Alert archive / Kansas / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 137, NWS Topeka, KS
NWS Topeka, KS issued this severe thunderstorm warning at Jul 11, 2020, 12:32 PM CDT for Brown County, Jackson County, Nemaha County, Kansas. It was in force for 33 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 11, 2020, 12:32 PM CDT (17:32 UTC)
- Expired
- Jul 11, 2020, 1:05 PM CDT
- In force
- 33 min
- Issued by
- NWS Topeka, KS
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 60.0 mph
Counties Brown County, KS, Jackson County, KS, Nemaha County, KS
The radar
The Topeka radar (KTWX), 85 km from the middle of the area, began a volume at 17:36 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, 5.5 hours before the alert went out and 76 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
- 666 J/kg
- Mixed-layer CIN
- -265 J/kg
- Mixed-layer LCL
- 1148 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 23 m²/s²
- 0-3 km storm-relative helicity
- 8 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Jul 11, 5:25 AM CDT, 7 hours 7 minutes earlier.
Area forecast discussion, Jul 11, 5:25 AM CDT, 7 hours 7 minutes before
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</html>Hazardous weather outlook, Jul 11, 9:24 AM CDT, 3 hours 8 minutes before
Hazardous Weather Outlook National Weather Service Topeka KS 924 AM CDT Sat Jul 11 2020 KSZ008>012-020>024-026-034>040-054>056-058-059-121430- Republic-Washington-Marshall-Nemaha-Brown-Cloud-Clay-Riley- Pottawatomie-Jackson-Jefferson-Ottawa-Dickinson-Geary-Morris- Wabaunsee-Shawnee-Douglas-Lyon-Osage-Franklin-Coffey-Anderson- 924 AM CDT Sat Jul 11 2020 This hazardous weather outlook is for east central...north central and northeast Kansas. .DAY ONE...Today and Tonight. Scattered strong to severe thunderstorms may develop this afternoon anywhere across northeast and east central Kansas. Some of these storms could produce large hail and damaging winds. An isolated tornado cannot be ruled out. .DAYS TWO THROUGH SEVEN...Sunday through Friday. There is some potential for an extended period of hot weather by the end of next week. .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
Special weather statement, Jul 11, 11:32 AM CDT, 1 hour before
Special Weather Statement
National Weather Service Topeka KS
1132 AM CDT Sat Jul 11 2020
KSZ009-010-111700-
Washington-Marshall-
1132 AM CDT Sat Jul 11 2020
...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN WASHINGTON AND
NORTHWESTERN MARSHALL COUNTIES UNTIL NOON CDT...
At 1130 AM CDT, Doppler radar was tracking a strong thunderstorm 4
miles southeast of Hollenberg, moving southeast at 25 mph.
Pea size hail and wind gusts up to 50 mph will be possible with this
storm.
Locations impacted include...
Hanover, Hollenberg and Bremen.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
&&
LAT...LON 3990 9657 3973 9690 3993 9713 4000 9701
4000 9685
TIME...MOT...LOC 1630Z 309DEG 21KT 3993 9695
JPSpecial weather statement, Jul 11, 12:12 PM CDT, 20 minutes before
Special Weather Statement National Weather Service Topeka KS 1212 PM CDT Sat Jul 11 2020 KSZ009-010-022-023-111745- Pottawatomie-Riley-Washington-Marshall- 1212 PM CDT Sat Jul 11 2020 ...SIGNIFICANT WEATHER ADVISORY FOR NORTH CENTRAL RILEY... NORTHWESTERN POTTAWATOMIE...SOUTHEASTERN WASHINGTON AND SOUTHWESTERN MARSHALL COUNTIES UNTIL 1245 PM CDT... At 1212 PM CDT, Doppler radar was tracking a strong thunderstorm near Waterville, moving southeast at 30 mph. Half inch hail and wind gusts up to 50 mph will be possible with this storm. Locations impacted include... Blue Rapids and Waterville. PRECAUTIONARY/PREPAREDNESS ACTIONS... This storm may intensify, so be certain to monitor local radio stations and available television stations for additional information and possible warnings from the National Weather Service. && LAT...LON 3957 9651 3938 9667 3961 9693 3976 9679 TIME...MOT...LOC 1712Z 307DEG 26KT 3964 9678 JP
Special weather statement, Jul 11, 12:19 PM CDT, 13 minutes before
Special Weather Statement
National Weather Service Topeka KS
1219 PM CDT Sat Jul 11 2020
KSZ011-111745-
Nemaha-
1219 PM CDT Sat Jul 11 2020
...SIGNIFICANT WEATHER ADVISORY FOR NORTHEASTERN NEMAHA COUNTY UNTIL
1245 PM CDT...
At 1218 PM CDT, Doppler radar was tracking a strong thunderstorm 7
miles north of Baileyville, moving east at 40 mph.
Half inch hail and wind gusts up to 50 mph will be possible with this
storm.
Locations impacted include...
Sabetha, Seneca, Bern, Goff, Oneida and Woodlawn.
LAT...LON 3994 9579 3987 9579 3965 9594 3990 9624
3998 9624 4000 9623 4000 9600
TIME...MOT...LOC 1718Z 291DEG 34KT 3994 9614
JPThe office that day
Everything else NWS Topeka, KS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 11, 1:34 AM CDT | Special Weather Statement | TOP | Republic, Washington | 56 min |
| Jul 11, 11:32 AM CDT | Special Weather Statement | TOP | Washington | 28 min |
| Jul 11, 12:12 PM CDT | Special Weather Statement | TOP | Marshall | 33 min |
| Jul 11, 12:19 PM CDT | Special Weather Statement | TOP | Nemaha | 26 min |
| Jul 11, 12:45 PM CDT | Severe Thunderstorm Warning | TOP | Pottawatomie | 45 min |
| Jul 11, 1:17 PM CDT | Severe Thunderstorm Warning | TOP | Jackson, Pottawatomie, Shawnee, Wabaunsee | 43 min |
| Jul 11, 1:37 PM CDT | Severe Thunderstorm Warning | TOP | Jackson, Marshall, Nemaha, Pottawatomie | 38 min |
| Jul 11, 1:55 PM CDT | Severe Thunderstorm Warning | TOP | Osage, Shawnee, Wabaunsee | 50 min |
| Jul 11, 2:25 PM CDT | Severe Thunderstorm Warning | TOP | Franklin, Osage | 50 min |
| Jul 11, 2:34 PM CDT | Severe Thunderstorm Warning | TOP | Jackson, Jefferson, Pottawatomie, Shawnee | 41 min |
| Jul 11, 2:53 PM CDT | Severe Thunderstorm Warning | TOP | Anderson, Coffey, Franklin, Osage | 37 min |
| Jul 11, 3:10 PM CDT | Severe Thunderstorm Warning | TOP | Anderson, Coffey, Franklin, Osage | 50 min |
| Jul 11, 3:23 PM CDT | Severe Thunderstorm Warning | TOP | Anderson, Coffey, Franklin | 52 min |
| Jul 11, 3:27 PM CDT | Special Weather Statement | TOP | Douglas | 33 min |
| Jul 11, 3:53 PM CDT | Special Weather Statement | TOP | Douglas | 22 min |
| Jul 11, 3:59 PM CDT | Severe Thunderstorm Warning | TOP | Anderson, Coffey | 25 min |
| Jul 11, 4:09 PM CDT | Special Weather Statement | TOP | Franklin | 36 min |
Nearby
Severe Thunderstorm Warnings in Kansas, 2020Every severe thunderstorm warning in 2020
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.