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Gregory County weather alerts
No active National Weather Service alerts for Gregory County, South Dakota right now. The most recent was a Frost Advisory that ended Oct 17, 9:00 AM.
24 in the last 30 days 34 in 12 months (since Aug 30) most common: Dense Fog Advisory Get alerts on your phone →
Active alerts for Gregory County
Refreshed every few minutes; times in CDT.
All clear in Gregory County
No warnings, watches or advisories are in effect. See what is active across the country, or check a neighbouring county below.
Get Gregory County alerts on your phone before you think to look them up
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Where
Gregory County on the map
Alert polygons are NWS's own. Forecast Bar's radar shows the same warnings over live precipitation, with future radar and lightning. See the radar.
Last 30 days
Recent alerts for Gregory County
| Alert | Issued | Ended | Issued by |
|---|---|---|---|
| Frost Advisory | Oct 17, 8:48 AM | Oct 17, 9:00 AM | Sioux Falls SD |
| Frost Advisory | Oct 17, 2:49 AM | Oct 17, 9:00 AM | Sioux Falls SD |
| Frost Advisory | Oct 16, 9:00 PM | Oct 17, 9:00 AM | Sioux Falls SD |
| Frost Advisory | Oct 16, 10:56 AM | Oct 17, 9:00 AM | Sioux Falls SD |
| Wind Advisory | Oct 16, 3:47 AM | Oct 16, 4:00 AM | Sioux Falls SD |
| Wind Advisory | Oct 16, 1:26 AM | Oct 16, 4:00 AM | Sioux Falls SD |
| Wind Advisory | Oct 16, 12:02 AM | Oct 16, 4:00 AM | Sioux Falls SD |
| Wind Advisory | Oct 15, 7:47 PM | Oct 16, 4:00 AM | Sioux Falls SD |
| Wind Advisory | Oct 15, 7:26 PM | Oct 16, 4:00 AM | Sioux Falls SD |
| Wind Advisory | Oct 15, 1:29 PM | Oct 16, 4:00 AM | Sioux Falls SD |
| Wind Advisory | Oct 15, 11:03 AM | Oct 16, 4:00 AM | Sioux Falls SD |
| Wind Advisory | Oct 15, 1:29 AM | Oct 16, 4:00 AM | Sioux Falls SD |
| Wind Advisory | Oct 14, 9:17 PM | Oct 16, 12:00 AM | Sioux Falls SD |
| Dense Fog Advisory | Oct 12, 6:12 AM | Oct 12, 10:00 AM | Sioux Falls SD |
| Dense Fog Advisory | Sep 30, 9:56 AM | Sep 30, 10:00 AM | Sioux Falls SD |
| Dense Fog Advisory | Sep 30, 6:32 AM | Sep 30, 10:00 AM | Sioux Falls SD |
| Dense Fog Advisory | Sep 30, 3:21 AM | Sep 30, 10:00 AM | Sioux Falls SD |
| Dense Fog Advisory | Sep 30, 1:43 AM | Sep 30, 10:00 AM | Sioux Falls SD |
| Dense Fog Advisory | Sep 27, 9:53 AM | Sep 27, 11:00 AM | Sioux Falls SD |
| Dense Fog Advisory | Sep 27, 9:10 AM | Sep 27, 10:00 AM | Sioux Falls SD |
| Dense Fog Advisory | Sep 27, 5:38 AM | Sep 27, 10:00 AM | Sioux Falls SD |
| Dense Fog Advisory | Sep 27, 3:48 AM | Sep 27, 10:00 AM | Sioux Falls SD |
| Dense Fog Advisory | Sep 27, 2:11 AM | Sep 27, 10:00 AM | Sioux Falls SD |
| Dense Fog Advisory | Sep 27, 1:30 AM | Sep 27, 10:00 AM | Sioux Falls SD |
Pattern
What Gregory County gets alerted for
Every alert that named Gregory County in the last 12 months, by type. Records begin August 30, 2026, so this fills in over the year.
Plain English
What these alerts mean
A warning means the hazard is happening or about to; a watch means conditions favour it; an advisory is a lesser hazard still worth planning around.
Frost is expected on the ground. Cover sensitive plants overnight.
Sustained winds of 30 mph or more, or gusts to 45 mph, are expected. Use caution driving high-profile vehicles.
Visibility of a quarter mile or less is expected. Slow down and use low beams.
A storm with hail of 1 inch or larger, winds of 58 mph or more, or both, is occurring or imminent. Move indoors and away from windows.
Conditions are favourable for severe thunderstorms with large hail or damaging wind. Keep an eye on the sky and on warnings.
A tornado has been sighted or indicated by radar. Take shelter immediately in a basement or an interior room on the lowest floor.
Nearby
Alerts near Gregory County
Neighbouring counties in South Dakota
Questions
About Gregory County alerts
How do I get Gregory County weather alerts on my iPhone?
Install Forecast Bar, add Gregory County as a location, and turn on severe weather alerts. Every NWS warning, watch and advisory for Gregory County then arrives as a push notification at the moment of issue, with Critical Alerts available for the most dangerous warnings. Forecast Bar also runs on iPad, Apple Watch, Mac and Apple TV.
Where do these alerts come from?
From the National Weather Service alert feed (api.weather.gov). NWS issues alerts by county and by forecast zone; this page lists every product that names Gregory County. Forecast Bar checks the feed continuously and this page refreshes within a few minutes of a change.
What is the difference between a watch, a warning and an advisory?
A warning means the hazard is occurring, imminent or very likely: act now. A watch means conditions are favourable for it to develop: prepare and stay informed. An advisory covers a hazard that is less serious than a warning but can still cause real inconvenience or danger if you are not ready for it.
Can I get this data as JSON?
Yes. /weather-alerts/sd/gregory-county.json returns the active alerts, the last 30 days and the 12-month counts for Gregory County, refreshed every minute. Please cache responses and credit National Weather Service as the source.
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