Alert archive / Hawaii / Special Weather Statements in 2018

Special Weather Statement, NWS Honolulu, HI

February 5, 2018Hawaii County, Hawaii

NWS Honolulu, HI issued this special weather statement at Feb 5, 2018, 9:08 PM HST for Hawaii County, Hawaii. It was in force for 82 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Feb 5, 2018, 9:08 PM HST (07:08 UTC)
Expired
Feb 5, 2018, 10:30 PM HST
In force
82 min
Issued by
NWS Honolulu, HI

County Hawaii County, HI

The radar

The Kamuela/Kohala Apt radar (PHKM), 38 km from the middle of the area, began a volume at 07:11 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, 7.1 hours before the alert went out and 94 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.

Skew-T log-pSkew-T log-p diagram, Hilo, at 00:00Z on 2018-02-06Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 479 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Hilo, at 00:00Z on 2018-02-06The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 38 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
479 J/kg
Mixed-layer CIN
-100 J/kg
Mixed-layer LCL
1227 m above ground
0-6 km bulk shear
42 kt
0-1 km storm-relative helicity
38 m²/s²
0-3 km storm-relative helicity
60 m²/s²
Significant tornado parameter
0.0
Supercell composite
1.1

Open this sounding in Storm Lab

The text

As transmitted.

050 
WWHW80 PHFO 060708
SPSHFO

Special Weather Statement
National Weather Service Honolulu HI
908 PM HST MON FEB 5 2018

HIZ023-025>027-060830-
Big Island North and East-Kohala-Kona-Big Island Interior-
908 PM HST MON FEB 5 2018

...STRONG THUNDERSTORMS AND GUSTY WINDS APPROACHING THE BIG ISLAND 
FROM THE WEST...

At 905 PM HST, radar indicated a line of strong thunderstorms over 
waters to the northwest and west of the Big Island, moving east at 
15 to 20 mph. These storms extended from the Alenuihaha Channel to 
about 20 miles west of Honaunau. As these storms move over the Big 
Island, wind gusts of 50 to 55 mph are possible, as well as frequent 
dangerous lightning, and torrential downpours reducing visibility to 
near zero.

Locations impacted include...
Kailua-Kona, Captain Cook, Waikoloa Village, Kapaau, Hawi, Honaunau,
Kahaluu-Keauhou, Kealakekua, Puuanahulu, Kainaliu, Honalo, Pololu
Valley, Kohala Ranch, Kalaoa, Halaula, Holualoa, Puako, Kamuela,
Pohakuloa Training Area and Mahukona.

Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.

LAT...LON 1936 15589 1959 15597 1965 15603 1975 15606
      1978 15605 1986 15593 1998 15583 2003 15582
      2016 15591 2023 15591 2027 15587 2025 15577
      2018 15569 1920 15571 1917 15591
TIME...MOT...LOC 0707Z 276DEG 19KT 1916 15635 2030 15635 

$$

Birchard

The office that day

Everything else NWS Honolulu, HI issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Feb 5, 2:28 PM HSTSpecial Marine WarningHFO2 hr
Feb 5, 3:11 PM HSTAreal Flood AdvisoryHFOHawaii3 hr
Feb 5, 3:12 PM HSTWinter Storm WatchHFOHawaii4 hr
Feb 5, 3:21 PM HSTAreal Flood AdvisoryHFOKalawao5 hr
Feb 5, 3:43 PM HSTSpecial Weather StatementHFOHawaii47 min
Feb 5, 3:49 PM HSTAreal Flood AdvisoryHFOHawaii3 hr
Feb 5, 4:44 PM HSTWind AdvisoryHFOHawaii34 hr
Feb 5, 4:59 PM HSTSpecial Weather StatementHFO31 min
Feb 5, 5:21 PM HSTAreal Flood AdvisoryHFOKalawao3 hr
Feb 5, 6:03 PM HSTAreal Flood AdvisoryHFOKalawao6 hr
Feb 5, 6:16 PM HSTSpecial Marine WarningHFO119 min
Feb 5, 7:13 PM HSTWinter Weather AdvisoryHFOHawaii6 hr
Feb 5, 8:15 PM HSTSpecial Marine WarningHFO2 hr
Feb 5, 8:24 PM HSTSpecial Marine WarningHFO2 hr
Feb 5, 9:12 PM HSTAreal Flood AdvisoryHFOKauai6 hr
Feb 5, 9:27 PM HSTSpecial Marine WarningHFO2 hr
Feb 5, 9:52 PM HSTSevere Thunderstorm WarningHFOHawaii38 min
Feb 5, 10:11 PM HSTAreal Flood AdvisoryHFOHawaii3 hr
Feb 5, 10:27 PM HSTSevere Thunderstorm WarningHFOHawaii18 min
Feb 5, 10:39 PM HSTAreal Flood AdvisoryHFOHonolulu3 hr
Feb 5, 10:47 PM HSTSpecial Marine WarningHFO118 min
Feb 5, 10:52 PM HSTSevere Thunderstorm WarningHFOHawaii30 min
Feb 5, 11:27 PM HSTSpecial Marine WarningHFO2 hr
Feb 6, 12:33 AM HSTSpecial Marine WarningHFO117 min
Feb 6, 12:55 AM HSTWinter Storm WarningHFOHawaii26 hr
Feb 6, 1:24 AM HSTSpecial Marine WarningHFO2 hr
Feb 6, 1:28 AM HSTAreal Flood AdvisoryHFOHonolulu3 hr
Feb 6, 2:54 AM HSTFlash Flood WarningHFOKauai3 hr
Feb 6, 3:24 AM HSTSpecial Marine WarningHFO2 hr
Feb 6, 4:26 AM HSTSpecial Marine WarningHFO2 hr
Feb 6, 6:22 AM HSTSpecial Marine WarningHFO53 min
Feb 6, 9:43 AM HSTSpecial Marine WarningHFO62 min
Feb 6, 11:26 AM HSTSpecial Marine WarningHFO64 min
Feb 6, 1:17 PM HSTSpecial Weather StatementHFOHawaii28 min
Feb 6, 1:55 PM HSTSpecial Marine WarningHFO65 min

Nearby

Special Weather Statements in Hawaii, 2018Every special weather statement in 2018

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.