Alert archive / Kansas / Special Weather Statements in 2021
Special Weather Statement, NWS Topeka, KS
NWS Topeka, KS issued this special weather statement at Aug 5, 2021, 4:54 PM CDT for Lyon County, Kansas. It was in force for 36 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 5, 2021, 4:54 PM CDT (21:54 UTC)
- Expired
- Aug 5, 2021, 5:30 PM CDT
- In force
- 36 min
- Issued by
- NWS Topeka, KS
- Hail
- 0.88 in
- Wind
- 40
County Lyon County, KS
The radar
The Topeka radar (KTWX), 34 km from the middle of the area, began a volume at 21:57 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, 9.9 hours before the alert went out and 54 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
- 76 J/kg
- Mixed-layer CIN
- -310 J/kg
- Mixed-layer LCL
- 1558 m above ground
- 0-6 km bulk shear
- 6 kt
- 0-1 km storm-relative helicity
- 149 m²/s²
- 0-3 km storm-relative helicity
- 211 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
522
WWUS83 KTOP 052154
SPSTOP
Special Weather Statement
National Weather Service Topeka KS
454 PM CDT Thu Aug 5 2021
KSZ054-052230-
Lyon-
454 PM CDT Thu Aug 5 2021
...A strong thunderstorm will impact portions of north central Lyon
County through 530 PM CDT...
At 454 PM CDT, Doppler radar was tracking a strong thunderstorm over
Allen, moving northeast at 10 mph.
HAZARD...Winds in excess of 40 mph and nickel 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...
Allen.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
If outdoors, consider seeking shelter inside a building.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
&&
LAT...LON 3871 9621 3874 9613 3874 9606 3868 9602
3863 9615
TIME...MOT...LOC 2154Z 239DEG 7KT 3868 9617
MAX HAIL SIZE...0.88 IN
MAX WIND GUST...40 MPH
$$The office that day
Everything else NWS Topeka, KS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 5, 4:28 PM CDT | Special Weather Statement | TOP | Wabaunsee | 32 min |
| Aug 5, 5:05 PM CDT | Special Weather Statement | TOP | Lyon | 40 min |
| Aug 5, 5:50 PM CDT | Special Weather Statement | TOP | Lyon | 25 min |
| Aug 5, 6:27 PM CDT | Special Weather Statement | TOP | Morris | 48 min |
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.