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May 17-June 3, 2023 | Severe Weather


ElectricStorm

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  • The title was changed to May 17-June ?, 2023 | Severe Weather
  • Meteorologist

Already strongly unstable here but I'd imagine it will either decrease or plateau as mixing eats away at low-level moisture. Should end up with at least decent instability and all that mixing should make it easy to produce strong to severe gusts once convection gets going.

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Didn't take long to get back into daily severe thunderstorm chances

Day 2

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Day 2 Convective Outlook  
NWS Storm Prediction Center Norman OK
1225 PM CDT Tue May 30 2023

Valid 311200Z - 011200Z

...THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS ACROSS PARTS OF
EASTERN CO/NM...WESTERN KS...WEST TX...AND THE OK/TX
PANHANDLES......

...SUMMARY...
Strong to severe thunderstorms capable of large hail and strong
gusts are possible Wednesday afternoon and evening across the
central and southern High Plains vicinity.

...Synopsis...
An upper-level cyclone initially over southern CA is forecast to
move slowly eastward on Wednesday. Farther east, a weak
mid/upper-level trough will persist over the Gulf of Mexico, while
an upper ridge will remain over parts of the Northeast. A broad
surface cyclone will move little over the eastern Great Basin, while
a surface ridge remains in place over much of the eastern CONUS.
Some deepening of a lee cyclone is possible across the northern High
Plains Wednesday afternoon into Wednesday evening.

...Parts of the central/southern High Plains...
Another day of active convection is expected across parts of the
central/southern High Plains on Wednesday. The initial severe threat
may be focused somewhat farther west compared to D1/Tuesday, with
low-level southeasterly flow and the potential influence of outflow
from Tuesday convection helping to increase low-level moisture
closer to the higher terrain. Diurnal heating and embedded vorticity
maxima in advance of the upper cyclone over the Southwest will
support widely scattered afternoon thunderstorm development across
terrain-favored regions, and also potentially farther east into
parts of the TX/OK Panhandles and west TX.

Deep-layer flow will again be rather modest across the region, but
favorably veering wind profiles will support effective shear of
25-35 kt (slightly stronger with southward extent), sufficient for
some storm organization, including the potential for a few
supercells. Moderate to strong instability will support some hail
potential with the strongest semi-discrete storms. With time,
outflow mergers may result in an increasing threat for severe gusts,
especially if stronger heating and steepening of low-level lapse
rates can occur downstream of initial storm development during the
afternoon. A tornado or two cannot be ruled out, especially if any
supercells can persist into the evening, when some increase in
low-level shear/SRH is expected.  

Day 3

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Day 3 Convective Outlook  
NWS Storm Prediction Center Norman OK
0211 AM CDT Tue May 30 2023

Valid 011200Z - 021200Z

...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS ACROSS PORTIONS
OF THE SOUTHERN HIGH PLAINS...

...SUMMARY...
Isolated strong to severe thunderstorms producing hail and strong
gusts are possible across portions of the southern High Plains on
Thursday afternoon and evening.

...Southern High Plains vicinity...

A series of vorticity maxima will migrate across the southern High
Plains amid 40-50 kt southwesterly flow in the midlevels. An upper
closed low and attendant shortwave trough over the Four Corners
vicinity will weaken through the period before another shortwave
trough develops east across northwest Mexico after 00z. Large-scale
ascent may be somewhat muted compared to Days 1-2/Tue-Wed as the
region sits between the influence of the departing and weakening
system from the Day 2 period, and the shortwave trough over
northwest Mexico. However, 4-6 km flow will be stronger, resulting
in more favorable vertical shear, with effective shear magnitudes
greater than 40 kt forecast. 

Mid 50s to low 60s F boundary-layer dewpoints beneath steep midlevel
lapse rates will support 1500-2000 J/kg MLCAPE. Generally, this
thermodynamic and kinematic parameter space would support severe
storms. However, concerns over potential morning convection/cloud
cover, and weak forcing for ascent limiting storm coverage, preclude
higher severe probabilities at this time. While the extent of severe
potential is somewhat conditional, it seems reasonable that at least
a few strong to severe storms capable of large hail and damaging
gusts will be possible, warranting a Marginal risk (level 1 of 5).

 

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Confirmed tornado NE of Lamar CO.

Quote
Severe Weather Statement
National Weather Service Pueblo CO
406 PM MDT Tue May 30 2023

COC099-302215-
/O.CON.KPUB.TO.W.0010.000000T0000Z-230530T2215Z/
Prowers CO-
406 PM MDT Tue May 30 2023

...A TORNADO WARNING REMAINS IN EFFECT UNTIL 415 PM MDT FOR
NORTHWESTERN PROWERS COUNTY...

At 406 PM MDT, a confirmed tornado was located 7 miles northeast of
Lamar, moving northeast at 15 mph.

HAZARD...TORNADO and quarter size hail.

SOURCE...Law enforcement confirmed tornado.

IMPACT...Expect damage to mobile homes, roofs, and vehicles.

This tornadic thunderstorm will remain over mainly rural areas of
northwestern Prowers County.

 

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New tornado warning still confirmed.

Quote
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Pueblo CO
412 PM MDT Tue May 30 2023

The National Weather Service in Pueblo has issued a

* Tornado Warning for...
  Northwestern Prowers County in southeastern Colorado...
  Southeastern Kiowa County in southeastern Colorado...

* Until 445 PM MDT.

* At 412 PM MDT, a confirmed tornado was located 9 miles southeast of
  Queens Reservoir, or 10 miles northeast of Lamar, moving north at
  20 mph.

  HAZARD...Tornado and quarter size hail.

  SOURCE...Law enforcement confirmed tornado.

  IMPACT...Expect damage to mobile homes, roofs, and vehicles.

* Locations impacted include...
  Chivington.

 

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This evening, there have been yet more isolated storms in Colorado, and again near Denver. Also, a storm near Tucumcari, NM. That's like 5 severe storms in the past week or two for just Tucumcari. The cap broke near Goodland KS and the storms have been mainly disorganized. They are not exactly as the short term models predicted a few hours before (as in, the 18z HRRR). It's a little interesting, but yet so sad to the see the blocking pattern has reduced the shear and also reduced rainfall to non-existence in the Great Lakes.

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  • Meteorologist
6 hours ago, Chinook said:

This evening, there have been yet more isolated storms in Colorado, and again near Denver. Also, a storm near Tucumcari, NM. That's like 5 severe storms in the past week or two for just Tucumcari. The cap broke near Goodland KS and the storms have been mainly disorganized. They are not exactly as the short term models predicted a few hours before (as in, the 18z HRRR). It's a little interesting, but yet so sad to the see the blocking pattern has reduced the shear and also reduced rainfall to non-existence in the Great Lakes.

And then we walk in and Michael has his line that...

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  • Meteorologist

Moderate risk for excessive rainfall today for the western half of the Texas panhandle. Not ideal with the recent Hereford flood and ongoing Canadian River flooding. Not to mention 15% hatched wind today.

 

Edited by ClicheVortex2014
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18z HRRR initializes well but then you get to hour 1 and dew points unrealistically drop off across region. 

In reality... dew points in the slight risk area from 18z to 19z have either not changed or increased by 1-3 degrees. That means HRRR's dew points are 2-5 degrees too low by hour 1. That could be a big deal for instability

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Edited by ClicheVortex2014
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Yes there were 5 different days in which severe storms were close to Tucumcari. This is the rest of the reports from ABQ AMA LUB MAF EPZ in the last 8 days since May 23. 

Note: Lubbock TX had 5.29" of precipitation from May 1st-30th.

 

storm reports.jpg

Edited by Chinook
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268 days since any tornado warning near Cleveland.  This would mean the last tornado warning was on approximately September 5th, depending on exactly how this counts the days.

phenomena_TO__significance_W__e_all___r_t__dpi_100.png

Edited by Chinook
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Second half of May has been a snooze-fest here in terms of severe weather. Had some nice non-severe storms a couple days ago but that's about it. Haven't even had a marginal since May 13. For Oklahoma, so far we are sitting at just 10 tornadoes for the month of May, which is the lowest since 2014 which only had 4 (2014 as a whole was one of the least active tornado years ever for Oklahoma). All but one of the tornadoes this month were from the May 11 event, with the other one on May 12. Interestingly enough, February produced more tornadoes this year in Oklahoma than May did, which is wild. Overall we're sitting at 48 tornadoes for 2023 so far through May, which is the most at this point in the year since 2019. 

For me personally, the May 11 event was super intense, and we had a few other days with good but non-severe storms, but overall this was another below average May here, but certainly not the worst. 

Now it's time to shift into summer MCS/pop-up season, hopefully all the action out west can shift east soon. Could have some pop-ups tomorrow but Friday night looks more promising. 

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Amarillo to Canyon (south of Amarillo) got slammed with rain tonight. I never saw street/ditch/open field flooding like this in Ohio. Will be interested to see the pictures of flooding once the sun rises. Seems like moderate to heavy rain and lightning accounted for 7 of the past 8 hours.

There was probably a wet microburst over the Umbarger mesonet. It picked up almost 0.9" in 7 minutes as well as a severe wind gust. Imagine rain like that...

Edited by ClicheVortex2014
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Not gonna take much to break the cap today

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Very aggressive 850mb moisture surge able to be seen on satellite in SW TX. Gravity waves across the area... maybe mountain forced? And looks like there are some undular bores or gravity waves in the TX Panhandle rooted in the near-surface saturated layer (see above sounding).

 

Spoiler

CODNEXLAB-GOES-East-subregional-S_PanHandle-truecolor-13_21Z-20230602_map_noBar-24-1n-5-100.gif

Closer look

 

Spoiler

CODNEXLAB-GOES-East-local-Panhandle-truecolor-14_06Z-20230602_cwa-map_noBar-24-1n-5-100.thumb.gif.9c4d6e584abd61e4da64dba3c7ef8e1f.gif

 

Edited by ClicheVortex2014
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