Weather Alerts Archives - Page 3 of 19 - Greater Philadelphia Severe Weather

Jul 07

HEAT ADVISORY IN EFFECT UNTIL 8PM TUESDAY

HEAT ADVISORY IN EFFECT FROM 10 AM MONDAY TO 8 PM EDT TUESDAY…

WHAT…Heat index values up to 104 expected.
WHERE…Portions of northern Delaware, most of New Jersey, and southeast Pennsylvania.
WHEN…From 10 AM Monday to 8 PM EDT Tuesday.
IMPACTS…Hot temperatures and high humidity may cause heat illnesses.
ADDITIONAL DETAILS…Peak heat indices on Wednesday are forecast to reach or exceed 100 degrees, and therefore an extension of this heat advisory into Wednesday is probable.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

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 when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.

Jun 28

HEAT ADVISORY IN EFFECT FROM 11 AM TO 7 PM EDT SUNDAY…

WHAT…Heat index values up to 102 expected.
WHERE…Portions of northern Delaware, central and southern New Jersey, and southeast Pennsylvania.
WHEN…From 11 AM to 7 PM EDT Sunday.
IMPACTS…Hot temperatures and high humidity may cause heat illnesses.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

Monitor the latest forecasts and warnings for update

Jun 26

Severe Thunderstorm Watch Until Midnight

Severe Thunderstorm Watch for portions of Connecticut Much of New Jersey Southeast New York and Long Island Eastern Pennsylvania Coastal Waters

Effective this Wednesday night from 615 PM until Midnight EDT.
Primary threats include… Scattered damaging wind gusts to 65 mph possible

SUMMARY…A band of strong to severe thunderstorms is forecast to move east into and across much of the Watch area this evening. A risk for strong to severe gusts (50-65 mph) capable of wind damage will potentially accompany the stronger thunderstorms. An isolated threat for large hail (1 to 1.5 inches in diameter) may exist with any discrete and intense thunderstorms.

The severe thunderstorm watch area is approximately along and 75 statute miles east and west of a line from 15 miles west northwest of Windsor Locks CT to 10 miles southwest of Philadelphia PA. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU9).

PRECAUTIONARY/PREPAREDNESS ACTIONS…

REMEMBER…A Severe Thunderstorm Watch means conditions are favorable for severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. Severe thunderstorms can and occasionally do produce tornadoes.

Jun 25

HEAT ADVISORY IN EFFECT 9 am to 9pm WEDNESDAY

…HEAT ADVISORY IN EFFECT FROM 9 AM TO 9 PM EDT WEDNESDAY…

WHAT…Heat index values up to 100 expected.
WHERE…Portions of northern Delaware, central, northern, and southern New Jersey, and southeast Pennsylvania.
WHEN…From 9 AM to 9 PM EDT Wednesday.
IMPACTS…Hot temperatures and high humidity may cause heat illnesses.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

Monitor the latest forecasts and warnings for updates.

Jun 19

HEAT ADVISORY NOW IN EFFECT UNTIL 6 AM EDT SATURDAY……EXCESSIVE HEAT WATCH NOW IN EFFECT FROM SATURDAY MORNING THROUGH SUNDAY EVENING…

WHAT…For the Heat Advisory, heat index values ranging from 95 to 100 degrees. For the Excessive Heat Watch, dangerously hot conditions with heat index values ranging from 100 to 105 degrees possible.
WHERE…Portions of northern Delaware, central, northern, and southern New Jersey, and southeast Pennsylvania.
WHEN…For the Heat Advisory, until 6 AM EDT Saturday. For the Heat Advisory, the hottest temperatures and heat indices are forecast to occur on Friday. For the Excessive Heat Watch, from Saturday morning through Sunday evening.
IMPACTS…Heat related illnesses increase significantly during extreme heat and high humidity events.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes.

Monitor the latest forecasts and warnings for updates.

Jun 16

HEAT ADVISORY NOW IN EFFECT FROM 10 AM TUESDAY TO 6 AM EDT WEDNESDAY……EXCESSIVE HEAT WATCH IN EFFECT FROM WEDNESDAY MORNING THROUGH SATURDAY EVENING

WHAT…For the Heat Advisory, heat index values up to 98 expected. For the Excessive Heat Watch, dangerously hot conditions with heat index values of 100 to 105 possible.
WHERE…Portions of northern Delaware, central, northern, and southern New Jersey, and southeast Pennsylvania.
WHEN…For the Heat Advisory, from 10 AM Tuesday to 6 AM EDT Wednesday. For the Excessive Heat Watch, from Wednesday morning through Saturday evening.
IMPACTS…Heat related illnesses increase significantly during extreme heat and high humidity events.
ADDITIONAL DETAILS…A prolonged period of excessive heat with high temperatures in the 90s is expected through this week. The heat is forecast to worsen as the week goes on, with it peaking late in the week and into the weekend. These early season heat events combined with the prolonged nature of it may cause an increase in heat related impacts such heat illnesses or on heat sensitive infrastructure.

PRECAUTIONARY/PREPAREDNESS ACTIONS…

Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.

Monitor the latest forecasts and warnings for updates.

Apr 25

FREEZE WARNING in effect…..


FREEZE WARNING IN EFFECT FROM 2 AM TO 9 AM EDT FRIDAY...

* WHAT...Sub-freezing temperatures as low as 29 expected.

* WHERE...Portions of central, northern, northwest and southern
  New Jersey and east central and southeast Pennsylvania.

* WHEN...From 2 AM to 9 AM EDT Friday.

* IMPACTS...Frost and freeze conditions will kill crops and
  other sensitive vegetation.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

Apr 21

FROST ADVISORY In Effect until 9am

...FROST ADVISORY IN EFFECT FROM 2 AM TO 9 AM EDT MONDAY...

* WHAT...Temperatures as low as 35 will result in frost
  formation.

* WHERE...In New Jersey, Somerset. In Pennsylvania, Delaware,
  Eastern Montgomery and Lower Bucks.

* WHEN...From 2 AM to 9 AM EDT Monday.

* IMPACTS...Frost could kill sensitive outdoor vegetation if
  left uncovered.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Take steps now to protect tender plants from the cold.

Apr 07

NASA Launches and Eclipse

ECLIPSE INFO
In Philadelphia, the eclipse will occur from 2:08 p.m. until 4:35 p.m., peaking at 3:23 p.m.

A solar eclipse occurs when the moon comes between the earth and the sun. During a total solar eclipse, the moon blocks the light coming in from the sun and appears to cover up the sun entirely. This will give viewers a glimpse of the sun’s outer atmosphere, known as the corona.

NASA WALLOPS LAUNCHES MONDAY

During the Eclipse today you will be able to see 3 rockets launched from Wallops.

Wallops Flight Facility on Virginia’s Eastern Shore will launch 3 rockets during the solar eclipse to study how Earth’s upper atmosphere is affected when sunlight dims for a moment over part of the planet.

Those rockets will launch at three different times — 45 minutes before the total solar eclipse, during it, and then 45 minutes after the peak local eclipse, and they are expected to reach a maximum altitude of 260 miles. The launch window opens at 2:40 p.m. EDT, with targeted launch times for the three rockets being 2:40 p.m., 3:20 p.m. and 4:05 p.m., but those times are subject to change.

NASA said the three launches are important to gather data on how the sun’s disappearance affects the ionosphere, “creating disturbances that have the potential to interfere with our communications.”

Apr 03

Flood Watch and Coast Flood Watch in effect

COASTAL FLOOD ADVISORY IN EFFECT UNTIL 1 PM EDT THIS AFTERNOON

* WHAT…Up to one foot of inundation above ground level in low- lying areas near shorelines and tidal waterways.

* WHERE…In New Jersey, Gloucester, Camden and Northwestern Burlington. In Pennsylvania, Delaware, Philadelphia and Lower Bucks.

* WHEN…Until 1 PM EDT this afternoon.

* IMPACTS…At this level, flooding begins on the most vulnerable roads along tidal waterways. Some partial or full road closures are possible.

* ADDITIONAL DETAILS…Additional minor flooding is forecast with the high tide Thursday morning, and another advisory may be issued for that later today.

PRECAUTIONARY/PREPAREDNESS ACTIONS – If travel is required, allow extra time as some roads may be closed. Do not drive around barricades or through water of unknown depth. Take the necessary actions to protect flood-prone property.

Flood Watch In Effect Until Thursday Afternoon:

FLOOD WATCH REMAINS IN EFFECT THROUGH THURSDAY AFTERNOON…

* WHAT…Flooding caused by excessive rainfall continues to be possible.

* WHERE…Portions of northern Delaware, including the following area, New Castle, New Jersey, including the following areas, Camden, Gloucester, Hunterdon, Mercer, Middlesex, Morris, Northwestern Burlington, Salem, Somerset, Sussex, Warren and Western Monmouth, and Pennsylvania, including the following areas, Berks, Carbon, Delaware, Eastern Chester, Eastern Montgomery, Lehigh, Lower Bucks, Monroe, Northampton, Philadelphia, Upper Bucks, Western Chester and Western Montgomery.

* WHEN…Through Thursday afternoon. * IMPACTS…Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Creeks and streams may rise out of their banks. Flooding may occur in poor drainage and urban areas.

* ADDITIONAL DETAILS– Additional rainfall amounts between 1.0 to 3.0 inches are expected across the Watch area into Thursday. About two dozen of our river points are forecast to approach flood stage today into Thursday, with several exceeding flood stage. The rain will be heavy at times, with hourly rates reaching or exceeding an inch, with the more widespread and heaviest rain expected to fall this afternoon and early this evening. During the higher rainfall rates, local flash flooding cannot be ruled out. Excessive runoff may continue to cause rivers, creeks, and streams to rise through the end of the week even when the rain has ended.