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Post-tropical Cyclone Alpha at 40.9°N - 6.9°W

Location lookup failed

Last observation: 19 Sep 2020 - 11:10 UTC

« 2020 Storms »

Tracking started: 18 Sep 2020 - 16:30 UTC

Approximately 3700 miles from the U.S. east coast


Storm images and information

NHC Storm Description:

19 Sep 2020 - 3:00 UTC ...SHORT-LIVED ALPHA BECOMES A REMNANT LOW OVER THE DISTRICT OF VISEU PORTUGAL.. ...THIS IS THE LAST ADVISORY... As of 3:00 AM GMT Sat Sep 19 the center of Alpha was located near 40.9, -6.9 with movement NE at 16 mph. The minimum central pressure was 1005 mb with maximum sustained winds of about 30 mph.

18 Sep 2020 - 21:00 UTC ...ALPHA MAKES LANDFALL IN PORTUGAL... ...EXPECTED TO DISSIPATE ON SATURDAY... As of 9:00 PM GMT Fri Sep 18 the center of Alpha was located near 40.4, -8.4 with movement NE at 17 mph. The minimum central pressure was 998 mb with maximum sustained winds of about 45 mph.

18 Sep 2020 - 16:30 UTC ...SUBTROPICAL STORM ALPHA FORMS NEAR THE COAST OF PORTUGAL... ...EXPECTED TO BE SHORT-LIVED BUT BRING WINDS AND RAIN TO PORTIONS OF PORTUGAL... As of 4:30 PM GMT Fri Sep 18 the center of Alpha was located near 39.9, -9.3 with movement NE at 17 mph. The minimum central pressure was 999 mb with maximum sustained winds of about 50 mph.

Post-tropical Cyclone Alpha at 40.9°N - 6.9°W

GeoColor

True Color daytime, multispectral IR at night
19 Sep 2020 - 11:00 UTC

Last update > 1 hour

Day Convection

RGB used to identify areas of rapid intensification
19 Sep 2020 - 11:00 UTC

Last update > 1 hour

Day Land Cloud

EUMETSAT Natural Color
19 Sep 2020 - 11:00 UTC

Last update > 1 hour

Night Microphysics

RGB used to distinguish clouds from fog
19 Sep 2020 - 11:00 UTC

Last update > 1 hour

Air Mass RGB

RGB composite based on the data from IR and WV
19 Sep 2020 - 11:00 UTC

Last update > 1 hour

Sandwich RGB

Multi-spectral blend combines IR band 13 with visual band 3
19 Sep 2020 - 11:00 UTC

Last update > 1 hour


Band 1

0.47 µm
Blue - Visible
19 Sep 2020 - 10:40 UTC

Last update > 1 hour

Band 2

0.64 µm
Red - Visible
19 Sep 2020 - 11:00 UTC

Last update > 1 hour

Band 3

0.86 µm
Veggie - Near IR
19 Sep 2020 - 10:50 UTC

Last update > 1 hour

Band 4

1.37 µm
Cirrus - Near IR
19 Sep 2020 - 11:10 UTC

Last update > 1 hour

Band 5

1.6 µm
Snow/Ice - Near IR
19 Sep 2020 - 11:00 UTC

Last update > 1 hour

Band 6

2.2 µm
Cloud Particle - Near IR
19 Sep 2020 - 11:10 UTC

Last update > 1 hour

Band 7

3.9 µm
Shortwave Window - IR
19 Sep 2020 - 10:40 UTC

Last update > 1 hour

Band 8

6.2 µm
Upper-Level Water Vapor - IR
19 Sep 2020 - 10:50 UTC

Last update > 1 hour

Band 9

6.9 µm
Mid-Level Water Vapor - IR
19 Sep 2020 - 11:10 UTC

Last update > 1 hour

Band 10

7.3 µm
Lower-level Water Vapor - IR
19 Sep 2020 - 11:00 UTC

Last update > 1 hour

Band 11

8.4 µm
Cloud Top - IR
19 Sep 2020 - 11:00 UTC

Last update > 1 hour

Band 12

9.6 µm
Ozone - IR
19 Sep 2020 - 11:00 UTC

Last update > 1 hour

Band 13

10.3 µm
Clean Longwave Window - IR
19 Sep 2020 - 11:10 UTC

Last update > 1 hour

Band 14

11.2 µm
Longwave Window - IR
19 Sep 2020 - 10:50 UTC

Last update > 1 hour

Band 15

12.3 µm
Dirty Longwave Window - IR
19 Sep 2020 - 10:50 UTC

Last update > 1 hour

Band 16

13.3 µm
CO₂ Longwave - IR
19 Sep 2020 - 10:50 UTC

Last update > 1 hour