Alert archive / Kansas / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 157, NWS Topeka, KS
NWS Topeka, KS issued this severe thunderstorm warning at Aug 20, 2021, 11:30 PM CDT for Douglas County, Franklin County, Osage County, Kansas. It was in force for 25 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
- Aug 20, 2021, 11:30 PM CDT (04:30 UTC)
- Expired
- Aug 20, 2021, 11:55 PM CDT
- In force
- 25 min
- Issued by
- NWS Topeka, KS
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Douglas County, KS, Franklin County, KS, Osage County, KS
The radar
The Pleasant Hill radar (KEAX), 82 km from the middle of the area, began a volume at 04:33 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 |
|---|---|---|---|
| Aug 20, 7:40 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Topeka, KS (KTOP), launched 00:00Z, 4.5 hours before the alert went out and 48 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
- 3676 J/kg
- Mixed-layer CIN
- -53 J/kg
- Mixed-layer LCL
- 1017 m above ground
- 0-6 km bulk shear
- 18 kt
- 0-1 km storm-relative helicity
- 145 m²/s²
- 0-3 km storm-relative helicity
- 242 m²/s²
- Significant tornado parameter
- 3.1
- Supercell composite
- 18.5
The text
As transmitted.
420
WUUS53 KTOP 210430
SVRTOP
KSC045-059-139-210515-
/O.NEW.KTOP.SV.W.0157.210821T0430Z-210821T0515Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Topeka KS
1130 PM CDT Fri Aug 20 2021
The National Weather Service in Topeka has issued a
* Severe Thunderstorm Warning for...
Northern Franklin County in east central Kansas...
Southern Douglas County in east central Kansas...
Northeastern Osage County in east central Kansas...
* Until 1215 AM CDT.
* At 1130 PM CDT, a severe thunderstorm was located 4 miles southeast
of Overbrook, moving east at 45 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Ottawa, Baldwin City, Wellsville, Overbrook, Centropolis, Pomona,
Pleasant Grove, Vinland, Globe and Pomona Lake.
This includes Interstate 35 between mile markers 188 and 198.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3869 9507 3862 9507 3861 9561 3884 9562
3887 9507 3884 9505 3870 9506
TIME...MOT...LOC 0430Z 265DEG 41KT 3872 9551
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
CP2 follow-up statements
353
WWUS53 KTOP 210440
SVSTOP
Severe Weather Statement
National Weather Service Topeka KS
1140 PM CDT Fri Aug 20 2021
KSC139-210449-
/O.CAN.KTOP.SV.W.0157.000000T0000Z-210821T0515Z/
Osage-
1140 PM CDT Fri Aug 20 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN OSAGE COUNTY IS
CANCELLED...
The severe thunderstorm which prompted the warning has moved out of
the warned area. Therefore, the warning has been cancelled.
A Severe Thunderstorm Watch remains in effect until 200 AM CDT for
east central Kansas.
LAT...LON 3869 9507 3862 9507 3861 9548 3885 9548
3887 9507 3884 9505 3870 9506
TIME...MOT...LOC 0439Z 264DEG 44KT 3874 9534
$$
KSC045-059-210515-
/O.CON.KTOP.SV.W.0157.000000T0000Z-210821T0515Z/
Franklin-Douglas-
1140 PM CDT Fri Aug 20 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1215 AM CDT
FOR NORTHERN FRANKLIN AND SOUTHERN DOUGLAS COUNTIES...
At 1139 PM CDT, a severe thunderstorm was located over Centropolis,
moving east at 50 mph.
HAZARD...60 mph wind gusts.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
Locations impacted include...
Ottawa, Baldwin City, Wellsville, Centropolis, Pomona, Pleasant
Grove, Vinland and Globe.
This includes Interstate 35 between mile markers 188 and 198.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
&&
LAT...LON 3869 9507 3862 9507 3861 9548 3885 9548
3887 9507 3884 9505 3870 9506
TIME...MOT...LOC 0439Z 264DEG 44KT 3874 9534
HAIL THREAT...RADAR INDICATED
MAX HAIL SIZE...<.75 IN
WIND THREAT...RADAR INDICATED
MAX WIND GUST...60 MPH
$$
CP062
WWUS53 KTOP 210455
SVSTOP
Severe Weather Statement
National Weather Service Topeka KS
1155 PM CDT Fri Aug 20 2021
KSC045-059-210504-
/O.CAN.KTOP.SV.W.0157.000000T0000Z-210821T0515Z/
Franklin-Douglas-
1155 PM CDT Fri Aug 20 2021
...THE SEVERE THUNDERSTORM WARNING FOR NORTHERN FRANKLIN AND SOUTHERN
DOUGLAS COUNTIES IS CANCELLED...
The storm which prompted the warning has weakened below severe
limits, and no longer poses an immediate threat to life or property.
Therefore, the warning has been cancelled. However gusty winds and
heavy rain are still possible with this thunderstorm.
A Severe Thunderstorm Watch remains in effect until 200 AM CDT for
east central Kansas.
LAT...LON 3869 9507 3862 9507 3861 9548 3885 9548
3887 9507 3884 9505 3870 9506
TIME...MOT...LOC 0452Z 265DEG 41KT 3876 9511
$$
CPThe office that day
Everything else NWS Topeka, KS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 7:07 PM CDT | Severe Thunderstorm Warning | TOP | Clay, Dickinson, Geary, Riley | 38 min |
| Aug 20, 7:15 PM CDT | Special Weather Statement | TOP | Marshall, Nemaha | 30 min |
| Aug 20, 7:23 PM CDT | Severe Thunderstorm Warning | TOP | Pottawatomie | 37 min |
| Aug 20, 7:27 PM CDT | Severe Thunderstorm Warning | TOP | Geary, Pottawatomie, Riley | 33 min |
| Aug 20, 7:45 PM CDT | Special Weather Statement | TOP | Brown, Jackson, Nemaha, Pottawatomie | 30 min |
| Aug 20, 7:51 PM CDT | Severe Thunderstorm Warning | TOP | Brown, Nemaha | 39 min |
| Aug 20, 7:56 PM CDT | Severe Thunderstorm Warning | TOP | Jackson, Pottawatomie, Riley, Wabaunsee | 34 min |
| Aug 20, 8:01 PM CDT | Severe Thunderstorm Warning | TOP | Dickinson, Morris | 44 min |
| Aug 20, 8:29 PM CDT | Special Weather Statement | TOP | Jackson, Wabaunsee | 31 min |
| Aug 20, 8:32 PM CDT | Severe Thunderstorm Warning | TOP | Geary, Lyon, Morris, Wabaunsee | 28 min |
| Aug 20, 8:33 PM CDT | Special Weather Statement | TOP | Cloud | 27 min |
| Aug 20, 8:58 PM CDT | Special Weather Statement | TOP | Brown, Geary, Jackson, Jefferson, Nemaha, Pottawatomie and 2 more | 47 min |
| Aug 20, 9:01 PM CDT | Special Weather Statement | TOP | Lyon | 29 min |
| Aug 20, 9:37 PM CDT | Special Weather Statement | TOP | Lyon, Osage | 23 min |
| Aug 20, 9:40 PM CDT | Special Weather Statement | TOP | Brown, Jackson, Jefferson, Pottawatomie, Shawnee, Wabaunsee | 35 min |
| Aug 20, 9:43 PM CDT | Severe Thunderstorm Warning | TOP | Douglas, Jefferson, Osage, Shawnee | 32 min |
| Aug 20, 9:53 PM CDT | Severe Thunderstorm Warning | TOP | Jackson, Jefferson, Shawnee | 37 min |
| Aug 20, 10:00 PM CDT | Severe Thunderstorm Warning | TOP | Douglas, Jefferson, Osage, Shawnee | 45 min |
| Aug 20, 10:08 PM CDT | Severe Thunderstorm Warning | TOP | Jefferson | 37 min |
| Aug 20, 10:32 PM CDT | Areal Flood Advisory | TOP | Jackson, Jefferson | 2 hr |
| Aug 20, 10:40 PM CDT | Special Weather Statement | TOP | Osage | 50 min |
| Aug 20, 11:06 PM CDT | Severe Thunderstorm Warning | TOP | Osage | 24 min |
| Aug 21, 12:57 AM CDT | Special Weather Statement | TOP | Anderson | 48 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.