Alert archive / Kansas / Severe Thunderstorm Watches in 2021
Severe Thunderstorm Watch 176
The Storm Prediction Center issued this severe thunderstorm watch at May 15, 2021, 6:53 PM CDT for 43 counties in Kansas. It was in force for 6 hr.
The area
The outline as issued.
The facts
- Issued
- May 15, 2021, 6:53 PM CDT (23:53 UTC)
- Expired
- May 16, 2021, 1:00 AM CDT
- In force
- 6 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 43 counties
Barber County, KS, Barton County, KS, Clark County, KS, Comanche County, KS, Edwards County, KS, Ellis County, KS, Ellsworth County, KS, Finney County, KS, Ford County, KS, Gove County, KS, Graham County, KS, Gray County, KS, Greeley County, KS, Harper County, KS, Harvey County, KS, Haskell County, KS, Hodgeman County, KS, Kingman County, KS, Kiowa County, KS, Lane County, KS, Lincoln County, KS, Logan County, KS, McPherson County, KS, Meade County, KS, Ness County, KS, Pawnee County, KS, Pratt County, KS, Reno County, KS, Rice County, KS, Rush County, KS, Russell County, KS, Saline County, KS, Scott County, KS, Sedgwick County, KS, Seward County, KS, Sheridan County, KS, Sherman County, KS, Stafford County, KS, Sumner County, KS, Thomas County, KS, Trego County, KS, Wallace County, KS, Wichita County, KS
The radar
The Dodge City radar (KDDC), 66 km from the middle of the area, began a volume at 23:55 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.
What SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 20%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 30%
- One or more gusts of 65 knots or more
- 20%
- Ten or more severe hail reports
- 50%
- One or more hailstones of 2 inches or more
- 40%
- Six or more combined severe hail and wind reports
- 70%
Warnings issued inside it
17 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 15, 8:56 PM CDT | Severe Thunderstorm Warning | GLD | Greeley | 34 min |
| May 15, 9:09 PM CDT | Severe Thunderstorm Warning | GLD | Wichita | 36 min |
| May 15, 9:26 PM CDT | Flash Flood Warning | GLD | Greeley | 4 hr |
| May 15, 9:31 PM CDT | Severe Thunderstorm Warning | GLD | Greeley | 44 min |
| May 15, 9:34 PM CDT | Flash Flood Warning | GLD | Wichita | 4 hr |
| May 15, 9:45 PM CDT | Severe Thunderstorm Warning | GLD | Logan, Wallace | 45 min |
| May 15, 10:11 PM CDT | Severe Thunderstorm Warning | DDC | Gray | 23 min |
| May 15, 10:21 PM CDT | Severe Thunderstorm Warning | GLD | Gove | 39 min |
| May 15, 10:25 PM CDT | Flash Flood Warning | GLD | Logan | 3 hr |
| May 15, 10:26 PM CDT | Severe Thunderstorm Warning | DDC | Lane, Scott | 49 min |
| May 15, 10:53 PM CDT | Flash Flood Warning | GLD | Gove | 3 hr |
| May 15, 11:03 PM CDT | Severe Thunderstorm Warning | GLD | Gove, Logan | 42 min |
| May 15, 11:05 PM CDT | Severe Thunderstorm Warning | DDC | Stafford | 18 min |
| May 15, 11:29 PM CDT | Flash Flood Warning | GLD | Wichita | 2 hr |
| May 15, 11:37 PM CDT | Severe Thunderstorm Warning | GLD | Sheridan | 15 min |
| May 16, 12:14 AM CDT | Severe Thunderstorm Warning | ICT | Harvey, Sedgwick | 61 min |
| May 16, 12:58 AM CDT | Severe Thunderstorm Warning | ICT | Harvey, McPherson, Marion | 22 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
The nearest sounding before it
N. Platte/Lee Bi, NE (KLBF), launched 12:00Z, 11.9 hours before the alert went out and 313 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
- 1278 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- -53 m²/s²
- 0-3 km storm-relative helicity
- 94 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
250
WWUS20 KWNS 152351
SEL6
SPC WW 152351
KSZ000-160600-
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 176
NWS Storm Prediction Center Norman OK
655 PM CDT Sat May 15 2021
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Western and central Kansas
* Effective this Saturday night and Sunday morning from 655 PM
until 100 AM CDT.
* Primary threats include...
Scattered large hail and isolated very large hail events to 2
inches in diameter possible
Isolated damaging wind gusts to 70 mph possible
A tornado or two possible
SUMMARY...Several cells should develop in a largely
west/east-oriented band this evening before consolidating into
multiple slow-moving clusters. Large hail will be the primary threat
with initial development.
The severe thunderstorm watch area is approximately along and 65
statute miles north and south of a line from 65 miles west northwest
of Garden City KS to 20 miles east southeast of Hutchinson KS. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU6).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REMEMBER...A Severe Thunderstorm Watch means conditions are
favorable for severe thunderstorms in and close to the watch area.
Persons in these areas should be on the lookout for threatening
weather conditions and listen for later statements and possible
warnings. Severe thunderstorms can and occasionally do produce
tornadoes.
&&
OTHER WATCH INFORMATION...CONTINUE...WW 172...WW 173...WW
174...WW 175...
AVIATION...A few severe thunderstorms with hail surface and aloft to
2 inches. Extreme turbulence and surface wind gusts to 60 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
26025.
...GramsSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 14, 7:10 PM CDT | Mesoscale Discussion | SPC | Ellis, Gove, Graham, Lane, Logan, Ness and 5 more | 2 hr |
| May 14, 7:27 PM CDT | Severe Thunderstorm Watch | SPC | Barber, Barton, Comanche, Edwards, Ellis, Ellsworth and 16 more | 5 hr |
| May 14, 9:42 PM CDT | Mesoscale Discussion | SPC | Edwards, Hodgeman, Ness, Pawnee | 63 min |
| May 15, 6:07 PM CDT | Tornado Watch | SPC | Grant, Hamilton, Kearny, Morton, Stanton, Stevens | 5 hr |
| May 15, 6:17 PM CDT | Mesoscale Discussion | SPC | Grant, Hamilton, Stanton | 58 min |
| May 15, 6:44 PM CDT | Mesoscale Discussion | SPC | Chautauqua, Cowley, Edwards, Ford, Hodgeman, Kingman and 7 more | 61 min |
Nearby
Severe Thunderstorm Watches in Kansas, 2021Every severe thunderstorm watch 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.