The Allegheny 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 Allegheny
NWS forecast and National Blend of Models · updated 6:00 PM EDT
RIGHT NOWAltoona - Blair County Airport (KAOO) · 6:53 PM
65°SunnyFeels like 65° · high of 66° near 7 PM
WindCalmno gusts
Humidity81%rising to 100% by morning
Pressure30.08 in →steady
Visibility10 mihaze-free
CloudsClear
UV index—no forecast
Dew point 59° · Comfortableabout the same for three days
DryComfortableStickyMuggyOppressive
NEXT RAIN
Friday, about 3 PMin about 68 hours · 48% chance · rain
LIKELY AMOUNT0–0.1 inmost likely 0; 1 in 10 over 0.5
LAST RAINSept. 270.11 in · 2 dry days
ALERTS & OUTLOOKS
No watches or warnings for Cambria County
NWS State College and the Storm Prediction Center · checked 7:17 PM
SUN & MOON
↑ 7:08 AM7:00 PM ↓
11 h 52 m of daylight, 3 minutes less than yesterday
Waning gibbous, 88% lit. The Harvest Moon was full Saturday.
AIR & POLLEN
17
GOODAir quality index · ozone
Tomorrow: 40, good. No pollen source yet.
The next three days, hour by hour
Sky: clear, cloudy, nightRain likelyNational Blend of Models
Forecast, with the range 8 in 10 ensemble members agree onNormal, about 69° / 49°
TUESept. 29Partly cloudy
66°52°
0% rain—NW 0A
WEDSept. 30Partly cloudy; warmer
77°58°
0% rain—SSW 3A
THUOct. 1Partly cloudy
79°61°
0% rain—SW 5B
FRIOct. 2Chance of showers
79°52°
50% rainup to 0.1″NW 8C
SATOct. 3Partly cloudy; cooler
66°46°
20% rain—E 1B
SUNOct. 4Chance of showers
65°45°
40% rainup to 0.4″SSW 3C
MONOct. 5Mostly sunny
63°37°
0% rain—NW 7C
How sure are we?AModels agree: highs within 4°BSome spread: within 8°CWide spread: check backRange from the National Blend of Models percentiles · graded on Forecast Scores
AIR MAIL
Where today’s air came from
The air arriving over Allegheny about 5,000 feet above the ground was over the Atlantic off the Carolinas three days ago, and over the Great Lakes a day ago, about 1,580 miles back along its path. Most of the nine paths traced from around the city agree. Near the ground the air came from the western Atlantic; at 10,000 feet, from the Atlantic off the Carolinas. Traced back 72 hours through NOAA’s hourly RAP analyses and the GFS beyond them, nine paths at each of three heights.