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Massive sunspot areas that brought near global displays of aurora lights earlier this month on Earth are now targeting Mars and creating intense solar weather on the Red Planet.
WW 270 SEVERE TSTM NE WY 202215Z – 210500Z 
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 270 NWS Storm Prediction Center Norman OK 415 PM MDT Mon May 20 2024 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Southwest Nebraska Panhandle Southeast Wyoming * Effective this Monday afternoon and evening from 415 PM until 1100 PM MDT. * Primary threats include... Scattered large hail events to 1.5 inches in diameter possible Isolated damaging wind gusts to 70 mph possible SUMMARY...Scattered severe storms are expected to from and spread east-northeastward across southeast Wyoming and the southwest Nebraska Panhandle, with the primary threats of hail 1-1.5 inches in diameter and severe gusts of 60-70 mph. The severe thunderstorm watch area is approximately along and 70 statute miles east and west of a line from 15 miles west northwest of Scottsbluff NE to 45 miles west of Sidney NE. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU0). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Severe Thunderstorm Watch means conditions are favorable for severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. Severe thunderstorms can and occasionally do produce tornadoes. && OTHER WATCH INFORMATION...CONTINUE...WW 268...WW 269... AVIATION...A few severe thunderstorms with hail surface and aloft to 1.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 450. Mean storm motion vector 25025. ...Thompson
WW 269 TORNADO CO KS NE 202210Z – 210500Z 
URGENT - IMMEDIATE BROADCAST REQUESTED Tornado Watch Number 269 NWS Storm Prediction Center Norman OK 410 PM MDT Mon May 20 2024 The NWS Storm Prediction Center has issued a * Tornado Watch for portions of Northeast Colorado Extreme northwest Kansas Extreme southwest Nebraska * Effective this Monday afternoon and evening from 410 PM until 1100 PM MDT. * Primary threats include... A couple tornadoes possible Scattered large hail and isolated very large hail events to 2.5 inches in diameter likely Scattered damaging wind gusts to 70 mph possible SUMMARY...A few supercells are expected to form this evening across northeast CO, and the storms will then move east-northeastward toward extreme southwest Nebraska and northwest Kansas through late evening/early tonight. Very large hail to 2.5 inches in diameter and severe gusts of 60-70 mph will be the main threats, though a gradual increase in low-level moisture later this evening will support the potential for a couple of tornadoes. The tornado watch area is approximately along and 90 statute miles east and west of a line from 60 miles north northwest of Akron CO to 30 miles south southwest of Akron CO. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU9). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Tornado Watch means conditions are favorable for tornadoes and severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. && OTHER WATCH INFORMATION...CONTINUE...WW 268... AVIATION...Tornadoes and a few severe thunderstorms with hail surface and aloft to 2.5 inches. Extreme turbulence and surface wind gusts to 60 knots. A few cumulonimbi with maximum tops to 450. Mean storm motion vector 26025. ...Thompson
One of the largest migrations on Earth happens in the dark ocean every night, as tiny jelly-like organisms work together to emerge from the deep sea to the surface. Biologists think the oceanic migration could inspire future robotic technology.
WW 268 SEVERE TSTM MI LM 202040Z – 210200Z 
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 268 NWS Storm Prediction Center Norman OK 440 PM EDT Mon May 20 2024 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Western and Central Lower Michigan Lake Michigan * Effective this Monday afternoon and evening from 440 PM until 1000 PM EDT. * Primary threats include... Isolated damaging wind gusts to 65 mph possible Isolated large hail events to 1.5 inches in diameter possible SUMMARY...Thunderstorms currently moving across Lake Michigan will spread into Lower Michigan soon. A few of the storms may pose a risk of locally damaging wind gusts and hail through early evening. The severe thunderstorm watch area is approximately along and 55 statute miles east and west of a line from 55 miles northeast of Muskegon MI to 15 miles southeast of Kalamazoo MI. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU8). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Severe Thunderstorm Watch means conditions are favorable for severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. Severe thunderstorms can and occasionally do produce tornadoes. && OTHER WATCH INFORMATION...CONTINUE...WW 267... AVIATION...A few severe thunderstorms with hail surface and aloft to 1.5 inches. Extreme turbulence and surface wind gusts to 55 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 25030. ...Hart
WW 267 SEVERE TSTM IL WI LM 201740Z – 202200Z 
URGENT - IMMEDIATE BROADCAST REQUESTED Severe Thunderstorm Watch Number 267 NWS Storm Prediction Center Norman OK 1240 PM CDT Mon May 20 2024 The NWS Storm Prediction Center has issued a * Severe Thunderstorm Watch for portions of Northern Illinois Southeast Wisconsin Lake Michigan * Effective this Monday afternoon from 1240 PM until 500 PM CDT. * Primary threats include... Scattered large hail and isolated very large hail events to 2 inches in diameter possible Scattered damaging wind gusts to 65 mph possible A tornado or two possible SUMMARY...Scattered thunderstorms are developing ahead of a low over southwest Wisconsin. These storms may pose a risk of hail and damaging wind gusts through the afternoon. There is also a small area of extreme southeast WI with a risk of a tornado or two. The severe thunderstorm watch area is approximately along and 60 statute miles north and south of a line from 15 miles west northwest of Janesville WI to 5 miles south southeast of Racine WI. For a complete depiction of the watch see the associated watch outline update (WOUS64 KWNS WOU7). PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER...A Severe Thunderstorm Watch means conditions are favorable for severe thunderstorms in and close to the watch area. Persons in these areas should be on the lookout for threatening weather conditions and listen for later statements and possible warnings. Severe thunderstorms can and occasionally do produce tornadoes. && AVIATION...A few severe thunderstorms with hail surface and aloft to 2 inches. Extreme turbulence and surface wind gusts to 55 knots. A few cumulonimbi with maximum tops to 500. Mean storm motion vector 26030. ...Hart