Alert archive / Alaska / Winter Weather Advisories
Winter Weather Advisories in Alaska, 2026
155 winter weather advisories in 2026. An alert counts here when it covered any part of the state, so the counties below add up to more than the state. The archive of winter weather advisories reaches back to 2005.
Winter Weather Advisories by county
Each county as a circle sized by its count in 2026. Tap one for its archive.
- Winter Weather Advisories
- 155
- Busiest month
- March49 winter weather advisories
- Busiest day
- March 5, 20265 winter weather advisories
Over time
By month
The alerts
Every alert, in the order issued. Times are local, Alaska Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 2, 12:06 PM AKST | Winter Weather Advisory | AJK | Ketchikan Gateway, Prince of Wales-Hyder Census Area, Sitka City and | 15 hr |
| Jan 3, 1:00 PM AKST | Winter Weather Advisory | AFC | Lake and Peninsula | 32 hr |
| Jan 3, 2:14 PM AKST | Winter Weather Advisory | AFC | Anchorage Municipality, Chugach Census Area, Kenai Peninsula, Matanuska-Susitna | 4 days |
| Jan 4, 1:14 PM AKST | Winter Weather Advisory | AJK | Ketchikan Gateway, Prince of Wales-Hyder Census Area, Sitka City and | 26 hr |
| Jan 5, 11:32 AM AKST | Winter Weather Advisory | AFG | Kusilvak Census Area, Nome Census Area, North Slope, Northwest Arctic, Southeast Fairbanks Census Area | 43 hr |
| Jan 5, 5:57 PM AKST | Winter Weather Advisory | AJK | Skagway Municipality, Yakutat City and | 15 hr |
| Jan 7, 2:57 AM AKST | Winter Weather Advisory | AFC | Aleutians East, Bethel Census Area, Dillingham Census Area | 3 days |
| Jan 8, 5:23 AM AKST | Winter Weather Advisory | AFC | Anchorage Municipality, Chugach Census Area, Copper River Census Area, Kenai Peninsula, Kodiak Island, Matanuska-Susitna | 3 days |
| Jan 8, 7:45 AM AKST | Winter Weather Advisory | AJK | Hoonah-Angoon Census Area, Juneau City and | 25 hr |
| Jan 8, 2:36 PM AKST | Winter Weather Advisory | AFG | Denali, Fairbanks North Star, Nome Census Area, Northwest Arctic, Southeast Fairbanks Census Area, Yukon-Koyukuk Census Area | 71 hr |
| Jan 9, 2:19 PM AKST | Winter Weather Advisory | AFC | Copper River Census Area | 23 hr |
| Jan 12, 12:09 AM AKST | Winter Weather Advisory | AJK | Haines, Yakutat City and | 7 hr |
| Jan 12, 8:19 AM AKST | Winter Weather Advisory | AFG | Southeast Fairbanks Census Area | 14 hr |
| Jan 12, 10:54 AM AKST | Winter Weather Advisory | AFC | Aleutians West Census Area, Lake and Peninsula | 3 days |
| Jan 12, 10:25 PM AKST | Winter Weather Advisory | AFG | North Slope | 13 hr |
| Jan 13, 11:45 AM AKST | Winter Weather Advisory | AFC | Anchorage Municipality, Chugach Census Area, Matanuska-Susitna | 27 hr |
| Jan 14, 11:03 AM AKST | Winter Weather Advisory | AFG | Fairbanks North Star, Kusilvak Census Area, Nome Census Area, North Slope, Northwest Arctic, Yukon-Koyukuk Census Area | 62 hr |
| Jan 14, 2:36 PM AKST | Winter Weather Advisory | AFG | North Slope | 16 hr |
| Jan 14, 3:07 PM AKST | Winter Weather Advisory | AFC | Aleutians East, Bethel Census Area | 46 hr |
| Jan 14, 4:41 PM AKST | Winter Weather Advisory | AFC | Anchorage Municipality, Copper River Census Area, Kenai Peninsula, Matanuska-Susitna | 47 hr |
| Jan 17, 3:39 AM AKST | Winter Weather Advisory | AFC | Anchorage Municipality, Kenai Peninsula, Matanuska-Susitna | 23 hr |
| Jan 17, 5:13 PM AKST | Winter Weather Advisory | AFG | Yukon-Koyukuk Census Area | 18 hr |
| Jan 22, 9:45 AM AKST | Winter Weather Advisory | AFG | Nome Census Area, North Slope, Northwest Arctic | 59 hr |
| Jan 25, 6:56 AM AKST | Winter Weather Advisory | AFC | Bethel Census Area | 9 hr |
| Jan 25, 12:48 PM AKST | Winter Weather Advisory | AJK | Haines, Skagway Municipality | 44 hr |
| Jan 25, 1:55 PM AKST | Winter Weather Advisory | AFC | Anchorage Municipality, Chugach Census Area, Copper River Census Area, Kenai Peninsula, Matanuska-Susitna | 59 hr |
| Jan 25, 2:22 PM AKST | Winter Weather Advisory | AFG | Nome Census Area, North Slope, Northwest Arctic, Southeast Fairbanks Census Area | 60 hr |
| Jan 25, 6:01 PM AKST | Winter Weather Advisory | AJK | Juneau City and, Yakutat City and | 11 hr |
| Jan 27, 2:49 PM AKST | Winter Weather Advisory | AFC | Aleutians West Census Area | 15 hr |
| Jan 29, 3:38 AM AKST | Winter Weather Advisory | AFC | Anchorage Municipality, Kenai Peninsula | 21 hr |
| Jan 29, 2:45 PM AKST | Winter Weather Advisory | AFG | North Slope | 13 hr |
| Jan 31, 1:35 PM AKST | Winter Weather Advisory | AFG | North Slope | 67 hr |
| Feb 2, 8:39 AM AKST | Winter Weather Advisory | AFC | Kenai Peninsula | 4 hr |
| Feb 2, 10:06 AM AKST | Winter Weather Advisory | AFG | Northwest Arctic | 21 hr |
| Feb 2, 12:20 PM AKST | Winter Weather Advisory | AFG | Yukon-Koyukuk Census Area | 63 hr |
| Feb 2, 2:15 PM AKST | Winter Weather Advisory | AFC | Bristol Bay, Dillingham Census Area, Lake and Peninsula | 39 hr |
| Feb 4, 6:14 PM AKST | Winter Weather Advisory | AFC | Aleutians West Census Area, Bethel Census Area | 42 hr |
| Feb 5, 5:52 AM AKST | Winter Weather Advisory | AFC | Chugach Census Area, Copper River Census Area | 10 hr |
| Feb 6, 1:08 PM AKST | Winter Weather Advisory | AFG | Southeast Fairbanks Census Area | 3 days |
| Feb 7, 9:03 PM AKST | Winter Weather Advisory | AFC | Copper River Census Area | 48 hr |
| Feb 8, 4:13 PM AKST | Winter Weather Advisory | AFC | Aleutians West Census Area | 53 hr |
| Feb 9, 11:53 AM AKST | Winter Weather Advisory | AFG | Kusilvak Census Area, Nome Census Area | 3 days |
| Feb 9, 1:45 PM AKST | Winter Weather Advisory | AFC | Chugach Census Area, Copper River Census Area, Kenai Peninsula, Matanuska-Susitna | 43 hr |
| Feb 9, 1:49 PM AKST | Winter Weather Advisory | AFG | Southeast Fairbanks Census Area, Yukon-Koyukuk Census Area | 57 hr |
| Feb 10, 4:32 AM AKST | Winter Weather Advisory | AJK | Skagway Municipality | 31 hr |
| Feb 10, 10:14 AM AKST | Winter Weather Advisory | AFG | North Slope | 35 hr |
| Feb 11, 11:43 AM AKST | Winter Weather Advisory | AJK | Skagway Municipality | 27 hr |
| Feb 12, 1:05 AM AKST | Winter Weather Advisory | AFC | Kenai Peninsula | 7 hr |
| Feb 12, 1:23 PM AKST | Winter Weather Advisory | AFG | Nome Census Area, Northwest Arctic | 38 hr |
| Feb 12, 2:48 PM AKST | Winter Weather Advisory | AFC | Bethel Census Area, Bristol Bay, Dillingham Census Area, Lake and Peninsula | 42 hr |
| Feb 13, 1:44 AM AKST | Winter Weather Advisory | AFG | North Slope | 10 hr |
| Feb 13, 3:23 PM AKST | Winter Weather Advisory | AFC | Anchorage Municipality, Matanuska-Susitna | 27 hr |
| Feb 13, 5:13 PM AKST | Winter Weather Advisory | AFG | North Slope | 4 hr |
| Feb 14, 12:25 PM AKST | Winter Weather Advisory | AFG | Kusilvak Census Area, Nome Census Area | 15 hr |
| Feb 14, 2:36 PM AKST | Winter Weather Advisory | AFC | Bethel Census Area | 13 hr |
| Feb 15, 11:12 AM AKST | Winter Weather Advisory | AFC | Dillingham Census Area | 37 hr |
| Feb 16, 1:38 AM AKST | Winter Weather Advisory | AFG | Kusilvak Census Area, Northwest Arctic, Yukon-Koyukuk Census Area | 61 hr |
| Feb 16, 12:58 PM AKST | Winter Weather Advisory | AFG | North Slope | 50 hr |
| Feb 17, 1:38 AM AKST | Winter Weather Advisory | AFG | Denali, Fairbanks North Star | 23 hr |
| Feb 17, 3:08 AM AKST | Winter Weather Advisory | AFC | Bethel Census Area | 24 hr |
| Feb 18, 2:45 PM AKST | Winter Weather Advisory | AJK | Hoonah-Angoon Census Area, Juneau City and, Ketchikan Gateway, Petersburg, Prince of Wales-Hyder Census Area, City and Borough of Wrangell | 42 hr |
| Feb 21, 10:27 AM AKST | Winter Weather Advisory | AFG | Southeast Fairbanks Census Area, Yukon-Koyukuk Census Area | 3 days |
| Feb 21, 11:21 AM AKST | Winter Weather Advisory | AFG | Nome Census Area, Northwest Arctic, Yukon-Koyukuk Census Area | 3 days |
| Feb 22, 3:45 AM AKST | Winter Weather Advisory | AFC | Bethel Census Area, Bristol Bay, Lake and Peninsula | 50 hr |
| Feb 22, 1:47 PM AKST | Winter Weather Advisory | AFC | Copper River Census Area | 50 hr |
| Feb 23, 4:19 AM AKST | Winter Weather Advisory | AJK | Hoonah-Angoon Census Area, Juneau City and, Petersburg | 3 days |
| Feb 24, 12:42 PM AKST | Winter Weather Advisory | AJK | Hoonah-Angoon Census Area, Ketchikan Gateway, Prince of Wales-Hyder Census Area, Sitka City and, Skagway Municipality | 71 hr |
| Feb 25, 2:51 PM AKST | Winter Weather Advisory | AFC | Aleutians West Census Area | 48 hr |
| Feb 27, 3:19 PM AKST | Winter Weather Advisory | AJK | Hoonah-Angoon Census Area, Prince of Wales-Hyder Census Area, Sitka City and | 30 hr |
| Feb 27, 8:02 PM AKST | Winter Weather Advisory | AFG | North Slope | 7 hr |
| Feb 28, 2:41 AM AKST | Winter Weather Advisory | AFG | North Slope | 14 hr |
| Feb 28, 1:51 PM AKST | Winter Weather Advisory | AJK | Prince of Wales-Hyder Census Area, Sitka City and, City and Borough of Wrangell | 43 hr |
| Feb 28, 8:23 PM AKST | Winter Weather Advisory | AFG | North Slope | 8 hr |
| Mar 1, 10:41 PM AKST | Winter Weather Advisory | AFG | Nome Census Area | 18 hr |
| Mar 2, 1:23 PM AKST | Winter Weather Advisory | AFG | North Slope | 38 hr |
| Mar 2, 1:35 PM AKST | Winter Weather Advisory | AJK | Petersburg, Prince of Wales-Hyder Census Area, Sitka City and, Skagway Municipality, Yakutat City and | 52 hr |
| Mar 4, 2:31 PM AKST | Winter Weather Advisory | AFG | Denali, Fairbanks North Star, Southeast Fairbanks Census Area, Yukon-Koyukuk Census Area | 69 hr |
| Mar 4, 9:26 PM AKST | Winter Weather Advisory | AFC | Anchorage Municipality, Chugach Census Area, Copper River Census Area, Kenai Peninsula, Matanuska-Susitna | 61 hr |
| Mar 5, 4:14 AM AKST | Winter Weather Advisory | AFC | Aleutians West Census Area, Dillingham Census Area, Lake and Peninsula | 31 hr |
| Mar 5, 6:32 AM AKST | Winter Weather Advisory | AJK | Haines, Hoonah-Angoon Census Area, Juneau City and | 14 hr |
| Mar 5, 2:48 PM AKST | Winter Weather Advisory | AFG | Nome Census Area, Northwest Arctic | 41 hr |
| Mar 5, 2:49 PM AKST | Winter Weather Advisory | AFG | North Slope | 54 hr |
| Mar 5, 3:47 PM AKST | Winter Weather Advisory | AJK | Skagway Municipality | 26 hr |
| Mar 6, 1:57 PM AKST | Winter Weather Advisory | AJK | Hoonah-Angoon Census Area, Juneau City and, Prince of Wales-Hyder Census Area, Yakutat City and | 43 hr |
| Mar 7, 10:31 AM AKST | Winter Weather Advisory | AFC | Aleutians East, Bethel Census Area, Lake and Peninsula | 25 hr |
| Mar 7, 8:53 PM AKST | Winter Weather Advisory | AFG | Kusilvak Census Area, Northwest Arctic | 63 hr |
| Mar 8, 7:39 PM AKDT | Winter Weather Advisory | AJK | Hoonah-Angoon Census Area, Juneau City and, Ketchikan Gateway, Petersburg, Prince of Wales-Hyder Census Area, Sitka City and and 1 more | 44 hr |
| Mar 9, 5:22 AM AKDT | Winter Weather Advisory | AFG | North Slope | 3 days |
| Mar 10, 10:32 AM AKDT | Winter Weather Advisory | AFC | Aleutians East, Bethel Census Area | 10 hr |
| Mar 10, 1:04 PM AKDT | Winter Weather Advisory | AFG | Nome Census Area | 19 hr |
| Mar 10, 3:43 PM AKDT | Winter Weather Advisory | AJK | Ketchikan Gateway, Prince of Wales-Hyder Census Area, Sitka City and | 26 hr |
| Mar 11, 11:21 AM AKDT | Winter Weather Advisory | AFG | Nome Census Area | 26 hr |
| Mar 12, 3:25 PM AKDT | Winter Weather Advisory | AJK | Ketchikan Gateway, Prince of Wales-Hyder Census Area, City and Borough of Wrangell | 31 hr |
| Mar 14, 5:36 AM AKDT | Winter Weather Advisory | AFG | North Slope | 16 hr |
| Mar 14, 5:47 AM AKDT | Winter Weather Advisory | AJK | Hoonah-Angoon Census Area, Ketchikan Gateway, Prince of Wales-Hyder Census Area, Sitka City and, City and Borough of Wrangell, Yakutat City and | 40 hr |
| Mar 14, 1:10 PM AKDT | Winter Weather Advisory | AFG | Nome Census Area | 38 min |
| Mar 14, 1:48 PM AKDT | Winter Weather Advisory | AFG | Nome Census Area | 12 hr |
| Mar 14, 2:01 PM AKDT | Winter Weather Advisory | AJK | Sitka City and | 39 hr |
| Mar 15, 3:23 AM AKDT | Winter Weather Advisory | AFC | Chugach Census Area | 37 hr |
| Mar 16, 4:48 AM AKDT | Winter Weather Advisory | AJK | Haines, Hoonah-Angoon Census Area, Juneau City and, Petersburg, Prince of Wales-Hyder Census Area, Sitka City and and 3 more | 35 hr |
| Mar 16, 10:47 AM AKDT | Winter Weather Advisory | AJK | Hoonah-Angoon Census Area | 2 hr |
| Mar 16, 11:09 AM AKDT | Winter Weather Advisory | AFG | North Slope | 35 hr |
| Mar 16, 11:12 AM AKDT | Winter Weather Advisory | AFG | Kusilvak Census Area, Nome Census Area, Northwest Arctic | 4 days |
| Mar 16, 3:55 PM AKDT | Winter Weather Advisory | AFG | Denali | 21 hr |
| Mar 16, 6:37 PM AKDT | Winter Weather Advisory | AJK | Skagway Municipality | 15 hr |
| Mar 17, 6:25 AM AKDT | Winter Weather Advisory | AJK | Haines, Hoonah-Angoon Census Area, Juneau City and, Petersburg, Prince of Wales-Hyder Census Area, Sitka City and and 2 more | 3 days |
| Mar 17, 1:10 PM AKDT | Winter Weather Advisory | AJK | Hoonah-Angoon Census Area | 24 hr |
| Mar 18, 12:22 PM AKDT | Winter Weather Advisory | AFC | Anchorage Municipality, Chugach Census Area, Kenai Peninsula | 40 hr |
| Mar 18, 8:49 PM AKDT | Winter Weather Advisory | AFG | North Slope | 25 hr |
| Mar 18, 9:41 PM AKDT | Winter Weather Advisory | AJK | Juneau City and | 30 hr |
| Mar 19, 12:25 PM AKDT | Winter Weather Advisory | AFG | North Slope | 42 hr |
| Mar 19, 5:29 PM AKDT | Winter Weather Advisory | AFC | Bethel Census Area | 33 hr |
| Mar 20, 1:00 PM AKDT | Winter Weather Advisory | AJK | Hoonah-Angoon Census Area, Juneau City and, Petersburg, Prince of Wales-Hyder Census Area, Sitka City and, Yakutat City and | 25 hr |
| Mar 21, 2:09 PM AKDT | Winter Weather Advisory | AJK | Ketchikan Gateway, Prince of Wales-Hyder Census Area | 10 hr |
| Mar 21, 6:13 PM AKDT | Winter Weather Advisory | AJK | Haines, Hoonah-Angoon Census Area, Juneau City and, Ketchikan Gateway, Petersburg, Prince of Wales-Hyder Census Area and 3 more | 46 hr |
| Mar 23, 12:57 PM AKDT | Winter Weather Advisory | AFG | North Slope | 55 hr |
| Mar 26, 1:21 AM AKDT | Winter Weather Advisory | AJK | Ketchikan Gateway, Prince of Wales-Hyder Census Area | 46 hr |
| Mar 27, 1:23 PM AKDT | Winter Weather Advisory | AFG | Kusilvak Census Area, Nome Census Area | 48 hr |
| Mar 27, 11:08 PM AKDT | Winter Weather Advisory | AFC | Bethel Census Area | 33 hr |
| Mar 28, 11:51 AM AKDT | Winter Weather Advisory | AFC | Kodiak Island | 49 hr |
| Mar 30, 10:14 AM AKDT | Winter Weather Advisory | AJK | Hoonah-Angoon Census Area, Juneau City and | 18 hr |
| Apr 5, 3:17 PM AKDT | Winter Weather Advisory | AFC | Bethel Census Area, Dillingham Census Area | 43 hr |
| Apr 9, 7:16 PM AKDT | Winter Weather Advisory | AFG | Nome Census Area | 34 hr |
| Apr 10, 5:42 AM AKDT | Winter Weather Advisory | AFG | North Slope | 24 hr |
| Apr 11, 3:14 PM AKDT | Winter Weather Advisory | AFG | Denali, Southeast Fairbanks Census Area, Yukon-Koyukuk Census Area | 54 hr |
| Apr 12, 3:04 PM AKDT | Winter Weather Advisory | AFG | Nome Census Area | 13 hr |
| Apr 13, 11:59 AM AKDT | Winter Weather Advisory | AFG | North Slope | 47 hr |
| Apr 15, 1:51 PM AKDT | Winter Weather Advisory | AFG | Southeast Fairbanks Census Area | 70 hr |
| Apr 17, 12:23 PM AKDT | Winter Weather Advisory | AFC | Bethel Census Area | 15 hr |
| Apr 18, 12:13 PM AKDT | Winter Weather Advisory | AFG | Denali, Fairbanks North Star, Yukon-Koyukuk Census Area | 49 hr |
| Apr 18, 6:42 PM AKDT | Winter Weather Advisory | AFG | Nome Census Area | 51 hr |
| Apr 18, 7:57 PM AKDT | Winter Weather Advisory | AFC | Copper River Census Area, Matanuska-Susitna | 33 hr |
| Apr 20, 2:26 PM AKDT | Winter Weather Advisory | AFG | Denali, Fairbanks North Star, Southeast Fairbanks Census Area, Yukon-Koyukuk Census Area | 27 hr |
| Apr 20, 2:39 PM AKDT | Winter Weather Advisory | AFC | Bethel Census Area | 43 hr |
| Apr 22, 12:16 PM AKDT | Winter Weather Advisory | AFG | Kusilvak Census Area, Nome Census Area, Northwest Arctic | 26 hr |
| Apr 22, 12:22 PM AKDT | Winter Weather Advisory | AFG | North Slope | 16 hr |
| Apr 22, 12:24 PM AKDT | Winter Weather Advisory | AFG | Yukon-Koyukuk Census Area | 16 hr |
| Apr 23, 4:07 AM AKDT | Winter Weather Advisory | AFG | North Slope | 4 hr |
| Apr 23, 2:34 PM AKDT | Winter Weather Advisory | AFG | North Slope | 7 hr |
| Apr 23, 2:43 PM AKDT | Winter Weather Advisory | AFG | Nome Census Area | 7 hr |
| Apr 28, 2:32 AM AKDT | Winter Weather Advisory | AFG | North Slope | 51 hr |
| May 1, 12:24 PM AKDT | Winter Weather Advisory | AFC | Anchorage Municipality, Kenai Peninsula | 11 hr |
| May 1, 6:53 PM AKDT | Winter Weather Advisory | AFG | North Slope | 8 hr |
| May 4, 2:25 PM AKDT | Winter Weather Advisory | AFG | North Slope | 39 hr |
| May 10, 10:30 AM AKDT | Winter Weather Advisory | AFG | North Slope | 7 hr |
| May 13, 6:25 AM AKDT | Winter Weather Advisory | AFG | North Slope | 14 hr |
| May 17, 12:38 PM AKDT | Winter Weather Advisory | AFG | Nome Census Area | 21 hr |
| May 30, 6:35 AM AKDT | Winter Weather Advisory | AFC | Matanuska-Susitna | 2 hr |
| Jun 6, 12:58 PM AKDT | Winter Weather Advisory | AFG | North Slope | 57 hr |
| Jun 28, 11:14 AM AKDT | Winter Weather Advisory | AFG | North Slope | 35 hr |
| Jun 30, 1:53 PM AKDT | Winter Weather Advisory | AFG | North Slope | 41 hr |
| Jul 25, 3:03 PM AKDT | Winter Weather Advisory | AFG | North Slope | 37 hr |
| Aug 27, 11:13 AM AKDT | Winter Weather Advisory | AFG | North Slope | 50 hr |
| Aug 30, 4:22 AM AKDT | Winter Weather Advisory | AFG | Southeast Fairbanks Census Area | 42 hr |
| Sep 29, 12:33 PM AKDT | Winter Weather Advisory | AFG | Southeast Fairbanks Census Area | 57 hr |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- North Slope Borough38
- Nome Census Area23
- Prince of Wales-Hyder Census Area18
- Hoonah-Angoon Census Area16
- Bethel Census Area15
- Sitka City and Borough14
- Northwest Arctic Borough13
- Southeast Fairbanks Census Area13
- Juneau City and Borough13
- Yukon-Koyukuk Census Area13
- Kenai Peninsula Borough12
- Ketchikan Gateway Borough11
- Anchorage Municipality11
- Matanuska-Susitna Borough11
- Skagway Municipality10
- Yakutat City and Borough10
- Copper River Census Area10
- Chugach Census Area9
- Kusilvak Census Area9
- Petersburg Borough8
- Lake and Peninsula Borough7
- Denali Borough7
- City and Borough of Wrangell7
- Dillingham Census Area6
- Fairbanks North Star Borough6
- Haines Borough6
- Aleutians West Census Area6
- Aleutians East Borough4
- Bristol Bay Borough3
- Kodiak Island Borough2
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
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.