National Weather Service United States Department of Commerce

 

Hot Temperatures and/or High Heat Index values

heat index chartheat stress/illness descriptions

Heat Safety Information
The State College NWS Office will issue Advisories and Warnings under the header "PHLNPWCTP (WWUS71 KCTP)" for the following:

Extreme Heat Warning:

  Heat Index values will attain or exceed 105°F.

Extreme Heat Watch:

  Possibility that Extreme Heat Warning Criteria may be met at longer ranges (12 to 48 hrs out).

mapMap of Extreme Heat Warning Criteria

Heat Advisory:

  Heat Index will be equal to or greater than 100°F, but less than 105°F.

heat advisory mapMap of Heat Advisory Threshold

  • For an outlook beyond 3-4 days, see the extended heat index guidance we get from the NWS's Weather Prediction Center (WPC):  Maximum Heat Index Outlooks 

 

 

 Cold Temperatures and/or Wind Chill values

wind chill chart
Cold Weather Safety Information
The State College NWS Office will issue Advisories and Warnings under the header "PHLNPWCTP (WWUS71 KCTP)" for the following:
Either wind chill or temperatures can meet these criteria (i.e. if there is light/no wind, temperatures alone can trigger these products)

Extreme Cold Warning 

  Values of -20 F or colder along and south of I-80, and -25 F or colder for areas north of I-80

map

Cold Weather Advisory

  Values of -10 F or colder along and south of I-80, and -15 F or colder for areas north of I-80

map