Alert archive / Alaska / Small Craft Advisories in 2009

Small Craft Advisory 1013, NWS Anchorage, AK

December 13, 2009

NWS Anchorage, AK issued this small craft advisory at Dec 13, 2009, 4:00 PM AKST. It was in force for 5 days.

The area

The counties it named.

The facts

Issued: Dec 13, 2009, 4:00 PM AKST (01:00 UTC)
Expired: Dec 18, 2009, 4:00 AM AKST
In force: 5 days
Issued by: NWS Anchorage, AK

What forecasters said that day

The local office's own words before this small craft advisory went out, 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 this small craft advisory went out at Dec 13, 2:30 PM AKST, 1 hour 30 minutes earlier.

Area forecast discussion, Dec 13, 2:30 PM AKST, 1 hour 30 minutes before

AREA FORECAST DISCUSSION
SOUTHCENTRAL AND SOUTHWEST ALASKA
230 PM AKST SUN DEC 13 2009

.MODEL DISCUSSION...UPPER AIR AND SURFACE SYNOPTIC SCALE
INITIALIZATIONS REASONABLE. FORECAST TRENDS VERY SIMILAR AND
REASONABLE THROUGH THE SHORT TERM. SOME MESO-SCALE ADJUSTMENTS WILL
BE NEEDED AS ALWAYS TO ACCOUNT FOR LOCAL EFFECTS AND SOME MINOR
DEVIATIONS IS MODEL SOLUTIONS NEAR THE END OF THE SHORT TERM.

UPPER LEVELS...300/500 MB HEIGHTS DROPPED SOME OVER THE MAINLAND
INDICATING THAT THE UPPER RIDGE IS RETREATING NW INTO RUSSIA. THIS
WILL EVENTUALLY ALLOW THE UPPER LOW OVER THE ARCTIC TO DROP SOUTH.
MODEL PROJECTIONS MOVE THE ARCTIC LOW SOUTH TO OVER SW INTERIOR WED.
THE ASSOCIATED TROUGH SHARPENS ACROSS THE MAINLAND WEST AND NORTH OF
THE ALASKA RANGE MONDAY AND SETS UP W TO SW FLOW ACROSS THE EASTERN
MAINLAND. THE FLOW CONTINUES TO BACK AND STRENGTHEN ACROSS THE
EASTERN HALF OF THE MAINLAND AS THE LOW CENTER DIGS INTO THE SW
INTERIOR.

THE HIGH CENTER WHICH MOVES OVER EASTERN RUSSIA REBUILDS OVER THE
BERING SEA MON AND TUE. THE RIDGE THEN STARTS TO SPLIT N/S AS A LOW
CENTER MOVES TO NEAR KAMCHATKA WED.

SURFACE...
.SOUTHCENTRAL...DENSE FOG ACROSS THE ANCHORAGE BOWL WILL SLOWLY
DISSIPATE LATER TODAY AS COLDER AIR MOVING IN ALOFT WEAKENS SURFACE
INVERSION. SIGNIFICANT SNOWFALL POTENTIAL EXISTS MON NIGHT THROUGH
TUESDAY OVER SOUTHCENTRAL ALASKA AS UPPER TROUGH SETS UP SOUTHERLY
FLOW ALOFT...WEAK LOW MOVES THE EASTERN KENAI PEN...AND COLD
ADVECTION SPREADS INTO COOK INLET. THIS WILL BE A LONG DURATION EVENT
(POSSIBLY CONTINUING INTO WED) AS THE LONG WAVE STAYS WEST OF
SOUTHCENTRAL AND CONTINUES SOUTHERLY FLOW ALOFT AND WEAK SURFACE LOW
SETS UP RESIDENT IN THE WESTERN SOUND. WILL BE GENERALLY INCREASING
QPF AND POPS ACROSS THE REGION ON THIS FORECAST PACKAGE IN PREP FOR
PROBABLE UPCOMING WWA STATEMENTS.

.SW ALASKA...
COLD ADVECTION IS STILL ON TRACK INTO SW ALASKA OVER THE NEXT COUPLE
OF DAYS AS HEIGHTS FALL WITH DIGGING UPPER TROUGH. MOST OF THE
MOISTURE SHOULD BE EAST OF THE AREA...WOULD ONLY EXPECT A FEW SNOW
SHOWERS AT WORST IN THE AREA. FOG SHOULD BECOME LESS OF A CONCERN
OVER THE NEXT COUPLE OF DAYS WITH INSTABILITY WITH UPPER TROUGH AND
INCREASING NORTHERLY FLOW.

BERING SEA/ALEUTIANS...NELY FLOW INCREASES OVER THE BERING SEA WITH
PINCH BETWEEN HIGH OVER RUSSIA AND TROUGH OVER SOUTHCENTRAL. WINDS
OVER THE EASTERN BERING SEA LIKELY TO BECOME RATHER BRISK TUE/WED
WHILE WINDS OVER THE CENTRAL BERING SEA/ALEUTIANS SHOULD BE
RELATIVELY LIGHT AS THE HIGH AXIS MOVES INTO THE AREA. WINDS INCREASE
ACROSS THE WESTERN ALEUTIANS WITH APPROACH OF A FRONTAL WED NIGHT.
AREAS OF LOW STRATUS AND FOG LIKELY OVER PORTIONS OF THE BERING SEA
AND ALEUTIANS THROUGHOUT THE PERIOD...EASTERN BERING SEA MAY HAVE
MORE SNOW SHOWER ACTIVITY.

.AER/ALU...WATCH/WARNING SUMMARY
PUBLIC...NONE.
MARINE...NONE.
FIRE WEATHER...NONE.

RMC DEC 09

In the hours before

Special weather statement, Dec 13, 4:00 PM AKST, 0 minutes before

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Service Notice</title>
  <link rel="stylesheet" href="index.css">
</head>
<body>
  <main class="wrap">
    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
      <p id="message1">
        The site you requested is temporarily down for maintenance or an unexpected outage.
      </p>
      <p id="message2">
        Please try again in a few minutes.
      </p>
      <p class="small" id="detail">
        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
      </p>
    </section>
  </main>
  <script src="index.js"></script>
</body>
</html>

The office that day

Everything else NWS Anchorage, AK issued on the same UTC day.

Issued	Product	Office	Lasted
Dec 13, 4:00 PM AKST	Heavy Freezing Spray Warning	AFC	5 days
Dec 14, 4:00 AM AKST	Small Craft Advisory	AFC	36 hr
Dec 14, 4:00 AM AKST	Heavy Freezing Spray Warning	AFC	12 hr

Nearby

Small Craft Advisories in Alaska, 2009 Every small craft advisory in 2009

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text.