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Shaded-relief map of Big Run, Pennsylvania: rivers, roads, the city limits and where the water drains.
PENNSYLVANIA · JEFFERSON COUNTY

Big Run

622 people, 1,380 ft above sea level in Jefferson County.

1,380 ftElevation, city center
622People, 2024 estimate
1 sq miLand area
Clear 37°
Clear now Dew point 35° · W 12 mph · high 39°
City of Big Run River Interstate 2 miles
Explore the plate Order a print

The Big Run plate. Relief from Copernicus GLO-30; rivers and lakes from USGS NHD; watersheds from the USGS Watershed Boundary Dataset; roads and city limits from Census TIGER 2024.

MILE1
TODAY

Today in Big Run

NWS forecast and National Blend of Models · updated 5:00 PM EST
RIGHT NOW Du Bois - Jefferson County Airport (KDUJ) · 5:33 PM
Clear
37° Clear Feels like 29° · high of 39° near 5 PM
WindW 12 mphno gusts
Humidity92%rising to 100% by morning
Pressure29.94 in →steady
Visibility4 mihazy
CloudsClear
UV index—no forecast
Dew point 35° · Dry26° by Sunday: drier air arrives
DryComfortableStickyMuggyOppressive
NEXT RAIN
Mostly cloudy
Tonight, about 7 PMin about 1 hours · 38% chance · rain
LIKELY AMOUNT—amounts come within 3 days
LAST RAINNov. 120.16 in · 2 dry days
ALERTS & OUTLOOKS
No watches or warnings for Jefferson County
NWS Pittsburgh and the Storm Prediction Center · checked 5:47 PM
SUN & MOON
↑ 7:01 AM4:58 PM ↓
9 h 56 m of daylight, 2 minutes less than yesterday
Waxing crescent, 26% lit. Next full moon: Nov. 24.
AIR & POLLEN
19
GOODAir quality index · ozone
Tomorrow: 25, good. No pollen source yet.

The next three days, hour by hour

Sky: clear, cloudy, night Rain likely National Blend of Models
SATURDAY, NOV. 14
SUNDAY, NOV. 15
MONDAY, NOV. 16
TUESDAY, NOV. 17
5p
8p
11p
2a
5a
8a
11a
2p
5p
8p
11p
2a
5a
8a
11a
2p
5p
8p
11p
2a
5a
8a
11a
2p
mostly cloudy night
mostly cloudy night
mostly cloudy night
mostly cloudy night
mostly cloudy night
mostly cloudy day
mostly cloudy day
mostly cloudy day
mostly cloudy night
mostly cloudy night
mostly cloudy night
mostly cloudy night
mostly cloudy night
mostly cloudy day
mostly cloudy day
mostly cloudy day
partly cloudy night
partly cloudy night
mostly clear night
mostly clear night
partly cloudy night
mostly sunny
mostly sunny
clear day
TEMPERATURE °F
39°
33°
41°
33°
44°
28°
CHANCE OF RAIN
38% · 0.02 in Saturday evening 50%
WIND, MPH
12
10
9
9
8
9
10
10
7
5
4
4
5
7
8
7
5
4
1
2
4
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7
7
HOW IT FEELS · DEW POINT
Dry: dew points 26 to 35°

The next seven days, and how sure we are

Forecast, with the range 8 in 10 ensemble members agree on Normal, about 48° / 32°
SAT Nov. 14 Chance of showers Chance of showers
39° 32°
40% rain — WNW 11 A
SUN Nov. 15 Mostly cloudy Mostly cloudy
43° 32°
10% rain — NNW 10 A
MON Nov. 16 Mostly cloudy Mostly cloudy
46° 28°
0% rain — NW 7 A
TUE Nov. 17 Partly cloudy Partly cloudy
50° 27°
0% rain — WSW 5 A
WED Nov. 18 Sunny Sunny
53° 29°
0% rain — SSW 3 B
THU Nov. 19 Partly cloudy Partly cloudy
56° 36°
0% rain — SSW 6 B
FRI Nov. 20 Partly cloudy Partly cloudy
57° 38°
0% rain — WSW 5 B
How sure are we? AModels agree: highs within 4° BSome spread: within 8° CWide spread: check back
Range from the National Blend of Models percentiles · graded on Forecast Scores
AIR MAIL

Where today’s air came from

The air arriving over Big Run about 5,000 feet above the ground was over British Columbia three days ago, and over the Great Lakes a day ago, about 2,460 miles back along its path. It came down from about 11,000 feet up, warming and drying as it sank. Near the ground the air came from the Canadian Prairies; at 10,000 feet, from the Gulf of Alaska. It feels dry all the same. Traced back 72 hours through NOAA’s hourly RAP analyses and the GFS beyond them, nine paths at each of three heights.

THIS WEEK IN 1989 Nov. 13, 1989

The hottest this week has been

68° on Nov. 13, 1989, the hottest reading for this week of the year since 1962. Next is 68° in 1994.

68°
68°
19941989
Source: NOAA RCC-ACIS, the Dubois Regional Airport record since 1962.
MILE2
THE GROUND

What Big Run stands on

Big Run’s center stands about 1,380 ft above sea level. Within three miles the land runs from 1,280 ft to 1,800 ft, a difference of 520 ft: hilly country. The highest named summit within 15 miles is Kinter Hill, about 2,110 ft, 13 miles south-southwest.

Under the town center the state geologic map shows Glenshaw Formation (shale), from the Carboniferous, 299 to 324 million years old.

The section below crosses 4 rock units mapped at the surface.

Oliver to Greenwood, cut in half

A section northwest to southeast, 24 miles through the town center
1,250 ft1,500 ft1,750 ft2,000 ft BIG RUN1,380 ftOliver1,450 ftHigh point of the line2,240 ftBell1,960 ftWest Branch Susquehanna Riverabout 1,240 ft ← NW · OliverGreenwood · SE →

Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 19×. The colored band under the surface is the rock the state geologic map shows at the surface, not a picture of what lies beneath.

Rock at the surface along the line

Allegheny Formation

Sandstone. Age: Carboniferous, 299 to 324 million years old. About 15 mi of the line.

Glenshaw Formation

Shale. Age: Carboniferous, 299 to 324 million years old. About 6 mi of the line.

Pottsville Formation

Sandstone, conglomerate. Age: Carboniferous, 299 to 324 million years old. About 2 mi of the line.

Casselman Formation

Shale, clastic. Age: Carboniferous, 299 to 324 million years old. About 1 mi of the line.

From the USGS State Geologic Map Compilation (Horton and others, 2017), the states’ geologic maps joined at a common scale.

Heights from Copernicus GLO-90 (a surface model: it includes buildings and tree canopy); summits from USGS GNIS; rivers from USGS NHDPlus HR; rock from the USGS State Geologic Map Compilation.

MILE3
THE WATER

Where Big Run’s rain goes

A raindrop that lands in Big Run reaches the Gulf of America by way of Mahoning Creek, the Allegheny, the Ohio and the Mississippi: about 2,060 river miles.

THE WAY DOWN, TO SCALE
Big Run≈ 2,060 mi · the Gulf of America
FROM THE CENTER OF BIG RUN ≈ 2,060 mi to the Gulf of America Mahoning Creek → Allegheny → Ohio → Mississippi

970 miles of the trip are on the Ohio.

Traced down the USGS NHDPlus V2.1 river network from the Census center point of Big Run; river miles along the main stem, rounded.

MILE5
THE ALMANAC

Big Run’s year

1991–2020 normals · records since 1962 · Dubois Regional Airport, 14 mi north

Big Run has a warm-summer humid continental climate. Summer afternoons average 79° in July; winter nights fall to about 17° in January. About 42 inches of rain fall in a normal year.

31°17°35°19°44°26°58°36°68°47°75°55°79°59°78°58°71°51°59°41°47°32°36°23° JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC 123 TODAY BIG RUN 42.4 in rain a year
Normal high to low, by month Record high to low, by day Rain by month Freezing
July, average79° / 59°high / low, the warmest month
January, average31° / 17°high / low, the coldest month
Rain a year42.4 inwettest months: June and July
Hottest on record101°FJuly 22, 2011
Coldest on record−26°FJanuary 19, 1994
Wettest day on record5.65 inSeptember 29, 2015
Snowiest day on record16.3 inMarch 13, 1993
90° days a year2on average, 1991–2020
Nights at or below 32°138and 52 days that stay below freezing
Climate typeWarm-summer humid continentalKöppen Dfb

AROUND THE RING

1Freeze seasonfrom the first fall freeze, about Oct. 12, to the last in spring, about May 10 (median dates)
2Highs below freezingJan. 3 to Feb. 5; normal highs stay below 32°
3Lows below freezingNov. 12 to April 5; normal lows fall below 32°
NOVEMBER 14 IN THE RECORD

On November 14 Big Run normally reaches 48° and falls to 32°. The record high is 68°, in 1994; the record low 8°, in 1986. The most rain on this date, 1.05 in, fell in 2011.

MONTH BY MONTH
JanFebMarAprMayJunJulAugSepOctNovDec
Normal high31°35°44°58°68°75°79°78°71°59°47°36°
Normal low17°19°26°36°47°55°59°58°51°41°32°23°
Rain, inches2.932.383.263.723.694.664.363.893.963.403.212.96
Record high66° (2008)73° (2017)79° (1986)88° (1985)89° (2015)92° (2024)101° (2011)96° (2001)91° (2010)86° (2019)79° (2024)72° (1982)
Record low−26° (1994)−17° (2015)−7° (2015)8° (1982)22° (1966)32° (1966)40° (2001)34° (1982)29° (2000)16° (1969)2° (1976)−14° (1983)

Normals 1991–2020 and records since 1962 at Dubois Regional Airport, 14 miles north, 430 ft higher. NOAA, through RCC-ACIS.

MILE7
ON THE NETWORK

Around Big Run on the Forecast Network

Neighboring plates

Pittsburgh PA · 68 MI 68 miles southwest Cleveland OH · 150 MI 150 miles west Baltimore MD · 166 MI 166 miles southeast Washington DC · 173 MI 173 miles southeast
FORECASTCITY
Map of Big Run, Pennsylvania. Explore the plate
PENNSYLVANIA · JEFFERSON

Big Run

622 people, 1,380 ft above sea level in Jefferson County.

1,380 ftElevation
622People
1 sq miLand
Clear 37°
ClearDew point 35°
1

Today in Big Run

NEXT 15 HOURS
Now mostly cloudy night 39° 0%
8p mostly cloudy night 38° 21%
11p mostly cloudy night 36° 4%
2a mostly cloudy night 34° 3%
5a mostly cloudy night 34° 7%
8a mostly cloudy day 34° 2%
Mostly cloudy
NEXT RAINTonight about 7 PM · 38%
→
Sat40%
Chance of showers Chance of showers
32
39
A
Sun10%
Mostly cloudy Mostly cloudy
32
43
A
Mon0%
Mostly cloudy Mostly cloudy
28
46
A
Tue0%
Partly cloudy Partly cloudy
27
50
A
Wed0%
Sunny Sunny
29
53
B
Thu0%
Partly cloudy Partly cloudy
36
56
B
Fri0%
Partly cloudy Partly cloudy
38
57
B
Letters show how sure the forecast is: A, models agree; B, some spread; C, check back. Sample data.
THIS WEEK IN 1989 · NOV. 13, 1989

68°, the hottest this week of the year has been since 1962.

2

What Big Run stands on

Big Run’s center stands about 1,380 ft above sea level. Within three miles the land runs from 1,280 ft to 1,800 ft, a difference of 520 ft: hilly country. The highest named summit within 15 miles is Kinter Hill, about 2,110 ft, 13 miles south-southwest.

Big Run, northwest to southeast Big Run1,380 ftWest Branch Susquehanna Riverabout 1,240 ft ← NWSE → 24 miles through the town center; vertical exaggeration about 36×. Colors: rock at the surface.
Elevation, center1,380 ft
Within 3 miles1,280 to 1,800 ft
Lie of the landHilly (520 ft of relief)
High point nearbyKinter Hill, 2,110 ft, 13 mi south-southwest
Rock at the surfaceGlenshaw Formation
Its ageCarboniferous, 299 to 324 million years old
5

Big Run’s year

Big Run has a warm-summer humid continental climate. Summer afternoons average 79° in July; winter nights fall to about 17° in January. About 42 inches of rain fall in a normal year.

JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC 123 42.4 in
July, average79° / 59° · high / low, the warmest month
January, average31° / 17° · high / low, the coldest month
Rain a year42.4 in · wettest months: June and July
Hottest on record101°F · July 22, 2011
Coldest on record−26°F · January 19, 1994
Wettest day on record5.65 in · September 29, 2015
Snowiest day on record16.3 in · March 13, 1993
90° days a year2 · on average, 1991–2020
Nights at or below 32°138 · and 52 days that stay below freezing
Climate typeWarm-summer humid continental · Köppen Dfb
1Freeze season · from the first fall freeze, about Oct. 12, to the last in spring, about May 10 (median dates)
2Highs below freezing · Jan. 3 to Feb. 5; normal highs stay below 32°
3Lows below freezing · Nov. 12 to April 5; normal lows fall below 32°
NOVEMBER 14 IN THE RECORD

On November 14 Big Run normally reaches 48° and falls to 32°. The record high is 68°, in 1994; the record low 8°, in 1986. The most rain on this date, 1.05 in, fell in 2011.

Normals 1991–2020 and records since 1962 at Dubois Regional Airport, 14 miles north, 430 ft higher. NOAA, through RCC-ACIS.
3

Where the rain goes

≈ 2,060 mito the Gulf of AmericaMahoning Creek → Allegheny → Ohio → Mississippi

A raindrop that lands in Big Run reaches the Gulf of America by way of Mahoning Creek, the Allegheny, the Ohio and the Mississippi: about 2,060 river miles.

970 miles of the trip are on the Ohio.