Forecast Discussion 4/18-4/21/23 Blog Post (author: Emily Melvin) – EAS Synoptic and Mesoscale Meteorology Blog

Figure 1:12 z Wednesday April 19^th 2023 GFS forecast. 500mb cyclonic vorticity (10^-5 s^-1) shaded, with geopotential height contoured in black (every 60 m) and wind barbs. Map from Tropical Tidbits.

Figure 2: 12z Wednesday April 19^th 2023. 700 hPa heights contoured in black (every 30 m), QG omega vorticity term shaded (x10^-12 Pa m^-2 s^-1.) Map from Thomas Galarneau.

Figure 3: 12z Thursday April 20^th 2023 GFS forecast. 250 mb wind speed and streamlines (kt) shaded, Surface pressure extrema labeled in mb. Map from Tropical Tidbits.

Figure 4: 12z Thursday April 20^th 2023. 700 hPa heights contoured in solid black (every 30 m), temperature contoured in dashed green (every 3 degrees C), Q vectors (arrows in 10^-7 Pa m-1 s-1), and QG omega forcing shaded (x10^-12 Pa m^-2 s^-1) . Map from Thomas Galarneau.