Verification of Atlantic ghost storm tracks of November-December 2020

January 22, 2021

I falsely detected (sub)tropical cyclogenesis in Atlantic (north of equator and west of Greenwich) 58 times in November thru December of 2020. Tracks were made of 19 systems.

In the calculations, crossover into East Pacific as a tropical cyclone is considered equal to dissipation.

At the lead time of 1 day (24 hours), there were 2 false detections.
At the lead time of 2 days (48 hours), there was 2 false detections.
At the lead time of 3 days (72 hours), there were 5 false detections.
At the lead time of 4 days (96 hours), there were 8 false detections.
At the lead time of 5 days (120 hours), there were 7 false detections.
At the lead time of 6 days (144 hours), there were 6 false detections.
At the lead time of 7 days (168 hours), there were 6 false detections.
At the lead time of 8 days (192 hours), there were 4 false detections.
At the lead time of 9 days (216 hours), there were 3 false detections.
At the lead time of 10 days (240 hours), there were 3 false detections.
At the lead time of 11 days (264 hours), there were 4 false detections.
At the lead time of 12 days (288 hours), there were 3 false detections.
At the lead time of 13 days (312 hours), there were 3 false detections.
At the lead time of 14 days (336 hours), there were 2 false detections.
At the lead time of 15 days (360 hours), there were 2 false detections.
At the lead time of 16 days (384 hours), there were 2 false detections.
At the lead time of 17 days (408 hours), there were 2 false detections.
At the lead time of 18 days (432 hours), there were 14 false detections.
At the lead time of 19 days (456 hours), there were 10 false detections.
At the lead time of 20 days (480 hours), there were 11 false detections.

Ghost storm L#92

This is best identifiable with the 1006mbar low west of Brittany in this synoptic chart. These tracks began in October.

November 3, 06Z:

Ghost storm L#93

This was an area of interest.

November 3, 06Z:

November 8, 18Z:

November 9, 12Z:

November 11, 12Z:

November 15, 12Z:

November 16, 12Z:

November 18, 12Z:

System L#94

was not a ghost storm. Rather, it was Theta.

Ghost storm L#95

I have no idea what this is.

November 9, 12Z:

November 11, 12Z:

November 15, 12Z:

November 16, 12Z:

Ghost storm L#96

This is something bizarre.

November 9, 12Z:

Ghost storm L#97

These are identifiable with nothing.

November 11, 12Z:

November 16, 12Z:

Ghost storm L#98

This is just another Caribbean ghost.

November 16, 12Z:

Ghost storm L#99

This is laughable.

November 17, 12Z:

Ghost storm L#100

This is identifiable with the trough, which is near 55W between roughly 22N-38N in the following synoptic chart.

November 23, 18Z:

Ghost storm L#101

This was Invest 90L.

November 23, 18Z:

November 24, 12Z:

November 24, 18Z:

November 25, 12Z:

November 26, 12Z:

November 27, 12Z:

November 28, 12Z:

November 29, 12Z:

Ghost storm L#102

These aren't identifiable at all.

November 24, 12Z:

November 27, 12Z:

November 28, 12Z:

November 29, 12Z:

November 30, 18Z:

Ghost storm L#103

This is best identifiable with a trough, extending north from Suriname in the following synoptic chart.

November 30, 18Z:

December 1, 12Z:

December 2, 12Z:

December 2, 18Z:

December 3, 12Z:

December 5, 12Z:

December 6, 12Z:

December 6, 18Z:

December 7, 12Z:

December 8, 12Z:

Ghost storm L#104

This was the 1014 mbar low near 40N 50W in the following synoptic chart.

December 4, 18Z:

Ghost storm L#105

This is most identifiable with a trough, extending north of Madeira and west of continental Portugal in the following synoptic chart.

December 6, 18Z:

Ghost storm L#106

This is best identifiable with a trough, extending along Lesser Antilles in the following synoptic chart.

December 15, 12Z:

Ghost storm L#107

This is identifiable with an extratropical low, located near 40N 45W in the following synoptic chart.

December 24, 12Z:

December 25, 12Z:

Ghost storm L#108

This is best identifiable with the end of a front, near Yucatan in the following synoptic chart.

December 24, 12Z:

December 25, 12Z:

December 26, 12Z:

December 28, 12Z:

Ghost storm L#109

This is identifiable with the 993mbar extratropical low, located just west of the Azores in following synoptic chart. These tracks continued in January (as L#01).