663 
WWHW40 PHFO 191956
WSWHFO

URGENT - WINTER WEATHER MESSAGE
National Weather Service Honolulu HI
956 AM HST Mon Feb 19 2018

...WINTER WEATHER ADVISORY FOR BIG ISLAND SUMMITS ABOVE 9000 FEET
THROUGH THIS AFTERNOON...

.Abundant moisture moving over the area will combine with a
potent disturbance aloft to bring periods of wintry weather to
the Big Island summits today.

HIZ022-192100-
/O.CAN.PHFO.WW.Y.0006.000000T0000Z-180220T0400Z/
Haleakala Summit-
956 AM HST Mon Feb 19 2018

...WINTER WEATHER ADVISORY IS CANCELLED...

The threat for significant snow over the summit of Haleakala has 
diminished as drier air and warmer temperatures have moved in over
the area.

$$

HIZ028-200400-
/O.CON.PHFO.WW.Y.0006.000000T0000Z-180220T0400Z/
Big Island Summits-
956 AM HST Mon Feb 19 2018

...WINTER WEATHER ADVISORY REMAINS IN EFFECT UNTIL 6 PM HST THIS
EVENING...

* WHAT...Periods of snow showers. Plan on slippery road
  conditions. Additional snow accumulations of 1 to 2 inches are
  possible.

* WHERE...Big Island Summits.

* WHEN...Until 6 PM today.

* ADDITIONAL DETAILS...Be prepared for reduced visibilities at 
  times. Heavy bursts of snow could also be accompanied by
  lightning.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

A Winter Weather Advisory for snow means periods of snow will
cause travel difficulties. Be prepared for snow covered roads and
limited visibilities, and use extreme caution while driving.

$$
Burke