Saturday, July 25, 2009
Monday, July 20, 2009
Not much change is expected for the rest of the month with the upper ridge expected to persist over BC (see attached 500 mb GFS prog for Friday) maintaining warm temperatures out west with near to below temperatures over the eastern Prairies. Although the absence of hot humid weather is a disappointment for beach and cottage goers in southern MB, the weather has been comfortable for most residents with the benefit of little or no need of air conditioning. As of July 19th, the mean monthly temperature in Winnipeg was 15.8C, putting it on pace for one of the coolest July's on record in the city since records began in 1872. The top two coolest Julys in Winnipeg were 1884 (15.4C) and 1992 (15.9C) Both those years followed major volcanic eruptions the previous summer (Krakatoa in 1883, and Pinatubo in 1991)
Thursday, July 16, 2009
It’s a cool wet July morning out there with overcast skies, rain and temperatures only around 9C.. making it feel more like fall than mid summer. A low pressure system over northern
Wednesday, July 15, 2009
Sunday, July 12, 2009
more showers expected Wednesday across southern MB as the storm system moves east.
Thursday, July 09, 2009
Tuesday, July 07, 2009
Monday, July 06, 2009
Also note that jpg images from my site now have a “no_cache” added to the directory.. so if you have any links to Rob’s Obs .jpg images, be sure to add /no_cache after /robsobs to get the valid images.
Thursday, July 02, 2009
After an unseasonably cool first half of the month, temperatures finally warmed to above normal values for the latter half of June as summerlike weather finally made an appearance over southern Manitoba. The warm weather however was not enough to offset the cool start, and as a result, June finished almost 1.5C below normal, with a monthly mean temperature of 15.6C at Winnipeg airport. This made June the 7th consecutive month with mean temperatures below normal (December 2008 to June 2009). Although significant this is not record breaking. Since 1971, there have been four other periods with 7 consecutive months of below normal monthly mean temperatures in Winnipeg, namely...
November 1973 to May 1974
June 1985 to December 1985
May 1993 to November 1993
November 1996 to May 1997
There were also two periods with 8 consecutive months below normal
November 1978 to June 1979
October 1995 to May 1996
The month was marked by an exceptionally late freeze on June 6th.. with a record low of -4.6C at Winnipeg airport.. the coldest June temperature ever at the airport since 1938, and the second coldest June temperature in Winnipeg since June 1 1888 (-6.1C) Downtown Winnipeg escaped the freeze with no frost reported at the Forks weather station.
A strong storm system on June 26-27th brought heavy rainfall and strong winds to southeast Manitoba with over 100 mm of rain in areas east and southeast of Lake Winnipeg. This system brought heavy rainfall to eastern sections of Winnipeg with 75 mm reported while western areas, including the airport, had 35 mm. Other than this system precipitation was generally light in June with a lack of showers and thunderstorms. As a result, precipitation varied greatly across the city in June. Whereas the Airport only had 61.5 mm, the downtown station at The Forks had 82.8 mm and according to the rain gauge network operated by the City of Winnipeg, there was over 90 mm in the many areas of Winnipeg east of the Red River. Normal June rainfall in Winnipeg is 90 mm.