Union County, SD Weather Alerts
Every National Weather Service alert issued for Union County, South Dakota, pushed to your phone within moments — county code SDC127, forecast zone 2 zones (SDZ071, SDZ067). Free with StormCast.
Download on Google PlayHow the NWS identifies Union County
These are the identifiers the National Weather Service uses when it issues a warning here. StormCast watches SDC127 directly rather than matching on place names, which is why an alert arrives whether you are in Alcester or anywhere else in the county.
NWS County Code
SDC127
Forecast Zones
2 zones (SDZ071, SDZ067)
Forecast Office
Sioux Falls (FSD)
Radar Station
KFSD
Towns covered in Union County
An NWS alert for Union County applies to all 5 of these communities. You do not need a separate alert for each one.
River gauges in and around Union County
StormCast tracks 3 gauges near Union County. Set a flood-stage alert on any of them to get notified before the water reaches you.
Current conditions
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Alert types issued for Union County
Tornado
Tornado Warning, Tornado Watch, Tornado Emergency and Severe Thunderstorm Warning.
How tornado alerts work →Flooding
Flash Flood Warning, Flood Watch, Flood Advisory and River Flood Warning.
How flood alerts work →Winter
Winter Storm Warning, Ice Storm Warning, Blizzard Warning and Winter Weather Advisory.
Winter warnings explained →Fire Weather
Red Flag Warning and Fire Weather Watch when conditions favor rapid fire spread.
Fire weather alerts →Heat & Cold
Excessive Heat Warning, Heat Advisory, Freeze Warning and Frost Advisory.
Frost & freeze alerts →Union County weather alert questions
Which NWS forecast zone is Union County in?
Union County, South Dakota is NWS county code SDC127 and spans 2 forecast zones (SDZ071, SDZ067). Alerts for it are issued by the Sioux Falls (FSD) Weather Forecast Office, and the nearest NEXRAD radar is KFSD.
Which towns in Union County are covered?
All of them. NWS alerts are issued at the county and zone level, so a warning for Union County covers every community inside it, including Alcester, Beresford, Elk Point, Jefferson and North Sioux City.
Are there river gauges in Union County?
Yes — StormCast monitors 3 river gauges in and around Union County, including Big Sioux River near Richland, Brule Creek near Richland, Big Sioux River near Jefferson. You can set a flood-stage alert on any of them and get a push notification when the water rises.
How fast are alerts for Union County delivered?
StormCast polls the NWS alert feed every 30 seconds. When a warning is issued for SDC127, the push notification goes out within moments — even with your screen off.