A continued severe weather risk will accompany storms entering the Ohio Valley and Appalachians today.
The main concern will be sporadic damaging gusts.
@matthewcappucci.bsky.social has an update.
myradar.com/videos/6473
Widespread strong/severe storms will impact the Midwest, Corn Belt, and Plains today!
Multiple “storm modes” are expected — windy squall line(s) AND some tornadic supercell. Isolated strong tornado.
@matthewcappucci.bsky.social has an important update.
myradar.com/videos/6471
Numerous strong/severe thunderstorms are likely Friday from the Upper Midwest to the Plains. Damaging winds, large hail and a few strong tornadoes are expected.
@matthewcappucci.bsky.social has a severe weather preview.
myradar.com/videos/6470
Every year or two, Del Rio, Texas gets a large damaging hailstorm.
Tonight MAY be the night. Isolated supercell with baseball-sized hail possible.
@matthewcappucci.bsky.social has an update.
myradar.com/videos/6469
An isolated hail-producing supercell is possible in Arkansas after 3-4 p.m.
Large, damaging hail up to baseball size is possible.
@matthewcappucci.bsky.social has an update.
myradar.com/videos/6468
A few strong to severe thunderstorms may form along a stalled frontal boundary in New York State after 2 p.m.
Damaging gusts, hail, or an isolated tornado are possible.
@matthewcappucci.bsky.social has an update.
myradar.com/videos/6467
We're monitoring a differential heating boundary in New York State that may serve as a focus for several rotating supercells. Some tornado threat.
Moisture has pooled north of boundary/hasn't mixed out. Convergence along boundary/extra helicity too.
Video update soon.
A few strong to severe thunderstorms are expected in Oklahoma, north Texas, southeast Kansas, northwest Arkansas, or Missouri.
Large hail up to the size of hen eggs, as well as an isolated tornado or damaging gusts, is expected.
@matthewcappucci.bsky.social has an update.
myradar.com/videos/6464
Strong to severe thunderstorms are possible in the Corn Belt and Midwest along a warm front.
Hail, sporadic damaging gusts, and an isolated tornado are possible. The I-80 corridor in Iowa may have the greatest risk.
@matthewcappucci.bsky.social has an update from Grinnell.
myradar.com/videos/6463
A stunning, up-close look at a tornado near Wyoming, IA, just moments ago, captured by MyRadar storm chaser @jordanhallwx.bsky.social.
Supercells will form in the next 60-90 minutes in Iowa. They’ll move into Illinois and Wisconsin with:
• Hail up to SOFTBALL size
• Several tornadoes, some strong (EF2 or EF3)
• Torrential rain, lightning, & wind.
@matthewcappucci.bsky.social has an update from Waterloo.
myradar.com/videos/6461
Multiple zones of severe weather are likely today:
• Supercells with tornadoes/baseball hail in Wisconsin/Iowa/Illinois
• A few windy squalls in New England
• Scattered dryline supercells central/southern Plains
@matthewcappucci.bsky.social has an update.
myradar.com/videos/6459
A tornado forming and touching down near Amboy, Minnesota on Monday, April 13 — captured in 360° by MyRadar storm chaser @jordanhallwx.bsky.social.
Large to GIANT hail possible in northwest Illinois, eastern Iowa and southern Wisconsin IF rotating supercells become established (which we expect to happen).
Here's expected peak hail size that the atmosphere can support today (on an isolated basis):
TUESDAY, April 14 – UPGRADE with a STRONG TORNADO risk! The Storm Prediction Center noting that tornadoes may reach EF3 or greater strength in the strongset storms between Dubuque, Rockford and Madison. This includes in the Platteville to Janesville to Freeport stretches as well.
There's an increasing chance that the cap DOES break, at least on an isolated basis, along the dryline in central Oklahoma or the Red River Valley of Texas.
An isolated supercell could produce hail up to baseball size or an isolated tornado.
A tornado watch will be issued soon for the I-90 corridor.
If a supercell can anchor to the warm front and gobble up helicity (spin) along it, an isolated strong (EF2+) tornado would be possible.
Isolated hail up to softball size may accompany the strongest storms that form/anchor to the warm front!
We're really watching southeastern South Dakota, extreme northwest Iowa and far southwest Minnesota:
A tornado watch is coming soon for eastern Minnesota and central Wisconsin, including La Crosse, Oshkosh, Appleton and perhaps Madison.
Conditions are becoming conducive to supercell development, with the risk of large, destructive hail and a couple tornadoes, perhaps EF2+.
A few rotating supercells are likely in portions of Minnesota and Wisconsin. Extreme northern Iowa and southeastern South Dakota may get storms too. Destructive hail and a couple of tornadoes are likely.
@matthewcappucci.bsky.social has an update.
myradar.com/videos/6456
The risk for large, damaging hail will accompany the strongest storms today.
The most robust thunderstorm updrafts could produce hail between hen egg and baseball size.
We've manually adjusted the significant hail risk zone to include northern Illinois.
Multiple tornadoes, including the potential for an isolated significant EF2+ tornado, are expected in Minnesota and Wisconsin today.
We also believe there's an increasing chance for tornado activity in northern Illinois; SPC will likely adjust their map accordingly.
Today’s forecast is very annoying: mostly sunny with a slight chance of tornadic supercells. We *still* don’t know if thunderstorms will sprout on the dryline. It’s a “conditional” risk in OK/ KS/TX.
@matthewcappucci.bsky.social has an update.
myradar.com/videos/6455
This could be a locally significant severe weather episode where storms track, BUT it won't be widespread. Only a couple storms will form. However, those that do will likely be intense.
We're noticing a lot of dry air at the mid-levels of the atmosphere, which helps to allow supercooled water droplets to stick onto growing hailstones, making them bigger. Plus temperatures get chilly FAST as one climbs higher into the atmosphere.
Any thunderstorm cells, including those on the cool side of the boundary, may be able to produce large, destructive hail. A couple instances of baseball-sized hail are possible. (If you live in Minneapolis, perhaps consider parking your car in the garage or beneath a carport *just in case*).
Cells on the warm side of the front (south) will pose the risk of a couple tornadoes, and perhaps an isolated significant EF2+ tornado. If supercell(s) can latch onto the warm front, they'll gobble up extra low-level helicity (spin) and rotate even more.
We'll have a low pressure center near Brookings lifting a warm front north. Multiple rotating supercells are likely to form along the warm front, perhaps between Watertown, Minneapolis and Green Bay, Wisconsin.
MONDAY, April 13 will feature a legitimate tornado/BIG hail risk across the Twin Cities and Upper Midwest! Minnesota, Wisconsin and northern Iowa – pay close attention!
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