Relentless rainfall into the early part of the warm season makes for rapid crop growth. A lot of water is contained within both crop and soil beneath and when a powerful upper ridge develops, so the heat draws water vapour into the atmosphere increasing humidity.

The below radar estimated rainfall for July so far indicates a rather wet area from North Carolina to Kansas up to Minnesota.

So, wet ground with strong ridge above, leads to higher humidity.

As a result the wet ground, abundance crop and heat has increased humidity to Caribbean levels as far north as North Dakota.

This evening.

Air temperature is hot but tempered by level of water vapour in the air.

Heat indexes are dangerous as a result of high heat and high humidity.

FEATURE IMAGE CREDIT: Mary Hightower ‏@AgWriterArk

[s2If current_user_can(access_s2member_level1)]

Dangerous in the coming days with little cooling by night.

Northeast is no picnic either.

Weather Channel forecasted highs and lows through the weekend into next week. Note the very warm nights as well as hot days!

Today’s high temperatures

See tonight’s video.

[/s2If][s2If current_user_cannot(access_s2member_level1)][magicactionbox id=”18716″][/s2If]