Alert archive / Kansas / Mesoscale Discussions in 2021
Mesoscale Discussion 1107
The Storm Prediction Center issued this mesoscale discussion at Jun 25, 2021, 11:42 PM CDT for 11 counties in Kansas; 5 counties in Oklahoma. It was in force for 63 min.
The area
The outline as issued.
The facts
- Issued
- Jun 25, 2021, 11:42 PM CDT (04:42 UTC)
- Expired
- Jun 26, 2021, 12:45 AM CDT
- In force
- 63 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe potential...watch unlikely
- Chance of a watch
- 20%
Counties Allen County, KS, Bourbon County, KS, Chautauqua County, KS, Cherokee County, KS, Crawford County, KS, Elk County, KS, Labette County, KS, Montgomery County, KS, Neosho County, KS, Wilson County, KS, Woodson County, KS, Craig County, OK, Nowata County, OK, Osage County, OK, Ottawa County, OK, Washington County, OK
The radar
The Tulsa radar (KINX), 118 km from the middle of the area, began a volume at 04:44 UTC, the scan nearest the moment this went out.
Open the radar archive at this moment
The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.
The nearest sounding before it
Springfield, MO (KSGF), launched 00:00Z, 4.7 hours before the alert went out and 173 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 1507 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 1381 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 31 m²/s²
- 0-3 km storm-relative helicity
- 110 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 2.0
The text
As transmitted.
861
ACUS11 KWNS 260443
SWOMCD
SPC MCD 260442
MOZ000-OKZ000-KSZ000-260545-
Mesoscale Discussion 1107
NWS Storm Prediction Center Norman OK
1142 PM CDT Fri Jun 25 2021
Areas affected...Southeast KS...northeast OK
Concerning...Severe potential...Watch unlikely
Valid 260442Z - 260545Z
Probability of Watch Issuance...20 percent
SUMMARY...An isolated severe wind and a brief tornado threat may
persist through about 07Z across mainly southeast KS into a portion
of northeast OK.
DISCUSSION...A storm cluster intensified over south-central KS, to
the south of an MCV in central KS, as outflow from a largely
decaying cluster in north-central OK merged with the remnant outflow
from the decaying MCS that was in southeast OK and southwest MO.
Organization of the cluster with a couple of brief mesovorticities
were noted earlier near Wichita. Potential will exist for transient
mesovorticities capable of producing severe wind gusts and a brief
tornado given a rather enlarged low-level hodograph amid 40-kt 1 km
AGL southwesterlies sampled by the INX VWP atop the remnant outflow
boundary. Overnight, stronger low-level flow will be increasingly
focused across the southern High Plains (reference MCD 1106), and
strengthening MLCIN across much of OK both suggest that the overall
severe threat will remain temporally and spatially limited farther
northeast.
..Grams.. 06/26/2021
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...SGF...EAX...TSA...TOP...ICT...OUN...
LAT...LON 37779656 38109526 37949455 37179451 36869467 36639505
36539579 36509654 36899676 37369657 37779656SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 25, 8:26 PM CDT | Mesoscale Discussion | SPC | Allen, Anderson, Bourbon, Butler, Chase, Coffey and 16 more | 64 min |
| Jun 25, 8:49 PM CDT | Mesoscale Discussion | SPC | Beckham, Blaine, Custer, Dewey, Greer, Harmon and 3 more | 86 min |
| Jun 25, 11:36 PM CDT | Mesoscale Discussion | SPC | Ellis, Roger Mills | 84 min |
| Jun 25, 11:59 PM CDT | Severe Thunderstorm Watch | SPC | Beckham, Blaine, Caddo, Canadian, Cleveland, Custer and 11 more | 5 hr |
| Jun 26, 1:53 AM CDT | Mesoscale Discussion | SPC | Blaine, Caddo, Canadian, Comanche, Custer, Grady and 7 more | 67 min |
| Jun 26, 12:59 PM CDT | Mesoscale Discussion | SPC | Caddo, Canadian, Cleveland, Comanche, Cotton, Garvin and 12 more | 2 hr |
| Jun 26, 3:27 PM CDT | Mesoscale Discussion | SPC | Harmon | 2 hr |
| Jun 26, 3:48 PM CDT | Severe Thunderstorm Watch | SPC | Caddo, Carter, Comanche, Cotton, Garvin, Grady and 10 more | 9 hr |
| Jun 26, 6:27 PM CDT | Mesoscale Discussion | SPC | Comanche, Cotton, Grady, Jackson, Jefferson, McClain and 2 more | 93 min |
Nearby
Mesoscale Discussions in Kansas, 2021Mesoscale Discussions in Oklahoma, 2021Every mesoscale discussion in 2021
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.