Wednesday, 2 August 2017

Monthly Summaries

I will now be posting a monthly summary at the end of every month on my record books website. The link is below:

Please feel free to leave comments and suggestions in the comments section here or in the record books website.


Wednesday, 30 November 2016

Warmest November & 2nd Warmest Fall on Record Shatter Multiple Records in Winnipeg

With an average mean temperature of 3.1°C, November 2016 goes down as the warmest on record since 1872. This shattered the old record of 1.3°C in 1899 and 1923 by 1.8°C! The last time we broke a monthly record by this margin was in January 2006 when an average mean temperature of -7.4°C broke the old record of -10.6°C in 1944 (record margin of 3.2°C!).

Below is a full list of records broken during our warmest November on record this year in Winnipeg.

Warmest November on Record in Winnipeg, Manitoba (2016)

Average mean temperature 3.1°C (previous record: 1.3°C in 1899 and 1923) (breaks old record by 1.8°C!)

Average high temperature 7.2°C (previous record: 7.1°C in 2009)

Average low temperature -1.0°C (previous record: -3.2°C in 1923) (breaks old record by 2.2°C!)

2nd Warmest Fall on Record (2016)
Average mean temperature 8.0°C  (warmest was 1963 with average of 8.6°C and 2016 beats 7.9°C in 1931)
Average high temperature  12.8°C  (tied with 1931 and 2009 for 4th warmest)
Average low temperature  3.3°C   (warmest on record, beating 2.9°C in 1931)

Most ''Humid'' November and Fall on Record (2016)
November average dewpoint  0.3°C   (breaks old record by 3.2°C (-2.9°C in 2015))
Fall average dewpoint  4.4°C (breaks old record of 3.6°C in 2009)

Daily Temperature Records (6)

Nov 6:         16.7°C high max – Tied with 1975

Nov 6:          7.4°C high min –   Old 5.6°C in 1906 and 1922 – Also 4th highest on record in November

Nov 9:         18.8°C high max – Old 14.4°C in 1923 – Also latest date to reach 18°C on record

Nov 9:          4.8°C high min –   Old 2.8°C in 1969

Nov 12:       13.6°C high max – Old 13.2°C in 1981

Nov 24:        0.1°C high min –   Old 0.0°C in 1988

Daily Dewpoint Records (11)

Nov 4:          9.7°C high max –  Old 9.5°C in 1981

Nov 5:          2.2°C high min –   Old 1.7°C in 1956

Nov 6:         12.3°C high max – Old 9.4°C in 2000 – Also highest dewpoint on record in November

                                                                                   Old 11.1°C on Nov 5, 1956

Nov 6:         4.9°C high min –    Old 1.4°C in 1977 – Also 3rd highest on record in November

Nov 7:         10.8°C high max – Old 10.4°C in 1977 – Also 3rd highest on record in November

Nov 9:         7.7°C high max –   Old 6.1°C in 2010

Nov 23:      -0.4°C high min –   Old -1.5°C in 2001

Nov 24:      -0.2°C high min –   Old -0.7°C in 1988

Nov 28:      -1.0°C high min –   Old -1.1°C in 1998

Nov 29:       3.4°C high max –  Old 2.1°C in 1998

Nov 29:      -1.5°C high min –   Old -2.3°C in 1987

Other records

Nov 22:    Latest date to record first measurable snowfall of the season – Old Nov 21, 1963

Apr 11 to Nov 21 – 225-day period without measurable snowfall – 3rd longest snow-free period on record
10 days above 10°C - tied with 1981 and 2009 for 2nd most (most was 11 days in 1904)
Streak of 7 days above 10°C - tied with 2009 for 2nd longest (longest was 8 days from Nov 2 to 9, 1963)
  • Only 5 days dipped below -5°C, breaking the old record of 7 days in 1899.
  • Only one day dipped below -10°C, tied with 1912, 1923, 1981 and 2001 for the least on record.
  • Only 18 days dipped below freezing, breaking the old record of 20 days set in 2015. Normal is 28 days.
  • 28 days exceeded the freezing mark, tied with 2009 for 2nd most. Most was 29 days in 1899.
  • 4 days exceeded 15°C, tied with 1903 and 1981 for most on record.

Saturday, 14 May 2016

April - First Colder Than Normal Month Since August

Snow April 1 in Winnipeg
It was a very cold start to April this year with frequent snowfall and consistently below normal temperatures up to the 12th. The cold conditions were a slap in the face considering the fact it was extremely warm, at times record warm, in Alberta and Saskatchewan. The harshest day was April 2nd. The high was a measly -6.4°C, not quite breaking the record low maximum of -13.3°C in 1954. Some light snow fell in the afternoon as well. This was in sharp contrast to out west where widespread record warmth occurred. Regina reached a record 22.3°C, breaking the old record of 21.8°C in 1991. This was a 28.7°C spread between Winnipeg and Regina on the same day! Parts of southern Alberta also reached the mid to high twenties in the first half of April, all while most of Manitoba was stuck in a cold pattern.

Temperatures finally warmed by mid month with the first 20°C of the year recorded in parts of Winnipeg on April 14. The airport didn't reach its first 20°C until April 20. Just as temperatures finally began to warm up mid month however, a 3-day rainstorm drenched southern Manitoba from the 15th to 17th as a strong low pressure system moved in from the US, pumping significant amounts of moisture from the south. A general 25 to 60 mm fell in the Red River Valley with the highest amounts close to the US border. Generally 35 to 45 mm fell in Winnipeg specifically. Southwestern Manitoba even received some more snow with the system with the highest amounts in Riding Mountain where an estimated 15 cm fell on the 15th.

Maple tree budding April 25 in Winnipeg
Another system brought 5 to 10 mm of rain along the US border on April 24, bringing monthly totals over 60 mm in some locations including 62.1 mm in Emerson.

Other than some ice pellets in the evening on the 23rd, the remainder of the month was quiet and seasonal.

Overall, April averaged 2.8°C in Winnipeg, 1.7°C below normal and the first colder than normal month since August. This ends a 7-month streak of warmer than normal months. April was much warmer out west as mentioned. Calgary averaged 8.8°C, the second warmest April on record. This follows a 3rd warmest March and 2nd warmest February. The west has been on a serious warm streak this year.

Thursday, 14 April 2016

March Brought Another Early Spring to Southern Manitoba

For the second year in a row and for the fourth time in the last seven years, March brought a very early spring to southern Manitoba.

The month started out cold with lows in the -20's on the first three days, but spring-like temperatures arrived just a couple days later and lasted the remainder of the month. In fact, after March 4 only four days failed to exceed the freezing mark in Winnipeg. In the end, the month averaged -2.0°C at Winnipeg Int'l Airport, 3.8°C above normal and the 12th warmest March on record since 1872.

Winnipeg on March 11
Temperatures early month were warmest where there was little to no snow cover. Extreme southwestern Manitoba and the Morden-Winkler area already reached double digit highs on March 5 and 6. After a brief cool down (which still featured warmer than normal temperatures), record warm temperatures spread throughout the remainder of southern Manitoba by March 10 and 11 with widespread double digit highs lasting until March 14. Winnipeg reached 12.2°C on March 12, breaking the old record of 9.7°C in 2012. A high of 13.1°C two days later narrowly missed the old record of 13.2°C set just last year. It was warmer to the south and west. Morden reached its highest temperature for so early in the year three times with record highs of 16.0°C on the 11th, 16.2°C on the 13th and 18.5°C on the 14th. The high of 18.5°C on the 14th broke the old record of 18.3°C set just last year. Prior to 2015, the old record for the day was 11.2°C in 2012. It is mind boggling to think a record could be broken by such a large margin two years in a row. This highlights how unusually early warm temperatures have been arriving in recent years.

In Brandon, four record highs were reached and one was tied during the warm spell. A high of 17.9°C on the 15th not only broke the daily record of 14.9°C in 2012 by a 3°C margin but was also the warmest temperature for so early in the year since 1890. Melita took top honours with a high of 20.5°C on March 14, the earliest high over 20°C on record in Manitoba. The previous earliest 20°C was on March 16, 2012 when several locations reached the low 20's.

Thanks to the warmth, everything was early this year in southern Manitoba. Migratory birds already arrived by early to mid March. Snow and ice melt were unusually early as well. The snow pack eroded from southwest to northeast with Brandon losing its snowpack by around March 10. Winnipeg's snow pack reached 0 cm by March 15, tied with 1995 and 2015 for 3rd earliest snow melt on record since 1955. River ice also disappeared by the end of March.

Comparing 2016 to 2013 around the same time in mid March in Winnipeg

The thunderstorm season also came to an early start. Isolated thunderstorm cells occurred late evening on March 7 in southeastern Manitoba and occurred as close to Winnipeg as Selkirk. Winnipeg's earliest recorded thunderstorm was on March 19, 2012, but no thunderstorms occurred in the city in March this year. Stronger thunderstorms pushed into southwestern Manitoba from North Dakota late evening on March 14 and overnight on March 15. Pea to dime size hail was reported in the Killarney area along with a decent lightning show. The thunderstorms were associated with a strong system moving up from the US. Heavy rains spread across the Red River Valley in the morning on March 15. Generally 15-20 mm of rain fell in Winnipeg for the day. 15.7 mm fell at the airport, breaking the old record of 11.4 mm in 1946 for the day. The heavy early season rains caused overland flooding because the ground was still frozen. A state of emergency was issued in one municipality southeast of Winnipeg due to flooding concerns. Fields were underwater.

The system which moved into Ontario pumped ample moisture westward back into Manitoba late March 16 into early March 17. Heavy snow spread from east to west. Generally 5-10 cm fell from Brandon eastward with 10-15 cm close to the Ontario border (14 cm in Pinawa). In Winnipeg, 8-10 cm fell. The snow was very wet and stuck onto anything it landed on making for a spectacular winter scene in the morning as seen in the photos below that I took.

Generally mild conditions continued through the remainder of the month with a couple more double digit days at the end of the month.

Similar to February, warm temperatures in March were increasingly extreme as you went westward and southward. Average temperatures and ranking for March are provided below:

Brandon MB ................. -0.6°C ....... 6th warmest
Regina SK ....................    0.3°C ....... 5th warmest
Calgary AB ..................    3.3°C ....... 3rd warmest
Grand Forks ND ..........    2.2°C ....... 2nd warmest
Fargo ND ....................    3.6°C ........ 3rd warmest

Some milestones were reached. In Regina, a high of 17.3°C on March 5 was the earliest high over 17°C on record since 1884. It broke the old record by two weeks (old record March 18, 1910). In addition, 5 record highs were broken during the month, including a 4-day streak of record highs from the 10th to 13th. In Bismarck ND, temperatures reached 24°C on March 6, the earliest it has been that warm on record. The warmth extended into the Yukon as well with Whitehorse reaching an all-time March high twice with highs of 12.7°C on the 29th and 16.8°C on the 31st. These broke the old all-time March high record of 11.7°C in 1979. The high of 16.8°C on the 31st was three weeks earlier than Whitehorse has seen before. It was so warm out west that there were reports of budding trees in late March and farmers seeding their fields in mid March in southern Alberta, a couple weeks earlier than ever seen before.