Wunderground shows over 30 inches of rain between 3/6-3/14 and in my experience their forecast is substantially on the low side of what we receive at our farm, so estimating 4 feet of rain does seem about right.
Here's more: https://forecast.weather.gov/product.php?site=HFO&issuedby=HFO&product=AFD&format=CI&version=1&glossary=1
Area Forecast Discussion
National Weather Service Honolulu HI
333 AM HST Fri Mar 5 2021
.SYNOPSIS...
A high to the north will maintain breezy trade winds over the area
through the weekend. The trade winds are pushing remnants of a
front over the islands, focusing showers over mainly windward
areas. Rainfall may become heavier and more widespread as deeper
moisture spreads over the area from the southeast starting Sunday.
Next week, a new high may produce windy weather.
&&
.DISCUSSION...
A 1033 mb surface high northwest of the main Hawaiian islands is producing
breezy northeast to east trade winds over the islands. Radars are showing
numerous showers moving over the islands from the northeast. These showers
are part of an old frontal band caught up in the trade winds. Breezy
trade winds will continue through the weekend. Windward areas will remain
rather wet with some showers spreading leeward on the smaller islands,
mainly during the nights and early mornings.
The global models are showing deeper moisture spreading over the islands
from the southeast starting on Sunday. It is too soon to know the details
of this developing pattern, but it looks as if rainfall will become
heavier and more widespread starting on the Big Island, then spreading
northwest over the other islands. Heavy rain and thunderstorms will
be possible on the Big Island with ice and snow over the upper elevations.
Moisture over the islands will subside by the middle of next week. High
pressure building far north of the area and a trough developing near
the islands may produce very windy weather through mid-week.
&&
Here's more: https://forecast.weather.gov/product.php?site=HFO&issuedby=HFO&product=AFD&format=CI&version=1&glossary=1
Area Forecast Discussion
National Weather Service Honolulu HI
333 AM HST Fri Mar 5 2021
.SYNOPSIS...
A high to the north will maintain breezy trade winds over the area
through the weekend. The trade winds are pushing remnants of a
front over the islands, focusing showers over mainly windward
areas. Rainfall may become heavier and more widespread as deeper
moisture spreads over the area from the southeast starting Sunday.
Next week, a new high may produce windy weather.
&&
.DISCUSSION...
A 1033 mb surface high northwest of the main Hawaiian islands is producing
breezy northeast to east trade winds over the islands. Radars are showing
numerous showers moving over the islands from the northeast. These showers
are part of an old frontal band caught up in the trade winds. Breezy
trade winds will continue through the weekend. Windward areas will remain
rather wet with some showers spreading leeward on the smaller islands,
mainly during the nights and early mornings.
The global models are showing deeper moisture spreading over the islands
from the southeast starting on Sunday. It is too soon to know the details
of this developing pattern, but it looks as if rainfall will become
heavier and more widespread starting on the Big Island, then spreading
northwest over the other islands. Heavy rain and thunderstorms will
be possible on the Big Island with ice and snow over the upper elevations.
Moisture over the islands will subside by the middle of next week. High
pressure building far north of the area and a trough developing near
the islands may produce very windy weather through mid-week.
&&