This amps feats considerably. Gremmy's meteor was a third the size of Seireitei, which means around 169765.272631 m. Gives a radius of 84882.6363155. Volume = 2.56×10^15 m^3.Taking two densities of 3000 kg/m^3 and 3700 we get a mass of 7,680,000,000,000,000,000 kg and 9,472,000,000,000,000,000 kg.
Taking 11 km/s speed, we get
Low end : 111,051,625,239,005,728 tonnes of TNT or High 6-A
High end : 136,963,671,128,107,088 tonnes of TNT or High 6-A
Um you where looking for gintama’s weather feat correct? It happenes in chapter 283
And there’s evidince it scales to gintoki’s dura and SS since a huge demon possessing one of the dudes in the wether duel Fires magic into the air ... and a storm is stated to get worst (so ether he the later fires makes the storm worst Or his mere presence does) gintoki tanks that beam while slightly amped