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AGAK78 PACR 031447 
ACRHMDACR

HYDROMETEOROLOGICAL DISCUSSION 
NWS ALASKA PACIFIC RIVER FORECAST CENTER ANCHORAGE AK  
300 PM AKDT FRI JUL 03 2009

...FLOOD POTENTIAL... 
FLOOD POTENTIAL IS LOW OVER ALASKA... BUT LOCALLY HEAVY RAIN FROM
CONVECTIVE SHOWERS MAY CAUSE RAPID RISES ON SMALL STREAMS. 

...HYDROMETEOROLOGICAL CONDITIONS...
ON THURSDAY LIGHT RAIN WAS REPORTED FROM PORTIONS OF THE ALASKA
MAINLAND AND NORTHERN PANHANDLE INCLUDING REGIONS SUCH AS THE LOWER
KUSKOKWIM VALLEY... WESTERN COPPER BASIN... SOUTHERN KENAI
PENINSULA... AND KODIAK ISLAND. RAINFALL TOTALS REPORTED FROM THESE
REGIONS OVER THE 24 HOUR PERIOD ENDING AT 4 AM FRIDAY WERE GENERALLY
UNDER A TENTH OF AN INCH... WITH THE EXCEPTION OF A REPORT OF 0.22
INCHES FROM GULKANA IN THE WESTERN COPPER RIVER BASIN. CONVECTIVE
ACTIVITY DEVELOPED YESTERDAY AFTERNOON OVER THE LOWER KUSKOKWIM
VALLEY AND SOUTH CENTRAL MAINLAND... WHICH PRODUCED 1008 LIGHTNING
STRIKES. FROM THE SOUTHERN AKPEN... ALEUTIANS... AND BERING SEA...
HEAVY RAIN WAS REPORTED WHERE PRECIPITATION ASSOCIATED THE BERING LOW
MOVED TOWARDS THE SOUTHWESTERN MAINLAND. RAINFALL TOTALS FROM THESE
REGIONS RANGED FROM 0.34 INCHES FROM COLD BAY TO 0.90 INCHES FROM
SAINT PAUL ISLAND IN THE BERING SEA. 

ON FRIDAY MORNING AN UPPER LEVEL RIDGE CONTINUED TO DOMINATE MAINLAND
ALASKA... WHILE A LOW WAS POSITIONED OVER THE BERING... AND A WEAK
LOW WAS POSITIONED IN THE GULF. THE GULF LOW WILL MOVE SOUTHEASTWARD
OVER THE GULF TOWARDS THE NORTHERN PACIFIC AND NORTHWESTERN US
MAINLAND.  THE BERING LOW WILL SLOWLY ROTATE NORTHWARDS TOWARDS
EASTERN RUSSIA... ROTATING THE BAND OF LIGHT TO MODERATE
PRECIPITATION OVER THE SOUTHWESTERN MAINLAND AND SEWARD PENINSULA...
KEEPING PERIODS OF LIGHT TO MODERATE PRECIPITATION OVER THE SEWARD
PENINSULA... SOUTHWESTERN MAINLAND... AND AKPEN OVER THE NEXT 24
HOURS. THE UPPER LEVEL RIDGE WILL CONTINUE ITS DOMINATING PRESENCE
OVER MAINLAND ALASKA... BUT WILL SHIFT NORTHWESTWARD THROUGH THE
WEEKEND. SCATTERED CONVECTIVE ACTIVITY IS POSSIBLE OVER THE SOUTH
CENTRAL INTERIOR INCLUDING REGIONS SUCH AS THE SUSITINA VALLEY...
EASTERN ALASKA RANGE... AND THE COPPER RIVER BASIN. 

 ...FREEZING LEVELS...  
ON FRIDAY MORNING FREEZING LEVELS WERE APPROXIMATELY 1000 TO 2500 FT
ABOVE NORMAL FOR THE STATE... WITH THE EXCEPTION OF KODIAK ISLAND
WHERE FREEZING LEVELS WERE SLIGHTLY BELOW NORMAL. FREEZING LEVELS
WILL INCREASE OVER MAINLAND ALASKA OVER THE NEXT 24 HOURS. BY SUNDAY
FREEZING LEVELS WILL START TO DECREASE OVER THE NORTHERN MAINLAND AND
ARCTIC COAST. 

...................................................................
THE DISCUSSION WILL BE ISSUED EVERY DAY THROUGH THE SUMMER. A
GRAPHICAL VERSION OF THE HYDROMET DISCUSSION WITH CURRENT
PRECIPITATION AND WEATHER INFORMATION WILL BE UPDATED DAILY ON THE
APRFC WEB SITE. HTTP://APRFC.ARH.NOAA.GOV/PRODUCTS/GHMD.PHP 

$$
LMT

National Weather Service
Alaska-Pacific River Forecast Center
6930 Sand Lake Road
Anchorage, Ak 99502
907-266-5160

Page Modified: 29 Dec 2005 18:00 UTC
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