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

Apollo

1,551 people, 860 ft above sea level in Armstrong County.

860 ftElevation, city center
1,551People, 2024 estimate
0 sq miLand area
Rain 38°
Rain now Dew point 38° · W 10 mph · high 41°
City of Apollo River Interstate 2 miles
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The Apollo 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 Apollo

NWS forecast and National Blend of Models · updated 12:00 PM EST
RIGHT NOW Pittsburgh/Butler Regional Airport (KBTP) · 12:56 PM
Rain
38° Rain Feels like 31° · high of 41° near 2 PM
WindW 10 mphgusts 20
Humidity100%falling to 82% this afternoon
Pressure29.98 in →steady
Visibility10 mihaze-free
CloudsClear
UV index—no forecast
Dew point 38° · Dry28° by Tuesday: drier air arrives
DryComfortableStickyMuggyOppressive
NEXT RAIN
Rain
Today, about 1 PMin about 1 hours · 37% chance · rain
LIKELY AMOUNT—amounts come within 3 days
LAST RAINNov. 70.05 in · 7 dry days
ALERTS & OUTLOOKS
No watches or warnings for Armstrong County
NWS Pittsburgh and the Storm Prediction Center · checked 1:17 PM
SUN & MOON
↑ 7:03 AM5:02 PM ↓
9 h 58 m of daylight, 2 minutes less than yesterday
Waxing crescent, 24% lit. Next full moon: Nov. 24.
AIR & POLLEN
28
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
1p
4p
7p
10p
1a
4a
7a
10a
1p
4p
7p
10p
1a
4a
7a
10a
1p
4p
7p
10p
1a
4a
7a
10a
rain
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
partly cloudy night
mostly cloudy night
mostly cloudy night
mostly cloudy day
mostly cloudy day
mostly cloudy day
partly cloudy night
mostly clear night
mostly clear night
mostly clear night
mostly clear night
mostly sunny
mostly sunny
TEMPERATURE °F
40°
36°
44°
35°
45°
28°
CHANCE OF RAIN
37% · 0.07 in Saturday afternoon 50%
WIND, MPH
13
13
12
9
8
7
7
10
10
8
3
0
0
0
2
5
5
3
0
0
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0
1
HOW IT FEELS · DEW POINT
Dry: dew points 28 to 39°

The next seven days, and how sure we are

Forecast, with the range 8 in 10 ensemble members agree on Normal, about 80° / 62°
SAT Nov. 14 Chance of showers Chance of showers
41° 32°
40% rain — WNW 13 A
SUN Nov. 15 Mostly cloudy Mostly cloudy
46° 32°
20% rain — NNW 9 A
MON Nov. 16 Mostly cloudy Mostly cloudy
48° 25°
0% rain — NW 4 A
TUE Nov. 17 Partly cloudy Partly cloudy
52° 26°
0% rain — SW 5 B
WED Nov. 18 Sunny Sunny
55° 27°
0% rain — S 5 B
THU Nov. 19 Partly cloudy Partly cloudy
58° 36°
0% rain — SSW 5 B
FRI Nov. 20 Partly cloudy Partly cloudy
59° 37°
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 Apollo about 5,000 feet above the ground was over Canada three days ago, and over the northern Plains a day ago, about 2,750 miles back along its path. It came down from about 15,900 feet up, warming and drying as it sank. Near the ground the air came from British Columbia; at 10,000 feet, from the open Pacific. It has stayed over land, which is why it feels dry. Traced back 72 hours through NOAA’s hourly RAP analyses and the GFS beyond them, nine paths at each of three heights.

THIS WEEK, SIX YEARS AGO Nov. 11, 2020

The hottest this week has been

77° on Nov. 11, 2020, the hottest reading for this week of the year since 1953. Next is 74° in 1993.

74°
77°
19932020
Source: NOAA RCC-ACIS, the Salina 3 W record since 1953.
MILE2
THE GROUND

What Apollo stands on

Apollo’s center stands about 860 ft above sea level. Within three miles the land runs from 780 ft to 1,370 ft, a difference of 590 ft: hilly country. The highest named summit within 15 miles is Rich Hill, about 1,290 ft, 14 miles west.

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.

East Deer to Young, cut in half

A section west to east, 24 miles through the town center
750 ft1,000 ft1,250 ft1,500 ft APOLLO860 ftNew Kensington980 ftLower Burrell990 ftHigh point of the line1,510 ft ← W · East DeerYoung · E →

Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 25×. 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

Glenshaw Formation

Shale. Age: Carboniferous, 299 to 324 million years old. About 12 mi of the line.

Casselman Formation

Shale, clastic. Age: Carboniferous, 299 to 324 million years old. About 8 mi of the line.

Monongahela Group

Limestone, shale, sandstone. Age: Carboniferous, 299 to 324 million years old. About 3 mi of the line.

Allegheny Formation

Sandstone. Age: Carboniferous, 299 to 324 million years old. About 2 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 Apollo’s rain goes

A raindrop that lands in Apollo reaches the Gulf of America by way of the Kiskiminetas, the Allegheny, the Ohio and the Mississippi: about 1,990 river miles.

THE WAY DOWN, TO SCALE
Apollo≈ 1,990 mi · the Gulf of America
FROM THE CENTER OF APOLLO ≈ 1,990 mi to the Gulf of America Kiskiminetas → 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 Apollo; river miles along the main stem, rounded.

MILE5
THE ALMANAC

Apollo’s year

1991–2020 normals · records since 1953 · Salina 3 W, 5 mi south

Apollo has a hot-summer humid continental climate. Summer afternoons average 83° in July; winter nights fall to about 20° in January. A normal year brings about 29 inches of snow; with the rain, that comes to about 46 inches of water.

36°20°39°21°48°28°61°38°71°48°79°57°83°61°82°59°75°53°63°42°51°33°41°25° JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC 12 TODAY APOLLO 45.6 in rain and snowmelt
Normal high to low, by month Record high to low, by day Rain by month Freezing
July, average83° / 61°high / low, the warmest month
January, average36° / 20°high / low, the coldest month
Rain and melted snow45.6 inwettest months: June and July
Snow a year28.6 insnowiest: February
Hottest on record101°FJuly 17, 1988
Coldest on record−30°FJanuary 21, 1994
Wettest day on record5.99 inSeptember 18, 2004
Snowiest day on record18.0 inFebruary 6, 2010
90° days a year10none reach 100°
Nights at or below 32°140and 32 days that stay below freezing
Climate typeHot-summer humid continentalKöppen Dfa

AROUND THE RING

1Freeze seasonfrom the first fall freeze, about Oct. 15, to the last in spring, about May 9 (median dates)
2Lows below freezingNov. 17 to March 31; normal lows fall below 32°
NOVEMBER 14 IN THE RECORD

On November 14 Apollo normally reaches 52° and falls to 33°. The record high is 70°, in 1989; the record low 9°, in 1986. The most rain on this date, 0.80 in, fell in 1985.

MONTH BY MONTH
JanFebMarAprMayJunJulAugSepOctNovDec
Normal high36°39°48°61°71°79°83°82°75°63°51°41°
Normal low20°21°28°38°48°57°61°59°53°42°33°25°
Rain and melt, in3.502.753.463.684.234.894.794.233.973.313.463.35
Snow, inches7.18.25.50.30.00.00.00.00.00.01.85.7
Record high71° (2020)76° (2018)83° (2012)90° (1990)92° (2018)96° (1988)101° (1988)100° (1988)98° (1953)88° (2019)82° (1961)74° (1982)
Record low−30° (1994)−21° (1979)−14° (1978)12° (2003)21° (2002)29° (2003)36° (1988)32° (1982)28° (1974)15° (1965)2° (1958)−20° (1989)

Normals 1991–2020 and records since 1953 at Salina 3 W, 5 miles south, 250 ft higher. NOAA, through RCC-ACIS.

MILE7
ON THE NETWORK

Around Apollo on the Forecast Network

Neighboring plates

Pittsburgh PA · 24 MI 24 miles southwest Bethel Park PA · 31 MI 31 miles southwest Cleveland OH · 126 MI 126 miles northwest Arlington VA · 176 MI 176 miles southeast Washington DC · 178 MI 178 miles southeast Baltimore MD · 180 MI 180 miles southeast
FORECASTCITY
Map of Apollo, Pennsylvania. Explore the plate
PENNSYLVANIA · ARMSTRONG

Apollo

1,551 people, 860 ft above sea level in Armstrong County.

860 ftElevation
1,551People
0 sq miLand
Rain 38°
RainDew point 38°
1

Today in Apollo

NEXT 15 HOURS
Now rain 40° 35%
4p rain 40° 37%
7p rain 37° 32%
10p mostly cloudy night 36° 19%
1a mostly cloudy night 36° 14%
4a mostly cloudy night 36° 17%
Rain
NEXT RAINToday about 1 PM · 37%
→
Sat40%
Chance of showers Chance of showers
32
41
A
Sun20%
Mostly cloudy Mostly cloudy
32
46
A
Mon0%
Mostly cloudy Mostly cloudy
25
48
A
Tue0%
Partly cloudy Partly cloudy
26
52
B
Wed0%
Sunny Sunny
27
55
B
Thu0%
Partly cloudy Partly cloudy
36
58
B
Fri0%
Partly cloudy Partly cloudy
37
59
B
Letters show how sure the forecast is: A, models agree; B, some spread; C, check back. Sample data.
THIS WEEK, SIX YEARS AGO · NOV. 11, 2020

77°, the hottest this week of the year has been since 1953.

2

What Apollo stands on

Apollo’s center stands about 860 ft above sea level. Within three miles the land runs from 780 ft to 1,370 ft, a difference of 590 ft: hilly country. The highest named summit within 15 miles is Rich Hill, about 1,290 ft, 14 miles west.

Apollo, west to east Apollo860 ft ← WE → 24 miles through the town center; vertical exaggeration about 47×. Colors: rock at the surface.
Elevation, center860 ft
Within 3 miles780 to 1,370 ft
Lie of the landHilly (590 ft of relief)
High point nearbyRich Hill, 1,290 ft, 14 mi west
Rock at the surfaceGlenshaw Formation
Its ageCarboniferous, 299 to 324 million years old
5

Apollo’s year

Apollo has a hot-summer humid continental climate. Summer afternoons average 83° in July; winter nights fall to about 20° in January. A normal year brings about 29 inches of snow; with the rain, that comes to about 46 inches of water.

JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC 12 45.6 in
July, average83° / 61° · high / low, the warmest month
January, average36° / 20° · high / low, the coldest month
Rain and melted snow45.6 in · wettest months: June and July
Snow a year28.6 in · snowiest: February
Hottest on record101°F · July 17, 1988
Coldest on record−30°F · January 21, 1994
Wettest day on record5.99 in · September 18, 2004
Snowiest day on record18.0 in · February 6, 2010
90° days a year10 · none reach 100°
Nights at or below 32°140 · and 32 days that stay below freezing
Climate typeHot-summer humid continental · Köppen Dfa
1Freeze season · from the first fall freeze, about Oct. 15, to the last in spring, about May 9 (median dates)
2Lows below freezing · Nov. 17 to March 31; normal lows fall below 32°
NOVEMBER 14 IN THE RECORD

On November 14 Apollo normally reaches 52° and falls to 33°. The record high is 70°, in 1989; the record low 9°, in 1986. The most rain on this date, 0.80 in, fell in 1985.

Normals 1991–2020 and records since 1953 at Salina 3 W, 5 miles south, 250 ft higher. NOAA, through RCC-ACIS.
3

Where the rain goes

≈ 1,990 mito the Gulf of AmericaKiskiminetas → Allegheny → Ohio → Mississippi

A raindrop that lands in Apollo reaches the Gulf of America by way of the Kiskiminetas, the Allegheny, the Ohio and the Mississippi: about 1,990 river miles.

970 miles of the trip are on the Ohio.