Thursday September 3 2020

Follow up to my prior report, a Tornado Watch has been issued for our region through this evening. If you have seen the sun today, that has helped to destabilize the air. There is significant wind sheer aloft, which is a change in direction with height. This helps storms rotate and possibly develop funnels.

In addition, there will be the potential for other severe parameters in numerous storms. This includes: Flash Flooding for rain potential of 2 inches, damaging winds over 60 mph, large hail over 1 inch diameter, and dangerous lightning.

If you have not seen it yet: I have live radar and lightning on interactive maps. They are in the Maryland Weather Page. You can see that tab at the top or below the sliders.

Tornado Watch

This includes southern Pennsylvania, most of central Maryland, northern Virginia, and all of Delmarva.

Tornado Watch Thursday September


Alert Reminder:

  • Watch: Means it ‘might; happen.
  • Warning: It is happening NOW! Short range timing and track for towns will be issued.


Safe Place: Do you know yours?

If you have a tornado warning, the best places to go are:

  • Basement
  • Interior Room with no windows
  • Bathroom/In The Tub if there is actually damage occurring.
  • Grab a pillow or blanket to cover your head just in case there is debris
  • If driving and spot on, head away if you can or pull over. DO NOT park under an overpass. Winds are actually faster there.


Severe Storm Products

Tornado Parameter

This is on a scale of 0 to 10. This is similar to the the Tor-Con you may see on The Weather Channel, but this is an actually measurement. There are multiple spots with 4 or higher. That is not a promise, but concern enough for multiple twisters and touchdowns across southern PA, Potomac River Valley, and Delmarva.

Severe Storm Tornado Parameter September 3


This measurement of 26 or higher means moderate convective activity (thunderstorms). Reach near or above 40 is high risk

Severe Storm K Index September 3


Severe Storm Risk (from this morning)

New Severe Thunderstorm Risk Thursday September 3


Radar Simulations 

Reminder these model projections are NOT perfect. They can bet off for timing and location at times. But they can be a guide for activity and tracking.  Recently we have had much more storm activity than shown on these simulations.

NAM 3 Km —> slider

This is most aggressive, but has been the more accurate model in the past week.

This shows multiple lines of storms this afternoon and evening, and should be considered as a guide, not perfect.

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HRRR Model —> slider
This model had less activity, but still shows a few potent storms peaked around 8 PM in metro Baltimore.
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See Live Radar/Lightning And Satellite Loops

Maryland Radar and Weather 


Compare To The GFS Model Simulation 

Note there are differences in the timing and location of possible storm clusters.  This is normal and why we study models to determine which is more reliable or how to blend them all for the best forecast

NEW: Temperatures AND Thunderstorm Slider

Try this:

  • Use the Orange Button to slide the timeline on your own. Or hit the Play Button at the lower left.
  • You can also pinch to zoom or move the map.

You will notice more storms possible on Thursday.

NEW: Interactive Rain and Wind Slider

Try this:

  • Use the Orange Button to slide the timeline on your own. Or hit the Play Button at the lower left.
  • You can also pinch to zoom or move the map.


Get Your Forecast Timeline
This is still a work in progress, but please check out these interactive pages:

Maryland Radar and Weather 

Maryland Weather Page

Get Your Local Maps And Forecast

I wanted to keep it simple. Just the basics for a quick view at any time.

Maryland Weather Just In Weather

14 Local Maryland Pages (and York PA)

We have made a page for Maryland Weather which gives you the current conditions for 14 present area locations. Many of these match up with the spots on our route.  Please use this list below are reference. I will include them daily with my articles on the kids.

Local Hourly Forecasts and Local Radar
Central Maryland
Southern Maryland




Climate Data And Weather Observations

September 3 moon phase Thursday


📋Observations yesterday

🌡 Climate data today

🗺 Weather Map

☀️ Sunrise and sunset times

🌙 Moon phase



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Also See:

July 2020 The hottest on record. Will it hint at snow this winter?


Record Hottest Month in Baltimore July 2020


Comet NEOWISE Viewing All July (photos/video)

Comet NEOWISE Bob Gelety


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.

Click here or on the image to see more

This is all LOCAL: Made by Maryland Print House; Proceeds support my Maryland Trek 7 this August for Just In Power Kids.MarylandStrongLoveJaiden


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2020 Tropical Storm and Hurricane Names and Naming History

Tropical Storm Hurricane History


Atlantic Tropical History: Maps of Origin Regions Every 10 Days

13_Tropical Storm Formation Sep11_20


Other  Links:

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.


Also See:

Double Solar Halo

Double solar halo June 8


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.


Shine On

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