Thursday September 17 2020

Sally is now considered a Post Tropical Cyclone with no more advisories from the National Hurricane Center. However it still has an impressive circulation on the satellite loop, with plenty of rain moving well north of the Low in Georgia.

That rain is just now reaching southern Maryland. Some of the norther edge is expected in metro Baltimore tonight, but the very heavy rain will stay to the south. After looking at the latest radar simulation, we shift back to the Gulf of Mexico for what could be the next and last ‘named’ storm.  After Wilfred, we go to the Greek Alphabet.

Afternoon Weather Set Up

The remnant Low of Sally is in southern Georgia, but the rain has shifted well to the north.  A very impressive feeder band is pulling a thin line of heavy rain in from the Gulf of Mexico, across northern Florida, and into South Carolina. Some severe weather is still developing in this area, even though this is no longer an official tropical system.

September 17 Thursday Sally afternoon weather rain


Sally Satellite Loop

This visible loop shows the surface circulation well, along with that feeder band. The northern edge of the clouds has spread across our region. Look to the top edge and see the cirrus cloud fringe across New York and Ohio. If this storm was still over water, it would have a lot of support aloft to have keep it going. But this is dislodged from the surface Low now.



Radar Loop

This radar loop matches the same image shows off that feeder band I mentioned above. It also highlights the bulk of rain now reaching into southern Maryland.



Radar Snapshot at 2 PM

September 17 Sally rain radar Thursday 2 PM



Radar Simulation —> slider

The NAM 3 Km forecast is trying to bring in light rain across central Maryland later this afternoon and evening. This may be a bit early and overdone. But light rain should try to arrive this evening near Baltimore.

The moderate to heavy rain will clip southern Maryland and linger into the morning Friday. It will clear out in the afternoon.

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Rain Forecast
This is on the high end of the potential. Notice the sharp drop off from 3 to 6 inches to under 1 inch.
September 17 rain forecast Friday Sally
We do expect a VERY CHILLY weekend to follow. See that full forecast here in my morning report.
Tropical Update
We are just past the climatological peak season and almost out of names on the list. The last name available for 2020 in the Atlantic is Wilfred. That might be given to that system in the Gulf of Mexico (currently Invest 90L).  We may also need to look at Hurricane Teddy for high waves along the east coast and a track near northern New England.
September 17 National Hurricane Center Activity

Gulf of Mexico System (Invest 90L)
This has  90% chance to be named in the next 48 hours.
The computer model guidance has it moving northeast and looping around the western Gulf looking for steering currents.
September 17 Tropical Invest 90 forecast tracks
Hurricane Teddy is a Cat 3 Major Hurricane
This afternoon, winds were 120 mph, but it is no where near land.
National Hurricane Center Forecast Map (will auto update)
Computer Model Guidance Plots
September 17 Hurricane Teddy Forecast Tracks


Also See:


Severe Storm Report Photos And Video From Thursday

Lightning_I95 Baltimore Sep 3Annapolis Storm September 3

Storm Reports All September 3


Maryland Trek Team Shirt

All proceeds will go to the Just In Power Kids programs

Trek Team Shirt Gray

Maryland Trek Cycle Jerseys From Hill Killer

All proceeds will go to the Just In Power Kids programs


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




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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