Allentown, Pennsylvania Weather Conditions

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Current Conditions

  • 72°
  • Clear
  • Wind: NNW 6 mph
  • Humidity: 69%
  • Visibility: 10.0 miles
  • Dew Point: 61°
  • Pressure: 29.92 in. +

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Next 12 Hours

2  am
5  am
8  am
11  am
2  pm
Partly Cloudy
Partly Cloudy
Clear
Clear
Clear
Clear
Clear
Clear
Partly Cloudy
Partly Cloudy
68°
66°
66°
72°
75°
Forecast data from the National Digital Forecast Database.

5 Day Forecast

  • Thursday
  • Partly Cloudy
  • High: 79 °
  • Low: 54 °
  • Partly Cloudy
  • Friday
  • Partly Cloudy
  • High: 79 °
  • Low: 57 °
  • Partly Cloudy
  • Saturday
  • Partly Cloudy
  • High: 79 °
  • Low: 68 °
  • Partly Cloudy
  • Sunday
  • Mostly Cloudy
  • High: 86 °
  • Low: 68 °
  • Mostly Cloudy
  • Monday
  • Partly Cloudy
  • High: 90 °
  • Low: 66 °
  • Partly Cloudy

Forecast for Allentown, Pennsylvania

Updated: 5:00 AM EDT on August 28, 2014

  • Thursday

    Clear in the morning, then partly cloudy. High of 79F. Winds from the NNW at 10 to 15 mph.

  • Thursday Night

    Clear. Low of 54F. Winds less than 5 mph.

  • Friday

    Clear in the morning, then partly cloudy. High of 79F. Winds less than 5 mph.

  • Friday Night

    Partly cloudy. Fog overnight. Low of 57F. Winds less than 5 mph.

  • Saturday

    Partly cloudy. High of 79F. Winds from the SSE at 5 to 10 mph.

  • Saturday Night

    Mostly cloudy. Fog overnight. Low of 68F. Winds less than 5 mph.

  • Sunday

    Overcast. High of 86F. Winds from the SW at 5 to 10 mph.

  • Sunday Night

    Overcast with a chance of a thunderstorm and rain in the evening, then partly cloudy. Low of 68F. Winds less than 5 mph. Chance of rain 20%.

  • Monday

    Partly cloudy in the morning, then overcast. High of 90F. Winds from the WSW at 5 to 10 mph.

  • Monday Night

    Partly cloudy with a chance of a thunderstorm. Low of 66F. Winds less than 5 mph. Chance of rain 20%.

  • Tuesday

    Partly cloudy with a chance of a thunderstorm. High of 91F with a heat index of 99F. Winds from the WNW at 5 to 10 mph. Chance of rain 40%.

  • Tuesday Night

    Partly cloudy. Low of 66F. Winds from the NNW at 5 to 10 mph.

  • Wednesday

    Partly cloudy. High of 84F. Winds less than 5 mph.

  • Wednesday Night

    Clear. Low of 59F. Winds less than 5 mph.

  • Thursday

    Partly cloudy with a chance of a thunderstorm. Fog early. High of 79F. Winds from the SW at 5 to 10 mph. Chance of rain 50%.

  • Thursday Night

    Partly cloudy with a chance of a thunderstorm. Fog overnight. Low of 64F. Winds less than 5 mph. Chance of rain 20%.

  • Friday

    Partly cloudy with a chance of a thunderstorm. High of 84F. Winds less than 5 mph. Chance of rain 40%.

  • Friday Night

    Partly cloudy with a chance of a thunderstorm. Fog overnight. Low of 55F. Winds less than 5 mph. Chance of rain 40%.

  • Saturday

    Clear with a chance of a thunderstorm. Fog early. High of 75F. Winds less than 5 mph. Chance of rain 40%.

  • Saturday Night

    Clear with a chance of a thunderstorm. Fog overnight. Low of 54F. Winds less than 5 mph. Chance of rain 40%.

  • Sunday

    Clear with a chance of a thunderstorm. Fog early. High of 75F. Winds less than 5 mph. Chance of rain 40%.

  • Sunday Night

    Clear with a chance of a thunderstorm. Fog overnight. Low of 54F. Winds less than 5 mph. Chance of rain 20%.

Personal Weather Stations

Personal Weather Stations [Add your weather station!]

Location: South Filmore Street, Allentown, PA

Updated: 3:18 AM EDT

Temperature: 72.1 °F Dew Point: 63 °F Humidity: 72% Wind: West at 4.2 mph Pressure: 29.84 in Hourly Precipitation: - Heat Index: 74 °F Graphs

Location: South Allentown, Allentown, PA

Updated: 3:23 AM EDT

Temperature: 72.5 °F Dew Point: 61 °F Humidity: 67% Wind: North at 3.4 mph Pressure: 29.79 in Hourly Precipitation: 0.00 in Heat Index: 75 °F Graphs

Location: Whitehall, Whitehall, PA

Updated: 3:20 AM EDT

Temperature: 71.6 °F Dew Point: 59 °F Humidity: 65% Wind: NNE at 2.0 mph Pressure: 29.49 in Hourly Precipitation: 0.00 in Heat Index: 75 °F Graphs

Location: Hokendauqua, Whitehall, PA

Updated: 3:23 AM EDT

Temperature: 71.5 °F Dew Point: 60 °F Humidity: 67% Wind: NNW at 2.0 mph Pressure: 29.86 in Hourly Precipitation: 0.00 in Heat Index: 75 °F Graphs

Location: Fountain Hill - Near ST Lukes hosp., Fountain Hill, PA

Updated: 3:23 AM EDT

Temperature: 72.5 °F Dew Point: 60 °F Humidity: 64% Wind: Calm Pressure: 29.91 in Hourly Precipitation: 0.00 in Heat Index: 76 °F Graphs

Location: Lower Saucon Township, Bethlehem, PA

Updated: 3:23 AM EDT

Temperature: 71.2 °F Dew Point: 60 °F Humidity: 68% Wind: Calm Pressure: 29.68 in Hourly Precipitation: 0.00 in Heat Index: 75 °F Graphs

Location: West Bethlehem, Bethlehem, PA

Updated: 3:23 AM EDT

Temperature: 71.6 °F Dew Point: 60 °F Humidity: 66% Wind: Calm Pressure: 29.90 in Hourly Precipitation: 0.00 in Heat Index: 75 °F Graphs

Location: Emmaus, Emmaus, PA

Updated: 3:08 AM EDT

Temperature: 72.1 °F Dew Point: 64 °F Humidity: 77% Wind: NE at 6.3 mph Pressure: 29.77 in Hourly Precipitation: - Heat Index: 73 °F Graphs

Location: South Mountain, Bethlehem, PA

Updated: 3:08 AM EDT

Temperature: 71.4 °F Dew Point: 60 °F Humidity: 68% Wind: NNW at 1.1 mph Pressure: 29.86 in Hourly Precipitation: - Heat Index: 75 °F Graphs

Location: upper saucon township, Coopersburg, PA

Updated: 3:15 AM EDT

Temperature: 71.8 °F Dew Point: 62 °F Humidity: 71% Wind: North at 3.0 mph Pressure: 29.86 in Hourly Precipitation: 0.00 in Heat Index: 74 °F Graphs

Location: West Allentown, Wescosville, PA

Updated: 3:15 AM EDT

Temperature: 70.3 °F Dew Point: 64 °F Humidity: 82% Wind: Calm Pressure: 29.89 in Hourly Precipitation: 0.00 in Heat Index: 70 °F Graphs

Location: Upper Macungie Twp, Allentown, PA

Updated: 3:16 AM EDT

Temperature: 70.7 °F Dew Point: 63 °F Humidity: 76% Wind: North at 4.2 mph Pressure: 29.80 in Hourly Precipitation: - Heat Index: 73 °F Graphs

Location: Windermerre Park, Allentown, PA

Updated: 3:19 AM EDT

Temperature: 70.1 °F Dew Point: 62 °F Humidity: 77% Wind: Calm Pressure: 29.80 in Hourly Precipitation: 0.00 in Heat Index: 72 °F Graphs

Location: Schnecksville, PA

Updated: 3:20 AM EDT

Temperature: 69.2 °F Dew Point: 63 °F Humidity: 80% Wind: North at 2.0 mph Pressure: 29.89 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Macungie Area Weather, Macungie, PA

Updated: 3:23 AM EDT

Temperature: 70.4 °F Dew Point: 62 °F Humidity: 76% Wind: North at 5.9 mph Pressure: 29.91 in Hourly Precipitation: 0.00 in Heat Index: 72 °F Graphs

Location: Air Products Campus Wx, Allentown, PA

Updated: 3:23 AM EDT

Temperature: 70.9 °F Dew Point: 64 °F Humidity: 78% Wind: Calm Pressure: 29.90 in Hourly Precipitation: 0.00 in Heat Index: 72 °F Graphs

Location: Strawberry Acres, Coplay, PA

Updated: 3:23 AM EDT

Temperature: 69.9 °F Dew Point: 60 °F Humidity: 72% Wind: NNE at 3.0 mph Pressure: 29.79 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: whispering hollow south, Northampton, PA

Updated: 3:23 AM EDT

Temperature: 67.8 °F Dew Point: 22 °F Humidity: 17% Wind: Calm Pressure: 29.16 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Bethlehem Township, Bethlehem, PA

Updated: 3:23 AM EDT

Temperature: 71.4 °F Dew Point: 60 °F Humidity: 67% Wind: Calm Pressure: 29.90 in Hourly Precipitation: 0.00 in Heat Index: 75 °F Graphs

Location: Orefield, PA

Updated: 3:20 AM EDT

Temperature: 67.3 °F Dew Point: 63 °F Humidity: 87% Wind: North at 1.0 mph Pressure: 29.67 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Wassergass, Hellertown, PA

Updated: 3:15 AM EDT

Temperature: 70.6 °F Dew Point: 62 °F Humidity: 73% Wind: West at 3.5 mph Pressure: 29.85 in Hourly Precipitation: 0.00 in Heat Index: 73 °F Graphs

Location: Fogelsville, PA

Updated: 3:23 AM EDT

Temperature: 68.8 °F Dew Point: 62 °F Humidity: 80% Wind: Calm Pressure: 29.69 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Jamesville, Bath, PA

Updated: 3:08 AM EDT

Temperature: 69.3 °F Dew Point: 59 °F Humidity: 69% Wind: NNW at 7.4 mph Pressure: 29.73 in Hourly Precipitation: - Heat Index: - Graphs

Location: Pointe West, Fogelsville, PA

Updated: 3:22 AM EDT

Temperature: 68.0 °F Dew Point: 62 °F Humidity: 82% Wind: Calm Pressure: 29.85 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Upper Milford Twsp, Zionsville, PA

Updated: 3:15 AM EDT

Temperature: 71.0 °F Dew Point: 65 °F Humidity: 81% Wind: SW at 2.0 mph Pressure: 29.89 in Hourly Precipitation: 0.00 in Heat Index: 71 °F Graphs

Location: Breinigsville / Lower Macungie, Mertztown, PA

Updated: 3:15 AM EDT

Temperature: 70.6 °F Dew Point: 63 °F Humidity: 77% Wind: Calm Pressure: 29.86 in Hourly Precipitation: 0.00 in Heat Index: 72 °F Graphs

Location: Kefallonia Drive, Hellertown, PA

Updated: 3:09 AM EDT

Temperature: 69.6 °F Dew Point: 62 °F Humidity: 76% Wind: ESE at 2.7 mph Pressure: 29.81 in Hourly Precipitation: - Heat Index: - Graphs

Location: Springtown, PA, Springtown, PA

Updated: 3:22 AM EDT

Temperature: 71.7 °F Dew Point: 61 °F Humidity: 70% Wind: NE at 2.0 mph Pressure: 29.90 in Hourly Precipitation: 0.00 in Heat Index: 74 °F Graphs

Location: Washington Township, N3DL, Slatington, PA

Updated: 3:23 AM EDT

Temperature: 66.4 °F Dew Point: 60 °F Humidity: 80% Wind: Calm Pressure: 29.95 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Saratoga Chase, Breinigsville, PA

Updated: 3:08 AM EDT

Temperature: 69.6 °F Dew Point: 61 °F Humidity: 75% Wind: ENE at 2.0 mph Pressure: 29.87 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Bath, PA

Updated: 3:23 AM EDT

Temperature: 68.7 °F Dew Point: 60 °F Humidity: 75% Wind: Calm Pressure: 29.86 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Harlem, Barto, PA

Updated: 3:17 AM EDT

Temperature: 69.0 °F Dew Point: 65 °F Humidity: 87% Wind: Calm Pressure: 29.88 in Hourly Precipitation: 0.00 in Heat Index: - Graphs

Location: Mertztown, Mertztown, PA

Updated: 3:10 AM EDT

Temperature: 70.1 °F Dew Point: 63 °F Humidity: 79% Wind: Calm Pressure: 29.92 in Hourly Precipitation: 0.00 in Heat Index: 71 °F Graphs

MSN Maps of:

Temp: Dew Point: Humidity Wind Pressure Hr Precip -

NWS Forecaster Discussion




Area forecast discussion 
National Weather Service Mount Holly New Jersey 
1228 am EDT Thursday Aug 28 2014 


Synopsis... 
a weak cold front will slide across the region tonight, helping 
to keep Hurricane Cristobal well east of the middle Atlantic coast 
into Thursday. High pressure builds in Thursday and Friday, then 
shifts offshore into Saturday. A warm front should lift north 
across the region Saturday, then a frontal boundary may stall to 
our north Sunday and Monday. The next cold front is scheduled to 
arrive Wednesday. 


&& 


Near term /until 6 am this morning/... 
the cold front extended from around Perth Amboy to Trenton to 
Norristown to Coatesville around midnight it will continue to drop 
southward through the remainder of our forecast area before 
daybreak. 


An isolated shower lingered near Hazleton in Pennsylvania. 
Another more substantial shower with isolated lightning was 
located in Morris County, New Jersey around Denville and Boonton. 
There was one additional light shower near Warren township in 
Somerset County. The precipitation should continue to weaken and 
eventually dissipate as it moves southeastward. We will remove the 
mention of precipitation from the forecast based on its very 
limited coverage and on the expectation that it should either 
dissipate or move out of our forecast area by about 130 am. 


A light northwest wind will continue to develop in the wake of 
the cold front and temperatures should drop into the 60s at most 
locations. The sky is expected to clear from northwest to 
southeast with perhaps some clouds lingering over our southeastern 
counties at daybreak. 


&& 


Short term /6 am this morning through 6 am Friday/... 
the cold front is expected to moving south of the Delaware-Maryland-Virginia during 
the morning on Thursday. High pressure will build in from the 
Great Lakes behind the front. The official NHC forecast calls for 
Hurricane Cristobal to be located about 500 miles off the middle- 
Atlantic coast 12z Thursday before accelerating to the east- 
northeast, moving farther out to sea during the day. 


The pressure gradient between the high to our northwest and the 
cold front to our South/Hurricane Cristobal to our east will 
produce a breezy northwest wind 10-15 miles per hour across our area. These 
winds will usher in relatively cool and dry air with the source of 
this Post-frontal air mass from Canada. Forecast maximum temperatures in the 
lm80s for most of the region, except mu70s in the mountains. 


&& 


Long term /Friday through Thursday/... 
the overall synoptic setup is comprised of an upper-level trough 
exiting the northeast Thursday night into Friday, then a short 
wave trough tracking across the northern plains and Midwest will 
build a ridge across the east Friday and into the weekend. This 
ridge may hold for awhile, however additional short waves will 
carve out another upper-level trough that eventually shifts 
eastward across the Midwest and Great Lakes region. An associated 
cold front should arrive toward the end of this time frame, 
although an initial front may stall to our north before retreating 
northward. We used a model blend for Thursday night through 
Saturday, then went with the 12z wpc guidance. Some adjustments 
were then made following additional collaboration with our 
surrounding offices. 


For Thursday night and Friday...an upper-level trough will be 
exiting to our east followed by some ridging. This will push high 
pressure across the northeast and middle Atlantic regions. The center 
of the surface high will probably be located just to our north, 
therefore a northwest to north surface wind should occur. This 
will help advect a drier air mass into the area along with cooler 
air through Friday. However, the surface high should be shifting 
offshore Friday night allowing for a return flow to start becoming 
established. A system moving across the northern plains and 
Midwest will assist in warm air advection developing northbound up the Ohio 
Valley. This should also organize a warm front to our southwest. 


For Saturday and Sunday...the building of an upper-level ridge is 
forecast to occur during this time frame, however short wave 
energy traveling from the Midwest to the Great Lakes region will 
try and flatten it some. Due to the ridge and also surface high 
pressure situated offshore, a southwesterly flow of warm/hot and 
increasingly more humid air will overspread the area. While there 
may be somewhat of a moisture surge as a warm front lifts north 
across the area Saturday, the overall forcing looks weak with much 
of the energy focused closer to the Great Lakes. Therefore, we 
maintained a dry forecast for Saturday. An initial disturbance may 
end up weakening as it traverses a frontal boundary to our north 
and west Sunday as it runs into the northwest flank of the upper- 
level ridge. Despite this, there could be some convection on the 
southeastward flank of this weakening disturbance Sunday. If a Lee 
side trough develops, this could also be the focus for some 
convective development within the large warm sector. Given the 
heat and higher humidity in place, some thunderstorms could be 
locally strong from our western zones and especially west of our 
County Warning Area. This carries lower confidence though due to some uncertainty 
on convective initiation and coverage and the timing of embedded 
features. For now, we carried chance probability of precipitation or less during Sunday. 


For Monday and Tuesday...as an upper-level trough reloads across 
the northern plains and Midwest Monday, a ridge is still near our 
area maintaining a southwesterly flow. There appears to be a 
stalled baroclinic zone though to our north, however as of now 
there is no real strong surface high to push this southward, plus 
the ridging farther south may be strong enough to keep it at Bay. 
However, the model guidance suggests that within a rather warm and 
moist air mass a Lee side trough may be present and even sharpen up 
some. With any subtle short waves tracking around the northwestern 
periphery of the lingering ridge, some convection could develop in 
tandem with the Lee side trough. As a result, we will carry slight 
chance to lower chance probability of precipitation especially inland. There are some timing 
differences in the model guidance, therefore we followed more 
closely to the 12z wpc guidance. 


For Wednesday...an amplifying upper-level trough from the Midwest 
and Great Lakes region should push a cold front into our region. 
While there are some timing differences in the model guidance, we 
did stay closer to wpc guidance. This brings the actual cold front 
into our area later in the day. As heights fall, the front arrives 
and large scale forcing generally arrives, some convection is 
possible. If this occurs during peak heating with enough shear, 
convection could be more organized. Overall, we went rather close 
to the 12z wpc guidance. 


&& 


Aviation /04z Thursday through Monday/... 
the following discussion is for kphl, kpne, kttn, kabe, krdg, 
kilg, kmiv, kacy and surrounding areas. 


VFR conditions are expected through the taf period. Occasionally 
broken ceilings around or above 4000 feet should clear from 
northwest to southeast during the overnight period. A mostly 
clear sky is anticipated for Thursday. 


A light northwest wind will develop overnight. Wind speeds are 
forecast to increase into the 8 to 12 knot range on Thursday with 
gusts near 20 knots, especially in the afternoon. 


Outlook... 
Thursday night and Friday...VFR. Light winds becoming northeast, 
and then southerly Friday. 


Saturday and Sunday...a chance of local fog each early morning, 
otherwise mainly VFR. Some increase in clouds possible Saturday as 
a warm front lifts northward. Some showers and thunderstorms are 
possible Sunday, with a chance for locally sub-VFR conditions. 
South and southeast winds Saturday 5-10 knots, becoming south- 
southwest Sunday. 


Monday...VFR, with the exception of possible brief times of MVFR 
associated with a shower or thunderstorm. Lower confidence 
regarding precipitation coverage. Southwesterly winds generally 
near 10 knots. 


&& 


Marine... 
as of midnight...seas at buoy 44009 are still holding at 4 feet. 
Still believe that swells from Cristobal will affect the New Jersey and Delaware 
coastal waters later tonight and during the day on Thursday. Maximum 
seas are now expected to be around 6 feet. 


Outlook... 
as tropical cyclone Cristobal moves farther away from the area, 
the swells are expected to subside. While 5-foot swells may 
persist a little longer Thursday night, we held off on extending 
the Small Craft Advisory at this time due to some uncertainty. High 
pressure builds in over the weekend before shifting offshore and 
allowing for a return flow into next week. The flow may strengthen 
for a time Sunday into Monday, however overall the conditions are 
anticipated to be below Small Craft Advisory criteria. 


&& 


Rip currents... 
long-period swells from Hurricane Cristobal have been slower to 
reach New Jersey and Delaware beaches compared to wave model guidance. 
However...higher swells have been noted farther south along the 
Atlantic coast and these are still expected to spread northward over 
night and continue on Thursday as Cristobal churns up the waters 
500 miles or so east-southeast of Delaware Bay. The high risk of rip currents 
has therefore been extended through Thursday into Thursday 
evening. 


The media and decision makers can help. All 4 rip current 
fatalities at New Jersey beaches this year were at unguarded locations! 


There isnt much more we can say except that family members and 
friends may think they're strong enough to keep you safe but its 
risky. Like it or not...the water is far more powerful than you 
think. Swimming in the ocean is not swimming in the local pool. 
Its probably more tiring because of long shore currents along the 
beach and the sweeping crashing motion of the waves breaking 
inward and then the outgoing water returning to sea as rip 
currents. 


&& 


Phi watches/warnings/advisories... 
PA...none. 
New Jersey...high rip current risk through this evening for njz014-024>026. 
Delaware...high rip current risk through this evening for dez004. 
Maryland...none. 
Marine...Small Craft Advisory for hazardous seas until 6 PM EDT this 
evening for anz450>455. 


&& 


$$ 


Synopsis...gorse 
near term...iovino 
short term...Klein 
long term...gorse 
aviation...gorse/iovino 
marine...amc/gorse/Klein 
rip currents...amc/drag 












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