Alert archive / Hawaii / Areal Flood Advisories in 2018
Areal Flood Advisory 252, NWS Honolulu, HI
NWS Honolulu, HI issued this areal flood advisory at Oct 19, 2018, 8:47 PM HST for Kalawao County, Hawaii. It was in force for 4 hr.
The area
The counties it named.
The facts
- Issued
- Oct 19, 2018, 8:47 PM HST (06:47 UTC)
- Expired
- Oct 20, 2018, 12:25 AM HST
- In force
- 4 hr
- Issued by
- NWS Honolulu, HI
- Area
- Storm-based polygon
County Kalawao County, HI
The radar
The Molokai radar (PHMO), 24 km from the middle of the area, began a volume at 06:48 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
Lihue, (PHLI), launched 00:00Z, 6.8 hours before the alert went out and 263 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
- 403 J/kg
- Mixed-layer CIN
- -74 J/kg
- Mixed-layer LCL
- 1161 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- -1 m²/s²
- 0-3 km storm-relative helicity
- 54 m²/s²
- Significant tornado parameter
- -0.0
- Supercell composite
- -0.6
What forecasters said that day
The local office's own words before this areal flood advisory 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 areal flood advisory went out at Oct 19, 8:43 PM HST, 4 minutes earlier.
Area forecast discussion, Oct 19, 8:43 PM HST, 4 minutes before
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</html>The office that day
Everything else NWS Honolulu, HI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 19, 2:30 PM HST | Areal Flood Advisory | HFO | Honolulu | 3 hr |
| Oct 19, 3:24 PM HST | Areal Flood Advisory | HFO | Kalawao | 3 hr |
| Oct 19, 4:44 PM HST | Areal Flood Advisory | HFO | Kalawao | 3 hr |
| Oct 19, 4:52 PM HST | Areal Flood Advisory | HFO | Honolulu | 6 hr |
| Oct 19, 6:05 PM HST | Areal Flood Advisory | HFO | Kalawao | 3 hr |
| Oct 19, 8:40 PM HST | Flash Flood Warning | HFO | Honolulu | 2 hr |
| Oct 20, 2:01 AM HST | Areal Flood Advisory | HFO | Kalawao | 5 hr |
| Oct 20, 10:21 AM HST | Areal Flood Advisory | HFO | Kalawao | 3 hr |
| Oct 20, 12:44 PM HST | Special Marine Warning | HFO | 61 min | |
| Oct 20, 1:40 PM HST | Special Marine Warning | HFO | 40 min |
Nearby
Areal Flood Advisories in Hawaii, 2018Every areal flood advisory 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.