Alert archive / Kansas / Severe Thunderstorm Warnings in 2018

Severe Thunderstorm Warning 21, NWS Topeka, KS

May 1, 2018Marshall County, Washington County, Kansas

NWS Topeka, KS issued this severe thunderstorm warning at May 1, 2018, 6:59 PM CDT for Marshall County, Washington County, Kansas. It was in force for 13 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: May 1, 2018, 6:59 PM CDT (23:59 UTC)
Expired: May 1, 2018, 7:12 PM CDT
In force: 13 min
Issued by: NWS Topeka, KS
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Marshall County, KS, Washington County, KS

The radar

The Topeka radar (KTWX), 118 km from the middle of the area, began a volume at 00:01 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 watch it was issued in

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

Issued	Product	Office	Lasted
May 1, 2:47 PM CDT	Tornado Watch	SPC	9 hr

The nearest sounding before it

Topeka, KS (KFOE), launched 12:00Z, 12.0 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.

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: 9 J/kg
Mixed-layer CIN: -558 J/kg
Mixed-layer LCL: 1172 m above ground
0-6 km bulk shear: 23 kt
0-1 km storm-relative helicity: 215 m²/s²
0-3 km storm-relative helicity: 193 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

292 
WUUS53 KTOP 012359
SVRTOP
KSC117-201-020045-
/O.NEW.KTOP.SV.W.0021.180501T2359Z-180502T0045Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Topeka KS
659 PM CDT TUE MAY 1 2018

The National Weather Service in Topeka has issued a

* Severe Thunderstorm Warning for...
  Northeastern Washington County in north central Kansas...
  Northwestern Marshall County in northeastern Kansas...

* Until 745 PM CDT

* At 659 PM CDT, severe thunderstorms were located along a line
  extending from near Hollenberg to 6 miles north of Washington,
  moving east at 30 mph.

  HAZARD...60 mph wind gusts. 

  SOURCE...Radar indicated. 

  IMPACT...Expect damage to roofs, siding, and trees. 

* These severe thunderstorms will remain over mainly rural areas of 
  northeastern Washington and northwestern Marshall Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

A tornado watch remains in effect until 1000 PM CDT for north central
and northeastern Kansas.

LAT...LON 3992 9671 3991 9707 4000 9703 4000 9672
TIME...MOT...LOC 2359Z 268DEG 24KT 4001 9702 3991 9706 

HAIL...<.75IN
WIND...60MPH
 
$$

Skow

1 follow-up statement

869 
WWUS53 KTOP 020012
SVSTOP

Severe Weather Statement
National Weather Service Topeka KS
712 PM CDT TUE MAY 1 2018

KSC117-201-020021-
/O.CAN.KTOP.SV.W.0021.000000T0000Z-180502T0045Z/
Washington-Marshall-
712 PM CDT TUE MAY 1 2018

...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN WASHINGTON AND
NORTHWESTERN MARSHALL COUNTIES IS CANCELLED...
    
The storms which prompted the warning have moved out of the area.
Therefore the warning has been cancelled.  However gusty winds are
still possible with these thunderstorms.

A tornado watch remains in effect until 1000 PM CDT for north central
and northeastern Kansas.

LAT...LON 3992 9671 3991 9707 4000 9703 4000 9672
TIME...MOT...LOC 0009Z 268DEG 24KT 4001 9693 3991 9697 

$$

Skow

The office that day

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

Issued	Product	Office	Counties	Lasted
May 1, 6:28 AM CDT	Special Weather Statement	TOP	Douglas	32 min
May 1, 5:04 PM CDT	Severe Thunderstorm Warning	TOP	Republic	41 min
May 1, 5:43 PM CDT	Severe Thunderstorm Warning	TOP	Republic	47 min
May 1, 5:58 PM CDT	Tornado Warning Tornado observed	TOP	Republic	17 min
May 1, 6:00 PM CDT	Severe Thunderstorm Warning	TOP	Cloud, Ottawa	45 min
May 1, 6:08 PM CDT	Severe Thunderstorm Warning	TOP	Republic, Washington	52 min
May 1, 6:10 PM CDT	Tornado Warning Tornado observed	TOP	Cloud, Ottawa	50 min
May 1, 6:53 PM CDT	Tornado Warning	TOP	Cloud	37 min

Nearby

Severe Thunderstorm Warnings in Kansas, 2018 Every severe thunderstorm warning in 2018

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.