Cyclocane

( cyclocane is a CYCLOne and hurriCANE tracker by hayley )

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This is the final warning / advisory for this storm as it has weakened below warning levels and/or the storm system is no longer a tropical cyclone.

Go to the main page to see active storms.

Hurricane Time Machine

SAM Current Status

...SAM TRANSITIONS TO A POWERFUL POST-TROPICAL CYCLONE OVER THE FAR NORTH ATLANTIC BETWEEN NEWFOUNDLAND AND ICELAND... ...THIS IS THE LAST ADVISORY...

Current Wind Speed 70 knots / 80 MPH

Max Predicted Wind Speed 70 knots / 80 MPH at

Current Watches/Warnings / Radar / Satellite

current US watches/warnings

map of current weather alerts in the United States

current radar loop

NWS weather radar loop of the coastal areas

If you're looking for other US radar loops, check out Radar Monster.

future radar imagery

future radar image of the Atlantic Ocean basin showing future possible storms and future locations of current storms

(above image is an example of the Western North Atlantic page - see Atlantic future radar page for a full set of images)

If a tropical storm or hurricane is threatening land, you can check my future radar for an idea of what radar might look like as the storm approaches.

SAM Land Hazards

NWS Local Hurricane Statements

SAM Tracker

SAM Satellite Loop

visible satellite loop of Post-Tropical Cyclone SAM from wisc.edu

SAM Alternate Tracking Map

SAM Spaghetti Models

Spaghetti models for SAM can be found here:

SAM spaghetti models page »

SAM Watches and Warnings

National Hurricane Center image showing current coastal watches and warnings and future SAM predicted path

Post-Tropical Cyclone SAM Tropical Cyclone Update

Post-Tropical Cyclone SAM Public Advisory

000
WTNT33 KNHC 050834
TCPAT3
 
BULLETIN
Post-Tropical Cyclone Sam Advisory Number  51
NWS National Hurricane Center Miami FL       AL182021
900 AM GMT Tue Oct 05 2021
 
...SAM TRANSITIONS TO A POWERFUL POST-TROPICAL CYCLONE OVER THE FAR
NORTH ATLANTIC BETWEEN NEWFOUNDLAND AND ICELAND...
...THIS IS THE LAST ADVISORY...
 
 
SUMMARY OF 900 AM GMT...0900 UTC...INFORMATION
----------------------------------------------
LOCATION...51.0N 39.4W
ABOUT 690 MI...1110 KM ENE OF CAPE RACE NEWFOUNDLAND
ABOUT 1110 MI...1785 KM SW OF REYKJAVIK ICELAND
MAXIMUM SUSTAINED WINDS...80 MPH...130 KM/H
PRESENT MOVEMENT...N OR 10 DEGREES AT 23 MPH...37 KM/H
MINIMUM CENTRAL PRESSURE...970 MB...28.64 INCHES
 
 
WATCHES AND WARNINGS
--------------------
There are no coastal watches or warnings in effect.
 
 
DISCUSSION AND OUTLOOK
----------------------
At 900 AM GMT (0900 UTC), the center of Post-Tropical Cyclone Sam
was located near latitude 51.0 North, longitude 39.4 West. The
post-tropical cyclone is moving toward the north near 23 mph (37
km/h), and this general motion should continue today with a further
decrease in forward speed.  A slow east-northeastward motion is 
forecast to begin by late today, and a northeastward motion is 
expected Wednesday and Wednesday night.
 
Maximum sustained winds have decreased to near 80 mph (130 km/h) 
with higher gusts.  Although gradual weakening is forecast during 
the next few days, Sam is expected to remain a powerful 
post-tropical cyclone over the north Atlantic today.
 
Hurricane-force winds extend outward up to 80 miles (130 km) from
the center and gale-force winds extend outward up to 460 miles (740 
km).
 
The estimated minimum central pressure is 970 mb (28.64 inches).
 
 
HAZARDS AFFECTING LAND
----------------------
Key messages for Sam can be found in the Tropical Cyclone Discussion
under AWIPS header MIATCDAT3 and WMO header WTNT43 KNHC, and on the
web at hurricanes.gov/graphics_at3.shtml?key_messages.
 
SURF:  Swells generated by Sam will impact the northern Leeward
Islands, the Greater Antilles, portions of the Bahamas, and
southeastern Newfoundland through midweek.  These swells could
cause life-threatening surf and rip current conditions. Please
consult products from your local weather office.
 
 
NEXT ADVISORY
-------------
This is the last public advisory issued by the National Hurricane
Center on Sam. Additional information on this system can be found 
in High Seas Forecasts issued by the National Weather Service, 
under AWIPS header NFDHSFAT1, WMO header FZNT01 KWBC, and online at 
ocean.weather.gov/shtml/NFDHSFAT1.php.
 
$$
Forecaster Stewart

Public Advisory not available for this storm.

Post-Tropical Cyclone SAM Forecast Discussion

780 
WTNT43 KNHC 050838
TCDAT3
 
Post-Tropical Cyclone Sam Discussion Number  51
NWS National Hurricane Center Miami FL       AL182021
900 AM GMT Tue Oct 05 2021
 
Sam's low-level circulation center has become exposed on the south 
side of an east-to-west oriented cloud band containing cloud tops 
that have warmed to around -50 deg C. The cyclone's overall cloud 
pattern in satellite imagery resembles that of an occluded 
extratropical low pressure system, and surface analyses from the 
NOAA Ocean Prediction Center indicate that Sam's inner-core is now 
interacting with a frontal system.  Furthermore, the system is 
located over sea-surface temperatures of around 14 deg C. Although 
the system likely still has a warm-core thermal structure in the 
mid- and upper-levels of the troposphere based on earlier 04/2321Z 
AMSU-A/-B data, the low-level circulation now is comprised of an 
extensive field of cold-air stratocumulus clouds. Based on these 
data, Sam has made the transition to an extratropical cyclone over 
the far north Atlantic.  The initial wind speed has been lowered to 
70 kt based on a standard decay rate.

The initial motion estimate is northward or 010/20 kt. 
Extratropical-Sam has been moving north-northeastward at 35 kt 
since the previous advisory, but the latest global and regional 
models are all in very good agreement that the system will slow 
down significantly during the next 6-12 hours as it interacts with 
an approaching baroclinic mid- to upper-level trough/low. By late 
Tuesday, the post-tropical cyclone should turn east-northeastward, 
and then make a counter-clockwise loop southwest of Iceland on 
Wednesday. By Thursday, the large cyclone is expected to move 
east-northeastward or eastward and pass very near the southern coast 
of Iceland on days 4 and 5 as a weakening extratropical low pressure 
system. The new NHC track forecast is very similar to the previous 
advisory track, and lies close to the tightly packed simple- and 
corrected-consensus track models.
 
Extratropical-Sam is expected to maintain hurricane-force winds for 
the next 12-18 hours, followed by a slow weakening trend as the 
cyclone loses its baroclinic forcing.  However, Post-Tropical-Sam 
is still expected to pass close to Iceland in the 96-120-h period as 
an expansive low pressure system producing gale-force winds over a 
very large area.

This is the last advisory issued by the National Hurricane Center on 
Sam.  Additional information on this system can be found in High 
Seas Forecasts issued by the National Weather Service, under AWIPS 
header NFDHSFAT1, WMO header FZNT01 KWBC, and online at 
ocean.weather.gov/shtml/NFDHSFAT1.php.
 
Key Messages:
 
1. Swells generated by Sam will impact the northern Leeward
Islands, the Greater Antilles, portions of the Bahamas, and
southeastern Newfoundland through midweek.  These swells
could cause life-threatening surf and rip current conditions.
Please consult products from your local weather office.
 
 
FORECAST POSITIONS AND MAX WINDS
 
INIT  05/0900Z 51.0N  39.4W   70 KT  80 MPH...POST-TROP/EXTRATROP
 12H  05/1800Z 52.1N  38.9W   65 KT  75 MPH...POST-TROP/EXTRATROP
 24H  06/0600Z 52.8N  35.1W   60 KT  70 MPH...POST-TROP/EXTRATROP
 36H  06/1800Z 54.3N  30.0W   55 KT  65 MPH...POST-TROP/EXTRATROP
 48H  07/0600Z 57.9N  24.6W   50 KT  60 MPH...POST-TROP/EXTRATROP
 60H  07/1800Z 61.8N  23.9W   45 KT  50 MPH...POST-TROP/EXTRATROP
 72H  08/0600Z 62.7N  27.4W   45 KT  50 MPH...POST-TROP/EXTRATROP
 96H  09/0600Z 61.7N  26.2W   40 KT  45 MPH...POST-TROP/EXTRATROP
120H  10/0600Z 63.6N  15.0W   40 KT  45 MPH...POST-TROP/EXTRATROP
 
$$
Forecaster Stewart

SAM storm path from NHC

Time Speed Location Status
70 knots 51.0, -39.4 POST-TROPICAL CYCLONE
65 knots 52.1, -38.9 POST-TROPICAL CYCLONE
60 knots 52.8, -35.1 POST-TROPICAL CYCLONE
55 knots 54.3, -30.0 POST-TROPICAL CYCLONE
50 knots 57.9, -24.6 POST-TROPICAL CYCLONE
45 knots 61.8, -23.9 POST-TROPICAL CYCLONE
45 knots 62.7, -27.4 POST-TROPICAL CYCLONE
40 knots 61.7, -26.2 POST-TROPICAL CYCLONE
40 knots 63.6, -15.0 POST-TROPICAL CYCLONE


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