Alert archive / Kansas / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 21, NWS Topeka, KS

April 15, 2017Marshall County, Riley County, Washington County, Kansas

NWS Topeka, KS issued this severe thunderstorm warning at Apr 15, 2017, 7:11 PM CDT for Marshall County, Riley County, Washington County, Kansas. It was in force for 49 min. 6 reports 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
Apr 15, 2017, 7:11 PM CDT (00:11 UTC)
Expired
Apr 15, 2017, 8:00 PM CDT
In force
49 min
Issued by
NWS Topeka, KS
Area
Storm-based polygon
Hail
1.5 in
Wind
50.0 mph

Counties Marshall County, KS, Riley County, KS, Washington County, KS

The radar

The Topeka radar (KTWX), 75 km from the middle of the area, began a volume at 00:14 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

TimeReportWhereRemark
Apr 15, 7:14 PM CDTHAIL 1.758 Nw Randolph, KS
Apr 15, 7:24 PM CDTHAIL 17 Nnw Randolph, KS
Apr 15, 7:53 PM CDTHAIL 17 Nnw Randolph, KS
Apr 15, 7:58 PM CDTHAIL 16 N Randolph, KSHAIL WAS COVERING THE GROUND.
Apr 15, 8:00 PM CDTHAIL 1.255 Nnw Randolph, KS
Apr 15, 8:10 PM CDTHAIL 2.55 N Randolph, 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.

IssuedProductOfficeLasted
Apr 15, 5:05 PM CDTSevere Thunderstorm WatchSPC7 hr

The nearest sounding before it

Topeka, KS (KFOE), launched 00:00Z, 0.2 hours before the alert went out and 111 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, Topeka, KS at 00:00Z on 2017-04-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1238 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, Topeka, KS at 00:00Z on 2017-04-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 85 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
1238 J/kg
Mixed-layer CIN
-20 J/kg
Mixed-layer LCL
1567 m above ground
0-6 km bulk shear
30 kt
0-1 km storm-relative helicity
85 m²/s²
0-3 km storm-relative helicity
211 m²/s²
Significant tornado parameter
0.4
Supercell composite
8.5

Open this sounding in Storm Lab

The text

As transmitted.

175 
WUUS53 KTOP 160011
SVRTOP
KSC117-161-201-160100-
/O.NEW.KTOP.SV.W.0021.170416T0011Z-170416T0100Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Topeka KS
711 PM CDT SAT APR 15 2017

The National Weather Service in Topeka has issued a

* Severe Thunderstorm Warning for...
  Northwestern Riley County in northeastern Kansas...
  Southeastern Washington County in north central Kansas...
  Southwestern Marshall County in northeastern Kansas...

* Until 800 PM CDT

* At 710 PM CDT, a severe thunderstorm was located 8 miles south of 
  Blue Rapids, moving east at 15 mph. A second severe thunderstorm 
  was located 12 miles northeast of Green, also moving east at 15 
  mph.

  HAZARD...Ping pong ball size hail. 

  SOURCE...Emergency management and the public have reported quarter 
           size hail 12 miles north of Randolph at 706 PM.

  IMPACT...People and animals outdoors will be injured. Expect 
           damage to roofs, siding, windows, and vehicles. 

* This severe thunderstorm will remain over mainly rural areas of
  northwestern Riley...southeastern Washington and southwestern
  Marshall Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.

&&

LAT...LON 3957 9645 3957 9658 3955 9659 3949 9675
      3948 9696 3956 9696 3958 9694 3963 9679
      3972 9646
TIME...MOT...LOC 0010Z 252DEG 15KT 3957 9670 

HAIL...1.50IN
WIND...<50MPH
 
$$

BB
3 follow-up statements
543 
WWUS53 KTOP 160017
SVSTOP

Severe Weather Statement
National Weather Service Topeka KS
717 PM CDT SAT APR 15 2017

KSC117-161-201-160100-
/O.CON.KTOP.SV.W.0021.000000T0000Z-170416T0100Z/
Riley-Washington-Marshall-
717 PM CDT SAT APR 15 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM CDT
FOR NORTHWESTERN RILEY...SOUTHEASTERN WASHINGTON AND SOUTHWESTERN
MARSHALL COUNTIES...

At 716 PM CDT, a severe thunderstorm was located 8 miles northwest 
of Randolph, moving east at 20 mph. A second severe thunderstorm was 
located 8 miles north of Randolph, also moving east at 20 mph.

HAZARD...Golf ball size hail. 

SOURCE...Public reported golf ball size hail 8 miles northwest of 
         Randolph as 715 PM.

IMPACT...People and animals outdoors will be injured. Expect damage 
         to roofs, siding, windows, and vehicles. 

This severe thunderstorm will remain over mainly rural areas of
northwestern Riley...southeastern Washington and southwestern
Marshall Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.

&&

LAT...LON 3957 9645 3957 9658 3955 9659 3949 9675
      3948 9696 3956 9696 3958 9694 3963 9679
      3972 9646
TIME...MOT...LOC 0016Z 251DEG 19KT 3953 9683 

HAIL...1.75IN
WIND...<50MPH
 
$$

BB
558 
WWUS53 KTOP 160028
SVSTOP

Severe Weather Statement
National Weather Service Topeka KS
728 PM CDT SAT APR 15 2017

KSC201-160037-
/O.CAN.KTOP.SV.W.0021.000000T0000Z-170416T0100Z/
Washington-
728 PM CDT SAT APR 15 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHEASTERN WASHINGTON COUNTY
IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore the warning has been cancelled.

A severe thunderstorm watch remains in effect until 1100 PM CDT for
northeastern Kansas.

LAT...LON 3957 9645 3957 9658 3955 9659 3949 9675
      3948 9686 3952 9689 3957 9684 3957 9681
      3959 9680 3967 9646
TIME...MOT...LOC 0027Z 258DEG 21KT 3953 9678 

$$

KSC117-161-160100-
/O.CON.KTOP.SV.W.0021.000000T0000Z-170416T0100Z/
Riley-Marshall-
728 PM CDT SAT APR 15 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM CDT
FOR NORTH CENTRAL RILEY AND SOUTHWESTERN MARSHALL COUNTIES...

At 727 PM CDT, a severe thunderstorm was located 6 miles north of
Randolph, moving east at 25 mph.

HAZARD...Two inch hail. 

SOURCE...Public has reported up to golf ball size hail with this 
         storm when it was 8 miles northwest of Randolph.

IMPACT...People and animals outdoors will be injured. Expect damage 
         to roofs, siding, windows, and vehicles. 

This severe thunderstorm will remain over mainly rural areas of north
central Riley and southwestern Marshall Counties.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.

&&

LAT...LON 3957 9645 3957 9658 3955 9659 3949 9675
      3948 9686 3952 9689 3957 9684 3957 9681
      3959 9680 3967 9646
TIME...MOT...LOC 0027Z 258DEG 21KT 3953 9678 

HAIL...2.00IN
WIND...<50MPH
 
$$

BB
988 
WWUS53 KTOP 160050
SVSTOP

Severe Weather Statement
National Weather Service Topeka KS
750 PM CDT SAT APR 15 2017

KSC117-160059-
/O.CAN.KTOP.SV.W.0021.000000T0000Z-170416T0100Z/
Marshall-
750 PM CDT SAT APR 15 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN MARSHALL COUNTY
IS CANCELLED...
    
The severe thunderstorm which prompted the warning has moved out of 
the warned area. Therefore the warning has been cancelled.

A severe thunderstorm watch remains in effect until 1100 PM CDT for
northeastern Kansas.

LAT...LON 3956 9658 3955 9659 3949 9675 3948 9684
      3952 9687 3957 9681 3957 9659
TIME...MOT...LOC 0049Z 261DEG 19KT 3952 9674 

$$

KSC161-160100-
/O.CON.KTOP.SV.W.0021.000000T0000Z-170416T0100Z/
Riley-
750 PM CDT SAT APR 15 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 800 PM CDT
FOR NORTH CENTRAL RILEY COUNTY...

At 749 PM CDT, a severe thunderstorm was located 6 miles north of
Randolph, moving east at 20 mph.

HAZARD...Two inch hail. 

SOURCE...Radar indicated. This storm has a history of producing golf 
         ball size hail.

IMPACT...People and animals outdoors will be injured. Expect damage 
         to roofs, siding, windows, and vehicles. 

This severe thunderstorm will remain over mainly rural areas of north
central Riley County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Prepare immediately for large hail and deadly cloud to ground
lightning. Seek shelter inside a well-built structure. Stay away from
windows.

&&

LAT...LON 3956 9658 3955 9659 3949 9675 3948 9684
      3952 9687 3957 9681 3957 9659
TIME...MOT...LOC 0049Z 261DEG 19KT 3952 9674 

HAIL...2.00IN
WIND...<50MPH
 
$$

BB

The office that day

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

IssuedProductOfficeCountiesLasted
Apr 15, 7:52 PM CDTSevere Thunderstorm WarningTOPPottawatomie, Riley38 min
Apr 15, 7:54 PM CDTSevere Thunderstorm WarningTOPClay, Dickinson, Ottawa51 min
Apr 15, 8:16 PM CDTFlash Flood WarningTOPRiley4 hr
Apr 15, 8:20 PM CDTSevere Thunderstorm WarningTOPPottawatomie40 min
Apr 15, 8:26 PM CDTSevere Thunderstorm WarningTOPPottawatomie49 min
Apr 15, 8:51 PM CDTSevere Thunderstorm WarningTOPBrown39 min
Apr 15, 8:54 PM CDTSevere Thunderstorm WarningTOPClay, Ottawa51 min
Apr 15, 8:55 PM CDTSevere Thunderstorm WarningTOPJackson, Pottawatomie50 min
Apr 15, 9:21 PM CDTSevere Thunderstorm WarningTOPMarshall39 min
Apr 15, 9:35 PM CDTSevere Thunderstorm WarningTOPJackson, Jefferson40 min
Apr 15, 9:47 PM CDTSpecial Weather StatementTOPClay43 min
Apr 15, 10:15 PM CDTSpecial Weather StatementTOPOsage45 min
Apr 15, 10:28 PM CDTSevere Thunderstorm WarningTOPDickinson47 min
Apr 15, 10:38 PM CDTSpecial Weather StatementTOPOttawa37 min
Apr 15, 10:56 PM CDTSevere Thunderstorm WarningTOPDickinson, Geary, Morris49 min
Apr 15, 11:22 PM CDTSevere Thunderstorm WarningTOPWabaunsee38 min
Apr 15, 11:55 PM CDTSpecial Weather StatementTOPShawnee50 min
Apr 16, 12:26 AM CDTSpecial Weather StatementTOPOsage19 min
Apr 16, 12:41 AM CDTSpecial Weather StatementTOPDouglas, Franklin, Osage49 min
Apr 16, 1:31 AM CDTSpecial Weather StatementTOPAnderson29 min

Nearby

Severe Thunderstorm Warnings in Kansas, 2017Every severe thunderstorm warning in 2017

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.