Alert archive / Kansas / Tornado Watches in 2021
Tornado Watch 309
The Storm Prediction Center issued this tornado watch at Jun 24, 2021, 3:44 PM CDT for 4 states. It was in force for 5 hr.
The area
The outline as issued.
The facts
- Issued
- Jun 24, 2021, 3:44 PM CDT (20:44 UTC)
- Expired
- Jun 24, 2021, 9:00 PM CDT
- In force
- 5 hr
- Issued by
- the Storm Prediction Center
- Largest hail expected
- 3 in
- Strongest gust expected
- 65 kt
All 30 counties
Fremont County, IA, Page County, IA, Atchison County, KS, Brown County, KS, Clay County, KS, Cloud County, KS, Doniphan County, KS, Jackson County, KS, Jewell County, KS, Marshall County, KS, Mitchell County, KS, Nemaha County, KS, Pottawatomie County, KS, Republic County, KS, Riley County, KS, Washington County, KS, Andrew County, MO, Atchison County, MO, Buchanan County, MO, Holt County, MO, Nodaway County, MO, Gage County, NE, Jefferson County, NE, Johnson County, NE, Nemaha County, NE, Nuckolls County, NE, Otoe County, NE, Pawnee County, NE, Richardson County, NE, Thayer County, NE
The radar
The Topeka radar (KTWX), 120 km from the middle of the area, began a volume at 20:46 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 SPC expected
The probabilities SPC published with the watch, for the watch area over its life.
- Two or more tornadoes
- 50%
- One or more EF2 to EF5 tornadoes
- 30%
- Ten or more severe wind reports
- 80%
- One or more gusts of 65 knots or more
- 60%
- Ten or more severe hail reports
- 90%
- One or more hailstones of 2 inches or more
- 60%
- Six or more combined severe hail and wind reports
- 95%
Warnings issued inside it
42 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 24, 4:09 PM CDT | Severe Thunderstorm Warning | GID | Adams, Clay, Nuckolls, Webster | 31 min |
| Jun 24, 5:10 PM CDT | Severe Thunderstorm Warning | OAX | Cass, Lancaster, Otoe | 40 min |
| Jun 24, 5:29 PM CDT | Severe Thunderstorm Warning | GID | Fillmore, Thayer, York | 46 min |
| Jun 24, 5:34 PM CDT | Severe Thunderstorm Warning | TOP | Marshall | 26 min |
| Jun 24, 5:34 PM CDT | Flash Flood Warning | OAX | Cass, Lancaster, Otoe | 4 hr |
| Jun 24, 5:35 PM CDT | Severe Thunderstorm Warning | OAX | Gage, Jefferson, Saline, Seward | 40 min |
| Jun 24, 5:43 PM CDT | Tornado Warning | OAX | Otoe | 47 min |
| Jun 24, 5:45 PM CDT | Tornado Warning | TOP | Marshall | 30 min |
| Jun 24, 6:01 PM CDT | Severe Thunderstorm Warning | TOP | Marshall, Nemaha | 44 min |
| Jun 24, 6:07 PM CDT | Tornado Warning | TOP | Marshall | 23 min |
| Jun 24, 6:07 PM CDT | Tornado Warning | OAX | Otoe | 38 min |
| Jun 24, 6:12 PM CDT | Flash Flood Warning | OAX | Pawnee, Richardson | 8 hr |
| Jun 24, 6:12 PM CDT | Severe Thunderstorm Warning | OAX | Gage, Lancaster, Saline, Seward | 48 min |
| Jun 24, 6:16 PM CDT | Tornado Warning | TOP | Marshall, Nemaha | 29 min |
| Jun 24, 6:26 PM CDT | Tornado Warning | TOP | Marshall, Nemaha | 34 min |
| Jun 24, 6:28 PM CDT | Severe Thunderstorm Warning | OAX | Richardson | 47 min |
| Jun 24, 6:32 PM CDT | Flash Flood Warning | EAX | Andrew, Atchison, Holt, Nodaway | 8 hr |
| Jun 24, 6:34 PM CDT | Tornado Warning | OAX | Richardson | 41 min |
| Jun 24, 6:36 PM CDT | Severe Thunderstorm Warning | TOP | Brown, Nemaha | 24 min |
| Jun 24, 6:43 PM CDT | Severe Thunderstorm Warning | OAX | Fremont | 47 min |
| Jun 24, 6:46 PM CDT | Severe Thunderstorm Warning | TOP | Pottawatomie, Riley | 29 min |
| Jun 24, 6:53 PM CDT | Severe Thunderstorm Warning | EAX | Atchison, Holt, Nodaway | 52 min |
| Jun 24, 7:00 PM CDT | Severe Thunderstorm Warning | TOP | Brown, Nemaha | 45 min |
| Jun 24, 7:03 PM CDT | Severe Thunderstorm Warning | EAX | Atchison | 42 min |
| Jun 24, 7:05 PM CDT | Severe Thunderstorm Warning | OAX | Pawnee, Richardson | 21 min |
| Jun 24, 7:07 PM CDT | Severe Thunderstorm Warning | TOP | Pottawatomie | 23 min |
| Jun 24, 7:16 PM CDT | Flash Flood Warning | OAX | Richardson | 8 hr |
| Jun 24, 7:17 PM CDT | Severe Thunderstorm Warning | EAX | Doniphan | 43 min |
| Jun 24, 7:17 PM CDT | Severe Thunderstorm Warning | TOP | Marshall, Nemaha | 43 min |
| Jun 24, 7:25 PM CDT | Severe Thunderstorm Warning | TOP | Brown | 35 min |
| Jun 24, 7:45 PM CDT | Severe Thunderstorm Warning | EAX | Andrew, DeKalb, Gentry, Nodaway | 45 min |
| Jun 24, 7:49 PM CDT | Severe Thunderstorm Warning | TOP | Nemaha | 26 min |
| Jun 24, 7:55 PM CDT | Flash Flood Warning | TOP | Brown, Nemaha | 7 hr |
| Jun 24, 8:04 PM CDT | Severe Thunderstorm Warning | OAX | Fremont, Page | 26 min |
| Jun 24, 8:07 PM CDT | Severe Thunderstorm Warning | TOP | Pottawatomie, Riley | 23 min |
| Jun 24, 8:11 PM CDT | Severe Thunderstorm Warning | TOP | Brown, Nemaha | 49 min |
| Jun 24, 8:12 PM CDT | Severe Thunderstorm Warning | EAX | Andrew, Daviess, DeKalb, Gentry, Grundy, Harrison and 2 more | 48 min |
| Jun 24, 8:27 PM CDT | Flash Flood Warning | EAX | Doniphan | 16 hr |
| Jun 24, 8:37 PM CDT | Severe Thunderstorm Warning | EAX | Atchison, Doniphan | 38 min |
| Jun 24, 8:41 PM CDT | Severe Thunderstorm Warning | TOP | Brown, Jackson, Nemaha | 34 min |
| Jun 24, 8:43 PM CDT | Severe Thunderstorm Warning | TOP | Geary, Pottawatomie, Riley, Wabaunsee | 32 min |
| Jun 24, 9:00 PM CDT | Severe Thunderstorm Warning | EAX | Atchison, Leavenworth | 60 min |
Discussions around it
SPC mesoscale discussions over the same counties from four hours before the watch to its end.
- Mesoscale Discussion 1076 Severe potential...tornado watch likely
- Mesoscale Discussion 1081 Tornado watch 309
- Mesoscale Discussion 1082 Severe potential...watch likely
- Mesoscale Discussion 1084 Tornado watch 309...310
- Mesoscale Discussion 1085 Severe thunderstorm watch 310
- Mesoscale Discussion 1086 Tornado watch 309...311
The nearest sounding before it
Topeka, KS (KTOP), launched 12:00Z, 8.7 hours before the alert went out and 149 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
- 2072 J/kg
- Mixed-layer CIN
- -283 J/kg
- Mixed-layer LCL
- 688 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 342 m²/s²
- 0-3 km storm-relative helicity
- 386 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted.
247
WWUS20 KWNS 242042
SEL9
SPC WW 242042
IAZ000-KSZ000-MOZ000-NEZ000-250300-
URGENT - IMMEDIATE BROADCAST REQUESTED
Tornado Watch Number 309
NWS Storm Prediction Center Norman OK
345 PM CDT Thu Jun 24 2021
The NWS Storm Prediction Center has issued a
* Tornado Watch for portions of
Southwest Iowa
Northeast Kansas
Northwest Missouri
Southeast Nebraska
* Effective this Thursday afternoon and evening from 345 PM until
1000 PM CDT.
* Primary threats include...
A few tornadoes and a couple intense tornadoes possible
Widespread damaging winds and isolated significant gusts to 75
mph likely
Widespread large hail and isolated very large hail events to 3
inches in diameter likely
SUMMARY...Intense thunderstorms are expected to develop along a
boundary over southeast Nebraska. These storms will track
southeastward into northeast Kansas and northwest Missouri during
the late afternoon. Supercells capable of very large hail, damaging
winds, and a few tornadoes are possible.
The tornado watch area is approximately along and 50 statute miles
north and south of a line from 25 miles west northwest of Concordia
KS to 35 miles east of Falls City NE. For a complete depiction of
the watch see the associated watch outline update (WOUS64 KWNS
WOU9).
PRECAUTIONARY/PREPAREDNESS ACTIONS...
REMEMBER...A Tornado Watch means conditions are favorable for
tornadoes and severe thunderstorms in and close to the watch
area. Persons in these areas should be on the lookout for
threatening weather conditions and listen for later statements
and possible warnings.
&&
AVIATION...Tornadoes and a few severe thunderstorms with hail
surface and aloft to 3 inches. Extreme turbulence and surface wind
gusts to 65 knots. A few cumulonimbi with maximum tops to 600. Mean
storm motion vector 29030.
...HartSPC that day
Everything else SPC issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 23, 8:10 PM CDT | Mesoscale Discussion | SPC | Monona, Plymouth, Woodbury | 95 min |
| Jun 23, 10:12 PM CDT | Mesoscale Discussion | SPC | Harrison, Mills, Monona, Pottawattamie | 93 min |
| Jun 23, 10:37 PM CDT | Severe Thunderstorm Watch | SPC | Fremont, Harrison, Mills, Monona, Pottawattamie, Shelby and 1 more | 6 hr |
| Jun 24, 1:36 AM CDT | Mesoscale Discussion | SPC | Adams, Cass, Fremont, Harrison, Mills, Montgomery and 4 more | 114 min |
| Jun 24, 2:20 AM CDT | Severe Thunderstorm Watch | SPC | Adair, Adams, Audubon, Boone, Carroll, Cass and 15 more | 6 hr |
| Jun 24, 5:02 AM CDT | Mesoscale Discussion | SPC | Appanoose, Clarke, Davis, Decatur, Lucas, Madison and 8 more | 118 min |
| Jun 24, 5:30 PM CDT | Mesoscale Discussion | SPC | Fremont, Page | 60 min |
| Jun 24, 6:19 PM CDT | Mesoscale Discussion | SPC | Appanoose, Clarke, Davis, Decatur, Lucas, Monroe and 3 more | 56 min |
| Jun 24, 6:33 PM CDT | Tornado Watch | SPC | Adams, Appanoose, Clarke, Davis, Decatur, Lucas and 6 more | 3 hr |
| Jun 24, 2:45 PM CDT | Mesoscale Discussion | SPC | Atchison, Brown, Douglas, Jackson, Jefferson, Leavenworth and 7 more | 3 hr |
| Jun 24, 2:49 PM CDT | Mesoscale Discussion | SPC | Cheyenne, Logan, Rawlins, Sherman, Thomas, Wallace | 116 min |
| Jun 24, 3:14 PM CDT | Mesoscale Discussion | SPC | Gray, Haskell, Meade, Seward | 91 min |
| Jun 24, 4:56 PM CDT | Severe Thunderstorm Watch | SPC | Cheyenne, Decatur, Finney, Gove, Grant, Gray and 13 more | 6 hr |
| Jun 24, 6:31 PM CDT | Mesoscale Discussion | SPC | Cheyenne, Greeley, Hamilton, Kearny, Lane, Logan and 6 more | 119 min |
Nearby
Tornado Watches in Kansas, 2021Tornado Watches in Nebraska, 2021Tornado Watches in Missouri, 2021Every tornado watch 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.