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Back-to-Back Pacific Storms to Impact the West Coast; Heavy Snow in the Central Appalachians

Back-to-back powerful Pacific storm systems to impact the Pacific Northwest and northern California through the end of this week with heavy rain, flooding, strong winds, and higher elevation mountain snow. A strong, long-duration atmospheric river will accompany the Pacific storms, bringing excessive rainfall and flash flooding to southwest Oregon and northwest California through the week. Read More >

Observed Model Pressure Differences

Observation Pressure Gradient Table
National Weather Service, Anchorage AK Forecast Office
Thu Nov 21 08:10:02 GMT 2024

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 
2009  -5.1     m   0.2   0.3  -0.6  11.9  -5.3  11.7  -3.6  -6.5     m  11.5   5.6 
2010  -5.7     m   0.3   0.4  -0.4  11.9  -5.1  11.6  -3.5  -6.3     m  11.7   5.2 
2011  -5.9     m   0.2   0.8  -0.3  12.1  -5.4  11.9  -3.6  -6.1     m  12.2   5.3 
2012  -6.0     m   0.5   0.5  -0.4  12.6  -5.6  12.1  -3.9  -7.0     m  13.1   4.6 
2013  -6.5     m   0.4   1.0  -0.3  12.0     m  11.6  -4.1  -7.5     m  13.0   4.9 
2014  -6.8     m   0.8   0.7   0.1  12.0  -5.5  11.2  -3.6  -7.0     m  13.7   4.2 
2015  -7.3  -8.5   0.5   1.1  -0.2  11.8  -5.0  11.3  -3.5  -7.1  20.3  14.4   4.2 
2016  -7.1  -8.9   0.1   1.4  -0.2  12.2  -5.2  12.1  -4.2  -7.2  21.1  14.6   4.1 
2017  -7.7  -9.1   0.3   1.3  -0.2  12.0  -5.1  11.7  -4.1  -7.1  21.1  14.5   3.5 
2018  -7.7  -8.9   0.2   1.2   0.0  12.3  -5.2  12.1  -4.2  -7.3  21.2  15.2   4.0 
2019  -7.9  -9.1   0.2   1.2  -0.3  11.8     m  11.6  -4.4  -7.9  20.9  14.6   4.3 
2020  -7.0  -9.4   0.4   0.8  -0.4  11.6  -5.5  11.2  -4.6  -8.6  21.0  14.5   4.5 
2021  -7.4  -9.2  -0.1   1.1  -0.7  11.5  -5.5  11.6  -4.6  -8.5  20.7  14.6   4.4 
2022  -8.3  -9.2  -0.3   1.3  -0.8  11.7  -5.4  12.0  -4.5  -8.6  20.9  14.4   4.6 
2023  -8.1  -9.0  -0.2   2.5  -0.2  11.2  -5.0  11.4  -5.5  -9.4  20.2  14.0   4.3 
2100  -8.1  -9.2   0.0   2.4  -0.2  11.5     m  11.5  -5.2  -8.7  20.7  15.1   4.0 
2101  -8.5  -8.9   0.4   2.1   0.0  11.5     m  11.1  -5.2  -8.8  20.4  14.9   4.3 
2102  -8.1  -8.8   0.5   2.4   0.1  11.5     m  11.0  -5.4  -8.3  20.3  14.8   4.2 
2103  -8.3  -8.4   0.2   2.2  -0.5  11.3  -6.2  11.1  -5.3  -8.6  19.7  14.8   4.8 
2104  -8.0  -8.4   0.2   1.7  -0.6  11.3  -6.5  11.1  -4.9  -8.5  19.7  14.6   4.8 
2105  -8.7  -8.6   0.0   1.8  -0.7  11.3     m  11.3  -4.8  -7.8  19.9  14.8   4.5 
2106  -8.7  -8.6   0.4   2.0   0.1  11.3  -6.1  10.9  -4.7  -7.3  19.9  14.8   3.6 
2107  -8.3  -8.6  -0.1   2.0  -0.3  11.4  -6.0  11.5  -4.6  -7.9  20.0  14.9   3.9 
2108     m  -8.2   0.2   1.9   0.0  10.9  -6.2  10.7  -4.8  -8.2  19.1  13.8   4.5 

 


Forecast Model Pressure Differences

 North American Mesoscale Model

Model Forecast Pressure Gradient Table
National Weather Service, Anchorage AK Forecast Office
Thu Nov 21 03:30:01 GMT 2024

('    ', 'ETA242', 'Pressure Difference Forecast (', '20241121_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 
2100  -3.1  -9.1   0.2   3.9   0.4   9.1  -5.5   8.8  -7.7  -8.9  18.1  13.2   5.6
2103  -1.7  -6.2  -0.5   3.1  -0.5   8.5  -4.4   9.0  -5.1  -5.5  14.7  10.0   4.9
2106  -2.2  -7.5  -0.0   2.7  -0.3   6.9  -5.0   6.9  -5.8  -5.6  14.4  10.5   4.0
2109  -2.2  -6.6  -0.1   2.6  -0.3   7.3  -6.0   7.4  -6.3  -5.5  13.9  10.5   4.6
2112  -1.9  -6.6  -0.4   2.4  -0.8   6.9  -6.5   7.3  -6.4  -5.6  13.6  10.3   4.9
2115  -1.8  -7.2  -0.5   2.2  -0.9   6.1  -5.9   6.6  -6.2  -5.9  13.3   9.8   4.5
2118  -1.8  -7.3  -0.2   1.9  -0.4   5.5  -5.7   5.7  -5.2  -5.4  12.8   9.4   3.8
2121  -2.1  -7.0  -0.1   1.9  -0.3   4.7  -5.7   4.8  -5.1  -5.0  11.7   9.0   4.0
2200  -2.3  -6.8  -0.2   2.2  -0.2   4.4  -6.1   4.7  -4.8  -4.9  11.2   8.6   4.8
2203  -1.9  -6.3   0.1   2.5   0.3   4.4  -6.4   4.3  -4.8  -4.5  10.6   7.8   4.8
2206  -1.7  -6.0   0.2   2.2  -0.0   3.7  -6.2   3.5  -4.2  -4.2   9.7   6.3   5.2
2209  -1.7  -6.3   0.4   2.4   0.1   2.8  -5.8   2.4  -3.7  -4.1   9.2   5.3   5.7
2212  -1.4  -6.1   0.3   2.0  -0.3   2.4  -5.3   2.1  -2.8  -3.1   8.5   4.8   6.4
2215  -1.2  -5.8   0.0   1.9  -0.6   2.4  -4.0   2.4  -1.6  -2.0   8.2   4.4   7.0
2218  -1.2  -5.6  -0.4   2.1  -0.7   2.8  -3.2   3.2  -1.4  -1.5   8.4   4.6   7.0
2221  -1.9  -5.9  -0.4   2.2  -0.5   3.4  -3.2   3.8  -1.6  -1.1   9.3   5.8   7.2
2300  -1.7  -5.3  -0.8   2.1  -1.0   3.7  -2.4   4.5  -1.9  -1.2   9.1   5.6   6.9
2303  -1.3  -5.1  -0.7   2.3  -0.8   4.6  -1.1   5.3  -1.6  -0.8   9.7   6.1   5.9
2306  -1.4  -4.5  -0.4   2.1  -0.5   6.0  -0.8   6.4  -1.6  -0.0  10.5   7.6   5.1
2309  -1.2  -3.7  -0.6   1.8  -0.6   6.6  -0.2   7.2  -1.3  -0.3  10.3   8.0   4.6
2312  -1.1  -2.6   0.1   1.8   0.2   6.8   0.7   6.7  -1.5  -0.5   9.5   7.6   2.7
2315  -1.0  -1.7  -0.2   1.0  -0.4   7.1   1.9   7.3  -1.5  -0.3   8.8   7.1   1.2
2318  -0.5   0.1  -0.1   0.3  -0.2   7.0   2.4   7.1  -1.8  -0.5   6.9   6.0  -1.0
2321   0.3   1.0   0.1  -0.4  -0.0   5.8   1.7   5.8  -2.6  -1.5   4.9   5.7  -1.9
2400   0.4   0.7   0.1  -0.3   0.1   4.5   0.2   4.3  -3.4  -2.5   3.7   4.0  -1.4
2403   0.6   0.6   0.2   0.3   0.2   4.9  -0.3   4.7  -3.8  -2.1   4.3   4.0  -0.6
2406   0.4   0.2   0.5   0.6   0.4   5.5  -0.1   4.9  -4.0  -2.4   5.3   4.8  -0.1
2409   0.1  -0.8   0.5   0.8   0.3   5.6   1.0   5.2  -3.3  -2.4   6.5   5.9   0.0
2412   0.2  -1.1   0.3   0.9   0.2   5.6   2.3   5.4  -2.7  -1.9   6.7   5.5  -0.6