Alert archive / Kansas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 18, NWS Topeka, KS

May 8, 2021Marshall County, Kansas

NWS Topeka, KS issued this severe thunderstorm warning at May 8, 2021, 8:03 PM CDT for Marshall County, Kansas. It was in force for 42 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: May 8, 2021, 8:03 PM CDT (01:03 UTC)
Expired: May 8, 2021, 8:45 PM CDT
In force: 42 min
Issued by: NWS Topeka, KS
Area: Storm-based polygon
Hail: 1.0 in
Wind: 50.0 mph

County Marshall County, KS

The radar

The Topeka radar (KTWX), 100 km from the middle of the area, began a volume at 01:04 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 was reported inside it

Time	Report	Where	Remark
May 8, 8:20 PM CDT	HAIL 1	5 S Marysville, KS

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The watch it was issued in

The SPC watch in force over the same counties when this warning went out.

Issued	Product	Office	Lasted
May 8, 6:42 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

Topeka, KS (KTOP), launched 00:00Z, 1.1 hours before the alert went out and 123 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 377 J/kg
Mixed-layer CIN: -170 J/kg
Mixed-layer LCL: 1653 m above ground
0-6 km bulk shear: 39 kt
0-1 km storm-relative helicity: 106 m²/s²
0-3 km storm-relative helicity: 362 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 6.0

Open this sounding in Storm Lab

The text

As transmitted.

505 
WUUS53 KTOP 090103
SVRTOP
KSC117-090145-
/O.NEW.KTOP.SV.W.0018.210509T0103Z-210509T0145Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Topeka KS
803 PM CDT Sat May 8 2021

The National Weather Service in Topeka has issued a

* Severe Thunderstorm Warning for...
  Western Marshall County in northeastern Kansas...

* Until 845 PM CDT.

* At 803 PM CDT, a severe thunderstorm was located near Waterville,
  moving northeast at 35 mph.

  HAZARD...Quarter size hail.

  SOURCE...Radar indicated.

  IMPACT...Damage to vehicles is expected.

* Locations impacted include...
  Marysville, Blue Rapids, Waterville, Summerfield and Oketo. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4000 9629 3963 9666 3968 9680 4000 9668
TIME...MOT...LOC 0103Z 209DEG 30KT 3971 9671 

HAIL...1.00IN
WIND...<50MPH
 
$$

Skow

1 follow-up statement

949 
WWUS53 KTOP 090120
SVSTOP

Severe Weather Statement
National Weather Service Topeka KS
820 PM CDT Sat May 8 2021

KSC117-090145-
/O.CON.KTOP.SV.W.0018.000000T0000Z-210509T0145Z/
Marshall-
820 PM CDT Sat May 8 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 845 PM CDT
FOR NORTHWESTERN MARSHALL COUNTY...

At 820 PM CDT, a severe thunderstorm was located over Marysville,
moving northeast at 35 mph.

HAZARD...Quarter size hail.

SOURCE...Emergency management. At 8:18pm, quarter sized hail was 
         reported south of Marysville.

IMPACT...Damage to vehicles is expected.

Locations impacted include...
Marysville, Summerfield and Oketo. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

For your protection move to an interior room on the lowest floor of a
building.

&&

LAT...LON 4000 9629 3970 9661 3974 9675 4000 9664
TIME...MOT...LOC 0120Z 209DEG 30KT 3984 9662 

HAIL...1.00IN
WIND...<50MPH
 
$$

Skow

The office that day

Everything else NWS Topeka, KS issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
May 8, 7:15 PM CDT	Special Weather Statement	TOP	Republic	15 min
May 8, 7:27 PM CDT	Severe Thunderstorm Warning	TOP	Republic	33 min
May 8, 7:52 PM CDT	Special Weather Statement	TOP	Marshall	23 min
May 8, 7:56 PM CDT	Severe Thunderstorm Warning	TOP	Republic, Washington	49 min
May 8, 8:38 PM CDT	Severe Thunderstorm Warning	TOP	Marshall, Washington	52 min
May 8, 8:48 PM CDT	Severe Thunderstorm Warning	TOP	Dickinson	57 min
May 8, 9:24 PM CDT	Severe Thunderstorm Warning	TOP	Geary, Morris, Riley	51 min
May 8, 9:27 PM CDT	Special Weather Statement	TOP	Marshall	33 min
May 8, 9:51 PM CDT	Severe Thunderstorm Warning	TOP	Geary, Pottawatomie, Riley	24 min
May 8, 10:03 PM CDT	Severe Thunderstorm Warning	TOP	Geary, Jackson, Morris, Pottawatomie, Riley, Shawnee and 1 more	42 min
May 8, 10:11 PM CDT	Tornado Warning	TOP	Pottawatomie, Riley, Wabaunsee	21 min
May 8, 10:43 PM CDT	Severe Thunderstorm Warning	TOP	Lyon, Osage, Shawnee, Wabaunsee	47 min
May 8, 11:00 PM CDT	Severe Thunderstorm Warning	TOP	Jackson, Jefferson, Shawnee	45 min
May 8, 11:00 PM CDT	Severe Thunderstorm Warning	TOP	Dickinson	45 min
May 8, 11:26 PM CDT	Special Weather Statement	TOP	Douglas	49 min
May 8, 11:42 PM CDT	Areal Flood Advisory	TOP	Shawnee, Wabaunsee	3 hr
May 9, 12:00 AM CDT	Areal Flood Advisory	TOP	Dickinson, Geary	3 hr
May 9, 12:00 AM CDT	Special Weather Statement	TOP	Dickinson	45 min
May 9, 12:15 AM CDT	Flash Flood Warning	TOP	Shawnee, Wabaunsee	4 hr
May 9, 12:31 AM CDT	Areal Flood Advisory	TOP	Douglas	3 hr
May 9, 12:58 AM CDT	Special Weather Statement	TOP	Morris	47 min
May 9, 2:28 AM CDT	Special Weather Statement	TOP	Coffey	32 min
May 9, 3:56 AM CDT	Special Weather Statement	TOP	Douglas, Jackson, Jefferson, Shawnee	49 min

Nearby

Severe Thunderstorm Warnings in Kansas, 2021 Every severe thunderstorm warning 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.