Alaska, 2007

High Wind in Alaska, October 25, 2007

October 25, 2007 · NWS AFC · 2 events in 2 counties and zones

A 996MB Low was centered near the southern tip of the Kenai Peninsula. This storm generated gale force winds across the northern gulf of Alaska and warning level winds over portions of the northern gulf coast through Portage pass and along Turnagain Arm.

The toll

Deaths
0
Injuries
0
Property damage
None recorded
Crop damage
None recorded
Events
2

Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.

What happened

The episode as NWS AFC wrote it up.

A 996MB Low was centered near the southern tip of the Kenai Peninsula. This storm generated gale force winds across the northern gulf of Alaska and warning level winds over portions of the northern gulf coast through Portage pass and along Turnagain Arm.

What forecasters said that day

The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Anchorage, AK wrote its last area forecast discussion before the first event at Oct 25, 8:00 AM AKST, 8 hours 30 minutes earlier.

Area forecast discussion, Oct 25, 8:00 AM AKST, 8 hours 30 minutes before
AREA FORECAST DISCUSSION
SOUTHCENTRAL AND SOUTHWEST ALASKA
200 PM ADT THU OCT 25 2007

.MODEL DISCUSSION...NCEP/UKMET MODEL INITIALIZATIONS AND FORECAST
THROUGH 60-72 HOURS REASONABLE. CONSISTENCY PROBLEMS ARISE BEYOND 72
HOURS WITH LOW COMPLEX MOVING NEAR THE WESTERN ALEUTIANS SUN. THE GFS
MODEL TENDS TO DEVELOP THIS CENTER TAKING IT JUST SOUTH OF ADAK IN
THE 960S MON SUN MORNING. THIS IS A MAJOR SHIFT FROM THE PREVIOUS RUN
WHICH HAS A 990 MB MUCH FURTHER TO THE SE. GFS ENSEMBLE MEMBERS WOULD
NOT SUPPORT A CENTER ANYWHERE NEAR 965 MB. THE 12Z EC CARRIES A 968
MB CENTER NEAR 51N 178E SUN AFTERNOON. THINKING THAT LOW CENTER WILL
BE DEEPER THEN OLD GFS RUN BUT NOT AS DEEP AS CURRENT GFS/EC RUNS. SO
FOR NOW WILL LEAN TOWARD GFS POSITIONS BEYOND 72 HOURS...BUT RAISE
THE PRESSURE AND LOWER THE WIND MAGNITUDES.

.EAST...MAIN CONCERN WITH WIND. STRONG OCCLUDED FRONT EXTENDING
ACROSS SW ALASKA...KODIAK...TO A TRIPLE POINT IN THE SOUTHERN
OFFSHORE FORECAST ZONE...MOVES INLAND OVER SOUTHCENTRAL
ALASKA/NORTHERN GULF COAST EARLY FRI MORNING. STRONG PRESSURE
GRADIENTS AND RESULTANT WINDS ACROSS MUCH OF THE EASTERN FORECAST
AREA WILL DIMINISH SOME AFTER THE FRONT MOVES INLAND TONIGHT. WIND
WARNING CONDITIONS THROUGH ZONES 101 AND 125 SHOULD VERIFY THIS
AFTERNOON AND EVENING...BEFORE DIMINISHING OVERNIGHT. WARMING OVER
SOUTHCENTRAL TONIGHT MAY BE A LITTLE OVER DONE IN THE SUSITINA
VALLEY. TEMPS PROBABLY WILL HOLD BELOW FREEZING IN THE NORTHERN
VALLEY...SO WITH THE ONSET OF SW FLOW IN THE MID LEVELS SNOW AMOUNTS
MAY BE A CONCERN FOR TONIGHT. UNSTABLE CONDITIONS WILL PREVAIL OVER
MUCH OF THE EAST AS FRONTAL PASSAGE FRI MORNING SO LOOK FOR RAIN/SNOW
SHOWERS TO BE THE GENERAL RULE.

.WEST....THE ARCTIC FRONTAL BOUNDARY THIS AFTERNOON EXTENDS ACROSS SW
ALASKA FROM PAHP...PASM...TO ALONG THE TAYLOR MOUNTAINS THIS
AFTERNOON. EXPECT WILL SOME BOUNDARY TO MOVE A LITTLE FURTHER NORTH
TONIGHT. HOWEVER...THE COLD AIR WILL REMAIN TRAPPED IN THE KUSKOKWIM
VALLEY THROUGH TONIGHT. THAT SAID...MAY SEE POCKETS OF LIGHT FREEZING
RAIN THROUGH TONIGHT MIXED IN WITH SNOW. OVER BRISTOL SHOULD DROP
THROUGH LATE THIS AFTERNOON/EARLY EVENING AS OCCLUDED FRONT MOVES
NORTH AND EAST. LOW COMPLEX OVER THE EASTERN BERING SEA WILL CONTINUE
SHOWERS IN THE REGION THROUGH SAT. OLD LOW CENTER OVER THE WESTERN
ALEUTIANS WILL MOVE TO THE WESTERN AK PEN SAT MORNING. EXPECT
NORTHERLY GALES ON THE BACKSIDE OF THIS CENTER AS IT MOVES ACROSS THE
ALEUTIANS. CONFIDENCE LEVEL IS NOT VERY HIGH OVER THE ALEUTIANS/PEN
BEYOND SAT NIGHT AS DISCUSSED IN MODEL ANALYSIS.

.AER/ALU...WATCH/WARNING SUMMARY
PUBLIC...HIGH WIND WARNING ZONES 101 AND 111.
MARINE...STORM 120 GALES 130 132 172 175 176 185.

RMC OCT 07

Event by event

2 high wind. Local standard time, as filed.

High Wind, Anchorage Muni to Bird Creek

When
October 25, 4:30 PM AKST to 5:30 PM AKST
Where
Anchorage Muni to Bird Creek forecast zone
Measured
73 kt (84 mph) estimated gust
Reported by
Official NWS Observations

High Wind, Wrn P.W. Snd & Kenai Mtns

When
October 25, 4:30 PM AKST to 5:30 PM AKST
Where
Wrn P.W. Snd & Kenai Mtns forecast zone
Measured
73 kt (84 mph) measured gust
Reported by
ASOS

Rain and winds began across the area on the morning of October 25th. The Portage ASOS recorded periods of heavy rain and winds gusting in the upper teens to upper 20's during the morning hours...with gusts reaching into the upper 40's by afternoon. Winds and rain continued across the zone with gusts increasing through late afternoon. At 5:53 PM, a peak wind of 73KT registered on the ASOS. Winds gradually diminished thereafter.

What these are

High Wind
Sustained non-thunderstorm winds of 40 mph or more for an hour, or gusts of 58 mph or more.

After NWS Directive 10-1605, the rules offices file Storm Data by.

The same day elsewhere

More

Every storm in Alaska in 2007Every state in 2007This day in weather historyWarnings in Alaska, October 2007

Sources

NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-10-01. Each event’s entry at NCEI: 57092, 57220.