Alert archive / Hawaii / Flash Flood Watches in 2014

Flash Flood Watch 1, NWS Honolulu, HI

January 28, 2014Hawaii County, Kalawao County, Hawaii

NWS Honolulu, HI issued this flash flood watch at Jan 28, 2014, 3:24 AM HST for Hawaii County, Kalawao County, Hawaii. It was in force for 49 hr.

The area

The counties it named.

The facts

Issued: Jan 28, 2014, 3:24 AM HST (13:24 UTC)
Expired: Jan 30, 2014, 4:37 AM HST
In force: 49 hr
Issued by: NWS Honolulu, HI
Flood severity: None

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 13:23 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, 1.4 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.

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: 323 J/kg
Mixed-layer CIN: -9 J/kg
Mixed-layer LCL: 534 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: -48 m²/s²
0-3 km storm-relative helicity: -19 m²/s²
Significant tornado parameter: -0.0
Supercell composite: -0.2

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood watch 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 flash flood watch went out at Jan 27, 8:40 PM HST, 6 hours 44 minutes earlier.

Area forecast discussion, Jan 27, 8:40 PM HST, 6 hours 44 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
Jan 27, 3:32 PM HST	High Surf Advisory	HFO	Honolulu, Kauai, Kalawao	16 hr
Jan 27, 9:04 PM HST	Areal Flood Advisory	HFO	Hawaii	7 hr
Jan 28, 3:17 AM HST	Winter Weather Advisory	HFO	Hawaii	11 hr
Jan 28, 3:34 AM HST	Wind Advisory	HFO	Hawaii, Kalawao	24 hr
Jan 28, 1:54 PM HST	Winter Storm Warning	HFO	Hawaii	20 hr

Nearby

Flash Flood Watches in Hawaii, 2014 Every flash flood watch in 2014

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.