Tropical Cyclone Douglas Update # 6 for July 25th, 2020

HIRSC - Weather Team continues to have watchful eyes on Tropical Cyclone Douglas (A category 2 hurricane/tropical cyclone) with winds of 105 mph.


All based on Weather Team assessments on the potential impacts for Hawaii Island and the island is expected to see some strong winds along with moderate to heavy showers with the possibility of thunderstorms in parts of Hawaii Island. The island should start seeing some effects beginning this Saturday afternoon into Sunday.


Tropical Storm Warning and Flash Flood Watch has been issued for the Island of Hawaii and remains in effect until further notice.


Closures have been announced and listed in the post.


Just as a reminder to all of our followers, now is the time to be completing preparation work and having all supplies ready for the potential of weather impacts related to Douglas closely approaching the state.


HIRSC - Hawaii Island Emergency Operations and Action Plans are in place and will out in the field beginning today providing updates of events and things happening around the island ahead of the potential weather impacts related to Douglas' approach. Live Update is scheduled for 9 pm Saturday evening.


Published by: HIRSC - Weather Team and Utah (Springdale) Team

info@hiradioscannercommunity.com

Tropical Cyclone Douglas Advisory as of 8 am HST - 7/25/2020

Hurricane Douglas Intermediate Advisory Number 21A
NWS Central Pacific Hurricane Center Honolulu HI   EP082020
800 AM HST Sat Jul 25 2020

...HURRICANE DOUGLAS CONTINUES TO MOVE WEST-NORTHWEST TOWARD
HAWAII...


SUMMARY OF 800 AM HST...1800 UTC...INFORMATION
----------------------------------------------
LOCATION...19.1N 149.1W
ABOUT 390 MI...625 KM E OF HILO HAWAII
ABOUT 590 MI...950 KM ESE OF HONOLULU HAWAII
MAXIMUM SUSTAINED WINDS...100 MPH...160 KM/H
PRESENT MOVEMENT...WNW OR 285 DEGREES AT 18 MPH...30 KM/H
MINIMUM CENTRAL PRESSURE...982 MB...29.00 INCHES


WATCHES AND WARNINGS
--------------------
CHANGES WITH THIS ADVISORY...

None.

SUMMARY OF WATCHES AND WARNING IN EFFECT...

A Tropical Storm Warning is in effect for...
* Hawaii County
* Maui County, including the islands of Maui, Lanai, Molokai and
Kahoolawe

A Hurricane Watch is in effect for...
* Hawaii County
* Maui County, including the islands of Maui, Lanai, Molokai and
Kahoolawe
* Oahu

A Tropical Storm Watch is in effect for...
* Kauai County, including the islands of Kauai and Niihau.

A Tropical Storm Warning means that tropical storm conditions are
expected somewhere within the warning area within 36 hours.

A Hurricane Watch means that hurricane conditions are possible
within the watch area, in this case within the next 36 to 48 hours.

A Tropical Storm Watch means that tropical storm conditions are
possible within the watch area, in this case within the next 36 to
48 hours.

Interests elsewhere in the main Hawaiian Islands, and in the
Papahanaumokuakea Marine National Monument, should monitor
the progress of this system.

For storm information specific to your area, please monitor
products issued by the National Weather Service office in
Honolulu Hawaii.


DISCUSSION AND OUTLOOK
----------------------
At 800 AM HST (1800 UTC), a U.S. Air Force 53rd Weather 
Reconnaissance aircraft located the center of Hurricane Douglas 
near latitude 19.1 North, longitude 149.1 West. Douglas is moving 
toward the west-northwest near 18 mph (30 km/h). This motion
is expected to continue with a slight decrease in forward speed
today, followed by a slight turn toward the west tonight through
Monday. On the forecast track, Douglas will be near the main
Hawaiian Islands late tonight through Sunday night.

Maximum sustained winds are near 100 mph (160 km/h) with higher
gusts. Gradual weakening is expected through the weekend. However,
Douglas is still forecast to be near hurricane strength when it
nears the islands.

Hurricane-force winds extend outward up to 25 miles (35 km) from
the center and tropical-storm-force winds extend outward up to 105
miles (165 km).

The estimated minimum central pressure is 982 mb (29.00 inches).


HAZARDS AFFECTING LAND
----------------------
WIND:  Hurricane conditions are possible across portions of the
main Hawaiian Islands late tonight through Sunday night. Tropical
Storm conditions are expected across Hawaii County and Maui County
beginning late tonight or Sunday. Tropical Storm conditions are
possible across Kauai County late Sunday or Sunday night.

SURF:  Large swells generated by Douglas are expected to affect
the Hawaiian Islands this weekend, and storm surge of around 2 
feet above normal tides is expected near the center of Douglas. The 
large swells and surge will produce life threatening and 
potentially damaging surf along exposed shores.

RAINFALL:  Heavy rainfall associated with Douglas is expected to
affect portions of the main Hawaiian Islands from late tonight
through Monday. Total rain accumulations of 5 to 10 inches
are possible from Maui County westward to Kauai County, with
the greatest amounts in elevated terrain. This rain may result
in life-threatening flash flooding and land slides, as well as
rapid water level rises on small streams. Douglas is expected to
produce 2 to 5 inches of rainfall over the northern half of the
Big Island.

Key messages for Douglas can be found in the Tropical Cyclone
Discussion under AWIPS header HFOTCDCP2 and WMO header WTPA32 PHFO.


NEXT ADVISORY
-------------
Next complete advisory at 1100 AM HST.

Hurricane Hunters Observations from Douglas:

II. PACIFIC REQUIREMENTS
    1. HURRICANE DOUGLAS
       FLIGHT ONE - TEAL 78          FLIGHT TWO - TEAL 77
       A. 25/1730Z,2330Z             A. 26/0530Z,1130Z
       B. AFXXX 0208E DOUGLAS        B. AFXXX 0308E DOUGLAS
       C. 25/1545Z                   C. 26/0400Z
       D. 19.1N 149.0W               D. 20.1N 151.9W
       E. 25/1700Z TO 25/2330Z       E. 26/0500Z TO 26/1130Z
       F. SFC TO 10,000 FT           F. SFC TO 10,000 FT

    2. OUTLOOK FOR SUCCEEDING DAY: CONTINUE 6-HRLY FIXES IF CONDITIONS
       DICTATE.

Closures List for Hawaii Island:


  • From 7 pm Friday 7/24/2020 until further notice, All-East Hawaii Beach Parks from Keokea Beach Park in North Kohala to Whittington Beach Park in Ka'u will be closed.

  • At 2 PM Saturday 7/25/2020: All backcountry areas of Hawaii Volcanoes National Park will be closed and all visitors in those areas need to exit by 2 pm Saturday. All backcountry and camping permits have been canceled for this weekend.

  • Kaloko-Honokohau National Historical Park will be closed all day Sunday 7/26/2020

  • All Eastside State Parks from MacKenzie SP to Kalopa SP will be CLOSED 7/25 until an all-clear has been given and storm damage assessments have been conducted.

  • Waipio Valley Road will be closed to the general public begin 7 am Saturday morning (7/25/2020) until further notice.

Hawaii County Preparation Guide


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