65 F. average high on September 30.
80 F. high on September 30, 2013.
September 30 in Minnesota Weather History. Source: MPX National Weather Service:
1999: One of the earliest significant snowfalls fell in a narrow track across southern Minnesota. Reported snowfall totals included 4.0 inches in Montgomery (LeSeur County) and Northfield (Rice County), 3.8 inches in Springfield (Brown County), 3.0 inches in Vesta (Redwood county), and 2.8 inches in Mankato (Blue Earth County).
1989: Temperatures across central and southern Minnesota were in the 80's. A cold front came through and dropped the mercury to the 40's.
Risk of October
Summer is a fading memory, a buggy, thundery mirage on the distant horizon. The sun is slipping ever lower into the southern sky now; longer nights chilling the Canadian prairie, sparking a parade of increasingly cold puffs. Nature's way of saying "do I have your attention yet?"
October is a fiendishly fickle month, capable of 90-degree heat, isolated tornadoes and Halloween Superstorms. The first frost in the metro usually arrives the first week of October - first flakes by mid-October; average snowfall for the month about a half inch or so.
Large north-south temperature contrasts whip up powerful storms. Unlike summer when precipitation is "convective" (thunderstorms 3-5 miles wide) smears of "stratiform" rain in October produce widespread puddles. Less hit or miss. By the end of the month the average high is a crisp 51F, give or take 20 degrees.
Today is the wettest day of the week; up to an inch of rain turning I-35 into a perpetual parking lot. Another surge of rain comes Thursday. Cold exhaust behind this storm has us groping for jackets by Friday, when temperatures hold near 50F with flurries over the Arrowhead.
60s return next week; I suspect we'll see a few more 70s before winter does its thing.
Image credit above: "A screenshot taken by NWS meteorologists, capturing the odd radar reflectivity that appeared east of St. Louis, Mo. on Friday morning." (NWS St. Louis via Facebook)
Photo credit above: " " Photograph: Global Warming Images/WWF-Canon.
TODAY: Rain, heavy at times. A few T-storms. Winds: SE 10. High: 63
WEDNESDAY NIGHT: More showers, possible thunder. Low: 56
THURSDAY: Another surge of rain likely. High: 61
FRIDAY: Cold and raw. Lingering showers, especially PM hours. Wake-up: 46. High: 51
SATURDAY: Mostly cloudy, jacket-worthy. Wake-up: 37. High: 49
SUNDAY: Lot's of clouds, still chilly. Wake-up: 44. High: 48
MONDAY: Metro frost. Plenty of sun. Wake-up: 36. High: 51
TUESDAY: Early shower, then slightly milder with some PM sun. Wake-up: 44. High: near 60
Image credit above: "Arctic sea ice hit its annual minimum on Sept. 17, 2014. The red line in this image shows the 1981-2010 average minimum extent. Data provided by the Japan Aerospace Exploration Agency GCOM-W1 satellite." Image: NASA/Goddard Scientific Visualization Studio.
How Global Warming Affected Extreme Weather Events in 2013 - Interactive. Following up on yesterday's posts here's an effective interactive infographic from The Guardian: "From Australia’s off-the-charts heat wave to Colorado’s biblical deluge, Europe’s scorching summer, and Britain’s miserable spring, nine events were caused at least in part by climate change, scientists conclude in a report in the Bulletin of the American Meteorological Society on Monday. Overseen by the US Noaa and the UK Met Office, 92 scientists from 14 countries looked at how climate change affected 16 of the biggest weather events of 2013."
Photo credit above: " Photograph: Mark Garten//UN Photo/Sipa/SI/Rex.
Image credit above: "Istanbul after GIS modeling of climate change." Image courtesy of #DrownYourTown.