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

East Deer

1,433 people, 1,130 ft above sea level in Allegheny County.

1,130 ftElevation, city center
1,433People, 2024 estimate
2 sq miLand area
Clear 37°
Clear now Dew point 35° · W 10 mph · high 36°
City of East Deer River Interstate 2 miles
Explore the plate Order a print

The East Deer 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 East Deer

NWS forecast and National Blend of Models · updated 7:00 PM EST
RIGHT NOW Pittsburgh/Butler Regional Airport (KBTP) · 7:56 PM
Clear
37° Clear Feels like 30° · high of 36° near 8 PM
WindW 10 mphno gusts
Humidity92%rising to 100% by morning
Pressure30.09 in →steady
Visibility10 mihaze-free
CloudsClear
UV index—no forecast
Dew point 35° · Dryabout the same for three days
DryComfortableStickyMuggyOppressive
NEXT RAIN
Rain
Tomorrow, about 1 AMin about 5 hours · 39% chance · rain
LIKELY AMOUNT—amounts come within 3 days
LAST RAINNov. 120.18 in · 2 dry days
ALERTS & OUTLOOKS
No watches or warnings for Allegheny County
NWS Pittsburgh and the Storm Prediction Center · checked 8:17 PM
SUN & MOON
↑ 7:04 AM5:02 PM ↓
9 h 58 m of daylight, 2 minutes less than yesterday
Waxing crescent, 27% lit. Next full moon: Nov. 24.
AIR & POLLEN
27
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
8p
11p
2a
5a
8a
11a
2p
5p
8p
11p
2a
5a
8a
11a
2p
5p
8p
11p
2a
5a
8a
11a
2p
5p
mostly cloudy night
mostly cloudy night
rain
mostly cloudy night
mostly cloudy day
mostly cloudy day
mostly cloudy day
partly cloudy night
partly cloudy night
mostly 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
clear day
clear night
TEMPERATURE °F
36°
36°
44°
35°
45°
28°
50°
CHANCE OF RAIN
39% · 0.05 in Sunday overnight 50%
WIND, MPH
12
9
8
7
8
10
9
6
2
0
0
0
3
5
6
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0
0
0
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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 Mostly cloudy Mostly cloudy
36° 32°
20% rain — W 11 A
SUN Nov. 15 Chance of showers; warmer Chance of showers; warmer
46° 32°
40% rain — NW 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 A
WED Nov. 18 Sunny Sunny
55° 27°
0% rain — S 5 B
THU Nov. 19 Mostly sunny Mostly sunny
58° 36°
0% rain — SSW 5 B
FRI Nov. 20 Mostly sunny Mostly sunny
59° 37°
0% rain — WSW 5 C
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 East Deer about 5,000 feet above the ground was over British Columbia three days ago, and over the Great Lakes a day ago, about 2,250 miles back along its path. Near the ground the air came from the Canadian Prairies; at 10,000 feet, from the open Pacific. 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, SIX YEARS AGO Nov. 11, 2020

The hottest this week has been

78° on Nov. 11, 2020, the hottest reading for this week of the year since 1927. Next is 70° in 2005.

70°
78°
20052020
Source: NOAA RCC-ACIS, the Natrona Lock 4 record since 1927.
MILE2
THE GROUND

What East Deer stands on

East Deer’s center stands about 1,130 ft above sea level. Within three miles the land runs from 730 ft to 1,270 ft, a difference of 540 ft: hilly country. The highest named summit within 15 miles is Rich Hill, about 1,290 ft, 3 miles west-southwest.

The section below crosses 3 rock units mapped at the surface.

Middlesex to Murrysville, cut in half

A section northwest to southeast, 24 miles through the town center
750 ft1,000 ft1,250 ft EAST DEER1,130 ftMiddlesex1,180 ftNew Kensington940 ft ← NW · MiddlesexMurrysville · SE →

Heights every 0.1 mile from the Copernicus GLO-90 surface model; vertical exaggeration about 30×. 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 16 mi of the line.

Casselman Formation

Shale, clastic. Age: Carboniferous, 299 to 324 million years old. About 7 mi of the line.

Allegheny Formation

Sandstone. Age: Carboniferous, 299 to 324 million years old. About 0.5 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 East Deer’s rain goes

A raindrop that lands in East Deer reaches the Gulf of America by way of Bailey Run, the Allegheny, the Ohio and the Mississippi: about 1,970 river miles.

THE WAY DOWN, TO SCALE
East Deer≈ 1,970 mi · the Gulf of America
FROM THE CENTER OF EAST DEER ≈ 1,970 mi to the Gulf of America Bailey Run → 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 East Deer; river miles along the main stem, rounded.

MILE5
THE ALMANAC

East Deer’s year

1991–2020 normals · records since 1927 · Natrona Lock 4, 4 mi east-northeast

East Deer has a hot-summer humid continental climate. Summer afternoons average 84° in July; winter nights fall to about 21° in January. About 42 inches of rain fall in a normal year.

36°21°40°21°50°27°62°38°72°50°80°59°84°63°82°62°76°55°64°43°52°33°41°26° JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC 1 TODAY EAST DEER 42.2 in rain a year
Normal high to low, by month Rain by month Freezing
July, average84° / 63°high / low, the warmest month
January, average36° / 21°high / low, the coldest month
Rain a year42.2 inwettest months: June and July
Hottest on record104°FJuly 6, 1977
Coldest on record−12°FFebruary 1, 2026
Wettest day on record5.70 inSeptember 18, 2004
Climate typeHot-summer humid continentalKöppen Dfa

AROUND THE RING

1Lows below freezingNov. 15 to April 1; normal lows fall below 32°
MONTH BY MONTH
JanFebMarAprMayJunJulAugSepOctNovDec
Normal high36°40°50°62°72°80°84°82°76°64°52°41°
Normal low21°21°27°38°50°59°63°62°55°43°33°26°
Rain, inches3.122.793.273.583.904.344.263.553.993.093.093.26

Normals 1991–2020 and records since 1927 at Natrona Lock 4, 4 miles east-northeast, 370 ft lower. NOAA, through RCC-ACIS.

MILE7
ON THE NETWORK

Around East Deer on the Forecast Network

Neighboring plates

Pittsburgh PA · 15 MI 15 miles southwest Hempfield PA · 24 MI 24 miles southeast Cleveland OH · 116 MI 116 miles northwest Columbus OH · 174 MI 174 miles west Washington DC · 188 MI 188 miles southeast Baltimore MD · 190 MI 190 miles southeast
FORECASTCITY
Map of East Deer, Pennsylvania. Explore the plate
PENNSYLVANIA · ALLEGHENY

East Deer

1,433 people, 1,130 ft above sea level in Allegheny County.

1,130 ftElevation
1,433People
2 sq miLand
Clear 37°
ClearDew point 35°
1

Today in East Deer

NEXT 15 HOURS
Now mostly cloudy night 36° 8%
11p mostly cloudy night 36° 20%
2a rain 36° 34%
5a mostly cloudy night 36° 26%
8a mostly cloudy day 37° 3%
11a mostly cloudy day 43° 2%
Rain
NEXT RAINTomorrow about 1 AM · 39%
→
Sat20%
Mostly cloudy Mostly cloudy
32
36
A
Sun40%
Chance of showers; warmer Chance of showers; warmer
32
46
A
Mon0%
Mostly cloudy Mostly cloudy
25
48
A
Tue0%
Partly cloudy Partly cloudy
26
52
A
Wed0%
Sunny Sunny
27
55
B
Thu0%
Mostly sunny Mostly sunny
36
58
B
Fri0%
Mostly sunny Mostly sunny
37
59
C
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

78°, the hottest this week of the year has been since 1927.

2

What East Deer stands on

East Deer’s center stands about 1,130 ft above sea level. Within three miles the land runs from 730 ft to 1,270 ft, a difference of 540 ft: hilly country. The highest named summit within 15 miles is Rich Hill, about 1,290 ft, 3 miles west-southwest.

East Deer, northwest to southeast East Deer1,130 ft ← NWSE → 24 miles through the town center; vertical exaggeration about 56×. Colors: rock at the surface.
Elevation, center1,130 ft
Within 3 miles730 to 1,270 ft
Lie of the landHilly (540 ft of relief)
High point nearbyRich Hill, 1,290 ft, 3 mi west-southwest
5

East Deer’s year

East Deer has a hot-summer humid continental climate. Summer afternoons average 84° in July; winter nights fall to about 21° in January. About 42 inches of rain fall in a normal year.

JANFEBMARAPRMAYJUNJULAUGSEPOCTNOVDEC 1 42.2 in
July, average84° / 63° · high / low, the warmest month
January, average36° / 21° · high / low, the coldest month
Rain a year42.2 in · wettest months: June and July
Hottest on record104°F · July 6, 1977
Coldest on record−12°F · February 1, 2026
Wettest day on record5.70 in · September 18, 2004
Climate typeHot-summer humid continental · Köppen Dfa
1Lows below freezing · Nov. 15 to April 1; normal lows fall below 32°
Normals 1991–2020 and records since 1927 at Natrona Lock 4, 4 miles east-northeast, 370 ft lower. NOAA, through RCC-ACIS.
3

Where the rain goes

≈ 1,970 mito the Gulf of AmericaBailey Run → Allegheny → Ohio → Mississippi

A raindrop that lands in East Deer reaches the Gulf of America by way of Bailey Run, the Allegheny, the Ohio and the Mississippi: about 1,970 river miles.

970 miles of the trip are on the Ohio.