Alert archive / Kansas / Tornado Warnings in 2017
Tornado Warning 20, NWS Topeka, KS
NWS Topeka, KS issued this tornado warning at Oct 6, 2017, 9:21 PM CDT for Clay County, Dickinson County, Ottawa County, Kansas. It was in force for 9 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
- Oct 6, 2017, 9:21 PM CDT (02:21 UTC)
- Expired
- Oct 6, 2017, 9:30 PM CDT
- In force
- 9 min
- Issued by
- NWS Topeka, KS
- Area
- Storm-based polygon
- Tornado
- Radar indicated
- Hail
- 0.75 in
Counties Clay County, KS, Dickinson County, KS, Ottawa County, KS
The radar
The Topeka radar (KTWX), 93 km from the middle of the area, began a volume at 02:25 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 |
|---|---|---|---|
| Oct 6, 3:47 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Topeka, KS (KFOE), launched 00:00Z, 2.4 hours before the alert went out and 144 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
- 773 J/kg
- Mixed-layer CIN
- -70 J/kg
- Mixed-layer LCL
- 955 m above ground
- 0-6 km bulk shear
- 45 kt
- 0-1 km storm-relative helicity
- 278 m²/s²
- 0-3 km storm-relative helicity
- 421 m²/s²
- Significant tornado parameter
- 1.3
- Supercell composite
- 13.4
The text
As transmitted.
704
WFUS53 KTOP 070221
TORTOP
KSC027-041-143-070230-
/O.NEW.KTOP.TO.W.0020.171007T0221Z-171007T0230Z/
BULLETIN - EAS ACTIVATION REQUESTED
Tornado Warning
National Weather Service Topeka KS
921 PM CDT FRI OCT 6 2017
The National Weather Service in Topeka has issued a
* Tornado Warning for...
Northwestern Dickinson County in central Kansas...
East central Ottawa County in north central Kansas...
Southwestern Clay County in north central Kansas...
* Until 930 PM CDT
* At 921 PM CDT, a severe thunderstorm capable of producing a tornado
was located near Longford, moving northeast at 40 mph.
HAZARD...Tornado.
SOURCE...Radar indicated rotation.
IMPACT...Flying debris will be dangerous to those caught without
shelter. Mobile homes will be damaged or destroyed.
Damage to roofs, windows, and vehicles will occur. Tree
damage is likely.
* This tornadic thunderstorm will remain over mainly rural areas of
northwestern Dickinson...east central Ottawa and southwestern Clay
Counties.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TAKE COVER NOW! Move to a basement or an interior room on the lowest
floor of a sturdy building. Avoid windows. If you are outdoors, in a
mobile home, or in a vehicle, move to the closest substantial shelter
and protect yourself from flying debris.
&&
LAT...LON 3925 9722 3912 9716 3908 9741 3913 9745
TIME...MOT...LOC 0221Z 237DEG 36KT 3913 9736
TORNADO...RADAR INDICATED
HAIL...<.75IN
$$
Skow1 follow-up statement
245
WWUS53 KTOP 070230
SVSTOP
Severe Weather Statement
National Weather Service Topeka KS
930 PM CDT FRI OCT 6 2017
KSC027-041-143-070240-
/O.EXP.KTOP.TO.W.0020.000000T0000Z-171007T0230Z/
Dickinson-Ottawa-Clay-
930 PM CDT FRI OCT 6 2017
...THE TORNADO WARNING FOR NORTHWESTERN DICKINSON...EAST CENTRAL
OTTAWA AND SOUTHWESTERN CLAY COUNTIES HAS EXPIRED...
The storm which prompted the warning has weakened below severe
limits, and no longer appears capable of producing a tornado.
Therefore the warning has been allowed to expire.
A severe thunderstorm watch remains in effect until 1100 PM CDT for
central and north central Kansas.
LAT...LON 3925 9722 3912 9716 3908 9741 3913 9745
TIME...MOT...LOC 0230Z 237DEG 36KT 3918 9726
$$
SkowThe office that day
Everything else NWS Topeka, KS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Oct 6, 7:16 PM CDT | Tornado Warning | TOP | Cloud, Ottawa | 29 min |
| Oct 6, 7:44 PM CDT | Severe Thunderstorm Warning | TOP | Cloud, Ottawa | 61 min |
| Oct 6, 7:49 PM CDT | Tornado Warning | TOP | Cloud | 26 min |
| Oct 6, 8:21 PM CDT | Severe Thunderstorm Warning | TOP | Clay, Republic, Washington | 39 min |
| Oct 6, 8:44 PM CDT | Special Weather Statement | TOP | Washington | 31 min |
| Oct 6, 8:56 PM CDT | Severe Thunderstorm Warning | TOP | Ottawa | 34 min |
| Oct 6, 9:17 PM CDT | Special Weather Statement | TOP | Clay, Dickinson, Geary, Riley | 28 min |
| Oct 6, 9:47 PM CDT | Special Weather Statement | TOP | Geary, Pottawatomie, Riley | 43 min |
| Oct 6, 9:55 PM CDT | Severe Thunderstorm Warning | TOP | Geary, Pottawatomie, Riley, Wabaunsee | 35 min |
| Oct 6, 10:17 PM CDT | Severe Thunderstorm Warning | TOP | Jackson, Marshall, Nemaha, Pottawatomie | 28 min |
| Oct 7, 3:34 AM CDT | River Flood Warning | TOP | Marshall | 44 hr |
| Oct 7, 2:20 PM CDT | River Flood Warning | TOP | Clay | 19 hr |
Nearby
Tornado Warnings in Kansas, 2017Every tornado warning in 2017Tornadoes in 2017
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.