Hawaiian Fire Weather Products

The Fire Weather program is used by land management personnel primarily for input in decision-making related to pre-suppression and other planning, that may impact firefighter safety, protection of the public and property, and resource allocation. The primary source of information is the routinely issued Fire Weather Planning Forecast. In Hawaii, this product is issued once a day around 5:30 am HST.

The Spot Forecasts are issued by WFO HFO at the request of and in support of wildfire suppression and natural resource management. These forecasts aid the land management and fire control agencies in protecting life and property during wildland fires, hazardous fuels reduction, and the rehabilitation and restoration of natural resources. Spot Forecasts can be issued for the first 36 hours.

Fire Weather section from the Area Forecast Discussion
issued at: Oct 16, 2017 8:51 PM HST

Strong trade winds coupled with a drier airmass pushing over the State will allow minimum relative humidity to drop into the 40 to 45 percent range during the afternoon hours over the next few days. These conditions will result in an increased potential for fires to ignite and spread quickly. The windy and relatively dry conditions will continue through the end of the work week before the trade winds weaken. The Keetch-Byram Drought Index, or KBDI, is at 572 today (and would need to be at 600 for Red Flag Warning criteria). Keep in mind that we will be close to these conditions each afternoon.

Need an outlook on weather conditions beyond the 36 hours included in the Spot Forecast? Use the NWS' Point and Click forecast to get information for up to 7 days ahead.

Enter latitude/longitude pair in decimal degrees (i.e. 21.28 -157.83)
Forecast Type

Wind Observation Plots
(Wind barb information)
(updated twice an hour)

    Kauai    Oahu    Maui County    Big Island    State of Hawaii

KBDI Information

Today's preliminary observed PHNL KBDI is: Not yet available
The average 10/17 PHNL KBDI is: 621

The Keetch-Byram Drought Index (KBDI), which is used to track fuel conditions and assess wildfire potential, describes soil moisture deficit with values ranging from 0 to 800. A value of 800 indicates extreme drought, and a value of 0 reflects saturated soil. KBDI at the Honolulu International Airport (PHNL) fluctuates through the year, while values in excess of 600 represent the highest 34% of values from 1975-2010. A KBDI of greater than 600 is typically encoutnered by late July and normally persists through late October.