Alert archive / Kansas / Severe Thunderstorm Warnings in 2021
Severe Thunderstorm Warning 25, NWS Topeka, KS
NWS Topeka, KS issued this severe thunderstorm warning at May 8, 2021, 11:00 PM CDT for Jackson County, Jefferson County, Shawnee County, Kansas. It was in force for 45 min. 4 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
- May 8, 2021, 11:00 PM CDT (04:00 UTC)
- Expired
- May 8, 2021, 11:45 PM CDT
- In force
- 45 min
- Issued by
- NWS Topeka, KS
- Area
- Storm-based polygon
- Hail
- 0.88 in
- Wind
- 60.0 mph
Counties Jackson County, KS, Jefferson County, KS, Shawnee County, KS
The radar
The Topeka radar (KTWX), 75 km from the middle of the area, began a volume at 04:00 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 |
|---|---|---|---|
| May 8, 11:10 PM CDT | TSTM WND GST 70 | Valley Falls, KS | |
| May 8, 11:13 PM CDT | TSTM WND GST 70 | 4 W Oskaloosa, KS | ON K-92 HIGHWAY. |
| May 8, 11:16 PM CDT | TSTM WND GST 70 | 5 Sse Ozawkie, KS | |
| May 8, 11:20 PM CDT | TSTM WND DMG | 3 Wnw Mclouth, KS | TREE REPORTED DOWN AND BLOCKING THE ROAD. |
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.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 8, 6:30 PM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
Topeka, KS (KTOP), launched 00:00Z, 4.0 hours before the alert went out and 31 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
- 377 J/kg
- Mixed-layer CIN
- -170 J/kg
- Mixed-layer LCL
- 1653 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 106 m²/s²
- 0-3 km storm-relative helicity
- 362 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 6.0
The text
As transmitted.
077
WUUS53 KTOP 090400
SVRTOP
KSC085-087-177-090445-
/O.NEW.KTOP.SV.W.0025.210509T0400Z-210509T0445Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Topeka KS
1100 PM CDT Sat May 8 2021
The National Weather Service in Topeka has issued a
* Severe Thunderstorm Warning for...
Jefferson County in northeastern Kansas...
Northeastern Shawnee County in east central Kansas...
Southeastern Jackson County in northeastern Kansas...
* Until 1145 PM CDT.
* At 1059 PM CDT, severe thunderstorms were located along a line
extending from near Denison to 4 miles east of Silver Lake, moving
east at 35 mph.
HAZARD...60 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Northeastern Topeka, Valley Falls, Oskaloosa, Perry, McLouth,
Meriden, Hoyt, Ozawkie, Nortonville, Winchester, Denison,
Williamstown, Perry Lake and Grantville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 100 AM CDT for northeastern
and east central Kansas.
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3913 9519 3905 9519 3906 9540 3907 9544
3906 9548 3907 9583 3949 9563 3949 9557
3942 9557 3942 9518 3913 9518
TIME...MOT...LOC 0359Z 278DEG 29KT 3942 9561 3909 9578
HAIL...0.88IN
WIND...60MPH
$$
Skow2 follow-up statements
782
WWUS53 KTOP 090416
SVSTOP
Severe Weather Statement
National Weather Service Topeka KS
1116 PM CDT Sat May 8 2021
KSC085-087-177-090445-
/O.CON.KTOP.SV.W.0025.000000T0000Z-210509T0445Z/
Jefferson-Shawnee-Jackson-
1116 PM CDT Sat May 8 2021
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1145 PM CDT
FOR JEFFERSON...NORTHEASTERN SHAWNEE AND SOUTHEASTERN JACKSON
COUNTIES...
At 1115 PM CDT, severe thunderstorms were located along a line
extending from 4 miles east of Nortonville to near Perry, moving east
at 45 mph.
HAZARD...70 mph wind gusts and nickel size hail.
SOURCE...Emergency management.
IMPACT...Expect considerable tree damage. Damage is likely to mobile
homes, roofs, and outbuildings.
Locations impacted include...
Northeastern Topeka, Valley Falls, Oskaloosa, Perry, McLouth,
Meriden, Ozawkie, Nortonville, Winchester, Williamstown, Perry Lake
and Grantville.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
A Tornado Watch remains in effect until 100 AM CDT for northeastern
and east central Kansas.
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with these storms, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 3913 9519 3905 9519 3906 9540 3907 9544
3906 9548 3907 9578 3949 9557 3942 9557
3942 9518 3913 9518
TIME...MOT...LOC 0415Z 274DEG 41KT 3940 9526 3907 9543
HAIL...0.88IN
WIND...70MPH
$$810
WWUS53 KTOP 090443
SVSTOP
Severe Weather Statement
National Weather Service Topeka KS
1143 PM CDT Sat May 8 2021
KSC085-087-177-090453-
/O.EXP.KTOP.SV.W.0025.000000T0000Z-210509T0445Z/
Jefferson-Shawnee-Jackson-
1143 PM CDT Sat May 8 2021
...THE SEVERE THUNDERSTORM WARNING FOR JEFFERSON...NORTHEASTERN
SHAWNEE AND SOUTHEASTERN JACKSON COUNTIES WILL EXPIRE AT 1145 PM
CDT...
The storms which prompted the warning have moved out of the area.
Therefore, the warning will be allowed to expire. However gusty
winds are still possible with these thunderstorms through 1200 AM.
A Tornado Watch remains in effect until 100 AM CDT for northeastern
and east central Kansas.
LAT...LON 3913 9519 3905 9519 3906 9540 3907 9544
3906 9548 3907 9578 3949 9557 3942 9557
3942 9518 3913 9518
TIME...MOT...LOC 0443Z 278DEG 29KT 3937 9498 3904 9516
$$The office that day
Everything else NWS Topeka, KS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 8, 7:15 PM CDT | Special Weather Statement | TOP | Republic | 15 min |
| May 8, 7:27 PM CDT | Severe Thunderstorm Warning | TOP | Republic | 33 min |
| May 8, 7:52 PM CDT | Special Weather Statement | TOP | Marshall | 23 min |
| May 8, 7:56 PM CDT | Severe Thunderstorm Warning | TOP | Republic, Washington | 49 min |
| May 8, 8:03 PM CDT | Severe Thunderstorm Warning | TOP | Marshall | 42 min |
| May 8, 8:38 PM CDT | Severe Thunderstorm Warning | TOP | Marshall, Washington | 52 min |
| May 8, 8:48 PM CDT | Severe Thunderstorm Warning | TOP | Dickinson | 57 min |
| May 8, 9:24 PM CDT | Severe Thunderstorm Warning | TOP | Geary, Morris, Riley | 51 min |
| May 8, 9:27 PM CDT | Special Weather Statement | TOP | Marshall | 33 min |
| May 8, 9:51 PM CDT | Severe Thunderstorm Warning | TOP | Geary, Pottawatomie, Riley | 24 min |
| May 8, 10:03 PM CDT | Severe Thunderstorm Warning | TOP | Geary, Jackson, Morris, Pottawatomie, Riley, Shawnee and 1 more | 42 min |
| May 8, 10:11 PM CDT | Tornado Warning | TOP | Pottawatomie, Riley, Wabaunsee | 21 min |
| May 8, 10:43 PM CDT | Severe Thunderstorm Warning | TOP | Lyon, Osage, Shawnee, Wabaunsee | 47 min |
| May 8, 11:00 PM CDT | Severe Thunderstorm Warning | TOP | Dickinson | 45 min |
| May 8, 11:26 PM CDT | Special Weather Statement | TOP | Douglas | 49 min |
| May 8, 11:42 PM CDT | Areal Flood Advisory | TOP | Shawnee, Wabaunsee | 3 hr |
| May 9, 12:00 AM CDT | Areal Flood Advisory | TOP | Dickinson, Geary | 3 hr |
| May 9, 12:00 AM CDT | Special Weather Statement | TOP | Dickinson | 45 min |
| May 9, 12:15 AM CDT | Flash Flood Warning | TOP | Shawnee, Wabaunsee | 4 hr |
| May 9, 12:31 AM CDT | Areal Flood Advisory | TOP | Douglas | 3 hr |
| May 9, 12:58 AM CDT | Special Weather Statement | TOP | Morris | 47 min |
| May 9, 2:28 AM CDT | Special Weather Statement | TOP | Coffey | 32 min |
| May 9, 3:56 AM CDT | Special Weather Statement | TOP | Douglas, Jackson, Jefferson, Shawnee | 49 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.