Geopotential [gpdm] on 500 hPa (shading)

• Geopotential [gpdm] on 500 hPa (white), contours at 552 gpdm
• Sea-level pressure [hPa] (black), contour interval = 5 hPa

Temperature [°C] on 850 hPa (shading)

• Temperature [°C] on 850 hPa (black dashes), contours at 0 °C
• Sea-level pressure [hPa] (black), contour interval = 5 hPa
• Wind barbs [m/s] on 850 hPa (black)

Temperature anomaly [K] on 850 hPa, based on ERA-5 1979-2020 (shading)

• Temperature percentiles on 850 hPa, based on ERA-5 1979-2020 (black), contours at monthly recurrence
• Temperature percentiles on 850 hPa, based on ERA-5 1979-2020 (grey), contours at yearly recurrence
• Temperature percentiles on 850 hPa, based on ERA-5 1979-2020 (white), contours where new record

Equivalent potential temperature [K] on 850 hPa (shading)

• Frontal volumes on 850 hPa (blue shading), contours at 0.5, 2
• Frontogenesis [K/(100 km)/s] on 850 hPa (dark blue), contours at 0.0002 K/(100 km)/s
• Frontogenesis [K/(100 km)/s] on 850 hPa (dark red), contours at -0.0002 K/(100 km)/s
• Convective available potential energy [J/kg] (light green), contours at 250 J/kg
• Convective available potential energy [J/kg] (yellow), contours at 500 J/kg
• Convective available potential energy [J/kg] (orange), contours at 1000 J/kg
• Convective available potential energy [J/kg] (red), contours at 2000 J/kg
• Sea-level pressure [hPa] (black), contour interval = 5 hPa

Total column water vapour [kg/m²] (shading)

• Column integral water vapour transport vector [kg m/s] (black arrows)
• Large-scale precipitation [mm/h] (magenta), contours at 1, 3, 10 mm/h
• Convective precipitation [mm/h] (cyan), contours at 1, 3, 10 mm/h
• Temperature [°C] on 850 hPa (dark red), contours at -5 °C

Column integral water vapour transport [kg m/s] (shading)

• Moisture pathways (yellow)
• Anomalous moisture pathways on Normalised by zonal/time average total column water vapour. (orange)
• Anomalous moisture pathways (2) on Normalised by annual average average total column water vapour. (dark red)
• Anomalous moisture pathways (3) on Normalised by seasonal average average total column water vapour. (brown)
• Large-scale precipitation [mm/h] (magenta), contours at 1, 3, 10 mm/h
• Convective precipitation [mm/h] (cyan), contours at 1, 3, 10 mm/h
• Temperature [°C] on 850 hPa (dark red), contours at -5 °C

10m Wind speed [m/s] (shading)

• 10m Wind gusts [m/s] (dark blue), contours at 17.2 m/s
• 10m Wind gusts [m/s] (orange), contours at 24.5 m/s
• 10m Wind gusts [m/s] (red), contours at 32.7 m/s
• 10m Wind barbs [m/s] (black)

Low cloud cover (shading)

• Mid-level cloud cover (orange shading), contours at 0.0, 0.0625, 0.1875, 0.3125, 0.4375, 0.5625, 0.6875, 0.8125, 0.9375, 1.0
• High cloud cover (white shading), contours at 0.0, 0.0625, 0.1875, 0.3125, 0.4375, 0.5625, 0.6875, 0.8125, 0.9375, 1.0

2m Relative humidity [%] (shading)

• Total precipitation [mm/h] (blue shading), contours at -1, 0.1, 0.2, 0.3, 0.5, 0.7, 1.0, 1.4, 2.0, 3.0, 5.0, 7.0, 10.0 mm/h
• Sea ice concentration (violet), contours at 0.2, 0.8
• Temperature [°C] on 850 hPa (dark red), contours at -5 °C

Surface sensible heat flux [W/m²] (shading)

• 10m Wind barbs [m/s] (black)
• Sea-surface temperature [°C] (grey), contours at -1, 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30 °C
• Sea ice concentration (violet), contours at 0.2, 0.8
• 10m Wind speed [m/s] (yellow), contours at 17.2 m/s
• 10m Wind speed [m/s] (orange), contours at 24.5 m/s
• 10m Wind speed [m/s] (red), contours at 32.7 m/s

Surface latent heat flux [W/m²] (shading)

• 10m Wind barbs [m/s] (black)
• Sea-surface temperature [°C] (grey), contours at -1, 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30 °C
• Sea ice concentration (violet), contours at 0.2, 0.8
• 10m Wind speed [m/s] (yellow), contours at 17.2 m/s
• 10m Wind speed [m/s] (orange), contours at 24.5 m/s
• 10m Wind speed [m/s] (red), contours at 32.7 m/s

Cold-air outbreak index [K] (shading)

• 10m Wind barbs [m/s] (black)
• Sea-surface temperature [°C] (grey), contours at -1, 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, 28, 30 °C
• Sea ice concentration (violet), contours at 0.2, 0.8

Potential temperature [K] on PV 2 (shading)

• Wind speed filtered to T84 [m/s] on PV 2 (black), contours at 30, 45, 60, 75, 90 m/s
• Jet axes on PV 2 (white, red/blue)