Alert archive / Hawaii / Wind Advisories in 2020
Wind Advisory 21, NWS Honolulu, HI
NWS Honolulu, HI issued this wind advisory at Dec 17, 2020, 3:06 PM HST for Hawaii County, Kalawao County, Hawaii. It took effect at Dec 18, 2020, 12:00 AM HST. It was in force for 28 hr.
The area
The counties it named.
The facts
- Issued
- Dec 17, 2020, 3:06 PM HST (01:06 UTC)
- In effect from
- Dec 18, 2020, 12:00 AM HST
- Expired
- Dec 19, 2020, 3:38 AM HST
- In force
- 28 hr
- Issued by
- NWS Honolulu, HI
Counties Hawaii County, HI, Kalawao County, HI
The radar
The Kamuela/Kohala Apt radar (PHKM), 57 km from the middle of the area, began a volume at 01:09 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Hilo, (PITO), launched 00:00Z, 1.1 hours before the alert went out and 150 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 323 J/kg
- Mixed-layer CIN
- -24 J/kg
- Mixed-layer LCL
- 662 m above ground
- 0-6 km bulk shear
- 2 kt
- 0-1 km storm-relative helicity
- 38 m²/s²
- 0-3 km storm-relative helicity
- 24 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
011 WWHW70 PHFO 180106 NPWHFO URGENT - WEATHER MESSAGE National Weather Service Honolulu HI 306 PM HST Thu Dec 17 2020 ...WIND ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 6 PM HST FRIDAY FOR PORTIONS OF MAUI MOLOKAI LANAI AND KAHOOLAWE... .High pressure strengthening far northeast of the state will produce strong and gusty trades beginning late tonight and continuing through Friday. Trade winds are expected to gradually weaken over the weekend. HIZ012-014>019-024>026-181415- /O.NEW.PHFO.WI.Y.0021.201218T1000Z-201219T0400Z/ Molokai Windward-Lanai Makai-Lanai Mauka-Kahoolawe- Maui Windward West-Maui Leeward West-Maui Central Valley- South Big Island-Big Island North and East-Kohala- Including the cities of Kalaupapa, Manele, Lanai City, Wailuku, Lahaina, Kaanapali, Kahului, South Point, Pahala, Hilo, Volcano, Honokaa, Kamuela, and Waikoloa 306 PM HST Thu Dec 17 2020 ...WIND ADVISORY IN EFFECT FROM MIDNIGHT TONIGHT TO 6 PM HST FRIDAY... * WHAT...East-northeast winds 20 to 35 mph with localized gusts to 50 mph expected. * WHERE...Portions of Kahoolawe, Lanai, Maui, Molokai and the Big Island Hawaii. * WHEN...From midnight tonight to 6 PM HST Friday. * IMPACTS...Winds this strong are capable of downing tents or other temporary structures, as well as downing trees and causing power outages. PRECAUTIONARY/PREPAREDNESS ACTIONS... Motorists should use extra caution. && $$ Kino
3 follow-up statements
771 WWHW70 PHFO 181335 NPWHFO URGENT - WEATHER MESSAGE National Weather Service Honolulu HI 335 AM HST Fri Dec 18 2020 ...WIND ADVISORY IN EFFECT TO 6 PM HST TODAY FOR PORTIONS OF MAUI MOLOKAI LANAI AND KAHOOLAWE... .High pressure far northeast of the state will produce strong and gusty trades through today. Trade winds are expected to gradually weaken over the weekend. HIZ012-014>019-024>026-190245- /O.CON.PHFO.WI.Y.0021.000000T0000Z-201219T0400Z/ Molokai Windward-Lanai Makai-Lanai Mauka-Kahoolawe- Maui Windward West-Maui Leeward West-Maui Central Valley- South Big Island-Big Island North and East-Kohala- Including the cities of Kalaupapa, Manele, Lanai City, Wailuku, Lahaina, Kaanapali, Kahului, South Point, Pahala, Hilo, Volcano, Honokaa, Kamuela, and Waikoloa 335 AM HST Fri Dec 18 2020 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 6 PM HST THIS EVENING... * WHAT...East-northeast winds 20 to 35 mph with localized gusts to 50 mph expected. * WHERE...Portions of Kahoolawe, Lanai, Maui, Molokai and the Big Island Hawaii. * WHEN...through 6 PM HST Friday. * IMPACTS...Winds this strong are capable of downing tents or other temporary structures, as well as downing trees and causing power outages. PRECAUTIONARY/PREPAREDNESS ACTIONS... Motorists should use extra caution. && $$
607 WWHW70 PHFO 190117 NPWHFO URGENT - WEATHER MESSAGE National Weather Service Honolulu HI 317 PM HST Fri Dec 18 2020 ...WIND ADVISORY UNTIL 6 AM HST SATURDAY FOR PORTIONS OF MAUI COUNTY AND THE BIG ISLAND... .High pressure far northeast of the state will produce strong and gusty trades through tonight. Trade winds are expected to gradually weaken over the weekend. HIZ012-014>019-024>026-191430- /O.EXT.PHFO.WI.Y.0021.000000T0000Z-201219T1600Z/ Molokai Windward-Lanai Makai-Lanai Mauka-Kahoolawe- Maui Windward West-Maui Leeward West-Maui Central Valley- South Big Island-Big Island North and East-Kohala- Including the cities of Kalaupapa, Manele, Lanai City, Wailuku, Lahaina, Kaanapali, Kahului, South Point, Pahala, Hilo, Volcano, Honokaa, Kamuela, and Waikoloa 317 PM HST Fri Dec 18 2020 ...WIND ADVISORY NOW IN EFFECT UNTIL 6 AM HST SATURDAY... * WHAT...Northeast to east winds 20 to 30 mph with localized gusts to 50 mph. * WHERE...Portions of Kahoolawe, Lanai, Maui, Molokai and the Big Island Hawaii. * WHEN...Until 6 AM HST Saturday. * IMPACTS...Winds this strong are capable of downing trees and causing power outages. PRECAUTIONARY/PREPAREDNESS ACTIONS... Motorists should use extra caution. && $$ Birchard
796 WWHW70 PHFO 191338 NPWHFO URGENT - WEATHER MESSAGE National Weather Service Honolulu HI 338 AM HST Sat Dec 19 2020 HIZ012-014>019-024>026-191445- /O.CAN.PHFO.WI.Y.0021.000000T0000Z-201219T1600Z/ Molokai Windward-Lanai Makai-Lanai Mauka-Kahoolawe- Maui Windward West-Maui Leeward West-Maui Central Valley- South Big Island-Big Island North and East-Kohala- Including the cities of Kalaupapa, Manele, Lanai City, Wailuku, Lahaina, Kaanapali, Kahului, South Point, Pahala, Hilo, Volcano, Honokaa, Kamuela, and Waikoloa 338 AM HST Sat Dec 19 2020 ...WIND ADVISORY IS CANCELLED... Winds have been gradually diminishing overnight, and have fallen below advisory criteria. $$
The office that day
Everything else NWS Honolulu, HI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Dec 17, 3:15 PM HST | Gale Warning | HFO | 36 hr | |
| Dec 17, 3:15 PM HST | Small Craft Advisory | HFO | 4 days | |
| Dec 18, 3:43 AM HST | Areal Flood Advisory | HFO | Hawaii | 6 hr |
| Dec 18, 11:38 AM HST | High Surf Advisory | HFO | Honolulu, Kalawao | 28 hr |
Nearby
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.