Latest PA Weather Summary:
493
AWUS81 KCTP 202232
RWSCTP
PAZ004>006-010>012-017>019-024>028-033>037-041-042-045-046-
049>053-056>059-063>066-211245-
Regional Weather Summary
National Weather Service State College PA
632 PM EDT Fri Jun 20 2025
A few rain showers, and maybe a rumble or two of thunder, will
track across roughly the southwest half of the Commomwealth
through late this evening. Otherwise, it will be fairly cloudy
tonight with low temperatures falling into the low to mid 60s
statewide.
Partly to mostly sunny skies arrive for Saturday, allowing
temperatures and humidity to rise, with highs generally in the
80s. The high temperature may reach around 90 across the
southeast piedmont. Although the most likely outcome is a dry day
for most, there is a small chance for a few strong to possibly
severe thunderstorms, particularly in northeast PA. Damaging winds
will be the primary threat.
A significant summer heat wave is expected to begin on Sunday and
last through early next week. Widespread major to extreme heat
risk is forecast, indicating an intensity and duration of heat
that is dangerous to anyone without adequate cooling or hydration.
Maximum heat index values are forecast to climb into the 100-110
degrees range in the lower terrain to the west and east of the
Allegheny Mountains.
$$
Latest Forecaster's Discussion:
563
FXUS61 KCTP 210156
AFDCTP
Area Forecast Discussion
National Weather Service State College PA
956 PM EDT Fri Jun 20 2025
.SYNOPSIS...
* Partly sunny and less humid for the first day of summer; a
spotty shower/t-storm possible downwind of Lake Erie across
the northern part of central PA through the evening
* Trending much warmer and more humid over the weekend;
conditional risk of strong/severe storms in NC/NE PA Sat PM
* Significant and dangerous heat wave Sunday through Wednesday
with major to extreme heat risk
&&
.NEAR TERM /THROUGH SATURDAY/...
Weak forcing downstream of convectively-aided shortwave trough
crossing lower MI combined with subtle llvl convergence zone
over northern PA will maintain isolated shower/t-storm probs
through early tonight. Most locations should remain dry with
POPs generally less than 20-30%. There will be an increase in
mid level clouds based on upstream visible satellite loop and
current forecast may not be bullish enough on the anticipated
sky cover this evening into tonight. Partly ?mostly? cloudy
tonight with patchy fog and lows in the 60s or +5-10 degrees
above mid June climo.
&&
.SHORT TERM /SATURDAY NIGHT THROUGH MONDAY/...
Trending warmer and more humid on Saturday with a mix of sun
and clouds. Max heat index values in the 80s to low 90s will be
a primer for the heat wave yet to come.
A thunderstorm complex likely ongoing early Saturday morning
in WI/MI is forecast to track to the southeast (into the
Northeast/New England) and could clip the northern/northeastern
portion of the forecast area Saturday afternoon and evening. No
change to the D2 SPC convective outlook which still shows
conditional severe probs over the northern tier/Endless Mtns.
A very mild night is expected Saturday night with lows in the
upper 60s to low 70s. Many locations in southeast PA may not
drop below 70F again until at least next weekend.
First significant and dangerous heat wave of the season
expected to impact central PA this weekend into the middle of
next week.
An expansive ridge will be centered over the Ohio Valley and
Central Appalachians by late Sunday. Height anomalies at 500
mb will be in the +2-3 sigma range. A strong capping inversion
(with mid level temps peaking in the 12-13C range over the
weekend) will greatly limit any airmass/orographic
shower/thunderstorm chances to sub 15 pct for Sun-Mon.
An Extreme Heat Watch remains in effect for locations east of
I-99 and south of I-80 for Sunday through Wednesday, where
confidence is highest in long duration heat concerns. Farther
north and west, Heat Advisories may be needed, but confidence is
not yet high enough for product issuance.
In addition to warm afternoon temperatures and heat index
values, overnight lows will provide little to no relief from the
heat. With the expected stretch of hot and humid conditions, those
with heightened susceptibility to heat, such as young children,
older adults, people with chronic medical conditions, and
pregnant women, should prepare to limit time outdoors, wear
light clothing, and drink plenty of water later this weekend
and early next week.
The fact that we have been in a stretch of relatively cool
conditions means the quick switch into significant heat and
humidity could exacerbate the risk for heat-related impacts,
with little time for the body to acclimate.
Monday looks to be the hottest day of the stretch, with highs
currently forecast in the 90s for most of the area.
&&
.LONG TERM /MONDAY NIGHT THROUGH FRIDAY/...
Tuesday may rival Monday`s temps especially in the Lower Susq.
On this shift we shaved a few degrees off the dewpoints for Tue
given drier NW flow just above the boundary layer.
The heat only decreases slightly toward the middle of next week
with heights at the center of the 500mb level ridge falling by
about 5-6 decameters and GEFS Mean temps in the 925-850 mb layer
dipping by 1-2 deg C from Mon/Tue to Wed. PoPs increases into
the 30-60 pct range Wed and Thu afternoons as a slow moving
cold front approaches southern New York State and stability
begins to erode.
&&
.AVIATION /02Z SATURDAY THROUGH WEDNESDAY/...
VFR flying expected through the overnight and much of Saturday
TAF period. A couple of showers passing through the southwest
corner of the airspace (JST/AOO) through midnight but no
reductions noted so far.
Conditional risk of t-storms over northern/northeast PA
Saturday PM as convective complex tracks southeast from WI/MI.
Outlook...
Sat-Wed...Mainly VFR. Hot. Slight chance of SHRA/TSRA late Sat
and again on Tue.
&&
.CLIMATE...
Astronomical Summer (solstice) officially arrives (today)
Friday, June 20, at 10:42 p.m. The daylength in State College
will be maximized at 15 hours, 6 minutes, and 12 seconds or 5
hours and 51 minutes longer than the Winter solstice in
December. The summer season will last 93 days, 15 hours, and 37
minutes before the Fall Equinox on September 22nd at 2:19 p.m.
Wet End to Spring in State College:
6th wettest May 1-June 19
13th wettest June 1-19
With a heat wave starting on Sunday and lasting into the middle
of next week, some locations may reach or exceed the daily
record hi/max and hi/min temperatures.
&&
.CTP WATCHES/WARNINGS/ADVISORIES...
Extreme Heat Watch from Sunday morning through Wednesday
evening for PAZ019-026>028-035-036-045-046-049>053-056>059-
063>066.
&&
$$
SYNOPSIS...Steinbugl
NEAR TERM...Steinbugl
SHORT TERM...Steinbugl
LONG TERM...Lambert/Colbert
AVIATION...Steinbugl/Gartner
CLIMATE...Steinbugl
Latest Public Information Statement:
305
NOUS41 KCTP 180601
PNSCTP
PAZ004>006-010>012-017>019-024>028-033>037-041-042-045-046-049>053-056>059-
063>066-181801-
Public Information Statement
National Weather Service State College PA
201 AM EDT Wed Jun 18 2025
...PRECIPITATION REPORTS IN THE PAST 24 HOURS...
Location Amount Time/Date Provider
...Pennsylvania...
...Bedford County...
Claysburg 1.84 in 1216 AM 06/18 CWOP
Saxton 1.76 in 1215 AM 06/18 CWOP
...Blair County...
Altoona 2.25 in 1215 AM 06/18 CWOP
3 N Ski Gap 2.03 in 1221 AM 06/18 Trained Spotter
Blair Helibase 1.98 in 1116 PM 06/17 RAWS
2 NE Altoona 1.73 in 1223 AM 06/18 Public
4 NNE Williamsburg 1.65 in 1215 AM 06/18 AWS
Altoona-Blair County Airport 1.62 in 1153 PM 06/17 ASOS
Altoona 1.31 in 1215 AM 06/18 CWOP
WILLIAMSBURG 1.31 in 1216 AM 06/18 CWOP
...Cambria County...
Ebensburg 3.41 in 1216 AM 06/18 CWOP
MINERAL POINT 2.21 in 1218 AM 06/18 CWOP
1 WSW Vinco 1.75 in 0831 PM 06/17 Public
Johnstown Airport 1.32 in 1154 PM 06/17 ASOS
Mineral Point 1.17 in 1220 AM 06/18 CWOP
...Centre County...
Spring Mills 0.99 in 1220 AM 06/18 CWOP
...Elk County...
Ridgway 1.38 in 1219 AM 06/18 AWS
Saint Marys 0.97 in 1215 AM 06/18 CWOP
...Franklin County...
Greencastle 1.30 in 1215 AM 06/18 CWOP
...Fulton County...
Forney Trail 1.43 in 1149 PM 06/17 RAWS
Mcconnellsburg 1.01 in 1211 AM 06/18 CWOP
...Huntingdon County...
Wood 0.1 S 2.50 in 1000 PM 06/17 COCORAHS
1.0 S Raystown Dam 1.97 in 1200 AM 06/18 HADS
Huntingdon 1.55 in 1217 AM 06/18 CWOP
0.9 SW Huntingdon 1.02 in 1200 AM 06/18 HADS
...Mifflin County...
LEWISTOWN 1.16 in 1220 AM 06/18 CWOP
Chestnut Springs 1.11 in 1151 PM 06/17 RAWS
&&
**METADATA**
:6/18/2025,1215 AM, PA, Bedford, Saxton, , , 40.2202, -78.2368, RAIN_24, 1.76, Inch, CWOP, 24 hour rainfall,
:6/18/2025,1216 AM, PA, Bedford, Claysburg, , , 40.2599, -78.4924, RAIN_24, 1.84, Inch, CWOP, 24 hour rainfall,
:6/18/2025,1215 AM, PA, Blair, Altoona, , , 40.5398, -78.3472, RAIN_24, 1.31, Inch, CWOP, 24 hour rainfall,
:6/18/2025,1216 AM, PA, Blair, WILLIAMSBURG, , , 40.4173, -78.2613, RAIN_24, 1.31, Inch, CWOP, 24 hour rainfall,
:6/17/2025,1153 PM, PA, Blair, Altoona-Blair County Airport, , , 40.2999, -78.3168, RAIN_24, 1.62, Inch, ASOS, 24 hour rainfall,
:6/18/2025,1215 AM, PA, Blair, 4 NNE Williamsburg, , , 40.5311, -78.1844, RAIN_24, 1.65, Inch, AWS, 24 hour rainfall,
:6/18/2025,1223 AM, PA, Blair, 2 NE Altoona, , , 40.5207460003536, -78.37720500229727, RAIN_24, 1.73, Inch, Public, 24 hour rainfall,
:6/17/2025,1116 PM, PA, Blair, Blair Helibase, , , 40.4417, -78.4197, RAIN_24, 1.98, Inch, RAWS, 24 hour rainfall,
:6/18/2025,1221 AM, PA, Blair, 3 N Ski Gap, , , 40.3632901, -78.5154676, RAIN_24, 2.03, Inch, Trained Spotter, 24 hour rainfall,
:6/18/2025,1215 AM, PA, Blair, Altoona, , , 40.4283, -78.3513, RAIN_24, 2.25, Inch, CWOP, 24 hour rainfall,
:6/18/2025,1220 AM, PA, Cambria, Mineral Point, , , 40.3988, -78.7963, RAIN_24, 1.17, Inch, CWOP, 24 hour rainfall,
:6/17/2025,1154 PM, PA, Cambria, Johnstown Airport, , , 40.3167, -78.8333, RAIN_24, 1.32, Inch, ASOS, 24 hour rainfall,
:6/17/2025,0831 PM, PA, Cambria, 1 WSW Vinco, , , 40.4047, -78.8558, RAIN_24, 1.75, Inch, Public, 24 hour rainfall,
:6/18/2025,1218 AM, PA, Cambria, MINERAL POINT, , , 40.4147, -78.8363, RAIN_24, 2.21, Inch, CWOP, 24 hour rainfall,
:6/18/2025,1216 AM, PA, Cambria, Ebensburg, , , 40.49, -78.7218, RAIN_24, 3.41, Inch, CWOP, 24 hour rainfall,
:6/18/2025,1220 AM, PA, Centre, Spring Mills, , , 40.8348, -77.5628, RAIN_24, 0.99, Inch, CWOP, 24 hour rainfall,
:6/18/2025,1215 AM, PA, Elk, Saint Marys, , , 41.4215, -78.5762, RAIN_24, 0.97, Inch, CWOP, 24 hour rainfall,
:6/18/2025,1219 AM, PA, Elk, Ridgway, , , 41.4213, -78.7294, RAIN_24, 1.38, Inch, AWS, 24 hour rainfall,
:6/18/2025,1215 AM, PA, Franklin, Greencastle, , , 39.741, -77.724, RAIN_24, 1.3, Inch, CWOP, 24 hour rainfall,
:6/18/2025,1211 AM, PA, Fulton, Mcconnellsburg, , , 39.8787, -78.0181, RAIN_24, 1.01, Inch, CWOP, 24 hour rainfall,
:6/17/2025,1149 PM, PA, Fulton, Forney Trail, , , 39.9934, -77.9589, RAIN_24, 1.43, Inch, RAWS, 24 hour rainfall,
:6/18/2025,1200 AM, PA, Huntingdon, 0.9 SW Huntingdon, , , 40.4847, -78.0192, RAIN_24, 1.02, Inch, HADS, 24 hour rainfall,
:6/18/2025,1217 AM, PA, Huntingdon, Huntingdon, , , 40.5151, -78.0145, RAIN_24, 1.55, Inch, CWOP, 24 hour rainfall,
:6/18/2025,1200 AM, PA, Huntingdon, 1.0 S Raystown Dam, , , 40.435, -78.0069, RAIN_24, 1.97, Inch, HADS, 24 hour rainfall,
:6/17/2025,1000 PM, PA, Huntingdon, Wood 0.1 S, , , 40.1675, -78.1363, RAIN_24, 2.5, Inch, COCORAHS, 24 hour rainfall,
:6/17/2025,1151 PM, PA, Mifflin, Chestnut Springs, , , 40.6914, -77.7026, RAIN_24, 1.11, Inch, RAWS, 24 hour rainfall,
:6/18/2025,1220 AM, PA, Mifflin, LEWISTOWN, , , 40.6173, -77.5835, RAIN_24, 1.16, Inch, CWOP, 24 hour rainfall,
Observations are collected from a variety of sources with varying
equipment and exposures. We thank all volunteer weather observers
for their dedication. Not all data listed are considered official.
$$
MRS
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