Alert archive / Kansas / Severe Thunderstorm Watches in 2021
Severe Thunderstorm Watch 334
The Storm Prediction Center issued this severe thunderstorm watch at Jul 4, 2021, 4:01 PM CDT for 27 counties in Kansas. It was in force for 7 hr.
The area
The outline as issued.
The facts
- Issued
- Jul 4, 2021, 4:01 PM CDT (21:01 UTC)
- Expired
- Jul 4, 2021, 11:00 PM CDT
- In force
- 7 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 2 in
- Strongest gust expected
- 60 kt
All 27 counties
Clark County, KS, Finney County, KS, Ford County, KS, Gove County, KS, Graham County, KS, Grant County, KS, Gray County, KS, Greeley County, KS, Hamilton County, KS, Haskell County, KS, Hodgeman County, KS, Kearny County, KS, Lane County, KS, Logan County, KS, Meade County, KS, Morton County, KS, Ness County, KS, Scott County, KS, Seward County, KS, Sheridan County, KS, Sherman County, KS, Stanton County, KS, Stevens County, KS, Thomas County, KS, Trego County, KS, Wallace County, KS, Wichita County, KS
The radar
The Dodge City radar (KDDC), 108 km from the middle of the area, began a volume at 21:03 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
- 10%
- One or more EF2 to EF5 tornadoes
- 5%
- Ten or more severe wind reports
- 40%
- 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
- 80%
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 |
|---|---|---|---|---|
| Jul 4, 4:10 PM CDT | Severe Thunderstorm Warning | GLD | Gove, Graham, Sheridan | 35 min |
| Jul 4, 4:23 PM CDT | Severe Thunderstorm Warning | DDC | Finney, Gray | 52 min |
| Jul 4, 4:26 PM CDT | Severe Thunderstorm Warning | GLD | Decatur, Graham, Norton, Sheridan | 34 min |
| Jul 4, 4:39 PM CDT | Severe Thunderstorm Warning | GLD | Gove, Graham, Sheridan | 36 min |
| Jul 4, 4:57 PM CDT | Severe Thunderstorm Warning | DDC | Finney, Gray, Haskell | 48 min |
| Jul 4, 4:58 PM CDT | Flash Flood Warning | GLD | Gove, Graham, Sheridan | 2 hr |
| Jul 4, 4:58 PM CDT | Severe Thunderstorm Warning | GLD | Graham, Sheridan | 32 min |
| Jul 4, 5:12 PM CDT | Severe Thunderstorm Warning | DDC | Edwards, Hodgeman, Ness, Pawnee | 33 min |
| Jul 4, 5:15 PM CDT | Severe Thunderstorm Warning | GLD | Gove, Logan, Sheridan | 60 min |
| Jul 4, 5:37 PM CDT | Severe Thunderstorm Warning | DDC | Gray, Haskell, Meade, Seward | 38 min |
| Jul 4, 5:56 PM CDT | Severe Thunderstorm Warning | DDC | Lane, Scott | 49 min |
| Jul 4, 6:00 PM CDT | Severe Thunderstorm Warning | DDC | Morton, Stanton | 45 min |
| Jul 4, 6:28 PM CDT | Severe Thunderstorm Warning | DDC | Haskell, Seward | 47 min |
| Jul 4, 6:35 PM CDT | Severe Thunderstorm Warning | DDC | Scott | 40 min |
| Jul 4, 8:24 PM CDT | Severe Thunderstorm Warning | DDC | Morton | 26 min |
| Jul 4, 8:49 PM CDT | Severe Thunderstorm Warning | DDC | Hamilton, Kearny | 26 min |
| Jul 4, 9:05 PM CDT | Severe Thunderstorm Warning | GLD | Sherman | 55 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
Denver, CO (KDNR), launched 12:00Z, 9.0 hours before the alert went out and 262 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
- 204 J/kg
- Mixed-layer CIN
- -314 J/kg
- Mixed-layer LCL
- 2162 m above ground
- 0-6 km bulk shear
- 17 kt
- 0-1 km storm-relative helicity
- 35 m²/s²
- 0-3 km storm-relative helicity
- 80 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
395
WWUS20 KWNS 042100
SEL4
SPC WW 042100
COZ000-KSZ000-050400-
URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 334
NWS Storm Prediction Center Norman OK
400 PM CDT Sun Jul 4 2021
The NWS Storm Prediction Center has issued a
* Severe Thunderstorm Watch for portions of
Eastern Colorado
Western Kansas
* Effective this Sunday afternoon and evening from 400 PM until
1100 PM CDT.
* Primary threats include...
Scattered large hail and isolated very large hail events to 2
inches in diameter possible
Scattered damaging wind gusts to 70 mph possible
SUMMARY...Storms are expected to continue to develop and intensify
across west-central Kansas through late afternoon/early evening,
with subsequent development possible farther west across
west/southwest Kansas and possibly nearby eastern Colorado this
evening. Modest-strength winds and an unstable air mass will support
the potential for large hail and damaging winds.
The severe thunderstorm watch area is approximately along and 75
statute miles east and west of a line from 40 miles east northeast
of Goodland KS to 5 miles south southwest of Liberal KS. For a
complete depiction of the watch see the associated watch outline
update (WOUS64 KWNS WOU4).
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 333...
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 550. Mean storm motion vector
35015.
...GuyerSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 4, 3:16 PM CDT | Mesoscale Discussion | SPC | Finney, Ford, Gove, Grant, Gray, Haskell and 13 more | 89 min |
| Jul 4, 6:56 PM CDT | Mesoscale Discussion | SPC | Grant, Greeley, Hamilton, Haskell, Kearny, Logan and 8 more | 94 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.