Alert archive / Kansas / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 122, NWS Topeka, KS
NWS Topeka, KS issued this severe thunderstorm warning at Aug 10, 2021, 4:56 PM CDT for Lyon County, Kansas. It was in force for 49 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
- Aug 10, 2021, 4:56 PM CDT (21:56 UTC)
- Expired
- Aug 10, 2021, 5:45 PM CDT
- In force
- 49 min
- Issued by
- NWS Topeka, KS
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Lyon County, KS
The radar
The Topeka radar (KTWX), 76 km from the middle of the area, began a volume at 22:00 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 |
|---|---|---|---|
| Aug 10, 5:12 PM CDT | HAIL 0.88 | Emporia, KS | RELAYED FROM KVOE RADIO. TIME ESTIMATED FROM RADAR. |
| Aug 10, 5:19 PM CDT | HAIL 0.7 | 2 Ese Emporia, KS | FROM KVOE RADIO. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Topeka, KS (KTOP), launched 12:00Z, 9.9 hours before the alert went out and 88 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.
- Mixed-layer CAPE
- 2232 J/kg
- Mixed-layer CIN
- -173 J/kg
- Mixed-layer LCL
- 877 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 228 m²/s²
- 0-3 km storm-relative helicity
- 258 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 8.0
The text
As transmitted.
736
WUUS53 KTOP 102156
SVRTOP
KSC111-102245-
/O.NEW.KTOP.SV.W.0122.210810T2156Z-210810T2245Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Topeka KS
456 PM CDT Tue Aug 10 2021
The National Weather Service in Topeka has issued a
* Severe Thunderstorm Warning for...
Southern Lyon County in east central Kansas...
* Until 545 PM CDT.
* At 456 PM CDT, a severe thunderstorm was located 5 miles southwest
of Emporia, moving east at 15 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage
to roofs, siding, and trees.
* Locations impacted include...
Emporia, Olpe, Hartford and Neosho Rapids.
This includes the following highways...
Interstate 35 between mile markers 128 and 141.
Kansas Turnpike between mile markers 120 and 127.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3826 9632 3837 9632 3850 9610 3841 9599
3826 9595 3826 9596 3825 9596 3825 9628
TIME...MOT...LOC 2156Z 249DEG 14KT 3833 9623
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Jones3 follow-up statements
035
WWUS53 KTOP 102206
SVSTOP
Severe Weather Statement
National Weather Service Topeka KS
506 PM CDT Tue Aug 10 2021
KSC111-102245-
/O.CON.KTOP.SV.W.0122.000000T0000Z-210810T2245Z/
Lyon-
506 PM CDT Tue Aug 10 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR SOUTHERN LYON COUNTY...
At 506 PM CDT, a severe thunderstorm was located 4 miles south of
Emporia, moving east at 15 mph.
HAZARD...70 mph wind gusts and ping pong ball size hail.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect hail
damage to roofs, siding, windows, and vehicles. Expect
considerable tree damage. Wind damage is also likely to
mobile homes, roofs, and outbuildings.
Locations impacted include...
Emporia, Olpe, Hartford and Neosho Rapids.
This includes the following highways...
Interstate 35 between mile markers 128 and 141.
Kansas Turnpike between mile markers 120 and 127.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3837 9632 3850 9610 3841 9599 3826 9595
3826 9596 3825 9596 3825 9629 3828 9632
TIME...MOT...LOC 2206Z 249DEG 14KT 3834 9618
THUNDERSTORM DAMAGE THREAT...CONSIDERABLE
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.50 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...70 MPH
$$
Jones161
WWUS53 KTOP 102220
SVSTOP
Severe Weather Statement
National Weather Service Topeka KS
520 PM CDT Tue Aug 10 2021
KSC111-102245-
/O.CON.KTOP.SV.W.0122.000000T0000Z-210810T2245Z/
Lyon-
520 PM CDT Tue Aug 10 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 PM CDT
FOR SOUTHERN LYON COUNTY...
At 520 PM CDT, a severe thunderstorm was located 5 miles southeast of
Emporia, moving east at 15 mph.
HAZARD...60 mph wind gusts and quarter size hail.
SOURCE...Radar indicated.
IMPACT...Hail damage to vehicles is expected. Expect wind damage to
roofs, siding, and trees.
Locations impacted include...
Emporia, Olpe, Hartford and Neosho Rapids.
This includes Interstate 35 between mile markers 130 and 141.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3836 9627 3850 9610 3841 9599 3826 9595
3826 9596 3825 9596 3825 9625
TIME...MOT...LOC 2220Z 250DEG 14KT 3835 9611
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...1.00 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
Jones143
WWUS53 KTOP 102237
SVSTOP
Severe Weather Statement
National Weather Service Topeka KS
537 PM CDT Tue Aug 10 2021
KSC111-102247-
/O.EXP.KTOP.SV.W.0122.000000T0000Z-210810T2245Z/
Lyon-
537 PM CDT Tue Aug 10 2021
...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN LYON COUNTY WILL
EXPIRE AT 545 PM CDT...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning will be allowed to expire. However gusty
winds and heavy rain are still possible with this thunderstorm.
LAT...LON 3836 9627 3850 9610 3841 9599 3826 9595
3826 9596 3825 9596 3825 9625
TIME...MOT...LOC 2237Z 254DEG 10KT 3834 9610
$$
JonesThe office that day
Everything else NWS Topeka, KS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 3:13 AM CDT | Special Weather Statement | TOP | Cloud | 32 min |
| Aug 10, 3:24 AM CDT | Severe Thunderstorm Warning | TOP | Cloud | 36 min |
| Aug 10, 3:30 AM CDT | Special Weather Statement | TOP | Ottawa | 30 min |
| Aug 10, 4:01 AM CDT | Special Weather Statement | TOP | Cloud, Ottawa | 29 min |
| Aug 10, 4:26 AM CDT | Special Weather Statement | TOP | Clay, Dickinson | 34 min |
| Aug 10, 4:57 AM CDT | Special Weather Statement | TOP | Clay, Dickinson, Geary, Riley | 33 min |
| Aug 10, 5:11 AM CDT | Severe Thunderstorm Warning | TOP | Pottawatomie, Riley | 22 min |
| Aug 10, 5:35 AM CDT | Special Weather Statement | TOP | Wabaunsee | 25 min |
| Aug 10, 6:12 AM CDT | Special Weather Statement | TOP | Shawnee | 33 min |
| Aug 10, 6:53 AM CDT | Special Weather Statement | TOP | Douglas | 37 min |
| Aug 10, 7:43 AM CDT | Special Weather Statement | TOP | Franklin | 32 min |
| Aug 10, 4:40 PM CDT | Special Weather Statement | TOP | Lyon | 35 min |
Nearby
Severe Thunderstorm Warnings in Kansas, 2021Every 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.