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Unusual
clockwise storm system moving across United States
15
July, 2013
An
unusual low pressure system moving in backward direction is causing
severe thunderstorms and rainfall in the dry areas in Oklahoma and
Texas, US. What is highly unusual for this system is that it moves
from east to west or clockwise. Weather systems in the Northern
Hemisphere topically moves counterclockwise or from west to east.
This
is a pretty rare event, having a transcontinental system crossed the
entire United States from east to west during any time of the year.
Interior US can sometimes catch ex-tropical systems from the Gulf of
Mexico but a system developing and moving from the Northeastern USA
to Mexico is extremely rare.
GOES
Eastern Conus Sector Infrared satellite imagery acquired at 04:45 UTC
on July 15, 2013 (Credit: NOAA/GOES)
A
low pressure system started in the eastern United States, pushed
westward under a ridge of high pressure building in to the north and
east. Severe storms, tornadoes, hail, and damaging winds are expected
to affect Texas, New Mexico, and parts of Arizona through the next
few days. Showers and thunderstorms with locally heavy rainfall
already affecting parts of the Southeast and along the Gulf Coast as
the upper low continues to track southwestward. This system will
bring drought relief but also the high risk for flooding in the
region.
GOES
East Infrared Ch2 satellite image acquired at 5:15 UTC on July 15,
2013 (Credit: NOAA/GOES)
GOES
IR satellite image and jetstream forecast for July 15, 2013 (Credit:
NOAA/GOES/SMC-CMC)
This
is the second unusual weather pattern in July after an area of low
pressure in the upper atmosphere got trapped over the South and
brought downpours and thunderstorms that caused flooding from the
Gulf Coast to the Appalachians and Ohio Valley on July 4, 2013.
See
also - Retrograde Low Makes Rush Against Feeble Jet Stream Toward Desert Southwest.
Heat
Alerts Throughout Northeast as Heat Wave Begins
16
July, 2013
Power
companies and state officials are preparing for what could be the
hottest temperatures of the summer, so far, in the Northeast.
"Early
morning lows will only 'cool' into the upper 70s or even low 80s in
New York, Philadelphia and Washington, D.C.," said weather.com
Senior Meteorologist Jon Erdman. "The lack of a break in the
heat in the evening and overnight has been cited as a significant
contributor to heat deaths."
The
heat may continue through Friday and possibly into Saturday.
"If
there is a small silver lining in this heat wave, we're not expecting
triple-digit heat in most locations," said weather.com Senior
Meteorologist Jon Erdman. "It could be a lot worse, as far as
heat waves are concerned."
NEW
YORK
The
National Weather Service has issued a heat advisory for New York
City. It will be in effect until midnight Tuesday.
Mayor
Michael Bloomberg, along with the city's Office of Emergency
Management (OEM), is reminding everyone that more than 400 cooling
centers are open for people who need to use them.
"It's
going to be very hot and humid this week. The weather can be
dangerous, especially for those without air conditioning, the elderly
and those with chronic health conditions," Bloomberg said.
Families
can call 311 or check nyc.gov to locate the nearest cooling center.
Con
Edison says it's prepared for possible power outages and will have
extra cress on call for the duration of the heat wave.
CONNECTICUT
Cooling
centers to open in several communities.
Another
concern is mosquitoes will thrive in the heat, opening the door for
more cases of West Nile Virus.
"Unfortunately,
the weather conditions we're having, with high heat, high humidity
and occasional rain, replenish these sites," state entomologist
Dr. Ted Andreadis told the Hartford Courant.
PENNSYLVANIA
Heat
warnings and advisories are in effect across much of eastern
Pennsylvania.
An
excessive heat warning is in effect for Philadelphia and surrounding
counties until Friday at 8 p.m. EDT.
MARYLAND
Health
officials declared a Code Red Heat Alert Tuesday. It will last
through at least Friday.
Cooling
centers will be open Tuesday through Friday from 9 a.m. to 7 p.m.
throughout the city. Find the cooling center nearest you at.
NEW
ENGLAND
The
region's power grid operator, ISO-New England, says demand for
electricity could near a seven-year record as a residents cop with a
weeklong heat wave.
ISO-New
England says it has enough power to meet demand but is prepared to
ask for emergency electricity from other regions or ask businesses to
reduce power use.
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