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Series of Storms to Impact the West Coast

Powerful Pacific storms will keep conditions wet and windy for much of the West, especially, from northern California to western Washington. Heavy rains may produce flooding early to mid week. Heavy snow will make travel difficult from the Cascades to the northern Rockies. Snow showers continue near the Great Lakes, otherwise, dry conditions and gusty winds can be expected for much of the East. Read More >

Observed Model Pressure Differences

Observation Pressure Gradient Table
National Weather Service, Anchorage AK Forecast Office
Mon Dec 17 08:10:01 GMT 2018

Time  PAWR- PACV- PATK- PANC- PATK- PAGK- PANC- PAGK- PAHO- PADQ- PAGK- PAGK- PANN-
      PANC  PANC  PANC  PAHO  PAEN  PANC  PAMC  PATK  PAKN  PAKN  PACV  PAVD  PATK 
1609  -2.6  -4.6   0.7   1.1  -0.1   6.1 -14.0   5.4  -6.5  -9.2  10.7   6.2  11.1 
1610  -2.3  -4.9   0.6   1.0   0.1   6.6 -14.2   6.0  -7.0  -9.4  11.5   6.6  11.5 
1611  -2.8  -4.5   0.2   0.9  -0.4   6.4 -14.1   6.2  -7.4  -9.5  10.9   6.0  12.1 
1612  -2.6  -4.5   0.5   0.6  -0.3   7.6 -14.6   7.1  -8.1  -9.8  12.1   6.6  12.1 
1613  -2.2  -4.2   0.5   0.3  -0.1   7.9 -14.6   7.4  -8.3  -9.7  12.1     m  13.0 
1614  -2.7  -4.2   0.2   0.4  -0.3   7.7 -14.5   7.5  -8.4  -9.4  11.9   5.7  13.6 
1615  -2.4  -3.5   0.5   0.2  -0.1   8.2 -14.8   7.7  -8.6  -9.6  11.7   5.8  13.6 
1616  -2.2  -2.9   0.2   0.1  -0.5   8.4 -14.8   8.2  -8.7  -9.4  11.3   6.2  13.8 
1617  -1.6  -1.7   0.6  -0.4  -0.2   8.9 -14.9   8.3  -8.7  -9.6  10.6   6.1  13.6 
1618  -1.3  -1.5   0.1   0.1     m   9.3 -14.1   9.2  -8.8  -9.8  10.8   6.2  13.7 
1619  -1.5  -1.2   0.1   0.2     m   9.4 -13.5   9.3  -9.2 -10.0  10.6   6.0  13.5 
1620  -1.3  -0.8   0.2   0.2     m   9.3     m   9.1  -9.1  -9.8  10.1   5.8  13.1 
1621     m     m     m     m   0.3     m     m   8.4  -8.8  -9.6   9.8   5.4  12.0 
1622     m     m     m     m   0.3     m     m   8.2  -8.9  -9.2   9.8   5.3  11.8 
1623  -0.9  -0.7   1.0  -0.3   0.2   9.4 -13.2   8.4  -8.7  -9.2  10.1   5.6  11.6 
1700     m     m     m     m  -0.3     m     m   8.8     m     m  10.4   5.9  11.6 
1701  -0.9  -0.6   0.3  -0.8  -0.8   9.3     m   9.0  -8.5  -9.0   9.9   5.7  11.5 
1702  -1.2  -0.5   0.0     m  -1.2   9.1 -12.1   9.1     m  -8.8   9.6   5.4  11.5 
1703  -1.3  -0.6  -0.1     m     m   9.0 -11.8   9.1     m  -8.9   9.6   4.9  11.1 
1704     m     m     m     m  -1.3     m     m   9.1     m     m  10.0   5.0  10.7 
1705  -1.3  -0.5  -0.2  -1.3  -1.2   8.6 -11.4   8.8  -8.7  -8.5   9.1     m  10.1 
1706  -1.4  -0.4  -0.4  -1.3  -1.3   8.2 -10.9   8.6  -8.6  -8.3   8.6     m   9.7 
1707  -1.6     m  -0.9  -1.2  -1.6   7.8 -10.3   8.7  -8.5  -8.1     m     m   9.2 
1708  -1.5  -0.5  -0.9  -1.3     m   7.5  -9.7   8.4     m     m   8.0   4.8   8.7 

 


Forecast Model Pressure Differences

 North American Mesoscale Model

Model Forecast Pressure Gradient Table
National Weather Service, Anchorage AK Forecast Office
Mon Dec 17 03:30:01 GMT 2018

     ETA242 Pressure Difference Forecast ( 20181217_0000  UTC)
DDHH  PAWR- PACV- PATK- PANC- PATK- PAGK- PANC- PAGK- PAHO- PADQ- PAGK- PAGK- PANN-
      PANC  PANC  PANC  PAHO  PAEN  PANC  PAMC  PATK  PAKN  PAKN  PACV  PAVD  PATK 
1700  -2.5  -1.8   0.8   0.7  -0.0   8.0 -12.6   7.3 -10.4  -9.4   9.8   7.2  12.4
1703  -2.1  -1.0   0.6  -0.7  -0.3   8.0 -13.5   7.4 -10.3  -8.6   9.0   6.0  12.6
1706  -1.7  -0.4  -0.3  -1.1  -1.1   7.6 -12.3   7.9 -10.0  -7.8   8.0   6.0  11.7
1709  -2.0   0.1  -0.4  -1.0  -0.9   6.2 -10.4   6.6  -9.6  -7.4   6.1   6.7   8.9
1712  -2.6  -0.5  -0.8  -1.6  -0.9   3.5  -8.4   4.3  -8.5  -7.1   3.9   4.9   5.9
1715  -1.9  -0.7  -0.3  -1.4  -0.1   1.8  -7.2   2.1  -8.2  -6.9   2.5   3.2   4.3
1718  -1.1  -0.0   0.0  -1.3  -0.2   0.5  -6.9   0.5  -7.7  -6.4   0.5   1.7   4.8
1721  -1.4   0.9   0.1  -1.4  -0.3  -0.2  -6.9  -0.2  -7.5  -6.7  -1.0   0.4   5.4
1800  -0.7   0.5  -0.0  -0.9  -0.2  -1.1  -7.0  -1.1  -7.4  -6.8  -1.6  -1.1   5.7
1803  -0.6  -0.9   0.0  -0.6  -0.1  -0.1  -7.6  -0.1  -7.6  -7.0   0.8   0.4   6.0
1806  -0.9  -2.6   0.3  -0.1   0.2   0.4  -8.3   0.1  -8.3  -7.1   3.0   2.4   5.8
1809  -1.2  -3.7   0.6  -0.0   0.4  -0.6  -9.4  -1.2  -9.3  -7.8   3.0   2.9   6.2
1812  -1.1  -4.0   0.7  -0.2   0.3  -1.1 -10.9  -1.7 -10.5  -8.1   2.9   3.0   7.2
1815  -1.1  -3.9   0.5  -0.3   0.2  -0.7 -12.4  -1.1 -11.9  -8.7   3.3   3.0   8.2
1818  -1.2  -3.8   0.5  -0.7   0.3   0.6 -13.5   0.1 -13.2  -9.5   4.4   5.0   9.3
1821  -1.2  -4.1   0.1  -0.3   0.1   0.5 -14.5   0.4 -14.7 -10.0   4.6   4.8  10.3
1900  -1.3  -3.0  -0.2  -0.7  -0.4   1.1 -15.7   1.3 -15.3 -10.0   4.1   4.7  11.7
1903  -0.9  -1.4  -0.7  -1.0  -0.6   1.7 -16.0   2.4 -15.5  -9.4   3.1   4.3  12.4
1906  -1.3  -0.0  -0.5  -1.0  -0.1   1.7 -15.8   2.2 -15.5  -9.1   1.8   2.7  12.0
1909  -0.9   2.4  -0.3  -1.1   0.0   2.3 -15.2   2.6 -15.4  -8.8  -0.1   2.6  11.4
1912  -0.0   4.2  -0.4  -1.0  -0.0   2.2 -13.5   2.6 -14.7  -8.2  -2.0  -0.8  10.3
1915   0.7   3.8   0.6  -0.8   1.1   2.5 -11.5   1.8 -13.4  -7.6  -1.3  -1.6   7.6
1918   0.8   2.0   0.9  -0.4   1.2   3.1  -9.6   2.2 -12.0  -6.9   1.1   0.5   6.0
1921   0.4  -0.2   1.6  -0.3   1.5   2.8  -8.8   1.2 -11.1  -6.2   3.0   1.8   5.2
2000  -0.2  -0.7   1.0  -0.5   0.8   2.6  -8.3   1.6  -9.9  -5.1   3.3   2.9   6.2
2003  -0.1   0.5   0.1  -0.3  -0.1   1.9  -7.6   1.8  -8.5  -4.1   1.5   1.6   7.1
2006  -0.1  -1.1  -0.2   0.0  -0.2   1.4  -6.7   1.6  -7.3  -3.1   2.5   1.0   7.0
2009  -0.3  -1.5   0.6  -0.1   0.7   1.3  -6.2   0.7  -5.1  -2.1   2.8   1.8   5.9
2012  -0.9  -1.1   0.7   0.1   0.8   1.0  -5.9   0.3  -3.3  -1.2   2.1   1.2   5.5