Alert archive / Hawaii / Wind Advisories in 2021
Wind Advisory 17, NWS Honolulu, HI
NWS Honolulu, HI issued this wind advisory at Sep 3, 2021, 3:11 AM HST for Hawaii County, Kalawao County, Hawaii. It took effect at Sep 3, 2021, 6:00 AM HST. It was in force for 14 hr.
The area
The counties it named.
The facts
- Issued
- Sep 3, 2021, 3:11 AM HST (13:11 UTC)
- In effect from
- Sep 3, 2021, 6:00 AM HST
- Expired
- Sep 3, 2021, 8:00 PM HST
- In force
- 14 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 13:13 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 12:00Z, 1.2 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
- 15 J/kg
- Mixed-layer CIN
- -20 J/kg
- Mixed-layer LCL
- 901 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- -58 m²/s²
- 0-3 km storm-relative helicity
- -19 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
967 WWHW70 PHFO 031311 NPWHFO URGENT - WEATHER MESSAGE National Weather Service Honolulu HI 311 AM HST Fri Sep 3 2021 ...WIND ADVISORY FOR PORTIONS OF MAUI AND HAWAII COUNTIES TODAY... .High pressure strengthening north of the area will bring gusty trade winds today. Winds will be especially strong where they accelerate over ridgetops, and where they get channeled through valleys and gaps in terrain. HIZ015-016-018-026-027-042>046-051-052-040215- /O.NEW.PHFO.WI.Y.0017.210903T1600Z-210904T0600Z/ Lanai Mauka-Kahoolawe-Maui Leeward West-Kohala- Big Island Interior-Lanai Windward-Lanai Leeward-Lanai South- Maui Central Valley North-Maui Central Valley South- Big Island South-Big Island Southeast- Including the cities of Lanai City, Lahaina, Kaanapali, Kawaihae, Waikoloa, Waikii, Puuanahulu, Bradshaw Field, Saddle Road Above 5000 feet, Shipwreck Beach, Kaumalapau Harbor, Manele, Kahului, Maalaea, Ocean View, South Point, and Pahala 311 AM HST Fri Sep 3 2021 ...WIND ADVISORY IN EFFECT FROM 6 AM THIS MORNING TO 8 PM HST THIS EVENING... * WHAT...Trade winds 15 to 30 mph with localized gusts near 50 mph. * WHERE...Portions of Kahoolawe, Lanai, Maui and the Big Island Hawaii. * WHEN...From 6 AM this morning to 8 PM HST this evening. * IMPACTS...Winds this strong can knock down tree branches, blow away tents and awnings, and make it difficult to steer, especially for drivers of high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Watch out for falling tree branches when walking or driving. Make sure tents and awnings are secure or take them down. Be prepared for localized power outages. && $$ Birchard
1 follow-up statement
537 WWHW70 PHFO 040126 NPWHFO URGENT - WEATHER MESSAGE National Weather Service Honolulu HI 326 PM HST Fri Sep 3 2021 ...WIND ADVISORY FOR PORTIONS OF MAUI AND HAWAII COUNTIES... .High pressure strengthening north of the area will bring gusty trade winds into the evening hours. Winds will be especially strong where they accelerate over ridgetops, and where they get channeled through valleys and gaps in terrain. HIZ015-016-018-026-027-042>046-051-052-040600- /O.CON.PHFO.WI.Y.0017.000000T0000Z-210904T0600Z/ Lanai Mauka-Kahoolawe-Maui Leeward West-Kohala- Big Island Interior-Lanai Windward-Lanai Leeward-Lanai South- Maui Central Valley North-Maui Central Valley South- Big Island South-Big Island Southeast- Including the cities of Lanai City, Lahaina, Kaanapali, Kawaihae, Waikoloa, Waikii, Puuanahulu, Bradshaw Field, Saddle Road Above 5000 feet, Shipwreck Beach, Kaumalapau Harbor, Manele, Kahului, Maalaea, Ocean View, South Point, and Pahala 326 PM HST Fri Sep 3 2021 ...WIND ADVISORY REMAINS IN EFFECT UNTIL 8 PM HST THIS EVENING... * WHAT...Northeast winds 20 to 30 mph with localized gusts over 50 mph. * WHERE...Portions of Kahoolawe, Lanai, Maui and the Big Island Hawaii, with the highest winds expected over ridgetops, and areas where the winds are channeled through valleys and gaps in terrain. * WHEN...Until 8 PM HST this evening. * IMPACTS...Winds this strong can knock down tree branches, blow away tents and awnings, and make it difficult to steer, especially for drivers of high profile vehicles. Blowing dust is likely in the Waimea area of the Big Island. PRECAUTIONARY/PREPAREDNESS ACTIONS... Watch out for falling tree branches when walking or driving. Make sure tents and awnings are secure or take them down. Be prepared for localized power outages. && $$ M Ballard
The office that day
Everything else NWS Honolulu, HI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 2, 3:43 PM HST | Fire Weather Watch | HFO | 12 hr | |
| Sep 2, 7:19 PM HST | Areal Flood Advisory | HFO | Hawaii | 88 min |
| Sep 3, 3:14 AM HST | Red Flag Warning | HFO | 38 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.