December 10, 2021 archive

Dec 10

VIDEO: Severe Weather And Tornado Threat Late This Evening And Early Saturday…

Updated 12.10.21 @ 5:05p

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Permanent link to this article: https://indywx.com/2021/12/10/video-severe-weather-and-tornado-threat-late-this-evening-and-early-saturday/

Dec 10

Client Brief: Severe Weather Event Overnight-Predawn Saturday…

Updated 12.10.21 @ 7:29a

Type: Severe weather event

The Storm Prediction Center has expanded both the ‘Slight’ and ‘Enhanced” risk zones northeast with the Friday morning update.

What: Severe weather outbreak

When: 12a to 8a Saturday, 12.11.21

Severe Risks: Damaging straight line winds and tornadoes

Summary: A strengthening surface low pressure system will lift northeast out of the central Plains this morning into the Great Lakes region by Saturday morning. A strong cold front will trail the area of low pressure and press east across Indiana Saturday morning. Ahead of the front, unseasonably warm and humid air will be drawn north to encompass most of the state. We’ll really notice a surge in moisture levels as we progress through the afternoon and evening hours. Dew points will rise from the 40s now into the lower and middle 60s all the way north to include central Indiana during the overnight and predawn hours Saturday. While CAPE (convective available potential energy) will be in question, which is typical with late fall/ early winter severe set-ups, the concern here is that we’ll be able to, unfortunately, make up for that with the influx of moisture and abundant shear.

Showers and perhaps a rumble of thunder (nothing severe) will increase by evening across central portions of the state, but it’s not until we get closer to midnight that stronger storms should get triggered. The focal point of this particular severe weather episode will fall within the 12a to 8a range. Initially, we believe there will be the opportunity of discrete super cells ahead of what should become a rather robust squall line that will move across the state (west to east) between 6a and 8a Saturday. The potential is present for all modes of severe weather, but given the dynamics in play, we’re most concerned for the potential of damaging straight line winds and tornadoes. It’ll be important to ensure you have a means of getting the latest warnings that will likely be issued tonight (be sure to set those weather radios alerts to “on”). Add in the fact that this event will take place when most people are sleeping, coupled with the likelihood of storms racing off to the east and northeast, it wouldn’t be a bad idea to give your neighbors and loved ones a friendly heads up of the developing weather situation later tonight so they, too, can prepare.

5p forecast radar: Rain will increase late afternoon and early evening with the potential of a rumble of thunder.
2a forecast radar: Individual super cells may try and develop shortly after midnight across the state. Damaging winds and the potential of quick spin-up tornadoes are possible.
7a forecast radar: A squall line will press across the state early Saturday morning with the threat of damaging winds and embedded rotating storms capable of tornadoes.

Confidence:High

Next Update: Friday afternoon- video

Permanent link to this article: https://indywx.com/2021/12/10/client-brief-severe-weather-event-overnight-predawn-saturday/

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