June 21 Expanding Heat Alerts Into The Weekend And Something Tropical Off Of The East Coast
Friday, June 21
Morning Report
Today is the first full day of summer and a full moon. The daylight will be 1 second shorter, and the bright night will keep the light going. This may just play into the heat wave for our minds…
The heat is building and will be at its worst this weekend! On Saturday, the Heat Index may approach 110ºF, making it dangerous to be outside without proper precautions such as clothing and fluids.
Heat Advisory Today/Watch in Maryland Tomorrow
Our chance of afternoon storms will be low but will increase Sunday night. Sunday is the day Baltimore has the highest chance of breaking any records.
Baltimore Record Highs
- Friday June 21 = 100ºF 1923; 2021
- Saturday June 22 = 100ºF 1988
- Sunday June 23 = 97ºF 2010
Morning Surface Weather
Hot and Humid. The only new thing here is the expansion of the heat wave and less cooling near the Chesapeake Bay and Atlantic beaches.
The National Hurricane Center has identified Tropical Invest 92L, which has a 50% chance of developing in the next 48 hours before landfall. This may encourage more inland thunderstorms into early next week.
Tropical Forecast Tracks
Vorticity Forecast Friday to Monday
Rain Forecast Friday to Monday
Afternoon Temperatures
The humidity will be more noticeable, making it feel like 100ºF or hotter.
CLIMATE DATA: Baltimore
TODAY June 21
Sunrise at 5:41 AM
Sunset at 8:36 PM
Normal Low in Baltimore: 64ºF
Record 50ºF in 1968
Normal High in Baltimore: 86ºF
Record 100ºF 1923; 2021
Saturday
Dangerous Heat! Heat Index may reach 110ºF in central Maryland. Isolated T’storms in the afternoon.
Morning Temperatures
Afternoon Temperatures
The humidity may make it feel like close to 110ºF.
Radar Simulation: Noon to 10 PM
This product is a suggestion, NOT a promise of timing or location. Storms will pop up randomly during the afternoon and evening.
Looking Ahead:
Storm Forecast Animation: Saturday Morning to Monday Night
Snapshots
Sunday Night
Monday Morning
7 Day Forecast
Dangerous Heat this weekend will break a little. The best chance for storms will be Sunday night into Monday… then a second surge of heat next week may end with more storms on Thursday.
If You Missed It: Click To See
5 Tornadoes Confirmed In Maryland (so far) on June 5
June 5 Storm Report (Preliminary) With Videos And Photos
Hurricane Season Outlook
Click to read: NOAA Releases Most Aggressive Outlook
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RESTATING MY MESSAGE ABOUT DYSLEXIA
I am aware there are some spelling and grammar typos and occasional other glitches. I take responsibility for my mistakes and even the computer glitches I may miss. I have made a few public statements over the years, but if you are new here, you may have missed it: I have dyslexia and found out during my second year at Cornell University. It didn’t stop me from getting my meteorology degree and being the first to get the AMS CBM in the Baltimore/Washington region.
One of my professors told me that I had made it that far without knowing and to not let it be a crutch going forward. That was Mark Wysocki, and he was absolutely correct! I do miss my mistakes in my own proofreading. The autocorrect spell check on my computer sometimes does an injustice to make it worse. I also can make mistakes in forecasting. No one is perfect at predicting the future. All of the maps and information are accurate. The ‘wordy’ stuff can get sticky.
There has been no editor who can check my work while writing and to have it ready to send out in a newsworthy timeline. Barbara Werner is a member of the web team that helps me maintain this site. She has taken it upon herself to edit typos when she is available. That could be AFTER you read this. I accept this and perhaps proves what you read is really from me… It’s part of my charm. #FITF