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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.

DOUGLAS Current Status

...DOUGLAS DEGENERATES TO A POST-TROPICAL LOW... ...WILL CROSS THE INTERNATIONAL DATE LINE LATER TODAY...

Current Wind Speed 30 knots / 35 MPH

Max Predicted Wind Speed 30 knots / 35 MPH at

DOUGLAS Land Hazards

DOUGLAS Tracker

DOUGLAS Satellite Loop

DOUGLAS Alternate Tracking Map

DOUGLAS Spaghetti Models

Spaghetti models for DOUGLAS can be found here:

DOUGLAS spaghetti models page »

DOUGLAS Watches and Warnings

Post-Tropical Cyclone DOUGLAS Tropical Cyclone Update

Post-Tropical Cyclone DOUGLAS Public Advisory

000
WTPA32 PHFO 291435
TCPCP2
 
BULLETIN
Post-Tropical Cyclone Douglas Advisory Number  37
NWS Central Pacific Hurricane Center Honolulu HI   EP082020
500 AM HST Wed Jul 29 2020
 
...DOUGLAS DEGENERATES TO A POST-TROPICAL LOW...
...WILL CROSS THE INTERNATIONAL DATE LINE LATER TODAY...
 
 
SUMMARY OF 500 AM HST...1500 UTC...INFORMATION
----------------------------------------------
LOCATION...24.7N 175.4W
ABOUT 1135 MI...1830 KM WNW OF HONOLULU HAWAII
ABOUT 270 MI...435 KM SSE OF MIDWAY ISLAND
MAXIMUM SUSTAINED WINDS...35 MPH...55 KM/H
PRESENT MOVEMENT...W OR 275 DEGREES AT 23 MPH...37 KM/H
MINIMUM CENTRAL PRESSURE...1012 MB...29.89 INCHES
 
 
WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY...
 
The Tropical Storm Warning for portions of the Papahanaumokuakea
Marine National Monument from Maro Reef to Lisianski has been
discontinued.
 
SUMMARY OF WATCHES AND WARNINGS IN EFFECT...
 
None.
 
 
DISCUSSION AND OUTLOOK
----------------------
At 500 AM HST (1500 UTC), the center of Post-Tropical Cyclone
Douglas was located near latitude 24.7 North, longitude 175.4 West.
The post-tropical cyclone is moving toward the west near 23 mph (37
km/h), and this general motion is expected to continue until Douglas
crosses the International Date Line later today.
 
Maximum sustained winds are near 35 mph (55 km/h) with higher gusts.
Weakening is forecast, and Douglas is expected to dissipate shortly 
after crossing the Date Line.
 
The estimated minimum central pressure is 1012 mb (29.89 inches).
 
 
HAZARDS AFFECTING LAND
----------------------
SURF: Large seas and swells generated by Douglas will impact
portions of the Papahanaumokuakea Marine National Monument west of
Maro Reef today, then diminish tonight.
 
 
NEXT ADVISORY
-------------
This is the last public advisory issued by the Central Pacific
Hurricane Center on this system. Additional information on the
post-tropical low can be found in high seas forecasts issued by the
National Weather Service under AWIPS head HFOHSFNP, WMO header
FZPN40 PHFO, and on the web at https://www.weather.gov/hfo/HSFNP.
 
$$
Forecaster Birchard

Public Advisory not available for this storm.

Post-Tropical Cyclone DOUGLAS Forecast Discussion

000
WTPA42 PHFO 291452 CCA
TCDCP2
 
Post-Tropical Cyclone Douglas Discussion Number  37...CORRECTED
NWS Central Pacific Hurricane Center Honolulu HI   EP082020
452 AM HST Wed Jul 29 2020

A cluster of thunderstorms north of Douglas' center is producing an 
impressive amount of lightning this morning, but is not indicative 
of system reorganization. While these thunderstorms are indeed 
associated with Douglas' deteriorating circulation, they are removed 
from the center, and will soon be sheared away by persistent 
southerly vertical wind shear. Satellite imagery shows the exposed 
low-level circulation center becoming increasingly elongated, while 
an earlier ASCAT pass indicated little in the way of westerly flow 
in the southern semicircle. Douglas has degenerated into a post- 
tropical remnant low (and may already be an open wave) with maximum 
winds on the north side estimated to be near 30 kt.  

With Douglas' initial motion vector of 275/20 kt, associated 
hazards have moved west of the Papahanaumokuakea Marine National 
Monument, and the Tropical Storm Warning has been discontinued. A 
strong low-level ridge to the north will steer Douglas rapidly 
westward, with the remnant low expected to cross the International 
Date Line later today. As the remnant low rounds the ridge, it is 
expected to gain some latitude over the next 24 hours or so before 
dissipating, in line with global model guidance and the previous 
forecast.

This is the last advisory issued by the Central Pacific Hurricane 
Center on Douglas. Additional information on this system can be 
found in the High Seas Forecasts issued by the National Weather 
Service in Honolulu under AWIPS header HFOHSFNP and WMO header 
FZPN40 PHFO.


FORECAST POSITIONS AND MAX WINDS
 
INIT  29/1500Z 24.7N 175.4W   30 KT  35 MPH...POST-TROP/REMNT LOW
 12H  30/0000Z 25.0N 178.6W   30 KT  35 MPH...POST-TROP/REMNT LOW
 24H  30/1200Z 25.9N 177.2E   25 KT  30 MPH...POST-TROP/REMNT LOW
 36H  31/0000Z...DISSIPATED
 
$$
Forecaster Birchard

DOUGLAS storm path from NHC

Time Speed Location Status
30 knots 24.7, -175.4
30 knots 25.0, -178.6 POST-TROPICAL CYCLONE
25 knots 25.9, 177.2 POST-TROPICAL CYCLONE
0 knots translation missing: en.DISSIPATED


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