⚡ HRRR · RRFS

📡 RRFS radar simulated composite reflectivity · our MetPy render from NOAA 3-km GRIB · HRRR init 10/02 20Z · 2 h old · RRFS init 10/02 18Z · 4 h old · updated 10/02 05:52 PM ET

RRFS renders hourly F001-F018 as NOAA publishes each cycle · valid times in ET on each map

⏱️ RAP nowcast newest hourly Rapid Refresh init Fri 4 PM ET · radar / CAPE + wind / hourly QPF / temp + dew point · next 3 h at 13 km · updates every hour · our MetPy render from NOAA open data

RAP publishes every hour, ~45 min after init - the freshest model guidance on this page for the next 3 hours. When HRRR/RRFS are holding on an old cycle during NOAA lag, this card still rolls.

⚔️ HRRR vs RRFS side-by-side · same valid time · where the two 3-km CAMs disagree · HRRR init 10/02 20Z · 2 h old · RRFS init 10/02 18Z · 4 h old · updated 10/02 05:52 PM ET

HRRR (init )

RRFS (init )

Valid times shown in ET · each panel labels its own init cycle · a panel reading "not rendered this cycle" means our updater hasn't produced that CAM's frame for this valid time yet - never a blank guess · a "waiting on NOAA" stamp means the model's newest published cycle is hours behind; rendering resumes the moment NOAA uploads it.

🚨 Severe weather SPC outlooks · CAM severe parameters · East-TN hail/rotation forecast

🌩️ SPC HRRR browser

Frames F001-F018 hourly · images served directly from www.spc.noaa.gov

🧮 Our RRFS + HRRR renders (MetPy × Cartopy from NOAA GRIB)