On The Radio – September brings record heat worldwide

Temperatures in Kuwait reached 123 degrees Fahrenheit on September 3rd, 2017. (flickr/Lindsay Silveira)
Jenna Ladd | November 27, 2017

This week’s On The Radio segment discusses how September 2017 set high heat records all over the world. 

Transcript: September 2017 was the planet’s fourth warmest September since record-keeping began in 1880.

This is the Iowa Environmental Focus.

Warmer-than-usual temperatures were recorded across most of the world’s land and ocean surfaces during September this year, despite the absence of an El Niño effect. El Niño events typically bring warmer weather because they cause the ocean to release warm air into the atmosphere. September 2015 is the warmest on record, with September 2016 and 2014 trailing close behind.

The National Oceanic and Atmospheric Administration’s September global climate report noted record high temperatures in many of the world’s oceans and in parts of Africa and Asia. The hottest temperature in the Southern Hemisphere was 109 degrees Fahrenheit on September 27th in Birdsville, Australia. In the northern hemisphere, temperatures soared to 123 degrees Fahrenheit on September 3rd in Mitribah, Kuwait.

So far, 2017 is on track to become the second hottest year on NOAA’S 138-year record.

For more information and to read the September global climate report in full, visit iowa-environmental-focus-dot-org.

From the UI Center for Global and Regional Environmental Research, I’m Betsy Stone.

Iowa sees the “humidity effect” this week

Photo by Pentax_clic; Flickr

This week’s climate in some Iowa cities has been notably warm. However, the warmer than usual climate is not due to abnormally high temperatures, but rather high humidity levels.

Photo by Iowa State University Department of Agronomy

The chart above shows the difference between temperature and heat index at an 80 or above degree level. Continue reading

ISU: Second warmest RAGBRAI yet

Graph courtesy of the ISU Department of Agronomy

Last week’s bike ride across Iowa had the second highest heat index ever, according to the Iowa Environmental Mesonet at Iowa State University.

Read more below:

The Register’s Annual Great Bicycle Ride Across Iowa (RAGBRAI) took place last week and was a quite warm for participants. This 6 day long trek across Iowa starts on the Missouri River and ends on the Mississippi River. Assuming that the weather reported by the Des Moines station is representative of the state, the featured chart presents the average heat index and westerly wind for the six day period each year that RABGRAI occurred on since it started in 1973. This year’s average heat index was second to 1999. The bottom chart looks at a simple average of the westerly wind component during daylight hours. A wind from the east (negative values) would mean a head wind for bicyclists generally heading from the west to east. Easterly winds are typically associated with cooler weather, so you can pick your poison or a headwind or hot weather!

Heat wave sweeps across the Midwest

It’s hot out there, folks.  And temperatures are hitting remarkable levels all over Iowa, Minnesota and Illinois. 

Check out this coverage from Weather Underground and a map of Thursday’s heat forecast below.

Map courtesy of Weather Underground

Continue reading