NOAA GOES Image Viewer website
29 Oct 2020 - 22:02 EDT
30 Oct 2020 - 02:02 UTC

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

Location lookup failed

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.

Storm no longer tracked

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

Night Microphysics

RGB used to distinguish clouds from fog
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

Day Land Cloud

EUMETSAT Natural Color
19 Sep 2020 - 11:00 UTC

Last update > 1 hour

AirMass RGB

RGB composite based on the data from IR and WV
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