Alert archive / Hawaii / Special Weather Statements in 2017

Special Weather Statement, NWS Honolulu, HI

October 12, 2017Hawaii County, Hawaii

NWS Honolulu, HI issued this special weather statement at Oct 12, 2017, 9:37 PM HST for Hawaii County, Hawaii. It was in force for 83 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: Oct 12, 2017, 9:37 PM HST (07:37 UTC)
Expired: Oct 12, 2017, 11:00 PM HST
In force: 83 min
Issued by: NWS Honolulu, HI

County Hawaii County, HI

The radar

The South Shore radar (PHWA), 12 km from the middle of the area, began a volume at 07:37 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, 7.6 hours before the alert went out and 80 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 42 J/kg
Mixed-layer CIN: -350 J/kg
Mixed-layer LCL: 1492 m above ground
0-6 km bulk shear: 17 kt
0-1 km storm-relative helicity: -9 m²/s²
0-3 km storm-relative helicity: -77 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Honolulu, HI wrote its last area forecast discussion before this special weather statement went out at Oct 12, 8:30 PM HST, 1 hour 7 minutes earlier.

Area forecast discussion, Oct 12, 8:30 PM HST, 1 hour 7 minutes before

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In the hours before

Local storm report, Oct 12, 7:25 PM HST, 2 hours 12 minutes before

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Special weather statement, Oct 12, 7:34 PM HST, 2 hours 3 minutes before

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Special weather statement, Oct 12, 7:40 PM HST, 1 hour 57 minutes before

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Special weather statement, Oct 12, 9:37 PM HST, 0 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 12, 3:08 PM HST	Areal Flood Advisory	HFO	Kalawao	3 hr
Oct 12, 3:29 PM HST	Special Marine Warning	HFO		2 hr
Oct 12, 3:50 PM HST	Flash Flood Warning	HFO	Kalawao	3 hr
Oct 12, 7:34 PM HST	Special Weather Statement	HFO	Hawaii	116 min
Oct 12, 7:40 PM HST	Special Weather Statement	HFO	Hawaii	110 min
Oct 12, 8:11 PM HST	Areal Flood Advisory	HFO	Hawaii	3 hr
Oct 13, 2:28 AM HST	Areal Flood Advisory	HFO	Honolulu	3 hr
Oct 13, 3:36 AM HST	Small Craft Advisory	HFO		9 days
Oct 13, 6:44 AM HST	Areal Flood Advisory	HFO	Hawaii	3 hr

Nearby

Special Weather Statements in Hawaii, 2017 Every special weather statement in 2017

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.