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9 Nov 2024 - 04:01 UTC

Post-tropical Cyclone Sean at 18.2°N - 49.3°W

North Atlantic Ocean

Last observation: 16 Oct 2023 - 11:10 UTC

« 2023 Storms »

11 Oct 2023 - 16 Oct 2023

Approximately 2000 miles from the U.S. east coast


Storm images and information

NHC Storm Description:

16 Oct 2023 - 3:00 UTC ...SEAN DEGENERATES INTO A REMNANT LOW... ...THIS IS THE FINAL ADVISORY... As of 11:00 PM AST Sun Oct 15 the center of Sean was located near 18.2, -49.3 with movement WNW at 12 mph. The minimum central pressure was 1011 mb with maximum sustained winds of about 30 mph.

15 Oct 2023 - 21:00 UTC ...SEAN FORECAST TO BECOME A REMNANT LOW TONIGHT... As of 5:00 PM AST Sun Oct 15 the center of Sean was located near 18.0, -48.2 with movement WNW at 12 mph. The minimum central pressure was 1010 mb with maximum sustained winds of about 30 mph.

15 Oct 2023 - 15:00 UTC ...SEAN FORECAST TO BECOME A REMNANT LOW LATER TODAY... As of 11:00 AM AST Sun Oct 15 the center of Sean was located near 17.7, -47.1 with movement WNW at 10 mph. The minimum central pressure was 1010 mb with maximum sustained winds of about 30 mph.

15 Oct 2023 - 9:00 UTC ...SEAN FORECAST TO BECOME A REMNANT LOW SOON... As of 5:00 AM AST Sun Oct 15 the center of Sean was located near 17.4, -46.2 with movement WNW at 9 mph. The minimum central pressure was 1009 mb with maximum sustained winds of about 35 mph.

15 Oct 2023 - 3:00 UTC ...SEAN HANGING ON AS A TROPICAL DEPRESSION... As of 11:00 PM AST Sat Oct 14 the center of Sean was located near 16.9, -45.5 with movement NW at 8 mph. The minimum central pressure was 1008 mb with maximum sustained winds of about 35 mph.

14 Oct 2023 - 21:00 UTC ...SEAN MOVING NORTHWESTWARD... As of 5:00 PM AST Sat Oct 14 the center of Sean was located near 16.5, -44.8 with movement NW at 9 mph. The minimum central pressure was 1007 mb with maximum sustained winds of about 35 mph.

14 Oct 2023 - 15:00 UTC ...SEAN WEAKENS TO A DEPRESSION... As of 11:00 AM AST Sat Oct 14 the center of Sean was located near 16.0, -44.2 with movement NW at 8 mph. The minimum central pressure was 1007 mb with maximum sustained winds of about 35 mph.

14 Oct 2023 - 9:00 UTC ...SEAN EXPECTED TO WEAKEN OVER THE WEEKEND... As of 5:00 AM AST Sat Oct 14 the center of Sean was located near 15.4, -43.4 with movement WNW at 8 mph. The minimum central pressure was 1006 mb with maximum sustained winds of about 40 mph.

14 Oct 2023 - 3:00 UTC ...SEAN MOVING SLOWLY OVER THE CENTRAL ATLANTIC... As of 11:00 PM AST Fri Oct 13 the center of Sean was located near 15.1, -42.9 with movement WNW at 8 mph. The minimum central pressure was 1006 mb with maximum sustained winds of about 40 mph.

13 Oct 2023 - 21:00 UTC ...SEAN STRUGGLING THIS AFTERNOON... As of 5:00 PM AST Fri Oct 13 the center of Sean was located near 14.9, -42.5 with movement WNW at 12 mph. The minimum central pressure was 1006 mb with maximum sustained winds of about 40 mph.

13 Oct 2023 - 15:00 UTC ...SEAN WEAKENING... As of 11:00 AM AST Fri Oct 13 the center of Sean was located near 14.6, -41.7 with movement WNW at 12 mph. The minimum central pressure was 1006 mb with maximum sustained winds of about 40 mph.

13 Oct 2023 - 9:00 UTC ...SEAN MOVING WEST-NORTHWESTWARD OVER OPEN WATERS... As of 5:00 AM AST Fri Oct 13 the center of Sean was located near 14.3, -40.5 with movement WNW at 13 mph. The minimum central pressure was 1004 mb with maximum sustained winds of about 45 mph.

13 Oct 2023 - 3:00 UTC ...SHEARED SEAN SLIGHTLY STRENGTHENS... As of 11:00 PM AST Thu Oct 12 the center of Sean was located near 14.1, -39.5 with movement WNW at 14 mph. The minimum central pressure was 1005 mb with maximum sustained winds of about 45 mph.

12 Oct 2023 - 21:00 UTC ...SEAN MOVING NORTHWESTWARD... As of 5:00 PM AST Thu Oct 12 the center of Sean was located near 13.8, -38.2 with movement NW at 12 mph. The minimum central pressure was 1006 mb with maximum sustained winds of about 40 mph.

12 Oct 2023 - 15:00 UTC ...SEAN STRENGTHENS BACK INTO A TROPICAL STORM... As of 11:00 AM AST Thu Oct 12 the center of Sean was located near 13.1, -37.2 with movement NW at 10 mph. The minimum central pressure was 1006 mb with maximum sustained winds of about 40 mph.

12 Oct 2023 - 9:00 UTC ...SEAN STILL A SHEARED TROPICAL DEPRESSION... As of 5:00 AM AST Thu Oct 12 the center of Sean was located near 12.5, -36.7 with movement WNW at 12 mph. The minimum central pressure was 1007 mb with maximum sustained winds of about 35 mph.

12 Oct 2023 - 3:00 UTC ...SEAN A TROPICAL DEPRESSION ACCORDING TO SATELLITE-DERIVED WIND DATA... ...UNLIKELY TO GET MUCH STRONGER IN THE COMING DAYS... As of 11:00 PM AST Wed Oct 11 the center of Sean was located near 12.0, -36.2 with movement WNW at 13 mph. The minimum central pressure was 1007 mb with maximum sustained winds of about 35 mph.

11 Oct 2023 - 21:00 UTC ...SEAN STRUGGLING TO ORGANIZE... As of 5:00 PM AST Wed Oct 11 the center of Sean was located near 11.6, -35.3 with movement WNW at 13 mph. The minimum central pressure was 1006 mb with maximum sustained winds of about 40 mph.

11 Oct 2023 - 15:00 UTC ...SEAN CONTINUES MOVING WEST-NORTHWESTWARD... As of 11:00 AM AST Wed Oct 11 the center of Sean was located near 10.9, -34.4 with movement WNW at 13 mph. The minimum central pressure was 1006 mb with maximum sustained winds of about 40 mph.

11 Oct 2023 - 9:00 UTC ...SEAN FORMS BUT IT IS NOT LIKELY TO STRENGTHEN MUCH... As of 5:00 AM AST Wed Oct 11 the center of Sean was located near 10.3, -33.1 with movement WNW at 13 mph. The minimum central pressure was 1006 mb with maximum sustained winds of about 40 mph.

11 Oct 2023 - 3:00 UTC ...TROPICAL DEPRESSION FORMS IN THE EASTERN TROPICAL ATLANTIC... As of 11:00 PM AST Tue Oct 10 the center of Nineteen was located near 9.7, -32.0 with movement W at 13 mph. The minimum central pressure was 1008 mb with maximum sustained winds of about 35 mph.

Post-tropical Cyclone Sean at 18.2°N - 49.3°W

GeoColor

True Color daytime, multispectral IR at night
16 Oct 2023 - 10:50 UTC

Last update > 1 hour

GLM FED

Lightning flash extent over GeoColor
16 Oct 2023 - 10:51 UTC

Last update > 1 hour

Day Convection

RGB used to identify areas of rapid intensification
16 Oct 2023 - 10:40 UTC

Last update > 1 hour

Day Night Cloud Micro Combo

Day: show phase of cloud tops; night: distinguish clouds from fog
16 Oct 2023 - 10:40 UTC

Last update > 1 hour

Air Mass RGB

RGB based on data from IR & water vapor
16 Oct 2023 - 10:40 UTC

Last update > 1 hour

Sandwich RGB

Blend combines IR band 13 with visual band 3
16 Oct 2023 - 10:40 UTC

Last update > 1 hour


Band 1

0.47 µm
Blue - Visible
16 Oct 2023 - 10:40 UTC

Last update > 1 hour

Band 2

0.64 µm
Red - Visible
16 Oct 2023 - 10:40 UTC

Last update > 1 hour

Band 3

0.86 µm
Veggie - Near IR
16 Oct 2023 - 10:40 UTC

Last update > 1 hour

Band 4

1.37 µm
Cirrus - Near IR
16 Oct 2023 - 10:40 UTC

Last update > 1 hour

Band 5

1.6 µm
Snow/Ice - Near IR
16 Oct 2023 - 10:40 UTC

Last update > 1 hour

Band 6

2.2 µm
Cloud Particle - Near IR
16 Oct 2023 - 10:40 UTC

Last update > 1 hour

Band 7

3.9 µm
Shortwave Window - IR
16 Oct 2023 - 10:40 UTC

Last update > 1 hour

Band 8

6.2 µm
Upper-Level Water Vapor - IR
16 Oct 2023 - 10:40 UTC

Last update > 1 hour

Band 9

6.9 µm
Mid-Level Water Vapor - IR
16 Oct 2023 - 10:40 UTC

Last update > 1 hour

Band 10

7.3 µm
Lower-level Water Vapor - IR
16 Oct 2023 - 10:40 UTC

Last update > 1 hour

Band 11

8.4 µm
Cloud Top - IR
16 Oct 2023 - 10:40 UTC

Last update > 1 hour

Band 12

9.6 µm
Ozone - IR
16 Oct 2023 - 10:40 UTC

Last update > 1 hour

Band 13

10.3 µm
Clean Longwave Window - IR
16 Oct 2023 - 10:40 UTC

Last update > 1 hour

Band 14

11.2 µm
Longwave Window - IR
16 Oct 2023 - 10:40 UTC

Last update > 1 hour

Band 15

12.3 µm
Dirty Longwave Window - IR
16 Oct 2023 - 10:40 UTC

Last update > 1 hour

Band 16

13.3 µm
CO₂ Longwave - IR
16 Oct 2023 - 10:40 UTC

Last update > 1 hour