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Heavy Rain From the Plains to the Northeast; Heat Wave Begins

Severe thunderstorms and heavy rainfall are likely across parts of the Northeast, portions of the northern and central Plains, and the Ohio Valley. Portions of northeast Missouri and central Illinois could experience locally significant flash flooding. Dangerously hot conditions are expected in the Central Plains, Lower and Middle Mississippi Valley, and Southeast. Read More >

Observed Model Pressure Differences

Observation Pressure Gradient Table
National Weather Service, Anchorage AK Forecast Office
Sun Jul 20 21:10:02 GMT 2025

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 
1922   0.3   0.9  -0.7     m  -1.5  -2.9     m  -2.2     m   4.4  -3.8  -5.5  -4.5 
1923   0.3     m  -1.1     m  -2.1  -3.4   2.7  -2.3     m   4.0     m  -5.9  -4.5 
2000   0.2   1.0  -1.0     m  -1.8  -3.9     m  -2.9     m   4.1  -4.9  -6.1  -5.0 
2001     m     m     m     m  -1.5     m     m  -3.0     m   3.9  -5.0  -6.3  -5.2 
2002   0.0   1.0  -0.9     m  -1.6  -4.3   2.8  -3.4     m   4.0  -5.3  -6.4  -5.4 
2003   0.1   0.9  -0.8     m  -1.2  -4.5     m  -3.7     m   3.7  -5.4  -6.8  -5.6 
2004   0.1   0.7  -1.0     m  -1.3  -4.6   3.0  -3.6     m   3.7  -5.3  -6.7  -5.6 
2005   0.1     m  -0.5     m  -1.0  -4.5     m  -4.0     m   3.6     m  -6.7  -5.5 
2006   0.2   0.9  -0.2     m  -0.6  -4.0   2.7  -3.8     m     m  -4.9  -6.8  -5.5 
2007  -0.2   0.4  -0.6     m  -0.8  -4.1     m  -3.5     m   3.2  -4.5  -6.6  -4.7 
2008  -0.1   0.5  -0.2     m  -0.5  -3.5     m  -3.3     m   3.0  -4.0  -6.1  -4.9 
2009  -0.1   0.5  -0.3     m  -0.7  -3.1   2.9  -2.8     m   3.0  -3.6  -5.7  -4.3 
2010   0.2   0.5   0.0     m  -0.5  -2.8     m  -2.8     m   2.8  -3.3  -5.5  -4.3 
2011   0.0     m     m     m     m  -2.4     m     m     m   3.2     m  -5.2     m 
2012   0.1   0.6   0.0     m     m  -1.6     m  -1.6     m   3.5  -2.2  -4.4  -3.8 
2013   0.1   0.6   0.1     m  -0.2  -1.6   2.8  -1.7     m   4.4  -2.2  -4.6  -4.0 
2014   0.1   0.6     m     m     m  -1.3     m     m     m   4.8  -1.9  -4.0     m 
2015   0.4     m   0.0     m  -0.3  -1.0   3.0  -1.0     m   4.8     m  -4.0  -3.7 
2016   0.4   0.9   0.3     m   0.1  -1.0   3.0  -1.3     m     m  -1.9  -4.1  -4.1 
2017   0.7   1.2     m     m     m  -0.8     m     m     m     m  -2.0  -4.2     m 
2018   1.1   1.3   0.4     m  -0.1  -0.7     m  -1.1     m     m  -2.0  -4.2  -4.3 
2019   0.6   1.1     m     m     m  -1.2     m     m     m   3.9  -2.3  -4.5     m 
2020   1.3   1.7   0.6     m   0.1  -1.0   3.5  -1.6     m   3.1  -2.7  -4.6  -5.0 
2021   1.0   1.7     m     m     m  -1.5     m     m     m   2.0  -3.2  -5.2     m 

 


Forecast Model Pressure Differences

 North American Mesoscale Model

Model Forecast Pressure Gradient Table
National Weather Service, Anchorage AK Forecast Office
Sun Jul 20 15:30:01 GMT 2025

('    ', 'ETA242', 'Pressure Difference Forecast (', '20250720_1200', ' 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 
2012   0.5   0.6  -0.1  -0.2  -0.0  -1.7   2.4  -1.6   3.1   2.4  -2.2  -2.4  -3.6
2015   0.8   0.3  -0.0   0.4  -0.0  -1.1   3.1  -1.1   4.3   3.6  -1.5  -1.4  -3.5
2018   1.3   1.1  -0.4   0.1  -0.5  -0.9   4.1  -0.5   5.3   3.9  -1.9  -1.5  -2.8
2021   1.6   1.6  -0.3   1.0  -0.1  -1.3   5.4  -1.0   2.9   1.4  -2.9  -2.6  -4.4
2100   2.0   1.9  -0.0   0.6   0.2  -2.0   5.1  -1.9   0.2  -0.8  -3.9  -3.7  -6.0
2103   2.1   2.7  -0.1  -0.5  -0.1  -0.7   4.5  -0.6  -1.7  -1.6  -3.4  -2.8  -7.6
2106   1.5   1.7  -0.4  -1.1  -0.6  -1.6   3.6  -1.2  -2.4  -1.8  -3.3  -3.1  -6.6
2109   0.7   0.2  -0.5  -1.7  -0.6  -2.2   2.4  -1.7  -2.7  -1.5  -2.3  -2.4  -4.4
2112  -0.0  -1.2  -0.4  -1.5  -0.5  -2.7   1.9  -2.3  -3.2  -1.8  -1.5  -1.8  -3.1
2115  -0.7  -2.3  -0.5  -1.3  -0.5  -2.7   0.9  -2.1  -3.2  -1.7  -0.4  -0.6  -2.3
2118  -1.3  -3.4  -0.5  -1.4  -0.7  -2.8  -0.3  -2.3  -3.1  -2.0   0.6   1.0  -2.4
2121  -1.8  -3.9  -0.5  -1.4  -0.5  -3.5  -0.8  -3.0  -3.0  -2.2   0.4   0.9  -2.5
2200  -2.2  -4.3  -0.9  -1.3  -0.7  -4.3  -0.8  -3.3  -2.9  -2.1  -0.0   0.5  -1.6
2203  -1.9  -3.9  -1.4  -1.5  -1.2  -4.4  -1.7  -3.0  -2.8  -1.7  -0.6  -0.4  -0.2
2206  -1.6  -3.8  -0.9  -1.0  -0.7  -4.4  -1.6  -3.5  -3.5  -1.9  -0.6  -0.7   0.2
2209  -1.2  -3.7  -0.3  -0.4  -0.1  -4.1  -2.3  -3.8  -4.6  -2.6  -0.4  -0.3   0.8
2212  -1.5  -4.1  -0.3  -0.0  -0.2  -4.0  -2.3  -3.7  -5.4  -3.3   0.1   0.0   1.4
2215  -1.6  -4.2  -0.6  -0.4  -0.9  -3.6  -2.0  -3.0  -5.2  -2.9   0.5   0.5   1.8
2218  -1.8  -4.3  -1.3  -0.6  -1.6  -4.1  -2.2  -2.8  -5.0  -2.8   0.2   0.6   2.4
2221  -2.0  -4.3  -1.5  -0.7  -1.7  -4.7  -2.3  -3.2  -5.2  -3.4  -0.4   0.7   2.8
2300  -1.8  -3.6  -1.5  -1.2  -1.7  -4.8  -3.0  -3.3  -6.0  -4.1  -1.3   0.2   3.2
2303  -2.1  -3.2  -1.1  -1.6  -1.7  -5.0  -3.0  -4.0  -6.6  -4.0  -1.8  -0.4   2.5
2306  -1.3  -2.9  -0.5  -1.9  -1.2  -4.9  -2.9  -4.4  -6.5  -3.0  -2.0  -0.9   2.1
2309  -1.3  -3.4  -0.3  -1.9  -1.2  -5.1  -3.3  -4.7  -6.4  -2.7  -1.6  -0.5   1.7
2312  -0.8  -3.8  -0.1  -1.6  -1.0  -4.0  -3.4  -3.8  -6.7  -3.0  -0.2   0.3   1.2
2315  -0.9  -4.3  -0.1  -1.4  -1.0  -3.3  -3.2  -3.3  -6.5  -3.2   1.0   1.2   0.5
2318  -1.3  -4.6  -0.5  -1.4  -1.4  -2.9  -3.0  -2.4  -6.4  -3.3   1.7   2.2   0.8
2321  -1.7  -4.3  -0.5  -1.6  -1.5  -2.5  -3.6  -1.9  -6.6  -3.6   1.8   2.0   1.0
2400  -1.4  -3.7  -0.5  -1.8  -1.7  -2.3  -3.9  -1.7  -6.7  -3.6   1.4   1.6   1.0