
Heavy rain from Tropical Storm Moke will begin to impact the Big Island today, risking life-threatening flooding and mudslides in windward and southeast areas. Severe thunderstorms are expected across the northern Rockies/Plains and northern Great Basin. Repeated storms and heavy rainfall may cause flash flooding from the Plains into the Lower MS Valley. Dangerous heat persists across the South. Read More >
Biggest takeaway:
Cold isn’t a problem as long as you have a shelter with power. But what if the power goes out, or you are trapped outside. Stay proactive with your response based on your plan for cold. Arctic outbreaks of cold air are typically well communicated well ahead of the event.
Warning/Trigger for Plan:
NWS Wind Chill Warning (greater threat; alerted on NOAA Weather Radio) –and-
NWS Wind Chill Advisory (some threat; not alerted on NOAA Weather Radio)
Advance Notice/Time to Activate & Accomplish Your Planned Response:
Typically a day to as many as several days.
Frequency:
2-5 Wind Chill Advisories is average, but this can vary widely from winter to winter.
0-2 Wind Chill Warnings is average for exceptional, very dangerous cold.
How Accurate Warnings?
Arctic outbreaks of cold air are typically well forecast and warned for.