July 27th 2013: October in the Summer

July 2013 has had above-normal temperatures in Minnesota in relation to past years, with many stations across Minnesota reporting plus one to two degrees F above average. These departures were knocked down a rung after a chilly air mass moved through Minnesota on July 27th, 2013, this pocket of air snuck right over the shore of Superior and ushered in fall-like conditions for the majority of the state. In the Twin Cities area, the temperature rose to a bone-chilling 64 degrees F on the 27th, which broke the record low-maximum temperature set in 1991 at 65 degrees F. To put this in perspective, the Twin Cities will normally see a high of 64 degrees F during the first week of October. Many other locations, such as Crow Wing and Aitkin counties, also record low-maximum temperatures, with 9 reports of records being broken and 2 reports of records being tied.

In addition to low-maximum temperatures for the day, July 27th 2013 was cool enough to break minimum temperature records as well. Eau Claire tied the record low at 46 degrees F set back in 1981, and St. Cloud broke the record low with 43 degrees F, the previous record was 44 degrees from 1981. There were also 3 other locations that broke records, and 4 locations that tied records. The raw data can be found below.

The coldest low-maximum temperature for the Twin cities in July is 58 degress, which occured on July 4th, 1967. Oddly enough, the higest-maximum temperature for the Twin cities in January is also 58 degress.

At 7 AM Saturday, the temperature was 35.6 degrees F at around 5000 feet (850 mb) above the ground, one of the coldest pools of air we've seen since data has been recorded. The National Weather Service Office in Chanhassen has a story in which they talk about the record breaking 850 mb temperatures, along with the cool conditions across Minnesota.

Below is the data for record low maximums and record low minimums, respectively.

Record Low Maximums for Minnesota on July 27th, 2013

YEAR    REC 	PREV	PREV YEAR	POR*	COUNTY		NAME
-----	----	----	---------	---	----------	--------------------
2013	59	64	2005		111	AITKIN		SANDY LAKE DAM LIBBY
2013	60	66	1972		48	CARLTON		WRIGHT 3 E
2013	60	68	1925		105	MILLE LACS	MILACA
2013	62	66	2005		45	AITKIN		ISLE 12N
2013	63	67	1971		113	CROW WING	PINE RIVER DAM
2013	64	64	1991		51	CROW WING	BRAINERD
2013	64	68	1971		95	TODD		LONG PRAIRIE
2013	64	64	1971		72	CASS		GULL LAKE DAM
2013	65	68	2005		90	WADENA		WADENA 3 S
2013	66	68	1971		109	KANABEC		MORA
2013	66	72	1971		52	STEARNS		MELROSE


Record Low Minimums for Minnesota on July 27th, 2013
YEAR    REC 	PREV	PREV YEAR	POR*	COUNTY		NAME
-----	----	----	---------	---	---------	-----------------
2013	39	42	1911		110	PIPESTONE	PIPESTONE
2013	45	48	2005		41	NOBLES		WORTHINGTON 2 NNE
2013	46	46	1971		84	TRAVERSE	WHEATON
2013	47	47	1905		110	FARIBAULT 	WINNEBAGO
2013	48	48	1971		51	STEELE		OWATONNA
2013	48	48	2005		54	CHISAGO		FOREST LAKE 5NE
2013	49	50	2005		76	LYON		MARSHALL

*POR= Period of Record