Winter weather in the City of McKinney is not very common, but the threat from freezing rain, ice, snow and cold temperatures still exists even in this area that normally experiences mild winters. Winter storms can range from moderate freezing rain and snowfall over a few hours to a blizzard with wind-driven snow that could last up to a few days. Extreme cold often accompanies winter weather and occurs whenever temperatures drop decidedly below normal. For McKinney, extreme cold can be considered temperatures below freezing (32 °F). These cooler temperatures may be a welcome change, but many people are not prepared for them.
Winter StormWatch: Winter storm conditions are possible within the next 36 to 48 hours. People in a watch area should review their winter storm plans and kits and stay informed about weather conditions
Winter Weather Advisory: Winter weather conditions are expected to cause significant inconveniences and may be hazardous. When caution is used, these situations should not be life threatening
Winter StormWarning: Life-threatening, severe weather conditions have begun or will begin within 24 hours. People in a warning area should take precautions immediately
Blizzard Warning: Sustained winds or gusts of 35 miles per hour or greater and considerable amounts of snow (falling or blowing) are expected to occur for a period of three hours or longer
Frost / Freeze Warning: Below-freezing temperatures are expected
Wind Chill: The wind chill index is the temperature your body feels when the air temperature is combined with the wind speed