Alert archive / Hawaii / High Wind Watches in 2021
High Wind Watch 1, NWS Honolulu, HI
NWS Honolulu, HI issued this high wind watch at Nov 28, 2021, 3:52 AM HST for Hawaii County, Hawaii. It took effect at Nov 28, 2021, 8:00 PM HST. It was in force for .
The area
The counties it named.
The facts
- Issued
- Nov 28, 2021, 3:52 AM HST (13:52 UTC)
- In effect from
- Nov 28, 2021, 8:00 PM HST
- Expired
- Nov 28, 2021, 1:53 PM HST
- In force
- Issued by
- NWS Honolulu, HI
County Hawaii County, HI
The nearest sounding before it
Hilo, (PITO), launched 12:00Z, 1.9 hours before the alert went out and 56 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
- 45 J/kg
- Mixed-layer CIN
- -431 J/kg
- Mixed-layer LCL
- 713 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- -2 m²/s²
- 0-3 km storm-relative helicity
- 22 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
536 WWHW70 PHFO 281352 NPWHFO URGENT - WEATHER MESSAGE National Weather Service Honolulu HI 352 AM HST Sun Nov 28 2021 ...HIGH WIND WATCH IN EFFECT FROM THIS EVENING THROUGH MONDAY AFTERNOON FOR THE BIG ISLAND SUMMITS... .A low pressure system approaching the Big Island from the north will produce strong winds over the summits of Mauna Kea and Mauna Loa later tonight through Monday afternoon. HIZ028-290300- /O.NEW.PHFO.HW.A.0001.211129T0600Z-211130T0400Z/ Big Island Summits- Including the city of Mauna Loa and Mauna Kea Above 8000 feet 352 AM HST Sun Nov 28 2021 ...HIGH WIND WATCH IN EFFECT FROM THIS EVENING THROUGH MONDAY AFTERNOON... * WHAT...North winds 50 to 60 mph with localized gusts over 65 mph are possible. * WHERE...Big Island Summits of Mauna Kea and Mauna Loa. * WHEN...From this evening through Monday afternoon. * IMPACTS...Travel could be difficult, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Take precautions now to protect property. Tie down loose objects or move them to a sheltered location. A High Wind Watch for the summits means there is the potential for a hazardous high wind event. Sustained winds of at least 56 mph or gusts of 66 mph or stronger may occur. Continue to monitor the latest forecasts. && $$ RCB
1 follow-up statement
157 WWHW70 PHFO 282353 NPWHFO URGENT - WEATHER MESSAGE National Weather Service Honolulu HI 153 PM HST Sun Nov 28 2021 HIZ028-300015- /O.UPG.PHFO.HW.A.0001.211129T0600Z-211130T0400Z/ /O.NEW.PHFO.HW.W.0002.211129T0600Z-211130T0000Z/ Big Island Summits- Including the city of Mauna Loa and Mauna Kea Above 8000 feet 153 PM HST Sun Nov 28 2021 ...HIGH WIND WARNING IN EFFECT FROM 8 PM THIS EVENING TO 2 PM HST MONDAY... * WHAT...North winds 50 to 60 mph with gusts up to 65 mph are expected. * WHERE...Big Island summits of Mauna Kea and Mauna Loa. * WHEN...From this evening through early Monday afternoon. * IMPACTS...Winds this strong can blow away unsecured objects and make it difficult to drive, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Be prepared for road-closures. Postpone travel to the summits until conditions improve. && $$ HIZ022-300000- /O.NEW.PHFO.WI.Y.0019.211129T0600Z-211130T0000Z/ Haleakala Summit- Including the city of Haleakala National Park Above 6000 feet 153 PM HST Sun Nov 28 2021 ...WIND ADVISORY IN EFFECT FROM 8 PM THIS EVENING TO 2 PM HST MONDAY... * WHAT...Northeast winds 45 to 50 mph with gusts around 55 mph are expected. * WHERE...Haleakala Summit. * WHEN...From this evening through early Monday afternoon. * IMPACTS...Winds this strong can blow away unsecured objects and make it difficult to drive, especially for high profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... Consider postponing travel to the summits until conditions improve. If you must travel to the summits, use extra caution walking and driving. Be careful opening or closing doors. && $$
The office that day
Everything else NWS Honolulu, HI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Nov 27, 3:35 PM HST | Small Craft Advisory | HFO | 3 days | |
| Nov 28, 1:53 PM HST | High Wind Warning | HFO | Hawaii | 26 hr |
| Nov 28, 1:53 PM HST | Wind Advisory | HFO | Hawaii, Honolulu, Kauai, Kalawao | 26 hr |
Nearby
High Wind Watches in Hawaii, 2021Every high wind watch in 2021
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.