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More scattered severe thunderstorms can be expected ahead of a cold front in New Mexico today. Vance became a hurricane last night, and Typhoon Champi is passing between the Japanese island chain and Taiwan.

What was Super Typhoon Champi has also moved north toward the Japanese island chain and Taiwan, now larger and considerably weaker (around Cat 2-3 intensity). Thanks to MRRL and aguacerowx's efforts, radar data from Japan is now available to see and interact with!

Scattered severe thunderstorms with large hail, damaging winds, and flash flooding are ongoing tonight in Arizona and New Mexico.

Tropical Storm Vance has formed in the East Pacific and will probably be a major hurricane this weekend. Scattered severe weather is likely again around Arizona today.

Strong/intense tornado just occurred near the town of Overgaard in Arizona.

Subtropical Storm Josephine has formed off the East Coast of the U.S this evening. Gusty winds will be possible until it becomes extratropical tomorrow.

Supercell with strong rotation passing over Flagstaff, Arizona, heading Northeast.

Severe thunderstorms are likely in Arizona today, featuring very large hail and a few tornadoes! 94E in the East Pacific is likely to become a strong hurricane this weekend.

UPDATE: Champi has now been upped to 155kt/180mph sustained winds with a central pressure of 899mb. #Champi

Champi has become a truly giant super typhoon now. The storm completed another eyewall replacement last night and is now a stunningly large and strong Category 5.

Super Typhoon Champi is now a very large Category 5 storm this morning as it moves WNW. The storm will generally move WNW for the next few days before approaching Taiwan.

Champi has gotten very close to the PGUA radar, but it remains online so far! Capturing a classic double eyewall structure.

Typhoon Champi has been rapidly intensifying today and soon will pass through the Mariana islands, closest to Guam. Champi will likely be a powerful super typhoon this weekend/next week.

Hurricane Trudy is now rapidly intensifying in the East Pacific and will become a major hurricane soon. Champi has been named in the West Pacific and will become a powerful typhoon near the end of the weekend.

Oklahoma and Texas have received much needed rainfall this week, with 4-8 inches falling in the last 48h across large swaths of the state. This has also caused scattered flooding, but it also should move out with time today.

Hurricane Simon and TS Trudy continue to make things look tangled in the East Pacific. 29W in the West Pacific will likely become a powerful typhoon by the end of this weekend/start of next week.

A substantial flooding risk is present and ongoing today in central Oklahoma, where >10 inches of rain have fallen locally, and that amount will increase through the day today. Some severe weather is also possible.

Scattered severe thunderstorms have consolidated in the central plains today. Main threat is very large, destructive hail for right now. A couple tornadoes and severe winds are possible as well.

Hurricane Simon is going to be a slow moving hurricane for most of the week as other areas of interest begin to spin up, most notably 93E and 96W. Both invests will likely become powerful tropical cyclones later this week.

Hurricane Simon skirted around Mexico yesterday and is still alive. Likely will meander and slowly weaken throughout the rest of this week before landfalling in Mexico.

A strong tornado is ongoing and heading toward Beulaville, North Carolina. TAKE SHELTER! This tornado has lofted debris >10,000 feet in the air!

Another potentially strong tornado ongoing near Katesville and Louisburg, NC.

Strong tornado likely ongoing in the suburbs of Raleigh, NC, near Rolesville.

A string of supercells has consolidated over North Carolina as we enter lunch time. This includes an observed tornado near Fayetteville, and a likely tornado near the Raleigh metro area.

The East-Central pacific has officially eclipsed the ACE (Accumulated Cyclone Energy) record that was set in 2018, at 319.2 as of this morning. Additional disturbances + Hurricane Simon are likely to increase the number further in the next 2 weeks.

Hurricane Simon makes it's closest pass to Mexico today and is currently a Category 4 hurricane. Extreme winds can be expected around the landfall area! Meanwhile, Post-tropical Rachel and Isaias are contributing to inclement weather on both sides of the U.S.

A couple tornadic supercells have popped up around the GA/SC border and may be capable of a few tornadoes. One already occured just NE of Statesboro.

Isaias has become post-tropical this morning, so mainly a flood threat with gusty winds from this point onward. Several tornadoes look possible today, as well as a couple additional inches of rainfall in most places.

(Note: I said earlier Isaias may have been a Category 4 hurricane based on flight-level wind data. It doesn't appear these winds made it to the surface, but intense wind gusts >115mph remain possible.)

The eyewall of what is now Category 2 Hurricane Isaias is moving onshore! A couple gusts >100mph have been recorded, and a flash flood emergency including Eglin AFB has been issued. #Isaias has started weakening quickly from it's jet interaction. #HurricaneIsaias

UPDATE: EXTREME WIND WARNING for Florida coastline from Isaias (outlined in purple/black) TAKE SHELTER NOW! #Isaias #HurricaneIsaias

Conditions are deteriorating rapidly in the Florida Panhandle as Hurricane Isaias' eyewall is imminent. Flooding has begun, most notably around Panama City. Many gusts in the 50-60mph range already. #Isaias #HurricaneIsaias

A likely intense waterspout is coming onshore of the Florida coastline within the hour.

This is also completely unrelated, but it appears that an extremely intense Magnitude 8 earthquake has occurred in Panama. (Source: USGS)

Recent hurricane hunter data suggests Hurricane Isaias may have intensified into a Category 4 this afternoon. Max wind speeds at 700mb were 136kt (~120kt/140mph at surface). A Tornado Watch has also been issued as tropical supercells come onshore today. #Isaias #HurricaneIsaias

A very complicated and active picture today for North America. TS Watches are now in effect in California ahead of Rachel's arrival this weekend. Simon is rapidly intensifying off the coast of Mexico as well.

A few tornadoes are possible this evening and tonight as Isaias makes landfall.

The timing of #Isaias beginning extratropical transition has also trended slightly later, so the storm may make landfall closer to peak intensity. Some further strengthening is possible. A dangerous hurricane is landfalling this evening. #HurricaneIsaias

Isaias has become a Category 3 Major Hurricane this morning on it's final approach to landfall. The pressure is dropping pretty quickly according to recon data, and VHTs have continued to go up on both sides of the eyewall. #Isaias #HurricaneIsaias

Isaias has become a Category 2 Hurricane and has closed off an eyewall. Intensification likely to pick up in the next few hours.

This shows the google trend better. (From TC-ATLAS) The median now is at category 4 intensity, and all hurricane models now make it at least a high end category 3 hurricane tonight into tomorrow morning. The risk of destructive winds from #Isaias is increasing.

Hurricane Isaias has been slowly strengthening today, but a couple signs have showed up that suggests the pace is picking up now or imminently. Mainly that models have shear being minimized from now into tonight, and an uptrend in intensity from the google and hurricane models.

Meanwhile, Rachel is setting up to do something similar (but this time on the West Coast). Simon is also going to become a major hurricane that threatens parts of the Mexico coastline. Lot of moving parts at the moment!

The good news is this will provide drought alleviating rain for much of the Eastern U.S. The bad news is, about nothing else about this is pleasant. Damaging wind gusts and several tornadoes will be possible.

#Isaias became a hurricane last night and has strengthened a bit more since then. The wind field of Hurricane Isaias has also started broadening out. Isaias will move inland at a fast pace, so impacts will extend pretty far inland as a result.

#Isaias is about to become a hurricane tonight. Hurricane hunters have reported a 7nmi, circular eyewall, and pressure has been dropping rapidly throughout the day, now in the 980s. Storm surge warnings and hurricane warnings are now in place.

UPDATE: Watches have been issued along the Gulf Coast, including Mobile AL, ahead of Isaias. #Isaias has begun strengthening this morning according to air force recon data.

Most guidance now favors #Isaias becoming a hurricane soon, and NHC now has it on the edge of becoming a major hurricane, then with gradual weakening before landfall.