Alert archive / Kansas / Severe Thunderstorm Warnings in 2021

Severe Thunderstorm Warning 6, NWS Topeka, KS

March 15, 2021Franklin County, Kansas

NWS Topeka, KS issued this severe thunderstorm warning at Mar 15, 2021, 3:54 PM CDT for Franklin County, Kansas. It was in force for 16 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: Mar 15, 2021, 3:54 PM CDT (20:54 UTC)
Expired: Mar 15, 2021, 4:10 PM CDT
In force: 16 min
Issued by: NWS Topeka, KS
Area: Storm-based polygon
Hail: 0.75 in
Wind: 60.0 mph

County Franklin County, KS

The radar

The Topeka radar (KTWX), 81 km from the middle of the area, began a volume at 20:58 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 nearest sounding before it

Topeka, KS (KTOP), launched 12:00Z, 8.9 hours before the alert went out and 43 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: 0 J/kg
Mixed-layer CIN: No buoyant parcel
Mixed-layer LCL: 685 m above ground
0-6 km bulk shear: 44 kt
0-1 km storm-relative helicity: 126 m²/s²
0-3 km storm-relative helicity: 178 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

Open this sounding in Storm Lab

The text

As transmitted.

414 
WUUS53 KTOP 152054
SVRTOP
KSC059-152130-
/O.NEW.KTOP.SV.W.0006.210315T2054Z-210315T2130Z/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Topeka KS
354 PM CDT Mon Mar 15 2021

The National Weather Service in Topeka has issued a

* Severe Thunderstorm Warning for...
  Northwestern Franklin County in east central Kansas...

* Until 430 PM CDT.

* At 353 PM CDT, a severe thunderstorm was located over Pomona,
  moving northeast at 15 mph.

  HAZARD...60 mph wind gusts.

  SOURCE...Radar indicated.

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

* Locations impacted include...
  Pomona.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3865 9525 3857 9551 3866 9551 3874 9544
      3874 9539
TIME...MOT...LOC 2053Z 231DEG 13KT 3861 9548 

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

Baerg

2 follow-up statements

139 
WWUS53 KTOP 152103
SVSTOP

Severe Weather Statement
National Weather Service Topeka KS
403 PM CDT Mon Mar 15 2021

KSC059-152130-
/O.CON.KTOP.SV.W.0006.000000T0000Z-210315T2130Z/
Franklin-
403 PM CDT Mon Mar 15 2021

...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 430 PM CDT
FOR NORTHWESTERN FRANKLIN COUNTY...

At 403 PM CDT, a severe thunderstorm was located near Pomona, moving
northeast at 20 mph.

HAZARD...60 mph wind gusts.

SOURCE...Radar indicated.

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

This severe thunderstorm will remain over mainly rural areas of
northwestern Franklin County.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 3865 9525 3861 9551 3866 9551 3874 9544
      3874 9539
TIME...MOT...LOC 2103Z 223DEG 15KT 3865 9544 

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

Baerg

215 
WWUS53 KTOP 152110
SVSTOP

Severe Weather Statement
National Weather Service Topeka KS
410 PM CDT Mon Mar 15 2021

KSC059-152119-
/O.CAN.KTOP.SV.W.0006.000000T0000Z-210315T2130Z/
Franklin-
410 PM CDT Mon Mar 15 2021

...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN FRANKLIN COUNTY
IS CANCELLED...
                
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled.  However gusty winds are
still possible with this thunderstorm.

LAT...LON 3865 9525 3861 9551 3866 9551 3874 9544
      3874 9539
TIME...MOT...LOC 2108Z 231DEG 13KT 3866 9542 

$$

Baerg

The office that day

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

Issued	Product	Office	Counties	Lasted
Mar 15, 4:46 AM CDT	River Flood Warning	TOP	Marshall	4 days
Mar 15, 3:27 PM CDT	Special Weather Statement	TOP	Osage	48 min
Mar 15, 3:32 PM CDT	Severe Thunderstorm Warning	TOP	Osage	30 min
Mar 15, 3:35 PM CDT	Special Weather Statement	TOP	Franklin	40 min
Mar 15, 3:40 PM CDT	Tornado Warning	TOP	Osage	20 min
Mar 15, 3:43 PM CDT	Severe Thunderstorm Warning	TOP	Franklin	32 min
Mar 15, 4:41 PM CDT	Special Weather Statement	TOP	Shawnee	34 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.