Alert archive / Kansas / Severe Thunderstorm Warnings in 2017

Severe Thunderstorm Warning 139, NWS Topeka, KS

June 17, 2017Anderson County, Coffey County, Kansas

NWS Topeka, KS issued this severe thunderstorm warning at Jun 17, 2017, 9:21 PM CDT for Anderson County, Coffey County, Kansas. It was in force for 39 min. 2 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: Jun 17, 2017, 9:21 PM CDT (02:21 UTC)
Expired: Jun 17, 2017, 10:00 PM CDT
In force: 39 min
Issued by: NWS Topeka, KS
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

Counties Anderson County, KS, Coffey County, KS

The radar

The Topeka radar (KTWX), 97 km from the middle of the area, began a volume at 02:21 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
Jun 17, 9:23 PM CDT	TSTM WND GST 60	3 Nne New Strawn, KS
Jun 17, 9:35 PM CDT	TSTM WND DMG	4 W Burlington, KS	TREE BLOWN DOWN.

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

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 2 storm reports to this severe thunderstorm warning; the first came 2 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The watch it was issued in

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

Issued	Product	Office	Lasted
Jun 17, 6:12 PM CDT	Severe Thunderstorm Watch	SPC	7 hr

The nearest sounding before it

Topeka, KS (KFOE), launched 00:00Z, 2.4 hours before the alert went out and 90 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: 4476 J/kg
Mixed-layer CIN: -22 J/kg
Mixed-layer LCL: 1204 m above ground
0-6 km bulk shear: 52 kt
0-1 km storm-relative helicity: 4 m²/s²
0-3 km storm-relative helicity: 103 m²/s²
Significant tornado parameter: -0.3
Supercell composite: -1.9

Open this sounding in Storm Lab

The text

As transmitted.

067 
WUUS53 KTOP 180221
SVRTOP
KSC003-031-180300-
/O.NEW.KTOP.SV.W.0139.170618T0221Z-170618T0300Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Topeka KS
921 PM CDT SAT JUN 17 2017

The National Weather Service in Topeka has issued a

* Severe Thunderstorm Warning for...
  Southwestern Anderson County in east central Kansas...
  Coffey County in east central Kansas...

* Until 1000 PM CDT

* At 921 PM CDT, severe thunderstorms were located along a line
  extending from 5 miles southwest of Waverly to near Burlington to 4
  miles northwest of Gridley, moving southeast at 40 mph.

  HAZARD...60 mph wind gusts and penny size hail. 

  SOURCE...Radar indicated. 

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

* Severe thunderstorms will be near, 
  Burlington around 925 PM CDT. 
  Le Roy around 935 PM CDT. 
  Westphalia around 945 PM CDT. 
  Colony and Lone Elm around 1000 PM CDT. 

This includes Interstate 35 near mile marker 155.
 
PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3814 9596 3840 9594 3843 9572 3804 9511
      3804 9595
TIME...MOT...LOC 0221Z 316DEG 33KT 3836 9569 3822 9572 3815 9593 

HAIL...0.75IN
WIND...60MPH
 
$$

Skow

3 follow-up statements

588 
WWUS53 KTOP 180233
SVSTOP

Severe Weather Statement
National Weather Service Topeka KS
933 PM CDT SAT JUN 17 2017

KSC003-031-180300-
/O.CON.KTOP.SV.W.0139.000000T0000Z-170618T0300Z/
Anderson-Coffey-
933 PM CDT SAT JUN 17 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT
FOR SOUTHWESTERN ANDERSON AND COFFEY COUNTIES...

At 933 PM CDT, severe thunderstorms were located along a line
extending from 4 miles south of Waverly to 6 miles north of Le Roy to
near Gridley, moving southeast at 35 mph.

HAZARD...60 mph wind gusts and penny size hail. 

SOURCE...Radar indicated. 

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

These severe storms will be near...
  Le Roy around 940 PM CDT. 
  Westphalia around 950 PM CDT. 
  Colony around 955 PM CDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3814 9596 3827 9581 3843 9572 3804 9511
      3804 9595
TIME...MOT...LOC 0233Z 308DEG 32KT 3832 9559 3817 9561 3808 9585 

HAIL...0.75IN
WIND...60MPH
 
$$

Skow

824 
WWUS53 KTOP 180238
SVSTOP

Severe Weather Statement
National Weather Service Topeka KS
938 PM CDT SAT JUN 17 2017

KSC003-031-180300-
/O.CON.KTOP.SV.W.0139.000000T0000Z-170618T0300Z/
Anderson-Coffey-
938 PM CDT SAT JUN 17 2017

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1000 PM CDT
FOR SOUTHWESTERN ANDERSON AND SOUTHEASTERN COFFEY COUNTIES...

At 938 PM CDT, severe thunderstorms were located along a line
extending from 5 miles west of Harris to 3 miles southwest of
Westphalia to 5 miles southeast of Gridley, moving east at 40 mph.

HAZARD...60 mph wind gusts and penny size hail. 

SOURCE...Automated surface observation site. 

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

These severe storms will be near...
  Westphalia around 945 PM CDT. 
  Colony around 955 PM CDT. 
  Lone Elm around 1000 PM CDT. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

Wind damage with these storms will occur before any rain or
lightning. Do not wait for the sound of thunder before taking cover.
SEEK SHELTER IMMEDIATELY inside a sturdy structure and stay away from
windows.

&&

LAT...LON 3816 9593 3824 9581 3840 9567 3804 9511
      3804 9587
TIME...MOT...LOC 0238Z 290DEG 35KT 3830 9553 3815 9555 3806 9579 

HAIL...0.75IN
WIND...60MPH
 
$$

Skow

361 
WWUS53 KTOP 180255
SVSTOP

Severe Weather Statement
National Weather Service Topeka KS
955 PM CDT SAT JUN 17 2017

KSC003-031-180304-
/O.EXP.KTOP.SV.W.0139.000000T0000Z-170618T0300Z/
Anderson-Coffey-
955 PM CDT SAT JUN 17 2017

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN ANDERSON AND
SOUTHEASTERN COFFEY COUNTIES WILL EXPIRE AT 1000 PM CDT...
            
The storms which prompted the warning have weakened below severe
limits, and no longer pose an immediate threat to life or property.
Therefore the warning will be allowed to expire.  However small hail,
gusty winds and heavy rain are still possible with these
thunderstorms.

A severe thunderstorm watch remains in effect until 200 AM CDT for
east central Kansas.

LAT...LON 3816 9593 3824 9581 3840 9567 3804 9511
      3804 9587
TIME...MOT...LOC 0254Z 316DEG 33KT 3820 9540 3805 9542 3796 9566 

$$

Skow

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Topeka, KS wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 17, 6:47 PM CDT, 2 hours 34 minutes earlier.

Area forecast discussion, Jun 17, 6:47 PM CDT, 2 hours 34 minutes before

Area Forecast Discussion
National Weather Service Topeka KS
647 PM CDT Sat Jun 17 2017

...Update to aviation forecast discussion...

.SHORT TERM...(This evening through Sunday)
Issued at 244 PM CDT Sat Jun 17 2017

Early this afternoon, a frontal boundary was oriented southwest to
northeast across the CWA bisecting roughly from Ottawa to northern
Jackson county.  This frontal boundary will be the focus for storms
this afternoon and evening as a mid level shortwave sweeps across
the Central Plains.  While a cap remains in place most of the
afternoon, models do show an erosion late afternoon which would
allow for quick storm initation and intensification.  A highly
unstable atmosphere is in place with CAPE over 4000 J/kg and shear
values between 35-45 knots.  This would allow for storms to quickly
turn severe with supercells possible during initial development.
With steep lapse rates above the current EML, large hail and
damaging winds would be the main hazard with any storms, although an
isolated tornado or two cannot be ruled out.  Some hi-res guidance
suggests storms will develop in northern MO and build into
northeastern KS this afternoon.  Initial singular cells may begin to
form clusters as time goes on with some bowing segments within these
clusters.  If this occurred, the wind risk would be greatly
enhanced.  Location wise, the best chances for severe convection
looks to be along and south of I-70.  Storms will advance southeast
through the night, although post frontal showers and storms will be
possible through the early morning hours.  After tonight, dry
conditions can be expected with surface high pressure moving
directly over Kansas by tomorrow afternoon.

Temperatures this afternoon have been steadily rising into the low
90s, with mid to upper 90s expected as highs.  With dewpoints in the
70s, heat indicies look on track to reach between 100-110 degrees
across the entire area, with the hottest indices in east central
Kansas.  A heat advisory will remain in effect until 7PM this
evening for portions of the area. With the frontal passage in store
this evening, cooler temperatures can be expected tomorrow
along with less oppressive dewpoints.  Highs tomorrow look to top
out in the low 80s.

.LONG TERM...(Sunday night through Saturday)
Issued at 244 PM CDT Sat Jun 17 2017

Sunday night through Tuesday, an upper level trough will amplify
across the eastern conus and keep the central plains in
northwesterly flow aloft. Expect drier and cooler weather with
Highs on Monday in the mid 80s and highs on Tuesday in the upper
80s to lower 90s.

Tuesday night through Saturday, the mid and upper level flow will
become more zonal and a lee surface trough will deepen across the
high plains. Southerly low-level winds will advect deeper
moisture northward. Minor shortwave troughs embedded within the
zonal mid level flow may provide enough ascent for isolated to
scattered thunderstorms through the period. Highs will warm into
the mid to upper 90s Wednesday through Friday, and heat indices
once again may reach advisory criteria. A slightly stronger upper
trough will move across the northern and central plains on Friday
and will cause a surface cold front to push southward across the
CWA Friday night. Saturday may be cooler and drier if the front
can push southward into OK before becoming stationary. Highs on
Saturday may only reach the mid to upper 80s.

&&

.AVIATION...(For the 00Z TAFS through 00Z Sunday evening)
Issued at 642 PM CDT Sat Jun 17 2017

Currently, the near term for the 00Z TAFs are in the frontal zone
for the near term. Complicating factors with storm initiation are
becoming more clear. Bottom line is as further development takes
place, amendments will be likely. For now have left VCTS for
storms as the best placements may just be south of the terminals.
Do see another round of showers and storms coming into the
terminals overnight.

&&

.TOP WATCHES/WARNINGS/ADVISORIES...
Heat Advisory until 7 PM CDT this evening for KSZ022>024-026-
035>040-054>056-058-059.

&&

SHORT TERM...Heller
LONG TERM...Gargan
AVIATION...Drake

Hazardous weather outlook, Jun 17, 3:56 PM CDT, 5 hours 25 minutes before

Hazardous Weather Outlook
National Weather Service Topeka KS
356 PM CDT Sat Jun 17 2017

KSZ008>012-020>024-026-034>040-054>056-058-059-182100-
Republic-Washington-Marshall-Nemaha-Brown-Cloud-Clay-Riley-
Pottawatomie-Jackson-Jefferson-Ottawa-Dickinson-Geary-Morris-
Wabaunsee-Shawnee-Douglas-Lyon-Osage-Franklin-Coffey-Anderson-
356 PM CDT Sat Jun 17 2017

This hazardous weather outlook is for east central...north
central and northeast Kansas.

.DAY ONE...This Afternoon and tonight.

Another round of thunderstorms are forecast this evening across
eastern Kansas. The storms should develop after 4 pm and exit the
area by 10 pm. Large hail and damaging winds are the primary
threats but an isolated tornado cannot be ruled out. Local flash
flooding is possible if the storms traverse over the same areas
that received heavy rain Friday night.

A heat advisory remains in effect until 7 pm for areas along and
south of a line from Abilene to Manhattan to Holton. Heat indices
are forecast to range between 105 and 110 degrees this afternoon.

.DAYS TWO THROUGH SEVEN...Sunday through Friday.

No hazardous weather is expected at this time.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed through tonight.

&&

More detailed information can be accessed at...
http://www.weather.gov/top/sitrep

In the hours before

Local storm report, Jun 17, 7:51 PM CDT, 1 hour 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TOPEKA KS
751 PM CDT SAT JUN 17 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0745 PM     HAIL             6 NE GRANTVILLE         39.14N 95.49W
06/17/2017  E1.00 INCH       JEFFERSON          KS   EMERGENCY MNGR

&&

Local storm report, Jun 17, 8:11 PM CDT, 1 hour 10 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TOPEKA KS
811 PM CDT SAT JUN 17 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0810 PM     HAIL             HOYT                    39.25N 95.71W
06/17/2017  E1.00 INCH       JACKSON            KS   TRAINED SPOTTER

&&

Local storm report, Jun 17, 8:13 PM CDT, 1 hour 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TOPEKA KS
813 PM CDT SAT JUN 17 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0811 PM     HAIL             3 NNW MERIDEN           39.23N 95.59W
06/17/2017  E1.00 INCH       JEFFERSON          KS   TRAINED SPOTTER

            DIME TO QUARTER SIZED HAIL, HEAVY RAIN.

&&

Local storm report, Jun 17, 8:15 PM CDT, 1 hour 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TOPEKA KS
815 PM CDT SAT JUN 17 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0812 PM     TSTM WND GST     5 S AUBURN              38.84N 95.82W
06/17/2017  E60 MPH          OSAGE              KS   FIRE DEPT/RESCUE

&&

Local storm report, Jun 17, 8:16 PM CDT, 1 hour 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TOPEKA KS
816 PM CDT SAT JUN 17 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0811 PM     TSTM WND GST     BURLINGAME              38.76N 95.83W
06/17/2017  E60 MPH          OSAGE              KS   LAW ENFORCEMENT

&&

Local storm report, Jun 17, 8:25 PM CDT, 56 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TOPEKA KS
825 PM CDT SAT JUN 17 2017

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0819 PM     HAIL             1 W MERIDEN             39.19N 95.59W
06/17/2017  E1.00 INCH       JEFFERSON          KS   TRAINED SPOTTER

&&

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 17, 7:18 PM CDT	Severe Thunderstorm Warning	TOP	Douglas, Jefferson, Shawnee	42 min
Jun 17, 7:21 PM CDT	Severe Thunderstorm Warning	TOP	Jackson, Pottawatomie, Shawnee, Wabaunsee	39 min
Jun 17, 7:28 PM CDT	Severe Thunderstorm Warning	TOP	Geary, Morris, Wabaunsee	47 min
Jun 17, 7:34 PM CDT	Severe Thunderstorm Warning	TOP	Lyon, Osage, Shawnee, Wabaunsee	41 min
Jun 17, 7:44 PM CDT	Severe Thunderstorm Warning	TOP	Morris	46 min
Jun 17, 7:47 PM CDT	Severe Thunderstorm Warning	TOP	Douglas, Jefferson, Shawnee	43 min
Jun 17, 7:55 PM CDT	Severe Thunderstorm Warning	TOP	Lyon, Osage, Wabaunsee	35 min
Jun 17, 7:59 PM CDT	Severe Thunderstorm Warning	TOP	Jackson, Jefferson, Shawnee	46 min
Jun 17, 8:21 PM CDT	Severe Thunderstorm Warning	TOP	Lyon, Osage	39 min
Jun 17, 8:24 PM CDT	Severe Thunderstorm Warning	TOP	Jefferson	33 min
Jun 17, 8:34 PM CDT	Severe Thunderstorm Warning	TOP	Douglas, Franklin, Osage	41 min
Jun 17, 8:44 PM CDT	Severe Thunderstorm Warning	TOP	Coffey, Lyon, Osage	46 min
Jun 17, 8:58 PM CDT	Areal Flood Advisory	TOP	Jackson, Jefferson, Shawnee	2 hr
Jun 17, 9:05 PM CDT	Severe Thunderstorm Warning	TOP	Franklin	10 min

Nearby

Severe Thunderstorm Warnings in Kansas, 2017 Every 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.