July 20 2020
Today should be the worst of this stretch. Temps will be comparable or a little hotter than yesterday when BWI reached 100ºF. The humidity will make it feel worse. Many areas will feel above 100ºF, but some may rise above 110ºF on the heat index. This will be dangerous to be outside, and some experts began to mention wearing masks can add to early heat exhaustion.
Basically, if you can stay inside with air conditioning, this is the day to do that. Keep plenty of water to drink for you, kids, and pets. Please do not walk dogs on pavement mid day through 7 PM.
Heat Advisory and Excessive Heat Warning
The Dew Point Tells A Lot
This is the true measure of moisture in the air. The Relative Humidity (RH) is a calculation of this and the actually temperature, so when it gets hotter, the RH goes down.
The Dew Point is where the moisture in the air will condense. The higher it is, the harder it is for your body to have sweat evaporate to cool you off.
The upper 70s on Delmarva is why there is an Excessive Heat Warning in place.
When the Dew Point is higher than the water temperature, fog forms. If you were at the beach on Sunday, you may not have seen the sun until AFTER noon because of this.
Morning Satellite Loop
This morning a slight wind from the west high limit how widespread the fog holds.
The NAM has us in the upper 90s, but this has been cooler than verified lately… The HRRR is hotter.
The HRRR Model has many in central Maryland over 100ºF
Heat Index Forecast
There may be a cluster of storms forming after 4 PM
As in recent months, there may be more storms than shown on the modeling. With the high heat, any storms that form can contain dangerous lighting and high winds.
Radar Simulation —> Slider
Climate Report Today
Record Rainfall set in Baltimore at BWI
See the Weather Observations and Climate Report from this morning for more info about:
🌡 Climate data today
🗺 Weather Map
☀️ Sunrise and sunset times
🌙 Moon phase
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Increased storm coverage each day this week, with a break by the weekend.
The peak of the heat should be Monday, but the pattern will not be noticeably improved until the end of the week.
That will be tough to challenge with some of the hottest already set on those days
July 20 102ºF in 1930 July 21 104ºF in 1930 July 22 106ºF in 2011 July 23 102ºF in 2011+
Maryland Strong Love ❤️
My ‘bonus’ daughter made this map of Maryland a few years ago. We brought it back for needed positivity. Now on her pick of tanks, and this cool Maryland T for men or women.
This is all LOCAL: Made by Maryland Print House; Proceeds support my Maryland Trek 7 this August for Just In Power Kids.
Please share your thoughts, best weather pics/video, or just keep in touch via social media
New Video Series: What is this cloud?
Episode 3: Morning Glory at sunrise on the beach in North Carolina
Was Your County Not Included?
Click this map for more on the regional forecast zones
Baltimore Weather At BWI May Not Be As Hot As Reported
Construction at the airport close to the weather station may be added artificial heat. Click here or the image for the details.
Maryland Trek Cycle Jerseys From Hill Killer
All proceeds will go to the Maryland Trek 6 total and Just In Power Kids programs
Thank you to our Title Sponsor for Maryland Trek 6
Shining on with Smyth and their contribution, our team has raised over $100,000 for Just In Power Kids to provide free programs for kids in and post cancer treatment.
Just In Power Kids:
Proceeds go to our programs Providing FREE holistic care for kids in cancer treatment and up to 5 years post treatment and caregivers.
Proceeds from all sales go to Just In Power Kids. Click the image to shop and show your support.