Alert archive / Kansas / Severe Thunderstorm Watches in 2021

Severe Thunderstorm Watch 126

May 2, 202140 counties in Kansas; 19 counties in Nebraska

The Storm Prediction Center issued this severe thunderstorm watch at May 2, 2021, 5:41 PM CDT for 40 counties in Kansas; 19 counties in Nebraska. It was in force for 6 hr.

The area

The outline as issued.

The facts

Issued
May 2, 2021, 5:41 PM CDT (22:41 UTC)
Expired
May 3, 2021, 12:00 AM CDT
In force
6 hr
Issued by
the Storm Prediction Center
Largest hail expected
1.5 in
Strongest gust expected
65 kt
All 59 counties

Barton County, KS, Cheyenne County, KS, Decatur 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, Hamilton County, KS, Haskell County, KS, Hodgeman County, KS, Jewell County, KS, Kearny County, KS, Lane County, KS, Lincoln County, KS, Logan County, KS, Mitchell County, KS, Ness County, KS, Norton County, KS, Osborne County, KS, Pawnee County, KS, Phillips County, KS, Rawlins County, KS, Rice County, KS, Rooks County, KS, Rush County, KS, Russell County, KS, Scott County, KS, Sheridan County, KS, Sherman County, KS, Smith County, KS, Stafford County, KS, Thomas County, KS, Trego County, KS, Wallace County, KS, Wichita County, KS, Adams County, NE, Clay County, NE, Dundy County, NE, Fillmore County, NE, Franklin County, NE, Furnas County, NE, Gosper County, NE, Hall County, NE, Hamilton County, NE, Harlan County, NE, Hitchcock County, NE, Kearney County, NE, Nuckolls County, NE, Phelps County, NE, Polk County, NE, Red Willow County, NE, Thayer County, NE, Webster County, NE, York County, NE

The radar

The Goodland radar (KGLD), 112 km from the middle of the area, began a volume at 22:40 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
2%
Ten or more severe wind reports
70%
One or more gusts of 65 knots or more
60%
Ten or more severe hail reports
40%
One or more hailstones of 2 inches or more
20%
Six or more combined severe hail and wind reports
90%

Warnings issued inside it

42 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
May 2, 5:41 PM CDTSevere Thunderstorm WarningGIDOsborne, Phillips, Rooks, Smith49 min
May 2, 6:03 PM CDTSevere Thunderstorm WarningGLDCheyenne, Rawlins72 min
May 2, 6:12 PM CDTSevere Thunderstorm WarningDDCHamilton, Stanton48 min
May 2, 6:14 PM CDTSevere Thunderstorm WarningGLDSherman, Thomas76 min
May 2, 6:29 PM CDTSevere Thunderstorm WarningGIDPhillips, Rooks46 min
May 2, 6:39 PM CDTFlash Flood WarningGLDHitchcock77 min
May 2, 6:44 PM CDTFlash Flood WarningGLDRawlins, Thomas93 min
May 2, 7:03 PM CDTSevere Thunderstorm WarningDDCHamilton, Kearny42 min
May 2, 7:04 PM CDTFlash Flood WarningGLDThomas78 min
May 2, 7:22 PM CDTSevere Thunderstorm WarningGLDLogan, Thomas, Wichita83 min
May 2, 7:33 PM CDTSevere Thunderstorm WarningGLDDecatur, Norton72 min
May 2, 7:35 PM CDTSevere Thunderstorm WarningGIDFurnas, Gosper, Harlan, Phelps40 min
May 2, 7:40 PM CDTSevere Thunderstorm WarningGIDAdams, Kearney35 min
May 2, 7:41 PM CDTSevere Thunderstorm WarningGLDRed Willow34 min
May 2, 7:43 PM CDTSevere Thunderstorm WarningDDCFinney, Kearny, Scott47 min
May 2, 7:43 PM CDTSevere Thunderstorm WarningGIDPolk32 min
May 2, 7:45 PM CDTSevere Thunderstorm WarningGLDGove, Sheridan90 min
May 2, 7:54 PM CDTSevere Thunderstorm WarningGLDGraham96 min
May 2, 7:57 PM CDTSevere Thunderstorm WarningGIDHamilton, York33 min
May 2, 8:08 PM CDTSevere Thunderstorm WarningDDCScott52 min
May 2, 8:10 PM CDTSevere Thunderstorm WarningGIDAdams, Kearney35 min
May 2, 8:12 PM CDTSevere Thunderstorm WarningGIDPolk, York33 min
May 2, 8:13 PM CDTSevere Thunderstorm WarningGIDPhillips, Rooks47 min
May 2, 8:16 PM CDTSevere Thunderstorm WarningDDCFinney, Gray, Haskell, Meade, Seward, Stevens44 min
May 2, 8:26 PM CDTSevere Thunderstorm WarningDDCFinney34 min
May 2, 8:39 PM CDTSevere Thunderstorm WarningDDCFinney, Lane51 min
May 2, 8:43 PM CDTSevere Thunderstorm WarningGLDNorton47 min
May 2, 8:43 PM CDTSevere Thunderstorm WarningGIDPolk, York32 min
May 2, 8:54 PM CDTSevere Thunderstorm WarningGIDOsborne, Phillips, Rooks, Smith51 min
May 2, 9:11 PM CDTFlash Flood WarningGIDAdams, Kearney, Phelps6 hr
May 2, 9:14 PM CDTSevere Thunderstorm WarningGLDGove46 min
May 2, 9:23 PM CDTSevere Thunderstorm WarningGLDGraham38 min
May 2, 9:36 PM CDTSevere Thunderstorm WarningDDCClark, Ford, Gray, Hodgeman, Meade39 min
May 2, 9:42 PM CDTSevere Thunderstorm WarningDDCEllis, Ness, Rush, Trego48 min
May 2, 9:45 PM CDTSevere Thunderstorm WarningGIDOsborne, Phillips, Rooks, Smith45 min
May 2, 10:01 PM CDTSevere Thunderstorm WarningICTBarton, Russell59 min
May 2, 10:12 PM CDTFlash Flood WarningGIDHamilton6 hr
May 2, 10:19 PM CDTSevere Thunderstorm WarningDDCEllis, Hodgeman, Ness, Pawnee, Rush41 min
May 2, 10:30 PM CDTSevere Thunderstorm WarningGIDJewell, Mitchell, Osborne, Smith45 min
May 2, 10:41 PM CDTSevere Thunderstorm WarningDDCEdwards, Kiowa, Pratt, Stafford49 min
May 2, 10:59 PM CDTSevere Thunderstorm WarningICTBarton, Ellsworth, Lincoln, Rice, Russell61 min
May 2, 11:15 PM CDTSevere Thunderstorm WarningDDCBarber, Pratt, Stafford45 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

Dodge City, (KDDC), launched 12:00Z, 10.7 hours before the alert went out and 179 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.

Skew-T log-pSkew-T log-p diagram, Dodge City, at 12:00Z on 2021-05-02Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Dodge City, at 12:00Z on 2021-05-02The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 199 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1 J/kg
Mixed-layer CIN
-668 J/kg
Mixed-layer LCL
1278 m above ground
0-6 km bulk shear
9 kt
0-1 km storm-relative helicity
199 m²/s²
0-3 km storm-relative helicity
207 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

765 
WWUS20 KWNS 022238
SEL6  
SPC WW 022238
KSZ000-NEZ000-030500-

URGENT - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Watch Number 126
NWS Storm Prediction Center Norman OK
540 PM CDT Sun May 2 2021

The NWS Storm Prediction Center has issued a

* Severe Thunderstorm Watch for portions of 
  Parts of western into central Kansas
  Southern Nebraska

* Effective this Sunday afternoon from 540 PM until Midnight CDT.

* Primary threats include...
  Scattered damaging winds and isolated significant gusts to 75
    mph likely
  Scattered large hail events to 1.5 inches in diameter possible

SUMMARY...Clusters of severe storms are expected to develop this
evening along a cold front, and as outflow surges eastward from
Colorado.  The predominant storm mode will be multicell clusters
with the potential for a swath of damaging outflow winds across
Kansas, with isolated significant gusts possible through late
evening.

The severe thunderstorm watch area is approximately along and 75
statute miles north and south of a line from 25 miles southwest of
Goodland KS to 50 miles east northeast of Russell 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 124...WW 125...

AVIATION...A few severe thunderstorms with hail surface and aloft to
1.5 inches. Extreme turbulence and surface wind gusts to 65 knots. A
few cumulonimbi with maximum tops to 500. Mean storm motion vector
27030.

...Thompson

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 2, 3:45 PM CDTMesoscale DiscussionSPCCheyenne, Decatur, Greeley, Logan, Rawlins, Sheridan and 4 more90 min
May 2, 5:26 PM CDTMesoscale DiscussionSPCBarton, Cheyenne, Decatur, Edwards, Ellis, Ellsworth and 32 more64 min

Nearby

Severe Thunderstorm Watches in Kansas, 2021Severe Thunderstorm Watches in Nebraska, 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.