Alert archive / Hawaii / Flash Flood Warnings in 2024

Flash Flood Warning 11, NWS Honolulu, HI

May 10, 2024Hawaii County, Hawaii

NWS Honolulu, HI issued this flash flood warning at May 10, 2024, 11:49 PM HST for Hawaii County, Hawaii. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued: May 10, 2024, 11:49 PM HST (09:49 UTC)
Expired: May 11, 2024, 6:00 AM HST
In force: 6 hr
Issued by: NWS Honolulu, HI
Area: Storm-based polygon
Flood severity: None

County Hawaii County, HI

The radar

The South Shore radar (PHWA), 57 km from the middle of the area, began a volume at 09:49 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, 9.8 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.

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: 970 J/kg
Mixed-layer CIN: -1 J/kg
Mixed-layer LCL: 698 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 57 m²/s²
0-3 km storm-relative helicity: 115 m²/s²
Significant tornado parameter: 0.4
Supercell composite: 3.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood warning 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 warning went out at May 10, 9:00 PM HST, 2 hours 49 minutes earlier.

Area forecast discussion, May 10, 9:00 PM HST, 2 hours 49 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
May 10, 3:01 PM HST	Special Marine Warning	HFO		68 min
May 10, 3:02 PM HST	Special Marine Warning	HFO		118 min
May 10, 3:14 PM HST	Areal Flood Advisory	HFO	Hawaii	32 min
May 10, 3:21 PM HST	Areal Flood Advisory	HFO	Honolulu	109 min
May 10, 3:33 PM HST	Special Weather Statement	HFO	Hawaii	42 min
May 10, 3:46 PM HST	Flash Flood Warning	HFO	Hawaii	2 hr
May 10, 4:37 PM HST	Special Marine Warning	HFO		113 min
May 10, 6:13 PM HST	Special Marine Warning	HFO		94 min
May 10, 6:17 PM HST	Special Marine Warning	HFO		78 min
May 10, 6:40 PM HST	Areal Flood Advisory	HFO	Kalawao	59 min
May 10, 7:11 PM HST	Areal Flood Advisory	HFO	Hawaii	83 min
May 10, 7:59 PM HST	Special Marine Warning	HFO		2 hr
May 10, 9:24 PM HST	Areal Flood Advisory	HFO	Hawaii	93 min
May 10, 9:45 PM HST	Special Marine Warning	HFO		2 hr
May 10, 10:57 PM HST	Flash Flood Warning	HFO	Hawaii	78 min
May 10, 11:23 PM HST	Areal Flood Advisory	HFO	Hawaii	3 hr
May 11, 12:08 AM HST	Special Marine Warning	HFO		108 min
May 11, 1:08 AM HST	Areal Flood Advisory	HFO	Honolulu	114 min
May 11, 2:24 AM HST	Special Marine Warning	HFO		60 min
May 11, 2:57 AM HST	Wind Advisory	HFO	Hawaii	24 hr
May 11, 2:57 AM HST	Winter Weather Advisory	HFO	Hawaii	12 hr
May 11, 4:18 AM HST	Flash Flood Warning	HFO	Hawaii	3 hr
May 11, 5:27 AM HST	Special Marine Warning	HFO		37 min
May 11, 6:33 AM HST	Areal Flood Advisory	HFO	Kauai	2 hr
May 11, 8:11 AM HST	Special Marine Warning	HFO		79 min

Nearby

Flash Flood Warnings in Hawaii, 2024 Every flash flood warning in 2024

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.