* Effective this Tuesday afternoon and evening from 335 PM until 1000 PM EDT.
* Primary threats include... Scattered damaging wind gusts to 70 mph possible Isolated large hail events to 1 inch in diameter possible
SUMMARY...Widely scattered thunderstorms are expected to develop this afternoon in a hot and humid air mass. Sufficiently strong westerly flow aloft will promote a risk of locally damaging wind gusts in the strongest cells.
The severe thunderstorm watch area is approximately along and 65 statute miles east and west of a line from 15 miles west southwest of Patuxent River MD to 55 miles east northeast of Wilkesbarre PA. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU8).
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.
EXCESSIVE HEAT WARNING NOW IN EFFECT UNTIL 8 PM EDT WEDNESDAY...
* WHAT...Dangerously hot conditions with heat index values up to 109.
* WHERE...Portions of northern Delaware, central, northern, and
southern New Jersey, and southeast Pennsylvania.
* WHEN...Until 8 PM EDT Wednesday.
* 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.
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.
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.
EXCESSIVE HEAT WARNING IN EFFECT UNTIL 6 AM EDT WEDNESDAY
Monday Sunny and hot, with a high near 98. Heat index values as high as 105. West wind 5 to 10 mph.
Monday Night A chance of showers and thunderstorms, mainly before 7pm. Some of the storms could produce heavy rainfall. Partly cloudy, with a low around 76
EXCESSIVE HEAT WARNING IN EFFECT UNTIL 6 AM EDT WEDNESDAY...
...EXCESSIVE HEAT WATCH NOW IN EFFECT FROM WEDNESDAY MORNING THROUGH
WEDNESDAY EVENING...
* WHAT...For the Excessive Heat Warning, dangerously hot conditions
with heat index values ranging from 103 to 108 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 Excessive Heat Warning, until 6 AM EDT Wednesday.
For the Excessive Heat Watch, from Wednesday morning through
Wednesday 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.
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.
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.
HEAT ADVISORY IN EFFECT FROM 10 AM SUNDAY TO 6 AM EDT MONDAY...
...EXCESSIVE HEAT WATCH IN EFFECT FROM MONDAY MORNING THROUGH
TUESDAY EVENING...
* WHAT...For the Heat Advisory, heat index values up to 100 degrees
expected. For the Excessive Heat Watch, dangerously hot conditions
with heat index values up to 108 degrees possible.
* WHERE...Portions of northwest New Jersey and east central and
southeast Pennsylvania.
* WHEN...For the Heat Advisory, from 10 AM Sunday to 6 AM EDT
Monday. For the Excessive Heat Watch, from Monday morning through
Tuesday 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.
FLOOD WATCH REMAINS IN EFFECT THROUGH SATURDAY AFTERNOON...
* WHAT...Flash 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 southeast Pennsylvania, including the
following areas, Delaware, Eastern Chester, Eastern Montgomery,
Lower Bucks, Philadelphia, Upper Bucks, Western Chester and
Western Montgomery.
* WHEN...Through Saturday 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. Low-water crossings may be
flooded.
* ADDITIONAL DETAILS...
- Widespread showers and thunderstorms combined with tropical
moisture will result in areas of heavy rainfall across the
watch area through Saturday. Rainfall rates may exceed 1 to 2
inches per hour. Forecast rainfall amounts range from about 1
to 3 inches, however, localized amounts near 5 inches are
possible.
- http://www.weather.gov/safety/flood
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be alert for possible Flood
Warnings. Those living in areas prone to flooding should be prepared
to take action should flooding develop.
A stationary front will plague the region into Saturday with several waves of heavy showers and thunderstorms expected. The overall threat for severe weather is low, but heavy rain could cause some localized flash flooding, especially in urbanized areas.
A Flood Watch has been issued for the Eastern Shore of Maryland, up through the I-95 corridor, and into northern New Jersey.
Although it has been hot and dry across much of the forecast area, the flood threat through tomorrow will come from slow moving storms and the redevelopment of storms over the same area.
Mainstem river flooding is not expected, but smaller and quicker responding streams could leave their banks.
By the time the rain ends tomorrow, there are signals suggesting that localized rainfall amounts near 5.00 inches could occur.
If you're on the road and come across flooding, turn around. Most flooding injuries and fatalities occur in vehicles. Move to higher ground.
* WHAT...Flooding caused by excessive rainfall is possible.
* WHEN...From Friday morning through Saturday 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. Low-water crossings may be flooded.
* ADDITIONAL DETAILS... - Widespread showers and thunderstorms combined with tropical moisture will result in areas of heavy rainfall across the watch area from Friday morning through Saturday. Rainfall rates may exceed 1 to 2 inches per hour. Forecast rainfall amounts range from about 1 to 2 inches, however localized amounts near 3 to 4 inches are possible.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.
