Alert archive / Arkansas / Nevada County
Weather alerts in Nevada County, Arkansas, 2018
129 weather alerts in 2018, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
Nevada County and its neighbors
Each county as a circle sized by its count in 2018. Tap one for its archive.
- Alerts
- 129
- Warnings
- 21
- Watches
- 19
- Advisories
- 44
- Busiest month
- April25 alerts
- Busiest day
- December 1, 20188 alerts
Over time
By month
Warning verification
How often warnings here had a storm report inside them, and how much warning the reports had.
Nevada County, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| Tornado warnings | 0 | 0 | ||||
| Severe thunderstorm warnings | 5 | 2 | 60% | 0 | ||
| Flash flood warnings | 4 | 4 | 0% | 2 | 100% | 104 min |
Each office's whole area, 2018
| Warnings | With a report | False alarm ratio | Reports | Inside a warning | Mean lead time | |
|---|---|---|---|---|---|---|
| NWS Shreveport, LA: tornado warnings | 123 | 23 | 81% | 57 | 75% | 18 min |
| NWS Shreveport, LA: severe thunderstorm warnings | 232 | 136 | 41% | 400 | 69% | 21 min |
| NWS Shreveport, LA: flash flood warnings | 45 | 38 | 16% | 125 | 78% | 103 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, Central Time. Each opens its own page with the text, the map, the radar and the sounding.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jan 1, 4:31 AM CST | Hard Freeze Warning | SHV | 29 hr |
| Jan 1, 4:38 AM CST | Wind Chill Advisory | SHV | 29 hr |
| Jan 2, 4:29 AM CST | Hard Freeze Warning | SHV | 30 hr |
| Jan 3, 3:19 AM CST | Hard Freeze Warning | SHV | 31 hr |
| Jan 11, 4:42 AM CST | Lake Wind Advisory | SHV | 30 hr |
| Jan 12, 12:58 AM CST | Winter Weather Advisory | SHV | 6 hr |
| Jan 14, 2:06 PM CST | Winter Storm Watch | SHV | 14 hr |
| Jan 15, 4:18 AM CST | Winter Storm Warning | SHV | 32 hr |
| Jan 15, 10:07 PM CST | Wind Chill Advisory | SHV | 14 hr |
| Jan 16, 4:27 AM CST | Hard Freeze Warning | SHV | 30 hr |
| Jan 16, 4:59 AM CST | Wind Chill Advisory | SHV | 29 hr |
| Jan 17, 4:10 AM CST | Hard Freeze Warning | SHV | 29 hr |
| Jan 21, 6:25 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Jan 21, 9:35 PM CST | Mesoscale Discussion | SPC | 115 min |
| Jan 21, 9:59 PM CST | Tornado Watch | SPC | 6 hr |
| Jan 22, 1:16 AM CST | Mesoscale Discussion | SPC | 119 min |
| Jan 22, 3:25 AM CST | Lake Wind Advisory | SHV | 15 hr |
| Jan 30, 2:46 PM CST | Lake Wind Advisory | SHV | 27 hr |
| Feb 6, 4:06 PM CST | Severe Thunderstorm Warning | SHV | 39 min |
| Feb 14, 10:09 PM CST | Dense Fog Advisory | SHV | 6 hr |
| Feb 15, 4:29 AM CST | Lake Wind Advisory | SHV | 14 hr |
| Feb 19, 4:07 AM CST | Lake Wind Advisory | SHV | 38 hr |
| Feb 19, 2:01 PM CST | Flash Flood Watch | SHV | 5 days |
| Feb 20, 9:34 AM CST | River Flood Warning | LZK | 6 days |
| Feb 21, 11:31 AM CST | Flash Flood Warning | SHV | 3 hr |
| Feb 21, 2:38 PM CST | Flash Flood Warning | SHV | 16 hr |
| Feb 22, 6:27 PM CST | Areal Flood Advisory | SHV | 2 hr |
| Feb 23, 4:24 AM CST | Flash Flood Warning | SHV | 5 hr |
| Feb 23, 3:30 PM CST | Lake Wind Advisory | SHV | 27 hr |
| Feb 24, 10:26 AM CST | Mesoscale Discussion | SPC | 64 min |
| Feb 24, 11:01 AM CST | Tornado Watch | SPC | 8 hr |
| Feb 24, 1:39 PM CST | Mesoscale Discussion | SPC | 2 hr |
| Feb 24, 3:03 PM CST | Areal Flood Advisory | SHV | 4 hr |
| Feb 24, 7:43 PM CST | Areal Flood Advisory | SHV | 2 hr |
| Feb 26, 2:44 PM CST | Flash Flood Watch | SHV | 69 hr |
| Feb 28, 9:59 AM CST | River Flood Warning | LZK | 4 days |
| Feb 28, 1:23 PM CST | Areal Flood Advisory | SHV | 3 hr |
| Feb 28, 4:22 PM CST | Special Weather Statement | SHV | 23 min |
| Mar 1, 1:04 AM CST | Flash Flood Warning | SHV | 4 hr |
| Mar 1, 4:54 AM CST | Areal Flood Advisory | SHV | 4 hr |
| Mar 19, 4:30 AM CDT | Lake Wind Advisory | SHV | 15 hr |
| Mar 20, 3:44 AM CDT | Lake Wind Advisory | SHV | 11 hr |
| Mar 26, 2:12 PM CDT | Flash Flood Watch | SHV | 65 hr |
| Apr 2, 3:30 PM CDT | Lake Wind Advisory | SHV | 28 hr |
| Apr 3, 10:26 AM CDT | Severe Thunderstorm Watch | SPC | 8 hr |
| Apr 3, 4:59 PM CDT | Special Weather Statement | SHV | 31 min |
| Apr 3, 6:25 PM CDT | Special Weather Statement | SHV | 50 min |
| Apr 5, 1:25 PM CDT | Special Weather Statement | SHV | 35 min |
| Apr 5, 2:00 PM CDT | Special Weather Statement | SHV | 30 min |
| Apr 6, 10:33 AM CDT | Special Weather Statement | SHV | 27 min |
| Apr 6, 11:10 AM CDT | Special Weather Statement | SHV | 35 min |
| Apr 6, 1:49 PM CDT | Special Weather Statement | SHV | 26 min |
| Apr 6, 2:38 PM CDT | Special Weather Statement | SHV | 22 min |
| Apr 6, 3:39 PM CDT | Special Weather Statement | SHV | 21 min |
| Apr 6, 4:33 PM CDT | Severe Thunderstorm Warning | SHV | 42 min |
| Apr 7, 3:40 AM CDT | Freeze Warning | SHV | 28 hr |
| Apr 12, 3:43 AM CDT | Lake Wind Advisory | SHV | 42 hr |
| Apr 12, 11:49 PM CDT | Lake Wind Advisory | SHV | 22 hr |
| Apr 13, 12:41 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| Apr 13, 1:50 PM CDT | Tornado Watch | SPC | 8 hr |
| Apr 13, 5:53 PM CDT | Mesoscale Discussion | SPC | 97 min |
| Apr 13, 8:54 PM CDT | Mesoscale Discussion | SPC | 66 min |
| Apr 13, 9:53 PM CDT | Tornado Watch | SPC | 8 hr |
| Apr 14, 4:24 AM CDT | Lake Wind Advisory | SHV | 15 hr |
| Apr 15, 4:00 AM CDT | Lake Wind Advisory | SHV | 15 hr |
| Apr 15, 2:59 PM CDT | Freeze Warning | SHV | 18 hr |
| Apr 17, 3:23 AM CDT | Lake Wind Advisory | SHV | 23 hr |
| Apr 21, 10:17 PM CDT | Special Weather Statement | SHV | 43 min |
| May 3, 6:41 PM CDT | Special Weather Statement | SHV | 49 min |
| May 16, 11:21 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 16, 7:11 PM CDT | Special Weather Statement | SHV | 34 min |
| May 23, 4:39 PM CDT | Severe Thunderstorm Warning | SHV | 37 min |
| May 25, 5:06 PM CDT | Special Weather Statement | SHV | 39 min |
| Jun 20, 4:57 PM CDT | Special Weather Statement | SHV | 33 min |
| Jun 20, 5:30 PM CDT | Special Weather Statement | SHV | 45 min |
| Jun 22, 11:48 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
| Jun 24, 5:28 AM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
| Jun 24, 7:37 AM CDT | Mesoscale Discussion | SPC | 113 min |
| Jun 24, 4:53 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| Jun 24, 7:48 PM CDT | Mesoscale Discussion | SPC | 117 min |
| Jun 24, 8:07 PM CDT | Special Weather Statement | SHV | 38 min |
| Jun 28, 3:25 AM CDT | Heat Advisory | SHV | 16 hr |
| Jun 28, 2:07 PM CDT | Heat Advisory | SHV | 29 hr |
| Jul 10, 2:42 PM CDT | Special Weather Statement | SHV | 33 min |
| Jul 13, 3:34 AM CDT | Heat Advisory | SHV | 15 hr |
| Jul 15, 4:25 AM CDT | Heat Advisory | SHV | 15 hr |
| Jul 16, 5:52 PM CDT | Special Weather Statement | SHV | 23 min |
| Jul 18, 3:12 PM CDT | Heat Advisory | SHV | 44 hr |
| Jul 19, 3:07 PM CDT | Excessive Heat Warning | SHV | 48 hr |
| Jul 21, 3:02 PM CDT | Heat Advisory | SHV | 29 hr |
| Jul 30, 9:50 AM CDT | Mesoscale Discussion | SPC | 115 min |
| Jul 30, 10:30 AM CDT | Special Weather Statement | SHV | 45 min |
| Aug 8, 3:04 PM CDT | Special Weather Statement | SHV | 56 min |
| Aug 9, 5:30 AM CDT | Areal Flood Advisory | SHV | 3 hr |
| Aug 19, 8:22 PM CDT | Special Weather Statement | SHV | 38 min |
| Sep 21, 3:18 PM CDT | Flash Flood Watch | SHV | 48 hr |
| Sep 21, 5:04 PM CDT | Special Weather Statement | SHV | 26 min |
| Sep 26, 9:25 AM CDT | Areal Flood Advisory | SHV | 2 hr |
| Oct 9, 6:22 PM CDT | Mesoscale Discussion | SPC | 83 min |
| Oct 29, 2:50 PM CDT | Lake Wind Advisory | SHV | 28 hr |
| Oct 31, 3:02 PM CDT | Tornado Watch | SPC | 9 hr |
| Oct 31, 3:55 PM CDT | Mesoscale Discussion | SPC | 95 min |
| Oct 31, 6:14 PM CDT | Mesoscale Discussion | SPC | 61 min |
| Nov 7, 4:46 AM CST | Special Weather Statement | SHV | 29 min |
| Nov 8, 8:45 PM CST | Freeze Watch | SHV | 8 hr |
| Nov 9, 4:29 AM CST | Freeze Warning | SHV | 29 hr |
| Nov 12, 3:42 AM CST | Lake Wind Advisory | SHV | 20 hr |
| Nov 14, 4:51 AM CST | Winter Weather Advisory | SHV | 6 hr |
| Nov 24, 4:30 AM CST | Dense Fog Advisory | SHV | 5 hr |
| Nov 24, 3:49 PM CST | Lake Wind Advisory | SHV | 34 hr |
| Nov 30, 3:58 AM CST | Lake Wind Advisory | SHV | 20 hr |
| Nov 30, 3:34 PM CST | Mesoscale Discussion | SPC | 116 min |
| Nov 30, 6:17 PM CST | Mesoscale Discussion | SPC | 58 min |
| Nov 30, 6:40 PM CST | Tornado Watch | SPC | 7 hr |
| Nov 30, 9:02 PM CST | Mesoscale Discussion | SPC | 58 min |
| Nov 30, 11:20 PM CST | Mesoscale Discussion | SPC | 85 min |
| Dec 1, 12:58 AM CST | Mesoscale Discussion | SPC | 2 hr |
| Dec 1, 1:17 AM CST | Severe Thunderstorm Warning | SHV | 58 min |
| Dec 1, 1:58 AM CST | Tornado Watch | SPC | 5 hr |
| Dec 1, 4:07 AM CST | Lake Wind Advisory | SHV | 11 hr |
| Dec 6, 2:29 PM CST | Flash Flood Watch | SHV | 46 hr |
| Dec 14, 4:59 AM CST | Severe Thunderstorm Warning | SHV | 61 min |
| Dec 16, 9:36 PM CST | Dense Fog Advisory | SHV | 14 hr |
| Dec 17, 9:56 PM CST | Dense Fog Advisory | SHV | 12 hr |
| Dec 18, 10:08 AM CST | Dense Fog Advisory | SHV | 112 min |
| Dec 18, 9:24 PM CST | Dense Fog Advisory | SHV | 12 hr |
| Dec 26, 4:24 AM CST | Lake Wind Advisory | SHV | 30 hr |
| Dec 27, 12:02 AM CST | Severe Thunderstorm Watch | SPC | 5 hr |
| Dec 27, 1:39 AM CST | Mesoscale Discussion | SPC | 2 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 | 5 |
| Severe Thunderstorm Watch | 5 |
| Tornado Watch | 7 |
| Mesoscale Discussion | 21 |
| Special Weather Statement | 24 |
| Flooding | |
| Flash Flood Warning | 4 |
| River Flood Warning | 2 |
| Flash Flood Watch | 5 |
| Areal Flood Advisory | 7 |
| Winter | |
| Winter Storm Warning | 1 |
| Winter Storm Watch | 1 |
| Winter Weather Advisory | 2 |
| Heat | |
| Excessive Heat Warning | 1 |
| Heat Advisory | 6 |
| Cold | |
| Freeze Warning | 3 |
| Hard Freeze Warning | 5 |
| Freeze Watch | 1 |
| Wind Chill Advisory | 3 |
| Wind and dust | |
| Lake Wind Advisory | 20 |
| Fog and smoke | |
| Dense Fog Advisory | 6 |
The busiest days
Days with the most alerts issued, by UTC date.
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20172019
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.