73 F. average high on May 28.
81 F. high on May 28, 2014.
May 28, 1965: Late season snow falls across all of Minnesota with Duluth and Caribou reporting an inch.
Merits of Dew Point
"It's not the heat it's the humidity." Chances are you've heard that before, and it's true. When there's considerable water in the air your body's natural cooling system (evaporating sweat off your skin) doesn't work nearly as efficiently, making it easier to overheat.
Relative humidity is just that, relative to the temperature. A humidity of 90 percent on a day when it's 60F is tolerable. But a relative humidity of 45 percent on a 95 degree day is hideous; like living in a close-in suburb of Hades.
Dew point is a much better indicator, an absolute value, one number that instantly sums up how it really feels outside. Anything above 60 is sticky, 70 feels tropical, 80 is dangerous. In the 7-Day, where appropriate, I'll be mentioning dew point (DP) to try and set sweaty expectations.
Showers and a few heavier T-storms blossom today with some half-inch-plus rainfall amounts. Have a Plan B, especially evening hours. Cool, dry Canadian exhaust treats us to a fresh blue-sky weekend.
Dew points drop from 60F to 40F, meaning half as much water in the air.
A sticky warm front surges north next week; more 80s with a dew point that will make you want to quickly change the subject.
Short-Term Cooling Trend. GFS guidance shows cooler, drier air surging south of the border, resulting in free A/C from the Upper Midwest into the Great Lakes and eventually New England. Any respite from the humidity and T-storms will be brief as another warm front pushes north next week. Guidance: NOAA, animation: AerisWeather.
Photo credit above: "An Indian commuter uses the train's hose pipe to cool down on May 24, 2015 at the railway station in Allahabad, India. Most of northern India has been reeling under a heat wave with temperatures soaring to over 46 degree Celsius." (Prabhat Kumar Verma/Zuma Press/TNS).
Texas Rains In Keeping With Climate Change. Here's an excerpt of a statement from The Union of Concerned Scientists: "...Below is a statement by Brenda Ekwurzel, senior climate scientist at the Union of Concerned Scientists. “Around the world, April ocean temperatures have broken records. The Gulf is no exception. The hot Gulf waters combined with a brewing El Nino have contributed to some of the intense precipitation in Texas and beyond. “In addition, because a warmer atmosphere holds more water, climate change means that when it rains it’s more likely to pour. In Texas, the heaviest rainfalls have increased more than 16 percent over the long-term average. This trend will only increase as temperatures rise even more..."
Photo credit above: "A destroyed car is submerged in the Blanco River in Wimberley, Texas, after the flood on Tuesday May 26, 2015." (Jay Janner/Austin American-Statesman/TNS).
Photo credit above: "A photo provided by the Harris County Flood Control District shows flood waters covering Memorial Drive along Buffalo Bayou in Houston, May 26, 2015. The heavy rains have killed at least eight people in Texas and Oklahoma, including two in Houston where flooding turned streets into rivers." (Harris County Flood Control District via The New York Times).
Image of 2012 Superstorm Sandy courtesy of NASA.
Graphic credit above: "Changes in frequencies of storms in the Midwest, by category of storm size for five decades, 1961-1970 through 2001-2010. Labeled changes are for the last decade. Comparisons are to frequencies in 1961-1990."
TODAY: Showers and T-storms. Winds: NE 10-15. High: 76
FRIDAY NIGHT: Showers taper, turning breezy and cooler. Low: 49
SATURDAY: Blue sky, less humid. Dew point: 39 Winds: N 15. High: 62
SUNDAY: Fading sun, late shower. Winds: SE 10-15. Wake-up: 46. High: 68
MONDAY: Some sun, milder breeze. Wake-up: 52. High: 74
TUESDAY: Sticky sun, isolated T-storm. Wake-up: 60. High: 81
WEDNESDAY: Muggy, few T-storms. Dew point: 62. Wake-up: 62. High: 83
THURSDAY: More numerous T-storms. Wake-up: 65. High: 81
File photo above: AP/The Des Moines Register, Charlie Litchfield.
File photo above: "In this Tuesday Jan. 20, 2015 file photo, a plume of steam billows from the coal-fired Merrimack Station in Bow, N.H. The Obama Administration’s hotly debated plan to cut the amount of heat-trapping carbon dioxide coming out of the nation’s power plants will save about 3,500 lives a year from also reducing other types of pollutions, a new independent study concludes." (AP Photo/Jim Cole, File)
Image credit: "King Harald V of Norway."