SPRING / SUMMER SEASON

ADVISORIES
URBAN & SMALL STREAM FLOOD ADVISORY / WARNING
An Urban and Small Streams Flood Advisories / Warnings are issued when flooding of small streams, streets, and low-lying areas, such as railroad underpasses and urban storm drains, is occurring.
WATCHES
FLOOD WATCH
A Flood Watch will be issued for situations related to widespread general flooding.
FLASH FLOOD WATCH
A Flash Flood Watch will be issued for serious situations in which life and/or property are in danger. Flash Flood watch covers flash flooding, widespread urban and small stream, and headwater flood events.
SEVERE THUNDERSTORM WATCH
A Severe Thunderstorm Watch will be issued when conditions are favorable for development of severe thunderstorms. While not anticipated, tornadoes may occur in the watch area. The Storms Prediction Center (SPC) is the sole agency responsible for issuing a watch. A watch covers several thousands of square miles and generally lasts from two to six hours. Keep an eye on the sky for changing conditions and make preparations in case a weather warning is issued.
TORNADO WATCH
Conditions are right for tornado development, but none have been sighted. A "watch" is usually issued for a six-hour period of time. No special action is required, but monitor for changing weather conditions. EVERYONE should be especially alert, and monitor for weather updates.
WARNINGS
FLOOD WARNING
A Flood Warning will be issued when inundation of a normally dry area near a stream or other watercourse is expected, OR unusually severe ponding of water expected.
RIVER FLOOD WARNING
River Flood Warnings are initiated when a river at a gauge site is expected to, or has, exceeded flood stage.
FLASH FLOOD WARNING
A Flash Flood Warning will be issued in response to a few hours of locally heavy rainfall, a dam or levee failure, or water released from an ice jam rapidly flooding nearby land.
SEVERE THUNDERSTORM WARNING
When a Severe Thunderstorm Warning is issued, tornadoes and/or severe thunderstorms are occurring and have been spotted or detected by radar. The National Weather Service (NWS) defines a severe thunderstorm as having winds 50 kts (58 mph) or hail greater than ?" in diameter (about dime-sized). (A storm that spawns a tornado is obviously also considered severe.) There is imminent danger for people in the area warned. Issued by a local NWS office, the size of the warning area is generally the size of one or two counties and usually lasts less than an hour. Stay away from windows, doors and outside walls. Put as many walls between you and the tornado as possible on the lowest floor of your building. If you do not have a basement, seek shelter in an interior bathroom or closet. Get under something sturdy. Protect your head. Stay away from mobile homes. Get out of your vehicle. If there is no safe shelter, lie flat in the nearest ditch or ravine with your hands shielding your head.
TORNADO WARNING
SKYWARN spotters, Police, Fire, other trained Wx observers &/or Doppler radar have indicated a tornado or funnel cloud - take shelter immediately!  Monitor the news &/or local Amateur Radio nets for status reports and an all-clear message.