A tornado warning or thunderstorm warning will be issued by the National Weather Service when severe weather has been sighted or indicated by radar.
People close to the storm should take shelter immediately and remain there until the danger has passed. If you're further away, be prepared to take cover if threatening conditions are sighted.
To learn more, call Public Safety at 319-398-7777.
It is the responsibility of all faculty and staff to be familiar with current emergency procedures and to direct/instruct all students, guests, and others of the procedures and of the suggested shelter areas.
Individuals should seek shelter in building interiors preferably on lower levels, and use areas such as hallways, or rooms without windows, and with doors that close. Avoid windows or areas with large amounts of glass, and large open areas such as atriums, gymnasiums, lobbies.
The Hazardous Weather Outlook (HWO) includes any potential weather hazard out to seven (7) days. It is used for planning purposes and includes a short description of what the weather threat is, when it is expected, and whether storm spotter activation will be needed. The HWO is issued daily around 5:00 a.m., and updated during the day as needed. It is also broadcast on NOAA Weather Radio at the top and bottom of every hour.
Get an explanation of outlook categories used by the Storm Prediction Center here.
A Severe Thunderstorm Watch is issued by the Storm Prediction Center (SPC) when there is a potential for severe thunderstorms to form or move into the area. A severe thunderstorm consists of wind gusts of 58 mph or higher, or 1" diameter size hail or larger. Severe thunderstorms occasionally do produce tornadoes with little advance warning. A Watch is typically in effect for about 6 hours and covers a region of a state.
A Flash Flood Watch is issued when the potential for flash flooding exists. Usually these are issued when abundant, heavy rainfall is expected from thunderstorms, especially if the ground is already near saturation. Flash Flood Watches are sometimes issued if there is a possibility of a dam failure as well.
A Tornado Watch is issued by the Storm Prediction Center (SPC) when there is potential for severe thunderstorms that can produce tornadoes. Thunderstorms may be more severe and the atmosphere is favorable for rotation within thunderstorms and tornado development. A Watch is typically in effect for about 6 hours and covers a region of a state.
A Severe Thunderstorm Warning is issued when a thunderstorm is or is expected to produce wind gusts of 58 mph or higher, or 1" diameter size hail or larger. In this case, either severe weather has been reported or the thunderstorm looks severe based on Doppler Radar. The warning is typically in effect for 30 to 60 minutes and usually covers a county.
A Flash Flood Warning is issued when a rapid rise in small creeks and streams is expected. Flash Flooding or mudslides are expected or occurring. The warning is typically in effect for 2 to 3 hours and covers a county.
A Tornado Warning is issued when a severe thunderstorm is or is expected to produce a tornado. In this case, either a tornado has been spotted or rotation is being detected within the thunderstorm on Doppler Radar. The warning is typically in effect for 30 to 60 minutes and usually covers a county. Tornado Warnings are issued infrequently and should be taken very seriously.