Monday August 3 2020

Tropical Storm Isaias has been holding at 70 mph overnight and will try one more time to reach hurricane intensity briefly today before making landfall. But it will return to a tropical storm on land when it reaches us. The forecast path across the Chesapeake Bay through Maryland on Tuesday has pushed an upgrade from Watch to Warning for both tropical storm winds and flash flooding for parts of Maryland along the path.

There is a lot of information to share. Please see all the maps. I will break it down here and post frequent updates during the day.

Quick Cast:

Today: 🌦Showers begin mid afternoon. Temps = 80s

Evening/Night: ⛈Rain, some thunder.

Tuesday: ⚠️🌀⛈💦 Tropical Storm means Heavy rain, high winds, flooding. Peak Intensity 8 AM to 2 PM.

💨  Expect power outages, down trees, flying lawn furniture and debris. 🌪There may be isolated tornados near and east of the center.


Rain Today Not Directly From Isaias 

Radar Simulation —> slider

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Tropical Storm Isaias Forecast Path

Latest Update Info and Forecast Maps are below


  • Landfall near the SC/NC border tonight.
  • Strongest Storm Surge will be east of the center at landfall.
  • Forward speed will increase as it passes over land.
  • Path across the Chesapeake Bay mid day Tuesday.
  • Some surge on the Bay but limited since the storm will be crossing land. So less water dragged in (not like Isabel).
  • Full Moon today will add in astronomical high tides.


August 3 Tropical Storm Isaias


Tropical Storm Warnings And Watches

  • Warning for wind gusts up to 70 mph. This is mainly for places east of the center of the storm.
  • Watch for wind gusts likely 35 to 55 mph. This is around the immediate center and just west. Father west the winds will be less intense, but the rain will still be heavy.

Tropical Storm Warning and Watch Isais Maryland August 3


Flash Flood Warnings And Watches

Flooding will come from heavy rain AND some storm surge up the Bay.

There will be more ‘sloshing’ due to winds and Full Moon high tides keeping water high.

Flash Flood Warning and Watch Isais Maryland August 3


Tropical Storm Isaias Update

Satellite Loop


Winds are 70 mph and it is now (once again) expected to regain hurricane intensity before making landfall tonight. It will return to a tropical storm inland before reaching us. 
August 3 Tropical Storm Isaias satellite


Forecast Maps

HWRF Model Tracking The Center Of The Storm


HWRF Model:

Tracking across the Lower Eastern Shore late morning

Tropical Storm Isais HWRF Maryland August 3


GFS Model:

This model tracks the center farther north. Passing just south of the Bay Bridge and into northern Delmarva.

Tropical Storm Isais GFS Maryland August 3


ECMWF Model:

This model is slower, with a passage of the center of Isais near the Bay Bridge in the early afternoon.

Tropical Storm Isais ECMWF Maryland August 3


NAM 3 Km Radar Simulation —> slider

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Rainfall Forecast
The heaviest rain will be along and just west of the path.
August 3 rainfall tropial storm Isaias NAM Monday

Wind Forecast

This is for Tuesday August 4- I am sorry, there was a typo in the banner. 

Tropical Storm Isaias wind gusts Tuesday 10 AM
Tropical Storm Isaias wind gusts Tuesday 1 PM

Also See:

Climate Report Today

Record Rainfall set in Baltimore at BWI

See the Weather Observations and Climate Report from this morning for more info about:

August 3 full moon Monday

📋Observations yesterday

🌡 Climate data today

🗺 Weather Map

☀️ Sunrise and sunset times

🌙 Moon phase


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


Record Hottest Month in Baltimore July 2020

Related Posts

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



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Water Spout OR Scud Cloud on videos and photos near Middle River Maryland


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