Alert archive / Illinois / McHenry County / 2011
Weather alerts in McHenry County, Illinois, May 2011
37 weather alerts in May 2011, from the National Weather Service and the Storm Prediction Center. An alert counts here when it covered this county.
- Alerts
- 37
- Warnings
- 15
- Watches
- 4
- Advisories
- 8
- Busiest day
- May 11, 201112 alerts
Over time
By day
Days in UTC, the clock the archive keeps.
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 |
|---|---|---|---|
| May 2, 4:02 PM CDT | Frost Advisory | LOT | 15 hr |
| May 3, 4:02 PM CDT | Frost Advisory | LOT | 16 hr |
| May 11, 12:55 PM CDT | Mesoscale Discussion | SPC | 65 min |
| May 11, 1:23 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 11, 3:19 PM CDT | Severe Thunderstorm Warning | LOT | 56 min |
| May 11, 3:38 PM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 11, 4:04 PM CDT | Areal Flood Advisory | LOT | 65 min |
| May 11, 4:06 PM CDT | Severe Thunderstorm Warning | LOT | 54 min |
| May 11, 4:36 PM CDT | Areal Flood Advisory | LOT | 32 min |
| May 11, 4:51 PM CDT | Severe Thunderstorm Warning | LOT | 54 min |
| May 11, 5:02 PM CDT | Flash Flood Warning | LOT | 4 hr |
| May 11, 5:11 PM CDT | Severe Thunderstorm Warning | LOT | 49 min |
| May 11, 5:38 PM CDT | Severe Thunderstorm Warning | LOT | 33 min |
| May 11, 5:56 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
| May 12, 4:58 PM CDT | Tornado Warning | LOT | 32 min |
| May 12, 5:25 PM CDT | Tornado Warning | LOT | 20 min |
| May 13, 12:35 PM CDT | Severe Thunderstorm Warning | LOT | 55 min |
| May 13, 1:02 PM CDT | Areal Flood Advisory | LOT | 3 hr |
| May 13, 1:33 PM CDT | Flash Flood Warning | LOT | 6 hr |
| May 16, 3:11 PM CDT | Frost Advisory | LOT | 16 hr |
| May 22, 4:41 AM CDT | Mesoscale Discussion | SPC | 2 hr |
| May 22, 1:49 PM CDT | Mesoscale Discussion | SPC | 56 min |
| May 22, 2:04 PM CDT | Tornado Watch | SPC | 9 hr |
| May 22, 5:47 PM CDT | Mesoscale Discussion | SPC | 88 min |
| May 22, 6:54 PM CDT | Tornado Warning | LOT | 51 min |
| May 22, 7:22 PM CDT | Severe Thunderstorm Warning | LOT | 53 min |
| May 22, 8:15 PM CDT | Severe Thunderstorm Warning | LOT | 60 min |
| May 22, 8:17 PM CDT | Severe Thunderstorm Warning | LOT | 58 min |
| May 22, 9:35 PM CDT | Mesoscale Discussion | SPC | 55 min |
| May 22, 10:24 PM CDT | Special Weather Statement | LOT | 66 min |
| May 25, 7:49 AM CDT | Special Weather Statement | LOT | 41 min |
| May 29, 2:10 AM CDT | Dense Fog Advisory | LOT | 7 hr |
| May 29, 8:39 AM CDT | Mesoscale Discussion | SPC | 66 min |
| May 29, 8:53 AM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
| May 29, 10:34 AM CDT | Areal Flood Advisory | LOT | 6 hr |
| May 29, 12:38 PM CDT | Flash Flood Warning | LOT | 5 hr |
| May 31, 12:59 PM CDT | Mesoscale Discussion | SPC | 3 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 | 9 |
| Tornado Warning | 3 |
| Severe Thunderstorm Watch | 3 |
| Tornado Watch | 1 |
| Mesoscale Discussion | 8 |
| Special Weather Statement | 2 |
| Flooding | |
| Flash Flood Warning | 3 |
| Areal Flood Advisory | 4 |
| Cold | |
| Frost Advisory | 3 |
| Fog and smoke | |
| Dense Fog Advisory | 1 |
Nearby
Alerts in force nowTornadoes on recordForecastThe radar archive20102012
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.