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12/14-12/16 Upper MW Powerhouse System


Tom

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* At 1152 AM CST, a wall of dust was along a line extending from 6
miles north of Ludell to 7 miles northwest of Dresden to 5 miles
north of Quinter, moving northeast at 65 mph.

HAZARD...Less than a quarter mile visibility with damaging wind in
excess of 70 mph.

SOURCE...Doppler radar.

IMPACT...Dangerous life-threatening travel.
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7 hours ago, Grizzcoat said:

Even if you didn't follow the weather at all, something about this sunrise that is a bad harbinger. 61F over 57F dew at 7am in mid Dec doesn't bode well either.

PXL_20211215_131533054~2.jpg

“Red sky at morning - sailor take warning.”

 
Always seems to be a harbinger to a bad day.  As a sailor, I found it pretty consistent.  
Be careful. 

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Before You Diagnose Yourself With Depression or Low Self-Esteem,...First Make Sure You Are Not In Fact, Just Surrounded By A$$holes.

“If I owned Texas and Hell, I would rent out Texas and live in Hell.”  Gen. Sheridan 1866

2018 Rainfall - 62.65" High Temp. - 110.03* Low Temp. - 8.4*

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93mph in Lincoln-

 

KLNK 152137Z 21032G81KT 1/2SM R36/2000VP6000FT +TSRA FG SQ SCT025 BKN070 OVC090 12/10 A2921 RMK AO2 PK WND 22081/2129 LTG DSNT ALQDS RAB27 TSB21 P0015 T01170100

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The two loudest sounds known to man: a gun that goes bang when it is supposed to go click and a gun that goes click when it is supposed to go bang.

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Squall line didn't really seem that bad in SE Lincoln, certainly not 93 mph gusts, maybe like 70. Either way, didn't think I'd be seeing a torrential rain/wind storm in December. 

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Snowfall in Lincoln, NE:

2017-18: 21.4"   2018-19: 55.5"   2019-20: 17.6"   2020-21: 49.4"   2021-22: 5.1" 🤮

Average: 26"

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Its long but if you have a couple mins check out Des Moines afternoon AFD. Crazy stuff.

Key Messages:

An unprecedented, historic event is just getting started across the
area today. There are several facets to this event including extreme
environmental winds, high end severe weather, and (of least
importance) record breaking heat.

Lee cyclogenesis has rapidly increased as the surface cyclone moves
out of Colorado and into Nebraska and Kansas this afternoon. Iowa
has remained within the warm sector today with temperature
soaring into the upper 60s to mid 70s across the area. This
shatters high temperature records for the day across most sites in
Iowa. Additionally, the all-time, statewide December record high
of 74 degrees in Thurman of 74 on Dec. 6, 1939 is broken
(preliminarily, this will need to be officially verified).
Dewpoints at 1pm were in the upper 50s and low 60s statewide.

Significant High Wind...

Warm air advection ongoing today has initially limited mixing
efficiency as was expected, as the lift from waa works in contrast
to deep mixing. Even still, winds by noon had started gusting 40-50+
mph across parts of southern into central Iowa. Convection has begun
across Kansas and Nebraska and is expected to swing across Iowa
between 22z and 02z. Thunderstorms will enhance background wind
gusts, but more on the convective component next. Hi-res models
continue to indicate a brief lull in gusts behind the line of
convection this evening, however this will only last an hour or so
before the synoptic winds ramp up with vigor. As the low pressure
center and associated dryline approaches the area the pressure
gradient will tighten significantly across the area. Strong cold air
advection and subsidence will pull the very strong winds just off
the surface down to the ground. It can be practically guaranteed
that everyone will see 60 mph gust this evening and many will see 70
mph. Strong decent on the back of the low resulting in a sting
jet setup mean that gusts of 80+ mph are possible in pockets
across the state. Gusty winds will begin to subside after
midnight. Widespread wind damage an power outages are a real
possibility.

Severe Thunderstorm Threat...

This is the first time that SPC has ever issued a Moderate risk for
severe storms in the state of Iowa in December, and even in the
typical convective season they are fairly uncommon). Thunderstorms
will enhance the background strong environmental winds as cold
pools drive gusts. Embedded gusts within severe thunderstorms will
easily exceed 80 mph and gusts over 100 mph are certainly
possible. Wind gusts are easily a concern with every storm that
develops. The other concern is the tornado threat. Parameters
within the CAMs include 0- 1km MLCAPE ~800 J/kg, 0-1km helicity
~300m2/s2, LCLs ~500m, Sig Tor Parameter ~1-2, and 0-1km lapse
rates 6-8 C/km, all contributing to a good tornadic environment.
As the previous discussion mentioned, storms will be moving very
fast (current storms in Kansas are moving at 70-80 mph) and
rotational winds within tornadic storms will be enhanced, easily
pushing strength to the significant tornado (EF2+) thresholds.
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1 hour ago, Bellona said:

Yeowza!!!

Screenshot_20211215-145532.png

Yep we through my area and multiple reports of spin ups. The main line had crazy rotation as it went over my area. My neighbors tree fell down on our power line and have been out of electricity since 3:00. Hard telling when they get back to fix it as my county has multiple lines down. 

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