Alert archive / Nebraska / Mesoscale Discussions in 2024
Mesoscale Discussion 621
The Storm Prediction Center issued this mesoscale discussion at May 3, 2024, 7:28 PM CDT for 5 counties in Kansas; 17 counties in Nebraska. It was in force for 92 min.
The area
The outline as issued.
The facts
- Issued
- May 3, 2024, 7:28 PM CDT (00:28 UTC)
- Expired
- May 3, 2024, 9:00 PM CDT
- In force
- 92 min
- Issued by
- the Storm Prediction Center
- Concerning
- Severe thunderstorm watch 181
All 22 counties
Jewell County, KS, Norton County, KS, Phillips County, KS, Republic County, KS, Smith County, KS, Adams County, NE, Clay County, NE, Dawson County, NE, Fillmore County, NE, Franklin County, NE, Frontier County, NE, Furnas County, NE, Gosper County, NE, Harlan County, NE, Hayes County, NE, Hitchcock County, NE, Kearney County, NE, Nuckolls County, NE, Phelps County, NE, Red Willow County, NE, Thayer County, NE, Webster County, NE
The radar
The Grand Island radar (KUEX), 71 km from the middle of the area, began a volume at 00:30 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 watches that followed
Watches SPC issued over any of the same counties within four hours of this discussion.
The nearest sounding before it
N. Platte/Lee Bi, NE (KLBF), launched 00:00Z, 0.5 hours before the alert went out and 148 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
- 311 J/kg
- Mixed-layer CIN
- -31 J/kg
- Mixed-layer LCL
- 2328 m above ground
- 0-6 km bulk shear
- 41 kt
- 0-1 km storm-relative helicity
- 100 m²/s²
- 0-3 km storm-relative helicity
- 306 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 2.9
The text
As transmitted.
485
ACUS11 KWNS 040029
SWOMCD
SPC MCD 040028
NEZ000-KSZ000-040200-
Mesoscale Discussion 0621
NWS Storm Prediction Center Norman OK
0728 PM CDT Fri May 03 2024
Areas affected...Parts of south-central Nebraska and north-central
Kansas
Concerning...Severe Thunderstorm Watch 181...
Valid 040028Z - 040200Z
The severe weather threat for Severe Thunderstorm Watch 181
continues.
SUMMARY...An organized line of storms could produce 60-75 mph gusts
as it moves south-southeast.
DISCUSSION...An organized line segment has developed in western
Nebraska and moved southeast along moisture gradient. Measured
winds of 61 and 63 mph were reported near North Platte. Recent
surface observations from Holdrege, NE showed the dewpoint jumping
from 51 to 55 F in the last hour. Other ASOS/KS Mesonet observations
show upper 50s to low 60s F dewpoints that may try and push
northwestward this evening. Given the organization of the line and
the theta-e gradient, this activity will likely continue for the
next few hours with aid from the low-level jet. The observed 00Z OAX
and TOP soundings showed capping/low-level drier air making the
eastward extent of this threat uncertain. Wind gusts of 60-75 mph
appear possible with this line of storms. Small to marginally severe
hail may also occur, but should be more isolated given the linear
mode.
..Wendt.. 05/04/2024
...Please see www.spc.noaa.gov for graphic product...
ATTN...WFO...OAX...TOP...GID...LBF...GLD...
LAT...LON 40320143 40890074 40950071 40859916 40689800 40489735
40249727 39939741 39559797 39509849 39679983 39900081
40320143SPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 3, 8:28 PM CDT | Mesoscale Discussion | SPC | Clark, Comanche, Edwards, Ellis, Finney, Ford and 17 more | 2 hr |
| May 3, 9:26 PM CDT | Mesoscale Discussion | SPC | Barber, Clay, Cloud, Dickinson, Ellsworth, Geary and 15 more | 2 hr |
| May 3, 9:47 PM CDT | Severe Thunderstorm Watch | SPC | Barton, Butler, Chase, Clay, Cloud, Cowley and 24 more | 6 hr |
| May 3, 11:01 PM CDT | Mesoscale Discussion | SPC | Republic | 59 min |
| May 3, 11:41 PM CDT | Mesoscale Discussion | SPC | Barber, Harper | 94 min |
| May 4, 1:02 AM CDT | Mesoscale Discussion | SPC | Atchison, Brown, Clay, Cloud, Doniphan, Jackson and 9 more | 118 min |
Nearby
Mesoscale Discussions in Nebraska, 2024Mesoscale Discussions in Kansas, 2024Every mesoscale discussion in 2024
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.