Harleysville, PA (19441)

3:43 PM EDT on July 20, 2017 (GMT -0400)
The Heathers | | Change Station
Active Advisory: Heat Advisory, Air Quality Alert

Elev 354 ft 40.27 °N, 75.39 °W | Updated 13 minutes ago

Partly Cloudy
Partly Cloudy
96.8 °F
Feels Like 104 °F
N
2.7
Wind Variable Wind from WNW

Today
High -- | Low -- °F
--% Chance of Precip.
Yesterday
High -- | Low -- °F
Precip. -- in
Pressure 29.95 in
Visibility 8.0 miles
Clouds Few 5000 ft
Heat Index 104 °F
Dew Point 71 °F
Humidity 43%
Rainfall 0.00 in
Snow Depth Not available.
5:48 AM 8:26 PM
Waning Crescent, 10% visible
METAR KPTW 201854Z AUTO 25007KT 8SM FEW050 32/21 A2996 RMK AO2 SLP140 T03220206
Pressure 29.95 in
Visibility 8.0 miles
Clouds Few 5000 ft
Heat Index 104 °F
Dew Point 71 °F
Humidity 43%
Rainfall 0.00 in
Snow Depth Not available.
5:48 AM 8:26 PM
Waning Crescent, 10% visible
METAR KPTW 201854Z AUTO 25007KT 8SM FEW050 32/21 A2996 RMK AO2 SLP140 T03220206

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10-Day Weather Forecast

Almanac

Astronomy

Jul. 20, 2017 Rise Set
Actual Time
Civil Twilight
Nautical Twilight
Astronomical Twilight
Moon
Length of Visible Light
Length of Day
Tomorrow will be .
, % of the Moon is Illuminated

Today's Extremes

State Highs State Lows

Community

WunderPhotos

Category 6

Welcome to Category 6. This is the collective home for Weather Underground's featured writeups by Dr. Jeff Masters (right), Bob Henson (left), Chris Burt, and other regular contributors.

Nearby

Air Quality

  Air Quality AQ Index Pollutant
Not available.

Snow Depth

Station Depth Elevation

Earthquake Activity

City Distance Mag. Time & Date
Minimum magnitude displayed is 2.5.

Coastal Water Temperatures

Place Temperature

Stations

Nearby Weather Stations

Station Location Temp. Windchill Dew Point Humidity Wind Precip. Elev Updated Type
                   

Watches & Warnings

Heat Advisory
Issued: 3:13 PM EDT Jul. 20, 2017 – National Weather Service

... Heat advisory remains in effect until 7 PM EDT this evening...

* heat index values... from 100 to 104 in southeast Pennsylvania
and central New Jersey and 101 to 106 in Delaware, the Eastern
Shore of Maryland, and southern New Jersey.

* Timing... this afternoon into early this evening. For Friday,
heat index values will be in the upper 90s to 104 degrees. These
values fall just under heat advisory criteria.

* Impacts... the heat and humidity may cause heat stress during
outdoor exertion or extended exposure.

Precautionary/preparedness actions...

A heat advisory means that a period of hot temperatures is
expected. The combination of hot temperatures and high humidity
will combine to create a situation in which heat illnesses are
possible. Drink plenty of fluids... stay in an air-conditioned
room... stay out of the sun... and check up on relatives and
neighbors.

Take extra precautions... if you work or spend time outside. When
possible... reschedule strenuous activities to early morning or
evening. Know the signs and symptoms of heat exhaustion and heat
stroke. Wear light weight and loose fitting clothing when
possible and drink plenty of water.

To reduce risk during outdoor work... the occupational safety and
health administration recommends scheduling frequent rest breaks
in shaded or air conditioned environments. Anyone overcome by
heat should be moved to a cool and shaded location. Heat stroke
is an emergency... call 9 1 1.




Air Quality Alert
Issued: 3:45 PM EDT Jul. 19, 2017 – National Weather Service

... Air quality alert is in effect for Thursday July 20...

The Delaware valley regional planning commission has issued
a code Orange air quality alert Thursday for the Philadelphia
Metro area.

A code Orange air quality alert means that air pollution
concentrations within the region may become unhealthy for
sensitive groups. Sensitive groups include children... people
suffering from asthma... heart disease or other lung
diseases... and the elderly. The effects of air pollution can
be minimized by avoiding strenuous activity or exercise outdoors.

For more information on ground-level ozone and fine
particles... visit www.Airnow.Gov.



345 PM EDT Wed Jul 19 2017

... Air quality alert is in effect for Thursday July 20...

The Delaware valley regional planning commission has issued
a code Orange air quality alert Thursday for the Philadelphia
Metro area.

A code Orange air quality alert means that air pollution
concentrations within the region may become unhealthy for
sensitive groups. Sensitive groups include children... people
suffering from asthma... heart disease or other lung
diseases... and the elderly. The effects of air pollution can
be minimized by avoiding strenuous activity or exercise outdoors.

For more information on ground-level ozone and fine
particles... visit www.Airnow.Gov.