Johnson County, IA Weather Alerts
Every National Weather Service alert issued for Johnson County, Iowa, pushed to your phone within moments — county code IAC103, forecast zone IAZ064. Free with StormCast.
Download on Google PlayHow the NWS identifies Johnson County
These are the identifiers the National Weather Service uses when it issues a warning here. StormCast watches IAC103 directly rather than matching on place names, which is why an alert arrives whether you are in Coralville or anywhere else in the county.
NWS County Code
IAC103
Forecast Zone
IAZ064
Forecast Office
Davenport (DVN)
Radar Station
KDVN
Towns covered in Johnson County
An NWS alert for Johnson County applies to all 10 of these communities. You do not need a separate alert for each one.
River gauges in and around Johnson County
StormCast tracks 8 gauges near Johnson 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 Johnson 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 →Johnson County weather alert questions
Which NWS forecast zone is Johnson County in?
Johnson County, Iowa is NWS county code IAC103 and forecast zone IAZ064. Alerts for it are issued by the Davenport (DVN) Weather Forecast Office, and the nearest NEXRAD radar is KDVN.
Which towns in Johnson County are covered?
All of them. NWS alerts are issued at the county and zone level, so a warning for Johnson County covers every community inside it, including Coralville, Hills, Iowa City, Lone Tree, North Liberty, Oakdale, Oxford, Solon, Swisher and Tiffin.
Are there river gauges in Johnson County?
Yes — StormCast monitors 8 river gauges in and around Johnson County, including Clear Creek (IA) near Coralville, Muddy Creek (IA) at Coralville, Iowa River at Iowa City. 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 Johnson County delivered?
StormCast polls the NWS alert feed every 30 seconds. When a warning is issued for IAC103, the push notification goes out within moments — even with your screen off.