Swatara Creek at Harper Tavern
8.3 mi- Level
- 0.7 ft
- Flow
- 226 cfs
Forecast peak 0.7 ft Fri 8 PM
Reading from Fri 5:15 PM · NWS gauge page
Appearance
Starts in 4 h 23 min
Issued for this forecast zone · National Weather Service State College PA
What
Sub-freezing temperatures as low as 30 possible.
Impacts
Freezing conditions could kill crops and other sensitive vegetation.
Precautionary actions
Take steps to protect tender plants and vegetation from the cold if you wish to extend the growing season.
Areas: Lebanon; Lancaster
See it on weather.gov (opens in a new tab)Observed 7:15 PM EDT at KLNS
Freeze Warning. 52°11° and clear now.
Today: low 33°1° (likely 33°1° to 43°6°), high 60°16° (likely 60°16° to 61°16°).
Now 52°11°
Clear
No precipitation expected in the next 2 hours.
From forecast models
| Hour | Conditions | Temperature | Feels like | Precipitation | Wind | Humidity | Cloud cover | UV index |
|---|---|---|---|---|---|---|---|---|
| Fri 7p | Mostly clear | 51°11° (likely 51°11° to 53°12°) | 51°11° | 0% | 1 mph2 km/h from E, gusts 5 mph8 km/h | 56% | 46% | 0 |
| Fri 8p | Clear | 48°9° (likely 48°9° to 50°10°) | 48°9° | 0% | 1 mph2 km/h from E, gusts 6 mph9 km/h | 65% | 38% | 0 |
| Fri 9p | Partly cloudy | 46°8° (likely 46°8° to 48°9°) | 46°8° | 0% | 2 mph3 km/h from E, gusts 5 mph9 km/h | 83% | 69% | 0 |
| Fri 10p | Partly cloudy | 44°7° (likely 44°7° to 47°8°) | 44°7° | 0% | 1 mph2 km/h from E, gusts 5 mph8 km/h | 86% | 56% | 0 |
| Fri 11p | Clear | 42°6° (likely 42°6° to 46°8°) | 42°6° | 0% | 1 mph2 km/h from E, gusts 5 mph8 km/h | 89% | 41% | 0 |
| Sat 12a | Clear | 41°5° (likely 41°5° to 45°7°) | 41°5° | 0% | 1 mph2 km/h from E, gusts 4 mph7 km/h | 93% | 6% | 0 |
| Sat 1a | Clear | 39°4° (likely 39°4° to 44°7°) | 39°4° | 0% | 0 mph0 km/h, gusts 4 mph7 km/h | 100% | 6% | 0 |
| Sat 2a | Clear | 38°3° (likely 38°3° to 43°6°) | 38°3° | 0% | 1 mph2 km/h from E, gusts 4 mph7 km/h | 100% | 7% | 0 |
| Sat 3a | Mostly clear | 37°3° (likely 37°3° to 42°6°) | 37°3° | 0% | 1 mph2 km/h from E, gusts 4 mph6 km/h | 100% | 17% | 0 |
| Sat 4a | Clear | 35°2° (likely 35°2° to 41°5°) | 35°2° | 0% | 1 mph2 km/h from NE, gusts 4 mph6 km/h | 100% | 19% | 0 |
| Sat 5a | Clear | 34°1° (likely 34°1° to 40°4°) | 34°1° | 0% | 2 mph3 km/h from NE, gusts 4 mph7 km/h | 100% | 8% | 0 |
| Sat 6a | Clear | 34°1° (likely 34°1° to 39°4°) | 34°1° | 0% | 1 mph2 km/h from NE, gusts 4 mph7 km/h | 100% | 23% | 0 |
| Sat 7a | Sunny | 34°1° (likely 34°1° to 39°4°) | 34°1° | 0% | 1 mph2 km/h from NE, gusts 4 mph7 km/h | 100% | 6% | 0 |
| Sat 8a | Sunny | 33°1° (likely 33°1° to 39°4°) | 33°1° | 0% | 1 mph2 km/h from NE, gusts 4 mph6 km/h | 100% | 6% | 0 |
| Sat 9a | Mostly sunny | 40°4° (likely 39°4° to 43°6°) | 40°4° | 0% | 1 mph2 km/h from NE, gusts 4 mph7 km/h | 82% | 14% | 1 |
| Sat 10a | Sunny | 47°8° (likely 47°8° to 49°9°) | 47°8° | 0% | 1 mph2 km/h from E, gusts 3 mph6 km/h | 65% | 2% | 2 |
| Sat 11a | Sunny | 54°12° (likely 53°12° to 54°12°) | 54°12° | 0% | 1 mph2 km/h from E, gusts 3 mph5 km/h | 52% | 1% | 3 |
| Sat 12p | Sunny | 56°13° (likely 55°13° to 57°14°) | 56°13° | 0% | 1 mph2 km/h from SE, gusts 5 mph8 km/h | 49% | 2% | 4 |
| Sat 1p | Sunny | 59°15° (likely 57°14° to 59°15°) | 59°15° | 0% | 2 mph3 km/h from S, gusts 5 mph8 km/h | 44% | 2% | 4 |
| Sat 2p | Sunny | 60°16° (likely 59°15° to 60°16°) | 60°16° | 0% | 2 mph3 km/h from S, gusts 6 mph10 km/h | 42% | 1% | 4 |
| Sat 3p | Sunny | 61°16° (likely 59°15° to 61°16°) | 61°16° | 0% | 1 mph2 km/h from SE, gusts 5 mph9 km/h | 39% | 0% | 3 |
| Sat 4p | Sunny | 62°17° (likely 59°15° to 62°17°) | 62°17° | 0% | 1 mph2 km/h from SE, gusts 5 mph9 km/h | 39% | 0% | 2 |
| Sat 5p | Sunny | 60°16° (likely 58°14° to 60°16°) | 60°16° | 0% | 2 mph3 km/h from SE, gusts 5 mph8 km/h | 42% | 0% | 1 |
| Sat 6p | Clear | 58°14° (likely 54°12° to 58°14°) | 58°14° | 0% | 0 mph0 km/h, gusts 4 mph6 km/h | 47% | 0% | 0 |
| Sat 7p | Clear | 54°12° (likely 50°10° to 54°12°) | 54°12° | 0% | 0 mph0 km/h, gusts 4 mph7 km/h | 52% | 0% | 0 |
| Sat 8p | Clear | 49°9° (likely 47°8° to 50°10°) | 49°9° | 0% | 0 mph0 km/h, gusts 5 mph8 km/h | 63% | 2% | 0 |
| Sat 9p | Clear | 46°8° (likely 46°8° to 48°9°) | 46°8° | 0% | 0 mph0 km/h, gusts 5 mph9 km/h | 71% | 0% | 0 |
| Sat 10p | Clear | 44°7° (likely 44°7° to 47°8°) | 44°7° | 0% | 0 mph0 km/h, gusts 5 mph8 km/h | 73% | 0% | 0 |
| Sat 11p | Clear | 42°6° (likely 42°6° to 45°7°) | 42°6° | 0% | 0 mph0 km/h, gusts 4 mph7 km/h | 79% | 0% | 0 |
| Sun 12a | Clear | 40°4° (likely 40°4° to 45°7°) | 40°4° | 0% | 0 mph0 km/h, gusts 4 mph6 km/h | 89% | 0% | 0 |
| Sun 1a | Clear | 39°4° (likely 39°4° to 43°6°) | 39°4° | 0% | 0 mph0 km/h, gusts 2 mph4 km/h | 96% | 0% | 0 |
| Sun 2a | Clear | 38°3° (likely 38°3° to 42°6°) | 38°3° | 0% | 0 mph0 km/h, gusts 2 mph4 km/h | 96% | 0% | 0 |
| Sun 3a | Clear | 38°3° (likely 38°3° to 41°5°) | 38°3° | 0% | 0 mph0 km/h, gusts 2 mph3 km/h | 96% | 0% | 0 |
| Sun 4a | Clear | 37°3° (likely 37°3° to 41°5°) | 37°3° | 0% | 0 mph0 km/h, gusts 3 mph5 km/h | 92% | 0% | 0 |
| Sun 5a | Clear | 36°2° (likely 36°2° to 40°4°) | 36°2° | 0% | 0 mph0 km/h, gusts 3 mph5 km/h | 92% | 0% | 0 |
| Sun 6a | Clear | 36°2° (likely 36°2° to 39°4°) | 36°2° | 0% | 0 mph0 km/h, gusts 3 mph5 km/h | 92% | 0% | 0 |
| Sun 7a | Sunny | 35°2° (likely 35°2° to 38°3°) | 35°2° | 0% | 0 mph0 km/h, gusts 3 mph5 km/h | 92% | 0% | 0 |
| Sun 8a | Sunny | 36°2° (likely 36°2° to 38°3°) | 36°2° | 0% | 0 mph0 km/h, gusts 2 mph4 km/h | 96% | 0% | 0 |
| Sun 9a | Sunny | 41°5° (likely 39°4° to 43°6°) | 41°5° | 0% | 0 mph0 km/h, gusts 2 mph3 km/h | 96% | 0% | 1 |
| Sun 10a | Sunny | 48°9° (likely 48°9° to 49°9°) | 48°9° | 0% | 0 mph0 km/h, gusts 2 mph4 km/h | 74% | 1% | 2 |
| Sun 11a | Sunny | 55°13° (likely 53°12° to 55°13°) | 55°13° | 0% | 0 mph0 km/h, gusts 5 mph8 km/h | 64% | 2% | 3 |
| Sun 12p | Sunny | 59°15° (likely 56°13° to 59°15°) | 59°15° | 0% | 1 mph2 km/h from SW, gusts 6 mph9 km/h | 51% | 2% | 4 |
| Sun 1p | Sunny | 61°16° (likely 58°14° to 61°16°) | 61°16° | 0% | 2 mph3 km/h from SW, gusts 7 mph12 km/h | 48% | 2% | 4 |
| Sun 2p | Sunny | 62°17° (likely 60°16° to 62°17°) | 62°17° | 0% | 3 mph5 km/h from SW, gusts 8 mph12 km/h | 48% | 2% | 4 |
| Sun 3p | Sunny | 64°18° (likely 61°16° to 64°18°) | 64°18° | 0% | 3 mph5 km/h from SW, gusts 8 mph12 km/h | 43% | 0% | 3 |
| Sun 4p | Sunny | 64°18° (likely 61°16° to 64°18°) | 64°18° | 0% | 3 mph5 km/h from SW, gusts 7 mph12 km/h | 45% | 0% | 2 |
| Sun 5p | Sunny | 62°17° (likely 60°16° to 62°17°) | 62°17° | 0% | 2 mph3 km/h from SW, gusts 6 mph9 km/h | 50% | 0% | 1 |
| Sun 6p | Clear | 59°15° (likely 53°12° to 59°15°) | 59°15° | 0% | 1 mph2 km/h from SW, gusts 3 mph5 km/h | 55% | 0% | 0 |
Evening
6 PM–midnight
Dry
Overnight
midnight–6 AM
Dry
Official NWS forecast
Tonight: Widespread frost after 1am. Mostly clear, with a low around 33. East wind around 2 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
Dry
Overnight
midnight–6 AM
Dry
Official NWS forecast
Day: Widespread frost before 9am. Sunny, with a high near 62. East wind around 2 mph.
Night: Patchy fog between 1am and 2am, then widespread frost and patchy fog. Clear, with a low around 35. Wind around 0 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
Dry
Overnight
midnight–6 AM
Dry
Official NWS forecast
Day: Widespread frost and patchy fog before 10am. Sunny, with a high near 64. West wind 0 to 3 mph.
Night: Areas of fog after 10pm. Mostly clear, with a low around 37. West wind around 1 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
Dry
Overnight
midnight–6 AM
Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Patchy fog before 9am. Sunny, with a high near 69.
Night: Mostly clear, with a low around 44.
Forecasts agreeIndependent forecasts are close; the range is narrow.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
Dry
Overnight
midnight–6 AM
Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 66.
Night: Partly cloudy, with a low around 41.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
Dry
Overnight
midnight–6 AM
Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Partly sunny, with a high near 63.
Night: Mostly cloudy, with a low around 45.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
Dry
Overnight
midnight–6 AM
Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 69.
Night: Partly cloudy, with a low around 48.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
Dry
Overnight
midnight–6 AM
Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 70.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
Morning
6 AM–noon
Dry
Afternoon
noon–6 PM
Dry
Evening
6 PM–midnight
Dry
Overnight
midnight–6 AM
Dry
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
Morning
6 AM–noon
20% chance
Afternoon
noon–6 PM
30% chance
Evening
6 PM–midnight
30% chance
Hours this far out come from computer models only.
The National Weather Service writes about seven days ahead; this day is our model forecast only.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
Dry, high 60°, low 33°.
Dry, high 62°, low 35°.
Dry, high 64°, low 37°.
Mostly dry, highs 63–70°.
Want the meteorologists’ reasoning? Read the NWS forecast discussion (CTP) (opens in a new tab)
No meaningful changes from yesterday’s forecast.
Forecast peak 0.7 ft Fri 8 PM
Reading from Fri 5:15 PM · NWS gauge page
Forecast peak 1.9 ft Sat 2 AM
Reading from Fri 5:45 PM · NWS gauge page
Forecast peak 2.3 ft Fri 8 PM
Reading from Fri 5:15 PM · NWS gauge page
Forecast peak 34.5 ft Fri 8 PM
Reading from Fri 5:30 PM · NWS gauge page
What this week’s weather means for heating, cooling, pipes and fresh air.
About 66% less heating than a typical week.
Heating degree days, base 65°F
47, 17 and 5°F are the test points heat pumps are rated at. About 21 hours are near freezing and damp, when outdoor units defrost more often.
Dry air outside (dew point 34°F).
Sat, 2:00 PM–5:00 PM
Good stretch to open the windows (air quality forecast not available for part of this window).
Today’s expected high is 2°1° colder than typical.
Pleasant Hill weather by month: normals, records, snow and freeze dates
Sunrise 7:25 AM, sunset 6:14 PM.
Mostly clear 12–6:58 AM, but the moon is 95% lit and up.
Waxing gibbous
94% lit · growing