June 20 Summer Solstice Brings Sun And Low Humidity Then Dangerous Heat Wave Starts Sunday
Friday, June 20, 2025
Yesterday brought only the second 90°F day of the year to Baltimore. A lot more is on the way, and the dangerous heat wave with index values over 100°F will begin on Sunday. What will follow will be the first extreme heat wave of the year. Heat Index Values will be above 105°F starting on Monday.
Today will be a brief break. It will be the nicest day of the week ahead as we enjoy the longest daylight of the year!
Thursday Radar Recap: 3 PM to 8 PM
Rainfall totaled 0.49” in Baltimore, as the line of severe storms tracked across Central Maryland.
Storm Reports Thursday
The second day in a row with severe storms, with the focus near Route 50 again. There were other clusters including the track between Harpers Ferry to the northern suburbs of Baltimore.
- 89 reports in Maryland
- 171 across the Baltimore-Washington NWS coverage area
- 43 in Pennsylvania
- 3 in Delaware
Storm Photos
Lightning Over Maryland’s Capital
Annapolis Maryland, captured by Tara Davis
TODAY:
Morning Surface Weather
The cold front is well off the coast, and this new air mass will start off pleasant with comfortable humidity.
The Heat Dome will be building in this weekend and then take full hold for most of next week.
DEVELOPING: Jet Stream: 500mb Geopotential Heights
Friday through Wednesday
Tuesday Snapshot: Heat Dome
High Temperatures
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CLIMATE DATA: Baltimore
TODAY June 20
Sunrise at 5:41 AM
Sunset at 8:36 PM
Normal Low in Baltimore: 64ºF
Record 51ºF in 2022
Normal High in Baltimore: 86ºF
Record 100ºF 1934
Rainfall Deficit at BWI
- Ending 2024 = -8.00”
- Since Jan 1 = -1.34”
- We are STILL DOWN -9.34” INCLUDING LAST YEAR
DROUGHT MONITOR
A clear improvement, but some areas in North-Central Maryland are still in a ‘Moderate Drought,’ given the longer deficit.
Maryland Trek 12 August 3 to 9
Our full week team is set. We have our Day 4 all-bike ride open for registration.
Saturday
Morning Low Temperatures
Afternoon High Temperatures
LOOKING AHEAD
Sunday High Temps
Monday High Temps
Forecast Afternoon Heat Index
Monday
Tuesday
Wednesday
7 Day Forecast
Weekend: Hot and Dry
Next Week: Dangerous Heat
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THANK YOU:
Baltimore Sun Magazine Readers Choice Best Of Baltimore
Maryland Trek 11 Day 7 Completed Sat August 10
We raised OVER $111,000 for Just In Power Kids – AND Still Collecting More
The annual event: Hiking and biking 329 miles in 7 days between The Summit of Wisp to Ocean City.
Each day, we honor a kid and their family’s cancer journey.
Fundraising is for Just In Power Kids: Funding Free Holistic Programs. I never have and never will take a penny. It is all for our nonprofit to operate.
Click here or the image to donate:
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