Alert archive / California / 2010
Weather alerts in California, August 2010
202 weather alerts in August 2010, 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 August 2010. Tap one for its archive.
- Alerts
- 202
- Warnings
- 72
- Watches
- 21
- Advisories
- 67
- Busiest day
- August 26, 201043 alerts
Over time
By day
Days in UTC, the clock the archive keeps.
The alerts
Every alert, in the order issued. Times are local, Pacific Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 1, 2:33 AM PDT | Small Craft Advisory | MTR | 20 hr | |
| Aug 2, 2:30 PM PDT | Small Craft Advisory | LOX | 4 days | |
| Aug 3, 3:28 PM PDT | Fire Weather Watch | LOX | 42 hr | |
| Aug 5, 2:28 AM PDT | Small Craft Advisory | MTR | 19 hr | |
| Aug 5, 2:35 PM PDT | Small Craft Advisory | MTR | 4 days | |
| Aug 6, 3:11 PM PDT | Small Craft Advisory | LOX | 7 hr | |
| Aug 6, 6:57 PM PDT | Special Weather Statement | REV | Lassen | 33 min |
| Aug 7, 8:26 AM PDT | Small Craft Advisory | MTR | 15 hr | |
| Aug 7, 3:38 PM PDT | Special Weather Statement | REV | Sierra | 37 min |
| Aug 7, 4:21 PM PDT | Flash Flood Warning | REV | Sierra | 50 min |
| Aug 7, 4:34 PM PDT | Special Weather Statement | REV | Alpine | 26 min |
| Aug 7, 4:38 PM PDT | Special Weather Statement | REV | Plumas | 37 min |
| Aug 7, 4:48 PM PDT | Special Weather Statement | STO | Alpine | 42 min |
| Aug 7, 5:00 PM PDT | Flash Flood Warning | REV | Alpine, Mono | 109 min |
| Aug 7, 5:30 PM PDT | Special Weather Statement | REV | Alpine | 60 min |
| Aug 7, 5:31 PM PDT | Special Weather Statement | REV | Sierra | 29 min |
| Aug 7, 6:49 PM PDT | Special Weather Statement | REV | Lassen | 41 min |
| Aug 7, 7:12 PM PDT | Severe Thunderstorm Warning | REV | Lassen | 33 min |
| Aug 7, 7:45 PM PDT | Severe Thunderstorm Warning | REV | Lassen | 45 min |
| Aug 7, 10:43 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 3 hr |
| Aug 8, 5:51 AM PDT | Small Craft Advisory | MTR | 3 hr | |
| Aug 8, 8:15 AM PDT | Flash Flood Watch | REV | Alpine, El Dorado, Lassen, Modoc, Mono, Nevada and 3 more | 13 hr |
| Aug 8, 2:14 PM PDT | Areal Flood Advisory | VEF | Inyo | 2 hr |
| Aug 8, 2:33 PM PDT | Special Weather Statement | REV | Sierra | 57 min |
| Aug 8, 2:52 PM PDT | Special Weather Statement | HNX | Mariposa | 53 min |
| Aug 8, 3:13 PM PDT | Special Weather Statement | REV | Alpine, Plumas | 107 min |
| Aug 8, 3:34 PM PDT | Severe Thunderstorm Warning | REV | Alpine, El Dorado | 41 min |
| Aug 8, 3:37 PM PDT | Severe Thunderstorm Warning | REV | Lassen, Plumas | 38 min |
| Aug 8, 3:56 PM PDT | Flash Flood Warning | REV | Alpine, El Dorado | 3 hr |
| Aug 8, 4:27 PM PDT | Special Weather Statement | HNX | 93 min | |
| Aug 8, 6:23 PM PDT | Special Weather Statement | HNX | Mariposa | 52 min |
| Aug 8, 6:37 PM PDT | Special Weather Statement | REV | Sierra | 38 min |
| Aug 9, 8:33 AM PDT | Small Craft Advisory | MTR | 23 hr | |
| Aug 10, 9:11 AM PDT | Small Craft Advisory | MTR | 38 hr | |
| Aug 11, 3:03 AM PDT | Small Craft Advisory | EKA | 48 hr | |
| Aug 11, 9:40 AM PDT | Lake Wind Advisory | REV | Alpine, El Dorado, Nevada, Placer | 8 hr |
| Aug 11, 9:07 PM PDT | Small Craft Advisory | LOX | 5 days | |
| Aug 12, 8:29 AM PDT | Small Craft Advisory | MTR | 6 hr | |
| Aug 12, 4:28 PM PDT | Small Craft Advisory | MTR | 9 hr | |
| Aug 13, 3:26 AM PDT | Small Craft Advisory | MTR | 23 hr | |
| Aug 13, 2:19 PM PDT | Small Craft Advisory | MTR | 34 hr | |
| Aug 13, 2:47 PM PDT | Excessive Heat Watch | PSR | 25 hr | |
| Aug 15, 2:20 AM PDT | Small Craft Advisory | MTR | 19 hr | |
| Aug 15, 2:10 PM PDT | Fire Weather Watch | EKA | 25 hr | |
| Aug 15, 2:56 PM PDT | Special Weather Statement | REV | Lassen | 34 min |
| Aug 15, 3:12 PM PDT | Fire Weather Watch | REV | El Dorado, Lassen, Modoc, Nevada, Placer, Plumas and 1 more | 39 hr |
| Aug 16, 2:04 AM PDT | Small Craft Advisory | MTR | 19 hr | |
| Aug 16, 3:41 AM PDT | Fire Weather Watch | MFR | Siskiyou | 11 hr |
| Aug 16, 9:36 AM PDT | Red Flag Warning | REV | El Dorado, Lassen, Modoc, Nevada, Placer, Plumas and 1 more | 39 hr |
| Aug 16, 2:11 PM PDT | Fire Weather Watch | STO | 12 hr | |
| Aug 16, 2:37 PM PDT | Flash Flood Warning | SGX | Riverside, San Diego | 66 min |
| Aug 16, 2:46 PM PDT | Red Flag Warning | EKA | 30 hr | |
| Aug 16, 2:55 PM PDT | Special Weather Statement | SGX | 50 min | |
| Aug 16, 2:57 PM PDT | Lake Wind Advisory | REV | Alpine, El Dorado, Lassen, Nevada, Placer, Plumas and 1 more | 34 hr |
| Aug 16, 2:58 PM PDT | Special Weather Statement | SGX | 47 min | |
| Aug 16, 3:02 PM PDT | Red Flag Warning | MFR | Modoc, Siskiyou | 30 hr |
| Aug 16, 4:01 PM PDT | Special Weather Statement | SGX | 59 min | |
| Aug 16, 4:37 PM PDT | Special Weather Statement | SGX | San Diego | 53 min |
| Aug 16, 4:55 PM PDT | Severe Thunderstorm Warning | SGX | San Diego | 35 min |
| Aug 16, 9:18 PM PDT | Small Craft Advisory | MTR | 6 hr | |
| Aug 17, 2:10 AM PDT | Red Flag Warning | STO | 18 hr | |
| Aug 17, 3:31 AM PDT | Small Craft Advisory | MTR | 19 hr | |
| Aug 17, 10:29 AM PDT | Red Flag Warning | REV | 35 hr | |
| Aug 17, 3:09 PM PDT | Mesoscale Discussion | SPC | Imperial | 96 min |
| Aug 17, 4:10 PM PDT | Flash Flood Warning | SGX | San Bernardino | 65 min |
| Aug 17, 4:56 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 109 min |
| Aug 17, 8:57 PM PDT | Small Craft Advisory | LOX | 6 hr | |
| Aug 17, 8:59 PM PDT | Areal Flood Advisory | VEF | Inyo, San Bernardino | 62 min |
| Aug 18, 2:12 AM PDT | Small Craft Advisory | MTR | 24 hr | |
| Aug 18, 3:32 AM PDT | Lake Wind Advisory | REV | Alpine, El Dorado, Mono, Nevada, Placer | 15 hr |
| Aug 18, 1:44 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Aug 19, 2:44 AM PDT | Small Craft Advisory | EKA | 48 hr | |
| Aug 19, 2:47 AM PDT | Small Craft Advisory | MTR | 20 hr | |
| Aug 19, 9:08 AM PDT | Small Craft Advisory | LOX | 4 days | |
| Aug 19, 9:35 AM PDT | Fire Weather Watch | REV | El Dorado, Lassen, Modoc, Nevada, Placer, Plumas and 1 more | 22 hr |
| Aug 19, 1:22 PM PDT | Fire Weather Watch | MFR | Modoc, Siskiyou | 21 hr |
| Aug 19, 1:32 PM PDT | Fire Weather Watch | STO | 21 hr | |
| Aug 20, 2:39 AM PDT | Small Craft Advisory | MTR | 20 hr | |
| Aug 20, 7:40 AM PDT | Red Flag Warning | REV | El Dorado, Lassen, Modoc, Nevada, Placer, Plumas and 1 more | 39 hr |
| Aug 20, 8:21 AM PDT | Lake Wind Advisory | REV | Alpine, El Dorado, Lassen, Mono, Nevada, Placer and 2 more | 52 hr |
| Aug 20, 9:03 AM PDT | Dense Fog Advisory | LOX | 117 min | |
| Aug 20, 10:03 AM PDT | Red Flag Warning | STO | 34 hr | |
| Aug 20, 10:46 AM PDT | Red Flag Warning | MFR | Modoc | 34 hr |
| Aug 20, 2:32 PM PDT | Small Craft Advisory | MTR | 3 days | |
| Aug 21, 2:48 AM PDT | Small Craft Advisory | LOX | 48 hr | |
| Aug 21, 2:51 AM PDT | Small Craft Advisory | EKA | 4 days | |
| Aug 22, 3:07 AM PDT | Small Craft Advisory | MTR | 20 hr | |
| Aug 22, 3:10 AM PDT | Gale Watch | EKA | 11 hr | |
| Aug 22, 3:10 AM PDT | Hazardous Seas Watch | EKA | 11 hr | |
| Aug 22, 11:51 AM PDT | Coastal Flood Statement | LOX | Los Angeles | 27 hr |
| Aug 22, 2:31 PM PDT | Gale Warning | EKA | 36 hr | |
| Aug 22, 2:31 PM PDT | Hazardous Seas Warning | EKA | 36 hr | |
| Aug 22, 2:48 PM PDT | Excessive Heat Watch | LOX | Los Angeles | 25 hr |
| Aug 23, 2:38 AM PDT | Excessive Heat Watch | PSR | 11 hr | |
| Aug 23, 2:38 AM PDT | Excessive Heat Warning | PSR | 65 hr | |
| Aug 23, 3:13 AM PDT | Small Craft Advisory | LOX | 6 hr | |
| Aug 23, 3:45 AM PDT | Excessive Heat Watch | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 4 more | 8 hr |
| Aug 23, 11:23 AM PDT | Heat Advisory | MTR | Alameda, Contra Costa, Marin, Monterey, Napa, San Benito and 5 more | 56 hr |
| Aug 23, 2:36 PM PDT | High Surf Advisory | LOX | 55 hr | |
| Aug 23, 3:18 PM PDT | Excessive Heat Warning | LOX | Los Angeles | 53 hr |
| Aug 23, 9:12 PM PDT | Lake Wind Advisory | REV | Alpine, El Dorado, Nevada, Placer | 9 hr |
| Aug 24, 11:01 AM PDT | Fire Weather Watch | REV | El Dorado, Lassen, Modoc, Nevada, Placer, Plumas and 1 more | 52 hr |
| Aug 24, 1:17 PM PDT | High Surf Advisory | SGX | San Diego | 56 hr |
| Aug 24, 2:00 PM PDT | Fire Weather Watch | MFR | Modoc | 23 hr |
| Aug 25, 2:37 AM PDT | Gale Watch | EKA | 12 hr | |
| Aug 25, 2:37 AM PDT | Small Craft Advisory | EKA | 5 days | |
| Aug 25, 2:37 AM PDT | Hazardous Seas Watch | EKA | 12 hr | |
| Aug 25, 3:08 AM PDT | Small Craft Advisory | MTR | 16 hr | |
| Aug 25, 10:36 AM PDT | Red Flag Warning | REV | El Dorado, Lassen, Modoc, Nevada, Placer, Plumas and 1 more | 37 hr |
| Aug 25, 12:51 PM PDT | Red Flag Warning | MFR | Modoc | 33 hr |
| Aug 25, 1:26 PM PDT | Red Flag Warning | STO | 31 hr | |
| Aug 25, 1:33 PM PDT | Flash Flood Warning | SGX | Riverside, San Diego | 87 min |
| Aug 25, 1:35 PM PDT | Mesoscale Discussion | SPC | San Diego | 70 min |
| Aug 25, 1:46 PM PDT | Special Weather Statement | LOX | Los Angeles | 59 min |
| Aug 25, 2:09 PM PDT | Flash Flood Warning | LOX | Los Angeles | 111 min |
| Aug 25, 2:30 PM PDT | Gale Watch | EKA | 24 hr | |
| Aug 25, 2:30 PM PDT | Gale Warning | EKA | 60 hr | |
| Aug 25, 2:30 PM PDT | Hazardous Seas Watch | EKA | 24 hr | |
| Aug 25, 2:30 PM PDT | Hazardous Seas Warning | EKA | 60 hr | |
| Aug 25, 2:33 PM PDT | Small Craft Advisory | MTR | 5 days | |
| Aug 25, 3:13 PM PDT | Flash Flood Warning | VEF | San Bernardino | 2 hr |
| Aug 25, 3:14 PM PDT | Flash Flood Warning | VEF | San Bernardino | 61 min |
| Aug 25, 3:17 PM PDT | Special Weather Statement | LOX | Los Angeles | 58 min |
| Aug 25, 3:24 PM PDT | Flash Flood Warning | LOX | Los Angeles | 111 min |
| Aug 25, 3:38 PM PDT | Lake Wind Advisory | REV | Alpine, El Dorado, Lassen, Mono, Nevada, Placer and 2 more | 29 hr |
| Aug 25, 3:49 PM PDT | Flash Flood Warning | VEF | Inyo | 116 min |
| Aug 25, 3:53 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 59 min |
| Aug 25, 4:04 PM PDT | Special Weather Statement | HNX | Kern | 86 min |
| Aug 25, 4:12 PM PDT | Flash Flood Warning | SGX | San Bernardino | 63 min |
| Aug 25, 5:19 PM PDT | Flash Flood Warning | HNX | Kern | 107 min |
| Aug 25, 5:35 PM PDT | Special Weather Statement | HNX | 85 min | |
| Aug 25, 5:57 PM PDT | Flash Flood Warning | VEF | San Bernardino | 92 min |
| Aug 25, 6:31 PM PDT | Special Weather Statement | HNX | 2 hr | |
| Aug 25, 6:48 PM PDT | Gale Warning | MTR | 4 hr | |
| Aug 25, 6:58 PM PDT | Special Weather Statement | PSR | Riverside | 62 min |
| Aug 26, 3:02 AM PDT | Small Craft Advisory | LOX | 6 days | |
| Aug 26, 3:42 AM PDT | Excessive Heat Warning | LOX | Los Angeles | 17 hr |
| Aug 26, 3:42 AM PDT | Dense Fog Advisory | LOX | 5 hr | |
| Aug 26, 10:15 AM PDT | Red Flag Warning | REV | El Dorado, Nevada, Placer, Sierra | 53 hr |
| Aug 26, 10:53 AM PDT | Flash Flood Warning | SGX | Riverside, San Bernardino | 37 min |
| Aug 26, 11:29 AM PDT | Flash Flood Warning | SGX | Riverside, San Bernardino | 3 hr |
| Aug 26, 12:36 PM PDT | Flash Flood Warning | SGX | Riverside, San Diego | 94 min |
| Aug 26, 12:44 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 3 hr |
| Aug 26, 12:49 PM PDT | Areal Flood Advisory | VEF | Inyo | 2 hr |
| Aug 26, 12:59 PM PDT | Flash Flood Warning | SGX | San Bernardino | 78 min |
| Aug 26, 1:01 PM PDT | Severe Thunderstorm Warning | SGX | San Diego | 44 min |
| Aug 26, 1:20 PM PDT | Special Weather Statement | HNX | Kern | 70 min |
| Aug 26, 1:29 PM PDT | Flash Flood Warning | HNX | Kern | 107 min |
| Aug 26, 1:32 PM PDT | Flash Flood Warning | VEF | San Bernardino | 54 min |
| Aug 26, 1:42 PM PDT | Special Weather Statement | LOX | 63 min | |
| Aug 26, 2:17 PM PDT | Special Weather Statement | HNX | 58 min | |
| Aug 26, 2:18 PM PDT | Flash Flood Warning | VEF | Inyo | 117 min |
| Aug 26, 2:24 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Aug 26, 2:28 PM PDT | Special Weather Statement | REV | Mono | 32 min |
| Aug 26, 2:29 PM PDT | Special Weather Statement | HNX | 61 min | |
| Aug 26, 2:33 PM PDT | Severe Thunderstorm Warning | LOX | Los Angeles | 57 min |
| Aug 26, 2:34 PM PDT | Flash Flood Warning | VEF | Inyo | 116 min |
| Aug 26, 2:36 PM PDT | Severe Thunderstorm Warning | SGX | Riverside | 54 min |
| Aug 26, 2:38 PM PDT | Areal Flood Advisory | PSR | Riverside, San Bernardino | 112 min |
| Aug 26, 2:42 PM PDT | Flash Flood Warning | VEF | San Bernardino | 90 min |
| Aug 26, 2:47 PM PDT | Severe Thunderstorm Warning | HNX | Kern | 43 min |
| Aug 26, 2:52 PM PDT | Flash Flood Warning | VEF | Inyo | 113 min |
| Aug 26, 2:55 PM PDT | Special Weather Statement | SGX | 65 min | |
| Aug 26, 3:07 PM PDT | Flash Flood Warning | SGX | Riverside | 58 min |
| Aug 26, 3:21 PM PDT | Flash Flood Warning | HNX | Kern | 71 min |
| Aug 26, 3:27 PM PDT | Special Weather Statement | REV | Mono | 48 min |
| Aug 26, 3:30 PM PDT | Special Weather Statement | SGX | 60 min | |
| Aug 26, 3:32 PM PDT | Severe Thunderstorm Warning | SGX | Riverside | 22 min |
| Aug 26, 3:33 PM PDT | Flash Flood Warning | VEF | San Bernardino | 117 min |
| Aug 26, 3:49 PM PDT | Areal Flood Advisory | REV | Mono | 71 min |
| Aug 26, 3:51 PM PDT | Severe Thunderstorm Warning | SGX | San Bernardino | 54 min |
| Aug 26, 3:56 PM PDT | Flash Flood Warning | SGX | San Bernardino | 2 hr |
| Aug 26, 5:04 PM PDT | Special Weather Statement | LOX | 56 min | |
| Aug 26, 5:11 PM PDT | Flash Flood Warning | VEF | San Bernardino | 2 hr |
| Aug 26, 5:29 PM PDT | Flash Flood Warning | VEF | San Bernardino | 3 hr |
| Aug 26, 5:43 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 2 hr |
| Aug 26, 6:46 PM PDT | Special Weather Statement | SGX | San Diego | 59 min |
| Aug 26, 7:32 PM PDT | Severe Thunderstorm Warning | PSR | Imperial | 58 min |
| Aug 26, 7:47 PM PDT | Dust Storm Warning | PSR | 68 min | |
| Aug 26, 8:08 PM PDT | Flash Flood Warning | VEF | San Bernardino | 82 min |
| Aug 26, 8:13 PM PDT | Areal Flood Advisory | PSR | Imperial | 107 min |
| Aug 26, 9:01 PM PDT | Lake Wind Advisory | REV | Alpine, El Dorado, Mono, Nevada, Placer | 50 hr |
| Aug 26, 9:39 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 3 hr |
| Aug 26, 9:45 PM PDT | Special Weather Statement | PSR | Imperial | 90 min |
| Aug 27, 2:48 AM PDT | Small Craft Advisory | MTR | 23 hr | |
| Aug 27, 10:05 AM PDT | Red Flag Warning | VEF | San Bernardino | 35 hr |
| Aug 27, 3:16 PM PDT | Wind Advisory | VEF | Inyo, San Bernardino | 30 hr |
| Aug 27, 3:18 PM PDT | Special Weather Statement | PSR | Imperial | 72 min |
| Aug 27, 3:35 PM PDT | Special Weather Statement | PSR | Imperial | 55 min |
| Aug 27, 3:54 PM PDT | Special Weather Statement | PSR | Imperial | 51 min |
| Aug 27, 4:02 PM PDT | Severe Thunderstorm Warning | PSR | Imperial | 59 min |
| Aug 27, 4:34 PM PDT | Severe Thunderstorm Warning | PSR | Imperial | 56 min |
| Aug 27, 7:20 PM PDT | Areal Flood Advisory | VEF | San Bernardino | 115 min |
| Aug 27, 7:54 PM PDT | Flash Flood Warning | VEF | San Bernardino | 111 min |
| Aug 27, 8:38 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 52 min |
| Aug 27, 9:32 PM PDT | Severe Thunderstorm Warning | VEF | San Bernardino | 43 min |
| Aug 28, 4:01 AM PDT | Wind Advisory | LOX | 23 hr | |
| Aug 28, 9:09 AM PDT | Wind Advisory | HNX | 12 hr | |
| Aug 29, 8:30 PM PDT | Wind Advisory | LOX | 7 hr | |
| Aug 30, 2:31 AM PDT | Small Craft Advisory | MTR | 59 hr | |
| Aug 30, 2:24 PM PDT | Small Craft Advisory | MTR | 60 hr | |
| Aug 30, 2:49 PM PDT | Small Craft Advisory | EKA | 72 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 | 16 |
| Mesoscale Discussion | 2 |
| Special Weather Statement | 39 |
| Flooding | |
| Flash Flood Warning | 34 |
| Flash Flood Watch | 1 |
| Areal Flood Advisory | 13 |
| Heat | |
| Excessive Heat Warning | 3 |
| Excessive Heat Watch | 4 |
| Heat Advisory | 1 |
| Wind and dust | |
| Dust Storm Warning | 1 |
| Lake Wind Advisory | 7 |
| Wind Advisory | 4 |
| Fire | |
| Red Flag Warning | 13 |
| Fire Weather Watch | 10 |
| Fog and smoke | |
| Dense Fog Advisory | 2 |
| Coast and beach | |
| High Surf Advisory | 2 |
| Coastal Flood Statement | 1 |
| Marine | |
| Gale Warning | 3 |
| Hazardous Seas Warning | 2 |
| Gale Watch | 3 |
| Hazardous Seas Watch | 3 |
| Small Craft Advisory | 38 |
By county
Every county with at least one alert. A county page lists each alert that covered it.
- San Bernardino County32
- El Dorado County17
- Lassen County16
- Sierra County16
- Alpine County15
- Nevada County15
- Placer County15
- Plumas County13
- Modoc County12
- Riverside County10
- Mono County9
- San Diego County9
- Imperial County9
- Los Angeles County9
- Inyo County8
- Kern County6
- Siskiyou County3
- Mariposa County2
- Alameda County2
- Contra Costa County2
- Marin County2
- Monterey County2
- Napa County2
- San Benito County2
- San Mateo County2
- Santa Clara County2
- Santa Cruz County2
- Sonoma County2
- City and County of San Francisco1
Nearby
Alerts in force nowTornadoes on recordThe radar archive20092011
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.