Monthly Archives: June 2020

# June 22, 2020 – Forecast is “Yuck”

This weather looks like garbage. If you can, stay in. If you can’t, find a puddle and play. — If you have to get wet, may as well enjoy it.

Forecast from the NWS:

Showers and thunderstorms. High near 87. South wind 5 to 10 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

# Cristobal, June 7th, Landfall Imminent

The projected path of the storm has changed very little over the last 24 hours, and landfall at Dulac/Cocodrie is imminent. By the time you read this, Cristobal could be on land.

With the forward movement of the storm, the storm surge will not be as severe as it could be, but areas outside levy protection are expected to experience about 4 feet of water.

Winds at landfall should be around 50 mph, which is lower than the projected 60 mph.

Rain will be heavy, but coming in bands. Cristobal does not present as a well organized storm — which is good for us.

IMHO, late this evening, we should be in a good position, stormwise. The only thing that could change that is if the storm would stall. Which, there is no indication that it will do that.

I don’t have a Google Map made up. I need to work on automating it. I don’t have enough coffee in my body to do it this morning. ugh.

Thanks,
Jay C. “Jazzy J” Theriot

FORECAST POSITIONS AND MAX WINDSINIT 07/0900Z 27.3N 90.1W 45 KT 50 MPH
12H 07/1800Z 28.7N 90.3W 45 KT 50 MPH
24H 08/0600Z 30.8N 91.2W 35 KT 40 MPH…INLAND
36H 08/1800Z 33.3N 92.3W 30 KT 35 MPH…INLAND
48H 09/0600Z 36.6N 92.6W 25 KT 30 MPH…INLAND
60H 09/1800Z 40.9N 91.4W 25 KT 30 MPH…INLAND
72H 10/0600Z 46.0N 89.0W 30 KT 35 MPH…POST-TROP/EXTRATROP
96H 11/0600Z 52.0N 84.5W 30 KT 35 MPH…POST-TROP/EXTRATROP
120H 12/0600Z…MERGED WITH EXTRATROPICAL LOW$$Forecaster Beven # Cristobal 2020, Sat. June 6, Morning, Projected Path Please, forgive the rudimentary nature of the tracking map, I’m trying something new. Looks like Cristobal is going to be paying us a visit. Landfall is projected to be at Cocodrie, LA, about 11 am, Sunday, June 7, 2020, with winds of 60 mph. FORECAST POSITIONS AND MAX WINDSINIT 06/0900Z 23.8N 90.2W 40 KT 45 MPH 12H 06/1800Z 25.0N 90.4W 45 KT 50 MPH 24H 07/0600Z 26.8N 90.4W 50 KT 60 MPH 36H 07/1800Z 28.8N 90.5W 50 KT 60 MPH 48H 08/0600Z 30.6N 91.3W 40 KT 45 MPH…INLAND 60H 08/1800Z 33.2N 92.1W 30 KT 35 MPH…INLAND 72H 09/0600Z 36.4N 92.4W 25 KT 30 MPH…INLAND 96H 10/0600Z 45.0N 89.0W 25 KT 30 MPH…POST-TROP/EXTRATROP 120H 11/0600Z 52.5N 83.5W 25 KT 30 MPH…POST-TROP/EXTRATROP ## Invalid Request # Cristobal, June 5, 2020 – Projected Landfall – Morgan City – 60 mph – 1 am Monday My eyes are now focused on this storm. If you have interests in the Bayou Region of Southeast Louisiana outside the Morganza Levy system, you should too. The key indicator for areas east of the storm will be the rate of travel. Currently the storm is over land and will be for several more hours. Once Cristobal is over open water, rate of travel will determine the storm surge pushed. Think of blowing on a bowl of water. Blow too little, nothing happens. Blow to much, and you just get ripples. Blow at the right speed, and you can push a wave. This is how the storm pushes a surge. The most desirable outcome is ripples caused by a fast moving storm. If the storm is too slow, it strengthens. The surge won’t be so bad, but then the key destructive force becomes high winds and flooding due to excessive rain. I’ve been producing this report once a day for the last few days. I will attempt to release one about mid-day, or after the storm is over open water and moving. We want this storm to move fast. Imagery below. Thanks for reading, Jay C. “Jazzy J” Theriot Key Messages: 1. Damaging and deadly flooding was already occurring in portions of Mexico and Central America. Cristobal is expected to produce additional extreme rainfall amounts through the end of the week. The heaviest additional rainfall is expected over far southern Mexico and portions of the Yucatan Peninsula, while also extending along the Pacific coast from Chiapas to Guatemala and El Salvador. This rainfall could cause widespread life-threatening flash floods and mudslides. Refer to products from your local weather office for more information. 2. Cristobal is forecast to re-emerge over the southern Gulf of Mexico later today and move northward over the central and northern Gulf of Mexico over the weekend. There is a risk of tropical storm force winds this weekend from Louisiana to the western Florida Panhandle and a risk of dangerous storm surge from Louisiana to the Florida Big Bend. These hazards will arrive well in advance of and extend well east of Cristobal’s center. Storm surge and tropical storm watches will likely be issued for a portion of the U.S. Gulf Coast later today. 3. Heavy rainfall will spread into portions of the Gulf Coast from east Texas to Florida this weekend into early next week, with areas of flash flooding possible. FORECAST POSITIONS AND MAX WINDS INIT 05/0900Z 18.8N 90.1W 30 KT 35 MPH 12H 05/1800Z 20.1N 90.1W 30 KT 35 MPH…INLAND 24H 06/0600Z 22.0N 90.3W 35 KT 40 MPH…OVER WATER 36H 06/1800Z 23.8N 90.4W 40 KT 45 MPH…OVER WATER 48H 07/0600Z 25.7N 90.3W 45 KT 50 MPH…OVER WATER 60H 07/1800Z 27.6N 90.4W 50 KT 60 MPH…OVER WATER 72H 08/0600Z 29.6N 91.2W 45 KT 50 MPH…INLAND 96H 09/0600Z 34.0N 92.5W 30 KT 35 MPH…INLAND 120H 10/0600Z 40.0N 90.0W 25 KT 30 MPH…INLAND$$
Forecaster Zelinsky