell, Silver Bow	22 hr
May 8, 1:58 PM MDT	Winter Weather Advisory	MSO	Granite, Missoula, Ravalli	19 hr
May 8, 2:53 PM MDT	Lake Wind Advisory	GGW	Garfield, McCone, Petroleum, Phillips, Valley	53 hr
May 9, 10:53 AM MDT	Areal Flood Advisory	TFX	Cascade	30 hr
May 9, 4:07 PM MDT	Areal Flood Advisory	TFX	Gallatin	25 hr
May 9, 6:55 PM MDT	Winter Weather Advisory	MSO	Deer Lodge, Granite, Powell, Silver Bow	8 hr
May 9, 8:34 PM MDT	Flood Watch	BYZ	Big Horn, Carter, Custer, Fallon, Musselshell, Powder River and 3 more	19 hr
May 9, 8:39 PM MDT	Flood Watch	GGW	Dawson, Garfield, McCone, Prairie, Richland, Roosevelt and 2 more	23 hr
May 9, 10:19 PM MDT	Special Weather Statement	BYZ	Carter	56 min
May 9, 10:55 PM MDT	Areal Flood Advisory	GGW	Dawson, Richland, Roosevelt	6 hr
May 9, 11:25 PM MDT	Special Weather Statement	BYZ	Carter	65 min
May 10, 12:40 AM MDT	Areal Flood Advisory	GGW	Richland, Roosevelt, Sheridan	24 hr
May 10, 2:31 AM MDT	Areal Flood Warning	BYZ	Park	11 hr
May 10, 3:24 AM MDT	Areal Flood Warning	GGW	Garfield, Petroleum	6 hr
May 10, 5:30 AM MDT	Areal Flood Advisory	GGW	Dawson, Richland, Roosevelt	18 hr
May 10, 8:31 AM MDT	Areal Flood Advisory	GGW	Dawson, Garfield, McCone, Prairie	23 hr
May 10, 8:46 AM MDT	Areal Flood Warning	BYZ	Big Horn, Custer, Musselshell, Rosebud, Treasure, Yellowstone	24 hr
May 10, 9:08 AM MDT	Areal Flood Warning	GGW	Garfield, Petroleum	24 hr
May 10, 9:54 AM MDT	Areal Flood Warning	BYZ	Park	32 hr
May 10, 10:59 AM MDT	River Flood Watch	GGW	Valley	37 hr
May 10, 10:59 AM MDT	River Flood Watch	GGW	Valley	68 hr
May 10, 12:04 PM MDT	Areal Flood Warning	GGW	Dawson, Garfield, McCone, Valley	12 hr
May 10, 12:08 PM MDT	River Flood Watch	TFX		6 days
May 10, 3:41 PM MDT	Areal Flood Advisory	BYZ	Carbon	17 hr
May 10, 4:17 PM MDT	Areal Flood Warning	TFX	Fergus	43 hr
May 10, 4:21 PM MDT	Areal Flood Advisory	TFX	Cascade, Gallatin, Judith Basin	4 days
May 11, 12:08 AM MDT	Areal Flood Warning	GGW	Valley	12 hr
May 11, 8:09 AM MDT	Areal Flood Warning	GGW	Garfield, Petroleum	70 hr
May 11, 9:02 AM MDT	Areal Flood Warning	BYZ	Big Horn	24 hr
May 11, 9:07 AM MDT	River Flood Warning	BYZ	Custer	9 hr
May 11, 12:08 PM MDT	Areal Flood Advisory	GGW	Valley	21 hr
May 11, 12:18 PM MDT	Flood Watch	MSO	Lincoln	23 hr
May 11, 5:58 PM MDT	Areal Flood Advisory	BYZ	Park	15 hr
May 12, 8:48 AM MDT	Areal Flood Advisory	GGW	Phillips, Valley	54 hr
May 12, 10:55 AM MDT	Areal Flood Warning	MSO	Lincoln	5 days
May 12, 12:03 PM MDT	Areal Flood Advisory	TFX	Fergus	47 hr
May 12, 9:32 PM MDT	Flood Watch	MSO	Lincoln, Missoula, Ravalli, Sanders	5 days
May 14, 3:15 AM MDT	Wind Advisory	MSO	Flathead, Lake, Missoula, Ravalli, Sanders	19 hr
May 14, 4:00 AM MDT	High Wind Watch	GGW	Garfield, McCone, Petroleum, Phillips, Valley	24 hr
May 14, 4:00 AM MDT	Lake Wind Advisory	GGW	Garfield, McCone, Petroleum, Phillips, Valley	62 hr
May 14, 4:18 AM MDT	High Wind Watch	TFX		10 hr
May 14, 5:55 AM MDT	Areal Flood Advisory	GGW	Garfield, Petroleum	50 hr
May 14, 9:43 AM MDT	Areal Flood Warning	BYZ	Park	3 days
May 14, 11:43 AM MDT	Areal Flood Advisory	TFX	Cascade, Fergus, Judith Basin	5 days
May 14, 2:39 PM MDT	High Wind Warning	TFX		31 hr
May 14, 4:04 PM MDT	Areal Flood Advisory	MSO	Ravalli	52 hr
May 14, 5:05 PM MDT	Areal Flood Warning	BYZ	Park	69 hr
May 14, 10:44 PM MDT	Wind Advisory	MSO	Missoula, Ravalli	5 hr
May 15, 7:50 AM MDT	Areal Flood Warning	MSO	Sanders	59 hr
May 15, 2:57 PM MDT	High Wind Watch	BYZ	Carter, Fallon	13 hr
May 15, 3:07 PM MDT	High Wind Watch	GGW	Wibaux	12 hr
May 15, 6:39 PM MDT	Mesoscale Discussion	SPC	Beaverhead, Madison	96 min
May 15, 9:58 PM MDT	High Wind Warning	TFX		5 hr
May 16, 3:19 AM MDT	High Wind Warning	GGW	Wibaux	18 hr
May 16, 3:43 AM MDT	High Wind Warning	BYZ	Carter, Fallon	17 hr
May 16, 10:11 AM MDT	Areal Flood Advisory	GGW	Petroleum	48 hr
May 16, 10:20 PM MDT	Areal Flood Warning	MSO	Lincoln	10 hr
May 17, 9:01 AM MDT	Flood Watch	GGW	Daniels, Garfield, McCone, Prairie, Roosevelt, Valley	3 hr
May 17, 9:20 AM MDT	Areal Flood Warning	MSO	Lincoln	14 min
May 17, 9:38 AM MDT	Areal Flood Warning	MSO	Flathead	24 hr
May 17, 11:53 AM MDT	Areal Flood Warning	GGW	Daniels, Dawson, Garfield, McCone, Phillips, Prairie and 4 more	48 hr
May 17, 3:35 PM MDT	Flood Watch	BYZ	Big Horn, Carbon, Carter, Custer, Fallon, Golden Valley and 9 more	5 days
May 17, 6:55 PM MDT	Areal Flood Warning	MSO	Flathead	6 days
May 17, 7:14 PM MDT	Areal Flood Advisory	MSO	Flathead	4 days
May 18, 3:18 AM MDT	Winter Storm Watch	BYZ	Carbon, Park, Stillwater, Sweet Grass	24 hr
May 18, 2:47 PM MDT	Flood Watch	GGW	Daniels, Dawson, Garfield, McCone, Petroleum, Phillips and 6 more	44 hr
May 18, 6:17 PM MDT	Special Weather Statement	MSO		43 min
May 19, 3:14 AM MDT	Winter Storm Warning	BYZ	Carbon, Park, Stillwater, Sweet Grass	3 days
May 19, 3:23 AM MDT	Flood Watch	TFX		20 days
May 19, 1:02 PM MDT	Areal Flood Warning	TFX	Fergus, Judith Basin	44 hr
May 19, 8:19 PM MDT	Lake Wind Advisory	GGW	Garfield, McCone, Phillips, Valley	27 hr
May 20, 7:59 AM MDT	Areal Flood Warning	GGW	Petroleum	69 hr
May 20, 9:51 AM MDT	Areal Flood Warning	BYZ	Carter, Fallon	48 hr
May 20, 10:06 AM MDT	Areal Flood Warning	GGW	Dawson, Garfield, McCone, Petroleum, Prairie, Richland and 1 more	67 hr
May 20, 10:19 AM MDT	Areal Flood Warning	GGW	Daniels, Phillips, Roosevelt, Sheridan, Valley	6 days
May 20, 11:00 AM MDT	Areal Flood Warning	TFX	Chouteau	22 hr
May 20, 11:04 AM MDT	River Flood Warning	BYZ	Big Horn	6 days
May 20, 3:50 PM MDT	Areal Flood Warning	BYZ	Carbon, Stillwater, Sweet Grass	71 hr
May 20, 8:50 PM MDT	Special Weather Statement	GGW	Prairie	55 min
May 20, 9:06 PM MDT	Areal Flood Warning	BYZ	Custer	39 hr
May 20, 9:51 PM MDT	Special Weather Statement	GGW	Prairie	54 min
May 21, 12:37 AM MDT	River Flood Warning	BYZ	Custer	59 hr
May 21, 4:00 AM MDT	Lake Wind Advisory	GGW	Garfield, McCone, Phillips, Valley	17 hr
May 21, 8:21 AM MDT	River Flood Warning	GGW	Dawson	6 days
May 21, 8:21 AM MDT	River Flood Warning	GGW	Richland	7 days
May 21, 8:59 AM MDT	Areal Flood Warning	TFX	Cascade, Chouteau, Fergus, Judith Basin	6 hr
May 21, 10:09 AM MDT	River Flood Watch	TFX		24 hr
May 21, 11:11 AM MDT	Areal Flood Warning	BYZ	Carter	22 hr
May 21, 12:52 PM MDT	Areal Flood Warning	BYZ	Yellowstone	19 hr
May 21, 2:33 PM MDT	Areal Flood Warning	BYZ	Rosebud, Treasure	22 hr
May 21, 3:25 PM MDT	Areal Flood Warning	TFX	Blaine, Cascade, Chouteau, Fergus, Judith Basin	48 hr
May 21, 10:23 PM MDT	Areal Flood Advisory	TFX	Gallatin	23 hr
May 21, 11:15 PM MDT	Areal Flood Warning	BYZ	Yellowstone	36 hr
May 21, 11:45 PM MDT	River Flood Warning	GGW	Valley	38 days
May 22, 7:33 AM MDT	Areal Flood Warning	BYZ	Musselshell, Yellowstone	28 hr
May 22, 7:42 AM MDT	River Flood Warning	BYZ	Rosebud, Treasure	7 days
May 22, 7:42 AM MDT	River Flood Warning	BYZ	Custer	7 days
May 22, 8:21 AM MDT	Areal Flood Warning	TFX	Blaine, Cascade, Chouteau, Fergus, Judith Basin, Meagher	36 days
May 22, 9:34 AM MDT	Areal Flood Warning	BYZ	Carter, Fallon	5 days
May 22, 11:05 AM MDT	River Flood Warning	GGW	Valley	36 days
May 22, 4:39 PM MDT	Special Weather Statement	GGW	Phillips	51 min
May 22, 4:52 PM MDT	Areal Flood Warning	MSO	Lincoln	72 hr
May 23, 4:16 AM MDT	Areal Flood Warning	GGW	Garfield, Petroleum	36 days
May 23, 4:29 AM MDT	Areal Flood Warning	GGW	Dawson, Prairie, Richland, Wibaux	3 days
May 23, 9:52 AM MDT	Flood Watch	BYZ	Big Horn, Carbon, Golden Valley, Musselshell, Park, Rosebud and 5 more	48 hr
May 23, 10:06 AM MDT	River Flood Warning	BYZ	Park	3 days
May 23, 10:41 AM MDT	Areal Flood Warning	BYZ	Yellowstone	27 hr
May 23, 11:10 AM MDT	Areal Flood Warning	BYZ	Golden Valley, Musselshell, Wheatland	26 hr
May 23, 11:44 AM MDT	Areal Flood Warning	MSO	Missoula	72 hr
May 23, 1:05 PM MDT	River Flood Watch	TFX		23 hr
May 23, 2:37 PM MDT	Areal Flood Warning	BYZ	Carbon, Stillwater, Sweet Grass	3 days
May 23, 2:37 PM MDT	Flood Watch	MSO	Missoula, Ravalli	72 hr
May 23, 2:41 PM MDT	Lake Wind Advisory	GGW	Garfield, McCone, Petroleum, Phillips, Valley	29 hr
May 23, 2:50 PM MDT	Areal Flood Warning	BYZ	Powder River	72 hr
May 23, 3:39 PM MDT	Flash Flood Warning	BYZ	Stillwater	2 hr
May 23, 4:06 PM MDT	Flash Flood Warning	BYZ	Big Horn	3 hr
May 23, 7:21 PM MDT	Flash Flood Warning	BYZ	Stillwater	4 hr
May 23, 8:55 PM MDT	Areal Flood Advisory	TFX	Glacier	6 days
May 23, 9:47 PM MDT	Areal Flood Advisory	TFX	Hill	7 days
May 24, 1:44 AM MDT	Flash Flood Warning	BYZ	Big Horn	3 hr
May 24, 2:10 AM MDT	River Flood Warning	GGW	Valley	32 days
May 24, 4:48 AM MDT	River Flood Watch	TFX		7 hr
May 24, 9:55 AM MDT	River Flood Warning	GGW	Phillips, Valley	4 days
May 24, 9:56 AM MDT	Areal Flood Advisory	MSO	Powell	71 hr
May 24, 10:31 AM MDT	River Flood Warning	TFX	Gallatin	3 days
May 24, 10:31 AM MDT	River Flood Warning	TFX	Beaverhead, Madison	3 days
May 24, 10:31 AM MDT	River Flood Warning	TFX	Cascade	4 days
May 24, 10:31 AM MDT	River Flood Warning	TFX	Lewis and Clark	4 days
May 24, 10:37 AM MDT	River Flood Watch	TFX		41 hr
May 24, 10:37 AM MDT	River Flood Watch	TFX		41 hr
May 24, 10:37 AM MDT	River Flood Watch	TFX		3 days
May 24, 12:33 PM MDT	Areal Flood Warning	BYZ	Stillwater, Sweet Grass	69 hr
May 24, 12:43 PM MDT	Areal Flood Warning	BYZ	Golden Valley, Musselshell, Wheatland	48 hr
May 24, 1:16 PM MDT	Areal Flood Warning	BYZ	Yellowstone	47 hr
May 24, 1:24 PM MDT	Areal Flood Advisory	MSO	Flathead, Lake, Lincoln, Mineral, Sanders	72 hr
May 24, 3:41 PM MDT	Special Weather Statement	BYZ	Big Horn	64 min
May 24, 3:52 PM MDT	Flash Flood Warning	BYZ	Big Horn, Yellowstone	3 hr
May 24, 4:37 PM MDT	Areal Flood Advisory	MSO	Deer Lodge, Granite, Silver Bow	68 hr
May 24, 4:45 PM MDT	Flash Flood Warning	BYZ	Yellowstone	3 hr
May 25, 3:12 AM MDT	Winter Weather Advisory	MSO	Flathead, Granite, Lake, Lincoln, Mineral, Missoula and 2 more	54 hr
May 25, 3:30 AM MDT	Lake Wind Advisory	GGW	Garfield, McCone, Petroleum, Phillips, Valley	39 hr
May 25, 7:12 AM MDT	Areal Flood Warning	MSO	Granite, Missoula	53 hr
May 25, 4:24 PM MDT	Areal Flood Warning	MSO	Lincoln	54 hr
May 25, 4:30 PM MDT	River Flood Warning	BYZ	Stillwater, Yellowstone	20 hr
May 26, 11:18 AM MDT	Areal Flood Warning	MSO	Missoula	3 days
May 26, 11:54 AM MDT	Areal Flood Warning	BYZ	Golden Valley, Musselshell, Wheatland	9 days
May 26, 2:01 PM MDT	River Flood Warning	BYZ	Rosebud	69 hr
May 26, 2:15 PM MDT	Areal Flood Warning	BYZ	Park	20 hr
May 26, 2:52 PM MDT	High Wind Warning	TFX		27 hr
May 26, 3:41 PM MDT	Areal Flood Warning	BYZ	Stillwater, Sweet Grass	18 hr
May 26, 6:28 PM MDT	Special Weather Statement	BYZ	Carter	32 min
May 27, 2:29 AM MDT	Lake Wind Advisory	GGW	Garfield, McCone, Phillips, Valley	18 hr
May 27, 3:13 AM MDT	Flood Watch	MSO	Flathead	8 hr
May 27, 3:24 AM MDT	Flood Watch	GGW	Daniels, Dawson, Garfield, McCone, Petroleum, Phillips and 6 more	4 days
May 27, 3:48 AM MDT	Flood Watch	BYZ	Big Horn, Carbon, Carter, Custer, Fallon, Golden Valley and 9 more	4 days
May 27, 1:13 PM MDT	Areal Flood Advisory	MSO	Flathead, Lincoln, Sanders	21 hr
May 28, 3:37 AM MDT	Lake Wind Advisory	GGW	Garfield, McCone, Petroleum, Phillips, Valley	16 hr
May 28, 3:52 AM MDT	Winter Storm Watch	BYZ	Carbon, Park, Stillwater, Sweet Grass, Wheatland	24 hr
May 28, 10:54 AM MDT	River Flood Warning	GGW	Dawson	63 hr
May 28, 2:27 PM MDT	Winter Weather Advisory	MSO	Deer Lodge, Granite, Missoula, Powell, Ravalli, Silver Bow	55 hr
May 28, 2:49 PM MDT	Winter Storm Watch	TFX		14 hr
May 28, 6:31 PM MDT	Areal Flood Warning	MSO	Flathead	62 hr
May 29, 3:04 AM MDT	Lake Wind Advisory	GGW	Garfield, McCone, Petroleum, Phillips, Valley	42 hr
May 29, 3:49 AM MDT	Winter Storm Warning	BYZ	Carbon, Park, Stillwater, Sweet Grass, Wheatland	40 hr
May 29, 4:24 AM MDT	Winter Storm Warning	TFX		44 hr
May 29, 8:22 AM MDT	River Flood Warning	GGW	Richland	66 hr
May 29, 12:31 PM MDT	Areal Flood Warning	BYZ	Carbon, Stillwater	29 hr
May 29, 12:43 PM MDT	Areal Flood Warning	BYZ	Big Horn	4 days
May 29, 12:57 PM MDT	Areal Flood Warning	BYZ	Yellowstone	29 hr
May 29, 8:20 PM MDT	Areal Flood Warning	BYZ	Powder River, Rosebud	37 hr
May 29, 10:24 PM MDT	Areal Flood Warning	BYZ	Carter, Fallon	35 hr
May 30, 12:18 AM MDT	Areal Flood Warning	BYZ	Custer, Rosebud, Treasure	35 hr
May 30, 12:55 AM MDT	Areal Flood Warning	GGW	Dawson, Prairie, Richland, Wibaux	36 hr
May 30, 2:51 AM MDT	High Wind Watch	GGW	Daniels, Dawson, McCone, Prairie, Richland, Roosevelt and 3 more	18 hr
May 30, 3:59 AM MDT	High Wind Watch	BYZ	Custer, Fallon	16 hr
May 30, 12:06 PM MDT	River Flood Watch	TFX		25 hr
May 30, 8:48 PM MDT	Areal Flood Warning	GGW	Phillips, Valley	12 days
May 30, 9:17 PM MDT	Lake Wind Advisory	GGW	Garfield, McCone, Petroleum, Phillips, Valley	17 hr
May 31, 6:04 AM MDT	River Flood Warning	BYZ	Rosebud	3 days
May 31, 11:05 AM MDT	River Flood Watch	TFX		7 days
May 31, 11:07 AM MDT	Areal Flood Warning	BYZ	Treasure	52 hr
May 31, 12:40 PM MDT	River Flood Warning	GGW	Dawson	18 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
Mesoscale Discussion	1
Special Weather Statement	8
Flooding
Areal Flood Warning	63
Flash Flood Warning	6
River Flood Warning	22
Flood Watch	13
River Flood Watch	11
Areal Flood Advisory	25
Winter
Winter Storm Warning	6
Winter Storm Watch	6
Winter Weather Advisory	4
Wind and dust
High Wind Warning	6
High Wind Watch	6
Lake Wind Advisory	13
Wind Advisory	2

By county

Every county with at least one alert. A county page lists each alert that covered it.

10 more counties

Nearby

Alerts in force now Tornadoes on record The radar archive 2010 2012

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. Rebuilt daily.