Alert archive / Kansas / Special Weather Statements in 2021
Special Weather Statement, NWS Topeka, KS
NWS Topeka, KS issued this special weather statement at Aug 7, 2021, 11:28 PM CDT for 9 counties in Kansas. It was in force for 32 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 7, 2021, 11:28 PM CDT (04:28 UTC)
- Expired
- Aug 8, 2021, 12:00 AM CDT
- In force
- 32 min
- Issued by
- NWS Topeka, KS
- Hail
- 0.25 in
- Wind
- 40
Counties Brown County, KS, Douglas County, KS, Jackson County, KS, Jefferson County, KS, Lyon County, KS, Morris County, KS, Osage County, KS, Shawnee County, KS, Wabaunsee County, KS
The radar
The Topeka radar (KTWX), 47 km from the middle of the area, began a volume at 04:28 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 00:00Z, 4.5 hours before the alert went out and 7 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
- 1803 J/kg
- Mixed-layer CIN
- -63 J/kg
- Mixed-layer LCL
- 1923 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 60 m²/s²
- 0-3 km storm-relative helicity
- 157 m²/s²
- Significant tornado parameter
- 0.1
- Supercell composite
- 7.5
The text
As transmitted.
254
WWUS83 KTOP 080428
SPSTOP
Special Weather Statement
National Weather Service Topeka KS
1128 PM CDT Sat Aug 7 2021
KSZ012-024-026-037>040-054>056-058-080500-
Coffey-Wabaunsee-Shawnee-Lyon-Jefferson-Douglas-Brown-Franklin-
Jackson-Osage-Morris-
1128 PM CDT Sat Aug 7 2021
...Strong thunderstorms will impact portions of northwestern
Franklin, Jefferson, southeastern Morris, Shawnee, southeastern
Wabaunsee, Douglas, Osage, Jackson, northwestern Coffey, Brown and
Lyon Counties through MIDNIGHT CDT...
At 1125 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 6 miles east of Reserve to 4 miles south of
Tecumseh to 9 miles west of Olpe. Movement was east at 35 mph. The
strongest wind gust will be associated with an outflow boundary about
10 miles ahead of the line of thunderstorms.
HAZARD...Winds of 40 to 50 mph and pea size hail.
SOURCE...Radar indicated.
IMPACT...Gusty winds could knock down tree limbs and blow around
unsecured objects. Minor damage to outdoor objects is
possible.
Locations impacted include...
Topeka, Lawrence, Emporia, Baldwin City, Holton, Hiawatha, Osage
City, Sabetha, Council Grove, Horton, Carbondale, Valley Falls,
Rossville, Oskaloosa, Eskridge, Tecumseh, Eudora, Richland, Dover and
Silver Lake.
This includes the following highways...
Interstate 35 between mile markers 128 and 172.
Interstate 70 between mile markers 338 and 355.
Kansas Turnpike between mile markers 117 and 205.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
A Severe Thunderstorm Watch remains in effect until 100 AM CDT for
northeastern and east central Kansas.
&&
LAT...LON 3881 9506 3808 9596 3817 9596 3817 9636
3852 9635 3852 9693 3907 9609 3914 9604
3913 9604 3957 9579 4000 9579 4000 9534
3965 9534 3965 9556 3942 9557 3942 9518
3897 9519 3895 9509 3899 9506
TIME...MOT...LOC 0425Z 277DEG 30KT 4000 9544 3898 9556 3826 9635
MAX HAIL SIZE...0.25 IN
MAX WIND GUST...40 MPH
$$
GarganThe office that day
Everything else NWS Topeka, KS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 7, 8:19 PM CDT | Severe Thunderstorm Warning | TOP | Cloud, Republic | 41 min |
| Aug 7, 8:26 PM CDT | Special Weather Statement | TOP | Cloud, Ottawa | 49 min |
| Aug 7, 8:42 PM CDT | Severe Thunderstorm Warning | TOP | Cloud, Ottawa | 33 min |
| Aug 7, 8:56 PM CDT | Severe Thunderstorm Warning | TOP | Clay, Riley, Washington | 49 min |
| Aug 7, 9:08 PM CDT | Severe Thunderstorm Warning | TOP | Clay, Dickinson, Geary, Morris, Ottawa, Riley | 52 min |
| Aug 7, 9:41 PM CDT | Severe Thunderstorm Warning | TOP | Clay, Marshall, Pottawatomie, Riley, Washington | 49 min |
| Aug 7, 9:49 PM CDT | Severe Thunderstorm Warning | TOP | Geary, Lyon, Morris, Pottawatomie, Riley, Wabaunsee | 41 min |
| Aug 7, 10:28 PM CDT | Special Weather Statement | TOP | Morris, Wabaunsee | 32 min |
| Aug 7, 10:29 PM CDT | Special Weather Statement | TOP | Nemaha | 31 min |
| Aug 7, 10:56 PM CDT | Special Weather Statement | TOP | Jackson, Shawnee | 34 min |
| Aug 8, 12:00 AM CDT | Special Weather Statement | TOP | Anderson, Coffey, Douglas, Franklin, Lyon, Osage | 30 min |
| Aug 8, 2:27 PM CDT | Heat Advisory | TOP | Anderson, Brown, Clay, Cloud, Coffey, Dickinson and 17 more | 4 days |
Nearby
Special Weather Statements in Kansas, 2021Every special weather statement 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.