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MM’s Tues Wx Blog for July 20

MM News

Mark your calendars for July 27 at 4:00! That will be the next Meteorologist Mark science class for kids! The topic this month will be flooding. Registration is required and that sign-up sheet can be found at The class is sponsored by TCAT. To support the educational outreach programs of MM or the maintenance of this site, find the donate button on this page or scroll to the bottom of this page for the Paypal link. Thank you!

Radar & Wx Alerts Link 

Radar can be found here:

Weather alerts can be found here:

Weather Headlines 

Rain chances vary each day

Best rain chance is Friday (50/50)

Saturday trending drier

Meteorologist Mark’s Wx Vlog 

The hat is back!

Seven-Day Forecast

Daily Forecast 

Tuesday: Partly to mostly sunny, with a chance for a mainly afternoon/evening shower or storm. Greatest chance is south of Interstate 40.

Wednesday: Mostly sunny, with just a slight chance for an afternoon shower or storm.

Thursday & Friday: Partly to mostly cloudy, with scattered mainly afternoon/evening showers & storms.

Saturday: Partly to mostly sunny, with just a slight chance for a shower or thunderstorm.

Sunday & Monday: Partly to mostly sunny, with a chance for showers and thunderstorms.

Hay Weather Forecast

The best rain chance today is south of Interstate 40. Areas across Overton and Fentress Counties have a better chance of staying dry. The latter part of the forecast is dependent upon weather factors that keep changing, so stay tuned for any forecast changes that may come for the weekend. For now, the forecasting is trending on the drier side.

Meteorologist Mark’s Wx Concerns

Almanac for Yesterday


The tropics remain sleepy….

Blue Sleeping Puppy Painting by MGL Meiklejohn Graphics Licensing

Sun & Moon

Planting by the Moon 

20th Barren days, neither plant nor sow.

21st – 22nd Any above ground crops that can be planted now will do well.

23rd – 24th Good days for killing weeds, briars, and other plant pests. Poor for planting.

25th – 27th Set strawberry plants. Good days for transplanting. Good days for planting beets, carrots, radishes, salsify, turnips, peanuts, and other root crops. Also good for vine crops.

28th – 29th A barren period.

30th – 31st Good days for transplanting. Root crops that can be planted now will yield well.


1st Good day for transplanting. Root crops that can be planted now will yield well.

2nd – 3rd Any seed planted now will tend to rot.

4th – 6th Plant seedbeds and flower gardens. Good days for transplanting. Most favorable days for planting beets, onions, turnips, and other root crops.

On This Day in Wx History

1930 – The temperature at Washington D.C. soared to an all-time record of 106 degrees. The next day Millsboro reached 110 degrees to set a record for the state of Delaware. July 1930 was one of the hottest and driest summers in the U.S., particularly in the Missouri Valley, where severe drought conditions developed. Toward the end of the month, state records were set for Kentucky with 114 degrees, and Mississippi with 115 degrees.

Yesterday’s National Temperature Extremes

High:  117° at Death Valley, California

Low:   36° at both Big Piney, Wyoming & Peter Sinks, Utah 

Twister Tuesday

The NWS website lists a tornado observed and photographed by a hiker, Scott Newton, at 12,000 feet in Sequoia National Park, California, on July 7, 2004, as the likely candidate for highest elevation tornado ever known.

Today’s Tennessee Weather 

Rain chances decrease to around 30% today, and that’s mainly for the southern half of the state. Skies should be partly to mostly cloudy statewide, with afternoon highs climbing into the low to mid 80s.

Tonight’s Tennessee Weather 

A few lingering showers or storms may hold on into the early evening for southeast Tennessee, including the Chattanooga area. Otherwise, skies will be partly to mostly cloudy overnight, with muggy low temps dropping into the mid to upper 60s.

Tomorrow’s Tennessee Weather 

A typical summertime Tennessee day awaits us for our midweek. Partly cloudy and humid conditions will lead to a 30% chance for an afternoon/evening shower or storm. Those afternoon temps should top out in the mid to upper 80s.

Drought Monitor

The drought monitor is updated each Thursday.

Weather SnapShots

Mike Olbinski (@MikeOlbinski) captured this incredible lightning strike in Arizona yesterday.


NASA Nerdology 

John Glenn went to space twice- once as the first American to orbit the Earth, and second as the oldest person to go to space at the age of 77! John served as a payload specialist on STS-95 Discovery in 1998.

Commander Curtis Brown (left) and Payload Specialist John Glenn on the aft flight deck of Discovery

You all have a great day and keep lookin’ up!

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