Alert archive / Hawaii / Wind Advisories in 2017
Wind Advisory 21, NWS Honolulu, HI
NWS Honolulu, HI issued this wind advisory at Apr 29, 2017, 2:54 PM HST for Hawaii County, Hawaii. It was in force for 13 hr.
The area
The counties it named.
The facts
- Issued
- Apr 29, 2017, 2:54 PM HST (00:54 UTC)
- Expired
- Apr 30, 2017, 3:56 AM HST
- In force
- 13 hr
- Issued by
- NWS Honolulu, HI
County Hawaii County, HI
The radar
The South Shore radar (PHWA), 57 km from the middle of the area, began a volume at 00:57 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, 0.9 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
- 14 J/kg
- Mixed-layer CIN
- -62 J/kg
- Mixed-layer LCL
- 1651 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 140 m²/s²
- 0-3 km storm-relative helicity
- 127 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
The text
As transmitted.
724 WWHW70 PHFO 300054 NPWHFO URGENT - WEATHER MESSAGE National Weather Service Honolulu HI 254 PM HST Sat Apr 29 2017 ...HIGH WIND WARNING FOR THE BIG ISLAND SUMMITS THROUGH SUNDAY NIGHT... ...WIND ADVISORY FOR LOWER ELEVATIONS OF THE BIG ISLAND... .A Kona low moving close to the islands will bring strong south to southwest winds to the Big Island through Sunday. HIZ028-301430- /O.CON.PHFO.HW.W.0008.000000T0000Z-170501T1600Z/ Big Island Summits- 254 PM HST Sat Apr 29 2017 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 6 AM HST MONDAY... * TIMING...Through Sunday night. * WINDS...Southwest winds increasing to 55 to 70 mph with gusts to 80 mph. * IMPACTS...Dangerously strong winds will make driving hazardous. Travel to summit areas should be delayed until winds subside. PRECAUTIONARY/PREPAREDNESS ACTIONS... A High Wind Warning means that winds at the summits are expected to be at least 56 mph, with gusts over 66 mph. Take necessary precautions to protect property. Travel to summit areas should be delayed until winds subside. && $$ HIZ023>027-301430- /O.NEW.PHFO.WI.Y.0021.170430T0054Z-170501T0400Z/ Kona-South Big Island-Big Island North and East-Kohala- Big Island Interior- 254 PM HST Sat Apr 29 2017 ...WIND ADVISORY IN EFFECT UNTIL 6 PM HST SUNDAY... The National Weather Service in Honolulu has issued a Wind Advisory, which is in effect until 6 PM HST Sunday. * TIMING...through Sunday. * WINDS...South 15 to 30 mph with localized gusts to 50 mph. * IMPACTS...Downed tree limbs may lead to localized power outages. Sudden winds gusts may make driving hazardous for those in high- profile vehicles. PRECAUTIONARY/PREPAREDNESS ACTIONS... A Wind Advisory means that sustained winds of at least 30 mph, or gusts of at least 50 mph, are expected. Motorists should use extra caution. && $$ Birchard
1 follow-up statement
833 WWHW70 PHFO 301356 NPWHFO URGENT - WEATHER MESSAGE National Weather Service Honolulu HI 356 AM HST Sun Apr 30 2017 ...HIGH WIND WARNING FOR THE BIG ISLAND SUMMITS THROUGH SUNDAY NIGHT... ...WIND ADVISORY FOR LOWER ELEVATIONS OF THE BIG ISLAND... .A Kona low moving close to the islands will bring strong south to southwest winds to the Big Island through Sunday night. HIZ023>027-301500- /O.CAN.PHFO.WI.Y.0021.000000T0000Z-170501T0400Z/ Kona-South Big Island-Big Island North and East-Kohala- Big Island Interior- 356 AM HST Sun Apr 30 2017 ...WIND ADVISORY IS CANCELLED... Winds have dropped below advisory levels, therefore the Wind Advisory has been cancelled. $$ HIZ028-010400- /O.CON.PHFO.HW.W.0008.000000T0000Z-170501T1600Z/ Big Island Summits- 356 AM HST Sun Apr 30 2017 ...HIGH WIND WARNING REMAINS IN EFFECT UNTIL 6 AM HST MONDAY... * TIMING...Through Sunday night. * WINDS...South to Southwest winds 55 to 65 mph with gusts to 75 mph. * IMPACTS...Dangerously strong winds will make driving hazardous. Travel to summit areas should be delayed until winds subside. PRECAUTIONARY/PREPAREDNESS ACTIONS... A High Wind Warning means that winds at the summits are expected to be at least 56 mph, with gusts over 66 mph. Take necessary precautions to protect property. Travel to summit areas should be delayed until winds subside. && $$
The office that day
Everything else NWS Honolulu, HI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 29, 2:59 PM HST | Winter Storm Warning | HFO | Hawaii | 25 hr |
| Apr 29, 3:45 PM HST | Small Craft Advisory | HFO | 12 hr | |
| Apr 29, 8:45 PM HST | Areal Flood Advisory | HFO | Kalawao | 6 hr |
| Apr 29, 10:45 PM HST | Special Marine Warning | HFO | 2 hr | |
| Apr 30, 2:56 AM HST | Areal Flood Advisory | HFO | Kalawao | 10 hr |
| Apr 30, 7:43 AM HST | Small Craft Advisory | HFO | 8 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.