Alert archive / Kansas / Mesoscale Discussions in 2021
Mesoscale Discussion 25
The Storm Prediction Center issued this mesoscale discussion at Jan 24, 2021, 11:42 PM CST for 11 counties in Kansas. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Jan 24, 2021, 11:42 PM CST (05:42 UTC)
- Expired
- Jan 25, 2021, 4:15 AM CST
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Concerning
- Freezing rain
Counties Barton County, KS, Clark County, KS, Edwards County, KS, Ellsworth County, KS, Ford County, KS, Hodgeman County, KS, Meade County, KS, Pawnee County, KS, Rush County, KS, Russell County, KS, Seward County, KS
The radar
The Dodge City radar (KDDC), 63 km from the middle of the area, began a volume at 05:42 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
Dodge City, (KDDC), launched 00:00Z, 5.7 hours before the alert went out and 57 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 963 m above ground
- 0-6 km bulk shear
- 93 kt
- 0-1 km storm-relative helicity
- 377 m²/s²
- 0-3 km storm-relative helicity
- 464 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
293
ACUS11 KWNS 250542
SWOMCD
SPC MCD 250542
KSZ000-OKZ000-251015-
Mesoscale Discussion 0025
NWS Storm Prediction Center Norman OK
1142 PM CST Sun Jan 24 2021
Areas affected...Southwest into central KS
Concerning...Freezing rain
Valid 250542Z - 251015Z
SUMMARY...Freezing rain will be possible for the next several hours
across southwest into central KS, with hourly accumulations
exceeding 0.05" possible.
DISCUSSION...Surface temperatures are sub-freezing from the OK
Panhandle northeastward into central KS, well to the northwest of a
quasi-stationary front closer to the I-44 corridor. An expansive
precipitation shield, driven largely by warm advection, as been
expanding northward/northeastward into southwest KS, and this will
continue for the next several hours. The 00z Dodge City and
Amarillo soundings revealed a pronounced warm nose in the 850-700 mb
layer, which will help keep the precipitation type as freezing rain
for the next several hours along the northwest periphery of the
large precipitation shield. Rainfall rates could exceed 0.05"/hour,
which suggests that ice accumulations are probable.
The surface freezing line should move little the next few hours,
which will maintain the freezing rain threat in a narrow corridor.
Toward sunrise, the column will cool sufficiently for a changeover
to snow, as the primary shortwave trough ejects northeastward from
NM.
..Thompson.. 01/25/2021
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...ICT...OUN...DDC...AMA...
LAT...LON 38489829 38109868 37639924 37099978 36870016 36830063
36940095 37290086 37990020 38619950 38989895 39109833
38939804 38769801 38489829SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jan 25, 4:58 AM CST | Mesoscale Discussion | SPC | Barton, Clay, Cloud, Ellis, Ellsworth, Finney and 28 more | 6 hr |
| Jan 25, 10:41 AM CST | Mesoscale Discussion | SPC | Brown, Clay, Cloud, Doniphan, Jewell, Marshall and 9 more | 6 hr |
Nearby
Mesoscale Discussions in Kansas, 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.