National Weather Service State College, PA Weather Impact Matrix for York County Decision Support Valid: 12/28/2025 08 AM - 12/28/2025 08 PM EST

Sun 12/28 8 AM Sun 12/28 9 AM Sun 12/28 10 AM Sun 12/28 11 AM Sun 12/28 12 PM Sun 12/28 1 PM Sun 12/28 2 PM Sun 12/28 3 PM Sun 12/28 4 PM Sun 12/28 5 PM Sun 12/28 6 PM Sun 12/28 7 PM Sun 12/28 8 PM Temperature 29°F 30°F 31°F 33°F 35°F 36°F 37°F 37°F 38°F 38°F 37°F 37°F 38°F Wind Chill 29°F 30°F 31°F 29°F 29°F 31°F 30°F 32°F 33°F 34°F 32°F 32°F 33°F Wind Speed 1 mph 2 mph 2 mph 4 mph 5 mph 5 mph 6 mph 6 mph 6 mph 5 mph 5 mph 5 mph 6 mph Wind Direction SE S S S S S S S S S S S S Wind Gust 3 mph 5 mph 6 mph 10 mph 11 mph 12 mph 13 mph 14 mph 13 mph 13 mph 13 mph 14 mph 16 mph Chance of Precipitation 3% 8% 12% 9% 12% 31% 31% 35% 34% 28% 17% 19% 20% Weather None None None None None Rain Rain Rain Rain Rain Rain Rain Rain Sky Cover 79% 91% 92% 93% 93% 92% 89% 93% 92% 94% 92% 87% 77% Relative Humidity 92% 90% 88% 85% 84% 82% 82% 82% 82% 82% 85% 85% 85% Rainfall 0.0 in 0.0 in 0.0 in 0.0 in 0.0 in 0.0 in 0.0 in 0.0 in 0.0 in 0.0 in 0.0 in 0.0 in 0.0 in Snow Accumulation 0.0 in 0.0 in 0.0 in 0.0 in 0.0 in 0.0 in 0.0 in 0.0 in 0.0 in 0.0 in 0.0 in 0.0 in 0.0 in Ice Accumulation 0.0 in 0.0 in 0.0 in 0.0 in 0.0 in 0.0 in 0.0 in 0.0 in 0.0 in 0.0 in 0.0 in 0.0 in 0.0 in Issued: Sunday December 28, 2025 07:49 AM EST

Threat Level	None	Limited	Elevated	Significant	Extreme
Temperature	≥10 °F	10 to 1 °F	0 to -9 °F	-10 to -24 °F	≤-25 °F
Wind Chill	≥10 °F	10 to 1 °F	0 to -9 °F	-10 to -24 °F	≤-25 °F
Wind Speed	≤10 mph	10 to 14 mph	15 to 24 mph	25 to 34 mph	≥35 mph
Wind Gust	≤15 mph	15 to 24 mph	25 to 34 mph	35 to 44 mph	≥45 mph
Chance of Precipitation	≤15 %	15 to 24 %	25 to 54 %	55 to 74 %	≥75 %
Relative Humidity	≥15 %	15 to 21 %	20 to 31 %	30 to 41 %	≤40 %
Rainfall	≤0.1 in	0.1 to 0.24 in	0.25 to 0.49 in	0.5 to 0.99 in	≥1.0 in
Snow Accumulation	≤0.1 in	0.1 to 0.9 in	1.0 to 2.9 in	3.0 to 5.9 in	≥6.0 in
Ice Accumulation	≤0.01 in	0.01 to 0.09 in	0.1 to 0.24 in	0.25 to 0.49 in	≥0.5 in

Note -

Grey color indicates no thresholds assigned