Mainland, PA (19451)

6:54 PM EDT on July 20, 2017 (GMT -0400)
Harleysville | | Change Station

Elev 305 ft 40.26 °N, 75.37 °W | Updated 13 seconds ago

Clear
Clear
89.8 °F
Feels Like 95 °F
N
0.0
Wind Variable Wind from WSW
Gusts 0.0 mph

Today
High -- | Low -- °F
--% Chance of Precip.
Yesterday
High -- | Low -- °F
Precip. -- in
Pressure 29.90 in
Visibility 10.0 miles
Clouds Clear
Heat Index 95 °F
Dew Point 69 °F
Humidity 51%
Rainfall 0.00 in
Snow Depth Not available.
5:48 AM 8:26 PM
Waning Crescent, 9% visible
METAR KLOM 202235Z AUTO 24007KT 220V280 10SM CLR 31/22 A2990 RMK AO1
Pressure 29.90 in
Visibility 10.0 miles
Clouds Clear
Heat Index 95 °F
Dew Point 69 °F
Humidity 51%
Rainfall 0.00 in
Snow Depth Not available.
5:48 AM 8:26 PM
Waning Crescent, 9% visible
METAR KLOM 202235Z AUTO 24007KT 220V280 10SM CLR 31/22 A2990 RMK AO1

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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

Severe Thunderstorm Watch
Issued: 6:43 PM EDT Jul. 20, 2017 – National Weather Service

Severe Thunderstorm Watch 426 remains in effect until 1000 PM EDT

PA
. Pennsylvania counties included are

Berks Bucks Carbon
Lehigh Monroe Montgomery
Northampton Philadelphia




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.