Statement as of 3:17 AM CDT on July 20, 2017
Expires 9:00 PM EDT on July 22, 2017
... Excessive heat warning remains in effect until 8 PM CDT
* heat indices... around 105 are expected during the afternoon
and early evening hours each day.
* Impacts... prolonged exposure to the heat and humidity may lead
to heat-related illnesses if precautions are not taken.
To reduce risk during outdoor work, the occupational safety and
health administration recommends scheduling frequent rest breaks
in shaded or air conditioned environments. Anyone overcome by
heat should be moved to a cool and shaded location at once. Heat
stroke is an emergency. Call 9 1 1.
Take extra precautions if you work or spend time outside. When
possible... reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear light weight and loose fitting clothing when possible
and drink plenty of water.
An excessive heat warning means that a prolonged period of
dangerously hot temperatures will occur. The combination of hot
temperatures and high humidity will create a dangerous situation
where heat illnesses are likely. Drink plenty of fluids and stay
in an air conditioned room. Stay out of the sun and check up on
relatives and neighbors. Temperatures within vehicles can become
lethal in a few minutes. Never leave children or pets in vehicles.
Remember to beat the heat... check the backseat.
Statement as of 6:00 AM CDT on July 20, 2017
Expires 11:00 AM EDT on July 20, 2017
600 am CDT Thu Jul 20 2017
... On this date in weather history...
In 1987, severe thunderstorms invaded the northern plains
and upper Great Lakes from Minnesota to northern lower
Michigan. Parts of central Wisconsin were whipped by 80
to 90 mph winds. The town of Mosinee was smacked by an
87 mph gust. Severe thunderstorm winds capsized 26 boats
on Grand Traverse Bay where 2 women drowned. The
thunderstorms were also prolific rain producers as 7 to 9
inches swamped much of southern Minnesota. In northwest
Nebraska, Cherry County was pelted with Golf Ball sized
hail that accumulated to a 1 foot depth.
In 1996, severe thunderstorms raked Mt. Rushmore with
hail up to 2 inches in diameter and winds around 100 mph.
There were between 300 and 500 people outside when the
extremely powerful thunderstorms began. Considering the
magnitude of the event, it's surprising only 15 were