segunda-feira, agosto 03, 2009

Frio e chuva nos EUA e no Canadá

Até agora, o Verão nos Estados Unidos da América e no Canadá tem sido o que os franceses chamam um “été pourri” (frio, húmido e ventoso). Os anticiclones móveis polares saídos do Árctico com trajectória atlântica não têm tido descanso.

O mesmo está a acontecer com os AMP da trajectória escandinava. Daí que o estado do tempo no centro e no norte da Europa tenha sido parecido com o dos EUA e do Canadá, embora menos agressivo.

Como quanto mais fortes são as massas de ar anticiclónicas mais cavadas são as depressões, o retorno destas depressões cavadas com massas de ar quente para certas regiões do Árctico tem conduzido a uma mais rápida fusão do mar gelado.

Voltando aos EUA e Canadá, recordes de temperaturas diárias são batidos no sentido da baixa. The coldest July on record é o que mais se lê nos noticiários do estado do tempo na América do Norte. No entanto, também surgiram ondas de calor dispersas e curtas.

A título de exemplo seguem-se algumas notícias (no EUA utiliza-se ºF em vez de ºC):

Summer weather stats are chilling
Akron Beacon JournalThrough
Thursday, the area's average daily temperature is 67.2 degrees, 4.5 degrees below normal. The coldest July on record in the Akron-Canton area via ...

Posted Comment Recommend
USA Today
Below average temperatures are expected for most areas east of the Continental Divide beginning on Tuesday, with some record lows possible in the Midwest, ...

Cold July keeps people away from the pool
KTVO
The National Weather Service in Kansas City/Pleasant Hill, Missouri is reporting the 6th coldest July on record so far. We went to the Aquatic Center in ...

Coolest July ever for Illinois expected
Illinois Farm Bureau
The coldest July monthly maximum temperature since 1948 was 88 in Peoria and Springfield, and 89 in Lincoln, all set in 2000. ...

Week will offer plenty of chances for more rain
Evansville Courier & Press
So far the average temperature for the month (which takes into account the high and low temperatures each day) is 73.1 degrees, five degrees below the ...

Record lows, global cooling across US
OneNewsNow
He blames that on a recent trend of global cooling that has been in place for more than seven years. "The reason Climate Depot is covering this is because ...

RI sets record for wettest July
Providence Journal - Providence,RI,USA
The coldest July on record was 1914, with an average temperature of 68 degrees. Second was 1923, with an average of 68.5; we're right behind that so far, ...

The Record, Hackensack, NJ, Kevin DeMarrais Column
istockAnalyst.com (press release) - Salem,OR,USA
The average temperature this month is 71.7 degrees, 4.6 degrees below average, which means we're headed for the coldest July in 121 years, ...

Too cool?
Times-Mail (subscription) - Bedford,IN,USA
The National Weather Service in Indianapolis and Skyeye Weather in Cincinnati report the area is on track for a record-cold July. The weather has been great ...

July on track to be record cool
Fremont News Messenger - Fremont,OH,USA
The service forecasts another cold front and rain for the weekend, temperatures are supposed to warm up to the'70s and '80s next week, he said. ...

It's been a cool summer, but not one for the record books
Oshkosh Northwestern - Oshkosh,WI,USA
It's been a pretty cool summer as in temperatures. This may come as a surprise, but this summer it is not even close to the coldest on record in Oshkosh ...

Showers, storms possible Saturday, but nothing like Friday's
Capital Times - Madison,Wisconsin,USA
Clouds will decrease tonight to clear to partly cloudy skies and a low temperature right around 60 degrees. Sunday will bring more of the same: partly ...

Redding weather: 100-degree-plus afternoon just a warm up for next ...
Record-Searchlight - Redding,CA,USA
We still really can't speak of a heat wave with top temperatures like these. The average high temperature in Redding on this date is 100 degrees. The record ...

Weather History - July 26: Record Heat, Cold, Severe Storms, Rain ...
Examiner.com - USA
Canadian high pressure brought record cold temperatures to parts of the Great Lakes region. Record lows included: Madison, WI: 46°, Muskegon, MI: 46°, ...

New record for July rainfall in RI
Turn to 10.com
July also may turn out to be one of the coldest on record. The coolest average temperature in July for Rhode Island was 68 degrees in 1914. ...

So where's that global cooling alert?
Globe and Mail - Canada
Not a furrowed brow among the lot over the consideration that, contrary to the visions of Al Gore and David Suzuki or NASA's own anti-global warming ...

July '09 could be coldest on record
Dayton Daily News - Dayton,OH,USA
The lowest average monthly temperature on record for July was 69.9 degrees in 1984. The National Weather Service's records date back to 1893. ...

Rain, cold and ice top Canada's stories
Globe and Mail - Canada
14 made Edmonton colder than the North Pole, while Key Lake, Sask., recorded the coldest temperature in the country at –42. Even British Columbia was not ...

This could end up being the coldest July on record
Youngstown Vindicator
There have been no days in which the temperature hit at least 90 degrees. The highest temperature for the month is 86 degrees on July 16. ...

Warmest seas on record
Sydney Morning Herald
The combined land and sea temperature was the second warmest on record, behind 2005. The US agency is one of three international groups that supply data to ...

This July One of the Coldest on Record
90.3 WCPN ideastream®
The National Weather Service reports this July is one of the coldest on record. Meterologist Jeffrey Seitz says the unseasonably cool temperatures this ...

Heat hangs on, still not record
Press-Enterprise
In July 2006, Riverside experienced 17 days of temperature over 100 degrees, with many of them above 110 degrees, said a study by the California Nevada ...

Summer of our discontent: Coldest, soggiest July in 17 years
Ottawa Citizen
According to Environment Canada, this month is shaping up to be the second-worst July on record after 1992, when the average daily temperature was 17.9 C. ...