Posted: July 2, 2020 at 10:59 am
As you can tell by the map above, it will be a warm and sticky 4th of July. It’s a possibility soon, or sometime this summer the National Weather Service will issue a Heat Advisory, Excessive Heat Watch, or a Excessive Heat Warning. Here’s a definition of what all those mean:
A Heat Advisory means that temperatures of at least 100°F* or Heat Index values of at least 105°F* are expected generally within the next 24 hours. Consider postponing or rescheduling any strenuous outdoor activities. If you must be outside, be sure to drink plenty of water and take frequent breaks in the shade. The young and elderly and those with medical conditions should use extra caution outdoors.
An Excessive Heat Watch means that Heat Index values are expected to reach or exceed 110°F* and not fall below 75°F* for at least a 48 hour period, beginning in the next 12 to 48 hours. Plan to suspend all major daytime outdoor activities if a warning is issued. If you do not have air conditioning, locate the nearest cooling shelter or discuss staying with nearby family or friends who have A/C.
An Excessive Heat Warning means that Heat Index values are expected to reach or exceed 110°F* and not fall below 75°F* for at least a 48 hour period, beginning in the next 24 hours. Refrain from outdoor activities of any nature during the warmest time of the day. Drink plenty of water and take frequent breaks if you must be outside. Stay indoors in an air conditioned building as much as possible. Check on elderly family members if they are living alone.
Credit: National Weather Service Des Moines