Freeze Watch
Starts in 16 h 42 min
When
From late tonight through Saturday morning.
Where
Lancaster and Lebanon Counties.
Issued for this forecast zone · National Weather Service State College PA
What, impacts and precautionsHide details
What
Sub-freezing temperatures as low as 30 possible.
Impacts
Frost and freeze conditions could kill crops, other sensitive vegetation and possibly damage unprotected outdoor plumbing.
Precautionary actions
Those with agricultural interests should protect sensitive vegetation.
Areas: Lebanon; Lancaster
See it on weather.gov (opens in a new tab)

Observed 6:35 AM EDT at KMQS

Gap, PA weather

Clear and 47°8°.

Forecasts agree

Now 47°8°

Clear

Wind: 5 mph8 km/h; From the north-northeast. Gusts to 21 mph34 km/h around 10 AM
Dew point: 43°6°; Comfortable · down to 33°1° by 1 PM (dry)
UV index: 0Low; Moderate 12–3 PM · peak 3
Pressure: 30.26 inHg1025 hPa; Rising · +0.06 inHg+2.1 hPa in 3 h

No precipitation expected in the next 2 hours.

From forecast models

Next 48 hours

3°2° warmer than this time yesterday (44°7° then, 47°8° now)

Good hours for

Above 50°10° today by 10 AM
High 59°15° today at 2 PM
Below 50°10° tonight after 8 PM
Low 35°2° tonight at 5 AM

This morningUp to 54°12° by 11 AM · Clear
This afternoonNear 57°14° · Clear
TonightDown to 35°2° by 5 AM · Partly cloudy
Tomorrow morningUp to 54°12° by 11 AM · Partly cloudy
Tomorrow afternoonUp to 61°16° by 4 PM · Clear
Tomorrow nightDown to 35°2° by 5 AM · Clear

Hourly forecast, next 48 hours, in the place's local time
Hour	Conditions	Temperature	Feels like	Precipitation	Wind	Humidity	Cloud cover	UV index
Fri 7a	Sunny	43°6° (likely 43°6° to 45°7°)	43°6°	0%	2 mph3 km/h from N, gusts 9 mph15 km/h	86%	4%	0
Fri 8a	Sunny	43°6° (likely 42°6° to 45°7°)	40°4°	0%	5 mph8 km/h from N, gusts 10 mph16 km/h	82%	7%	0
Fri 9a	Sunny	44°7° (likely 44°7° to 50°10°)	40°4°	0%	7 mph11 km/h from NE, gusts 15 mph25 km/h	86%	4%	0
Fri 10a	Sunny	51°11° (likely 51°11° to 54°12°)	51°11°	0%	8 mph13 km/h from NE, gusts 21 mph34 km/h	59%	0%	1
Fri 11a	Sunny	54°12° (likely 54°12° to 56°13°)	54°12°	0%	8 mph13 km/h from NE, gusts 18 mph30 km/h	50%	0%	2
Fri 12p	Sunny	56°13° (likely 56°13° to 57°14°)	56°13°	0%	8 mph13 km/h from NE, gusts 17 mph27 km/h	45%	0%	3
Fri 1p	Sunny	58°14° (likely 58°14° to 59°15°)	58°14°	0%	7 mph11 km/h from NE, gusts 15 mph24 km/h	39%	0%	3
Fri 2p	Sunny	59°15° (likely 59°15° to 60°16°)	59°15°	0%	6 mph10 km/h from NE, gusts 13 mph21 km/h	37%	1%	3
Fri 3p	Sunny	59°15° (likely 59°15° to 60°16°)	59°15°	0%	6 mph10 km/h from NE, gusts 12 mph19 km/h	36%	0%	2
Fri 4p	Sunny	59°15° (likely 59°15° to 60°16°)	59°15°	0%	6 mph10 km/h from NE, gusts 11 mph17 km/h	34%	0%	1
Fri 5p	Sunny	58°14° (likely 58°14° to 59°15°)	58°14°	0%	5 mph8 km/h from NE, gusts 10 mph16 km/h	36%	0%	0
Fri 6p	Clear	54°12° (likely 53°12° to 55°13°)	54°12°	0%	3 mph5 km/h from NE, gusts 8 mph13 km/h	43%	3%	0
Fri 7p	Clear	51°11° (likely 49°9° to 51°11°)	51°11°	0%	2 mph3 km/h from NE, gusts 8 mph12 km/h	50%	10%	0
Fri 8p	Mostly clear	47°8° (likely 47°8° to 48°9°)	47°8°	0%	2 mph3 km/h from E, gusts 8 mph13 km/h	60%	36%	0
Fri 9p	Mostly clear	43°6° (likely 43°6° to 47°8°)	43°6°	0%	2 mph3 km/h from E, gusts 8 mph13 km/h	76%	60%	0
Fri 10p	Partly cloudy	42°6° (likely 42°6° to 46°8°)	42°6°	0%	1 mph2 km/h from E, gusts 9 mph14 km/h	79%	55%	0
Fri 11p	Mostly clear	41°5° (likely 41°5° to 45°7°)	41°5°	0%	1 mph2 km/h from E, gusts 8 mph13 km/h	82%	59%	0
Sat 12a	Mostly clear	40°4° (likely 40°4° to 44°7°)	40°4°	0%	0 mph0 km/h, gusts 8 mph12 km/h	82%	49%	0
Sat 1a	Mostly clear	38°3° (likely 38°3° to 43°6°)	38°3°	0%	0 mph0 km/h, gusts 6 mph10 km/h	89%	38%	0
Sat 2a	Clear	37°3° (likely 37°3° to 42°6°)	37°3°	0%	0 mph0 km/h, gusts 5 mph8 km/h	92%	35%	0
Sat 3a	Mostly clear	37°3° (likely 37°3° to 41°5°)	37°3°	0%	0 mph0 km/h, gusts 4 mph6 km/h	89%	24%	0
Sat 4a	Mostly clear	36°2° (likely 36°2° to 41°5°)	36°2°	0%	1 mph2 km/h from NE, gusts 3 mph4 km/h	92%	28%	0
Sat 5a	Partly cloudy	35°2° (likely 35°2° to 40°4°)	35°2°	0%	1 mph2 km/h from NE, gusts 2 mph3 km/h	92%	39%	0
Sat 6a	Clear	35°2° (likely 35°2° to 40°4°)	35°2°	0%	1 mph2 km/h from NE, gusts 2 mph3 km/h	92%	23%	0
Sat 7a	Partly sunny	33°1° (likely 33°1° to 39°4°)	33°1°	0%	1 mph2 km/h from NE, gusts 2 mph3 km/h	96%	45%	0
Sat 8a	Sunny	35°2° (likely 35°2° to 39°4°)	35°2°	0%	1 mph2 km/h from NE, gusts 2 mph4 km/h	92%	29%	0
Sat 9a	Sunny	41°5° (likely 41°5° to 44°7°)	41°5°	0%	1 mph2 km/h from NE, gusts 3 mph5 km/h	82%	28%	1
Sat 10a	Mostly sunny	49°9° (likely 49°9° to 51°11°)	49°9°	0%	1 mph2 km/h from NE, gusts 5 mph8 km/h	66%	23%	2
Sat 11a	Mostly sunny	54°12° (likely 54°12° to 56°13°)	54°12°	0%	1 mph2 km/h from NE, gusts 7 mph12 km/h	54%	17%	3
Sat 12p	Sunny	56°13° (likely 55°13° to 58°14°)	56°13°	0%	1 mph2 km/h from E, gusts 6 mph10 km/h	49%	5%	4
Sat 1p	Sunny	58°14° (likely 57°14° to 59°15°)	58°14°	0%	1 mph2 km/h from E, gusts 6 mph9 km/h	44%	4%	4
Sat 2p	Sunny	59°15° (likely 57°14° to 61°16°)	59°15°	0%	2 mph3 km/h from NE, gusts 4 mph7 km/h	42%	4%	4
Sat 3p	Sunny	60°16° (likely 58°14° to 61°16°)	60°16°	0%	2 mph3 km/h from NE, gusts 4 mph7 km/h	39%	3%	3
Sat 4p	Sunny	61°16° (likely 58°14° to 61°16°)	61°16°	0%	2 mph3 km/h from NE, gusts 5 mph7 km/h	39%	4%	2
Sat 5p	Sunny	60°16° (likely 57°14° to 60°16°)	60°16°	0%	1 mph2 km/h from SE, gusts 4 mph7 km/h	41%	3%	1
Sat 6p	Clear	57°14° (likely 53°12° to 57°14°)	57°14°	0%	0 mph0 km/h, gusts 5 mph8 km/h	47%	2%	0
Sat 7p	Clear	52°11° (likely 49°9° to 52°11°)	52°11°	0%	0 mph0 km/h, gusts 6 mph9 km/h	59%	2%	0
Sat 8p	Clear	46°8° (likely 46°8° to 50°10°)	46°8°	0%	0 mph0 km/h, gusts 5 mph8 km/h	71%	5%	0
Sat 9p	Clear	43°6° (likely 43°6° to 48°9°)	43°6°	0%	0 mph0 km/h, gusts 5 mph8 km/h	79%	0%	0
Sat 10p	Clear	41°5° (likely 41°5° to 46°8°)	41°5°	0%	0 mph0 km/h, gusts 5 mph8 km/h	85%	1%	0
Sat 11p	Clear	40°4° (likely 40°4° to 45°7°)	40°4°	0%	0 mph0 km/h, gusts 5 mph8 km/h	89%	3%	0
Sun 12a	Clear	39°4° (likely 39°4° to 44°7°)	39°4°	0%	0 mph0 km/h, gusts 4 mph7 km/h	92%	1%	0
Sun 1a	Clear	38°3° (likely 38°3° to 44°7°)	38°3°	0%	0 mph0 km/h, gusts 3 mph5 km/h	96%	0%	0
Sun 2a	Clear	37°3° (likely 37°3° to 43°6°)	37°3°	0%	0 mph0 km/h, gusts 3 mph4 km/h	100%	0%	0
Sun 3a	Clear	36°2° (likely 35°2° to 43°6°)	36°2°	0%	0 mph0 km/h, gusts 2 mph3 km/h	100%	0%	0
Sun 4a	Clear	36°2° (likely 35°2° to 42°6°)	36°2°	0%	0 mph0 km/h, gusts 2 mph3 km/h	100%	0%	0
Sun 5a	Clear	35°2° (likely 34°1° to 41°5°)	35°2°	0%	0 mph0 km/h, gusts 2 mph3 km/h	100%	0%	0
Sun 6a	Clear	34°1° (likely 33°1° to 40°4°)	34°1°	0%	0 mph0 km/h, gusts 2 mph3 km/h	100%	0%	0

Days ahead

Shaded: typical range for these dates (1991–2020)

Today, Oct 23. Sunny. High 60°16°, low 33°1°. Typical 64°18° / 41°5°. Dry. Forecasts agree.
1. Morning
  6 AM–noon
  Sunny, 43°6°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 59°15°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 47°8°
  Dry
4. Overnight
  midnight–6 AM
  Mostly clear, 35°2°
  Dry
Official NWS forecast
Today: Sunny, with a high near 60. Northeast wind 2 to 8 mph.
Tonight: Areas of frost between 1am and 3am, then areas of frost and patchy fog. Mostly clear, with a low around 33. Northeast wind 0 to 3 mph.
Forecasts agreeIndependent forecasts are close; the range is narrow.
High, likely
59°15°–60°16°
Low, likely
33°1°–45°7°
Typical high / low
64°18° / 41°5°
Wind
12 mph19 km/h, gusts 25 mph40 km/h
UV peak
4
Tomorrow, Oct 24. Cloudy. High 61°16°, low 32°0°. Typical 63°17° / 41°5°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 35°2°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 61°16°
  Dry
3. Evening
  6 PM–midnight
  Clear, 46°8°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 35°2°
  Dry
Official NWS forecast
Day: Areas of frost and patchy fog before 9am. Sunny, with a high near 61. Northeast wind around 2 mph.
Night: Patchy frost after 4am. Clear, with a low around 32. Wind around 0 mph.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
58°14°–61°16°
Low, likely
32°0°–39°4°
Typical high / low
63°17° / 41°5°
Wind
6 mph10 km/h
UV peak
4
Sunday, Oct 25. Sunny. High 63°17°, low 35°2°. Typical 63°17° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 38°3°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 62°16°
  Dry
3. Evening
  6 PM–midnight
  Clear, 49°10°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 40°4°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Patchy frost before 9am. Sunny, with a high near 63. West wind around 2 mph.
Night: Clear, with a low around 35.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
60°16°–63°17°
Low, likely
34°1°–39°4°
Typical high / low
63°17° / 40°4°
Wind
5 mph8 km/h, gusts 10 mph16 km/h
UV peak
4
Monday, Oct 26. Sunny. High 66°19°, low 44°7°. Typical 63°17° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 39°4°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 65°19°
  Dry
3. Evening
  6 PM–midnight
  Clear, 54°12°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 49°9°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 66.
Night: Clear, with a low around 44.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
64°18°–67°19°
Low, likely
36°2°–44°7°
Typical high / low
63°17° / 40°4°
Wind
9 mph14 km/h, gusts 17 mph27 km/h
UV peak
4
Tuesday, Oct 27. Mostly sunny. High 64°18°, low 40°4°. Typical 62°17° / 40°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Mostly clear, 52°11°
  Dry
4. Overnight
  midnight–6 AM
  Partly cloudy, 43°6°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Sunny, with a high near 64.
Night: Mostly clear, with a low around 40.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
63°17°–66°19°
Low, likely
40°4°–49°9°
Typical high / low
62°17° / 40°4°
Wind
10 mph16 km/h, gusts 21 mph33 km/h
UV peak
4
Wednesday, Oct 28. Cloudy. High 60°16°, low 42°6°. Typical 62°17° / 39°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Partly sunny, 42°6°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 61°16°
  Dry
3. Evening
  6 PM–midnight
  Cloudy, 52°11°
  Dry
4. Overnight
  midnight–6 AM
  Cloudy, 46°8°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 60.
Night: Mostly cloudy, with a low around 42.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
60°16°–62°17°
Low, likely
38°3°–45°7°
Typical high / low
62°17° / 39°4°
Wind
9 mph14 km/h, gusts 16 mph26 km/h
UV peak
3
Thursday, Oct 29. Partly sunny. High 65°18°, low 44°7°. Typical 62°17° / 39°4°. Dry. Mostly agree.
1. Morning
  6 AM–noon
  Sunny, 46°8°
  Dry
2. Afternoon
  noon–6 PM
  Mostly sunny, 65°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 54°12°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 48°9°
  Dry
Hours this far out come from computer models only.
Official NWS forecast
Day: Mostly sunny, with a high near 65.
Night: Partly cloudy, with a low around 44.
Mostly agreeIndependent forecasts are fairly close; small surprises are possible.
High, likely
63°17°–68°20°
Low, likely
41°5°–48°9°
Typical high / low
62°17° / 39°4°
Wind
14 mph22 km/h, gusts 29 mph47 km/h
UV peak
4
Friday, Oct 30. Cloudy. High 66°19°, low 48°9°. Typical 61°16° / 39°4°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 48°9°
  Dry
2. Afternoon
  noon–6 PM
  Cloudy, 64°18°
  Dry
3. Evening
  6 PM–midnight
  Clear, 54°12°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 47°8°
  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.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
61°16°–70°21°
Low, likely
45°7°–52°11°
Typical high / low
61°16° / 39°4°
Wind
9 mph15 km/h, gusts 21 mph33 km/h
UV peak
3
Saturday, Oct 31. Sunny. High 61°16°, low 45°7°. Typical 61°16° / 38°3°. Dry. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 46°8°
  Dry
2. Afternoon
  noon–6 PM
  Sunny, 59°15°
  Dry
3. Evening
  6 PM–midnight
  Clear, 50°10°
  Dry
4. Overnight
  midnight–6 AM
  Clear, 43°6°
  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.
Forecasts differIndependent forecasts disagree; expect changes and plan for the range.
High, likely
54°12°–69°21°
Low, likely
38°3°–52°11°
Typical high / low
61°16° / 38°3°
Wind
10 mph17 km/h, gusts 24 mph38 km/h
UV peak
4
Sunday, Nov 1. Drizzle. High 62°17°, low 50°10°. Typical 60°16° / 38°3°. Rain 0.13 in3.3 mm, 20% chance. Forecasts differ.
1. Morning
  6 AM–noon
  Sunny, 43°6°
  Dry
2. Afternoon
  noon–6 PM
  Drizzle, 59°15°
  20% chance · 0.05 in1.2 mm
3. Evening
  6 PM–midnight
  Drizzle, 52°11°
  20% chance · 0.02 in0.5 mm
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.
High, likely
58°14°–65°18°
Low, likely
37°3°–62°17°
Typical high / low
60°16° / 38°3°
Wind
20 mph33 km/h, gusts 41 mph66 km/h

10 days15 days30 days

The outlook

Today
Dry, high 60°, low 33°.
Tomorrow
Dry, high 61°, low 32°.
Sunday
Dry, high 63°, low 35°.
Rest of week
Mostly dry, highs 60–66°.

Want the meteorologists’ reasoning? Read the NWS forecast discussion (CTP) (opens in a new tab)

What changed since yesterday

No meaningful changes from yesterday’s forecast.

Radar

Radar data: NOAA MRMS, rendered by forecast.blue

Radar loads when scrolled into view

Full-screen radar

Rivers

NOAA river gauges within 25 mi

Conestoga River at Lancaster

14 mi

Below flood stage

Level: 3.7 ft
Flow: 274 cfs

Forecast peak 3.6 ft Fri 8 AM

Reading from Fri 6:15 AM · NWS gauge page

Pequea Creek near Ronks

7.6 mi

Level: 2.4 ft
Flow: 35 cfs

Reading from Fri 6:30 AM · NWS gauge page

West Branch Brandywine Creek at Honeybrook

10 mi

Below flood stage

Level: 1.0 ft
Flow: 13 cfs

Reading from Fri 5:45 AM · NWS gauge page

West Branch Brandywine Creek at Coatesville

10 mi

Below flood stage

Level: 3.5 ft
Flow: 16 cfs

Reading from Fri 5:45 AM · NWS gauge page

For your home

What this week’s weather means for heating, cooling, pipes and fresh air.

Heating this week

About 62% less heating than a typical week.

This week 37Typical 96

Heating degree days, base 65°F

Heat-pump hours, next 7 days

h below 47°F: 27
h below 17°F: 0
h below 5°F: 0

47, 17 and 5°F are the test points heat pumps are rated at. About 20 hours are near freezing and damp, when outdoor units defrost more often.

Comfort

Dry air outside (dew point 43°F).

Open the windows?

Sat, 3:00 PM–5:00 PM

Good stretch to open the windows (air quality forecast not available for part of this window).

Is this typical?

Lancaster 2 NE Filt Plant · official normals 1991–2020 · records 1949–2026

Oct 23, today vs a typical year

Today’s expected high is 4°2° colder than typical.

Last 7 days vs normal

—SatOct 17
—SunOct 18
—MonOct 19
—TueOct 20
—WedOct 21
—ThuOct 22
—FriOct 23

Gap weather by month: normals, records, snow and freeze dates

Sun & moon

Sun

Daylight: 10 h 50 min; Losing 2 min 30 s a day; shortest Dec 21, 1 h 30 min less
Golden hour: 5:35–6:29 PM; Morning 7:06–8:00 AM
Blue hour: 6:29–6:40 PM; Morning 6:55–7:06 AM; first light 6:55 AM

Stars tonight? Fair

Mostly clear 6:40–8 PM, but the moon is 95% lit and up.

Moon

Waxing gibbous

91% lit · growing

Today: sets 4:27 AM · rises 4:44 PM
Full moon: Oct 26
New moon: Nov 9

Looking southwest from Gap.Skyline from USGS elevation data, heights drawn up to 6× taller. Sky, sun and moon as they are now.

1 active weather alert

Freeze Watch

Gap, PA weather

Next 2 hours

Next 48 hours

Days ahead

The outlook

Today

Tomorrow

Sunday

Rest of week

What changed since yesterday

Radar

Rivers

Conestoga River at Lancaster

Pequea Creek near Ronks

West Branch Brandywine Creek at Honeybrook

West Branch Brandywine Creek at Coatesville

For your home

Heating this week

Heat-pump hours, next 7 days

Comfort

Open the windows?

Is this typical?

Oct 23, today vs a typical year

Last 7 days vs normal

Sun & moon

Sun

Stars tonight? Fair

Moon