Alert archive / Kansas / Special Weather Statements in 2021

Special Weather Statement, NWS Topeka, KS

May 25, 2021Riley County, Kansas

NWS Topeka, KS issued this special weather statement at May 25, 2021, 7:21 PM CDT for Riley County, Kansas. It was in force for 24 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
May 25, 2021, 7:21 PM CDT (00:21 UTC)
Expired
May 25, 2021, 7:45 PM CDT
In force
24 min
Issued by
NWS Topeka, KS

County Riley County, KS

The radar

The Topeka radar (KTWX), 76 km from the middle of the area, began a volume at 00:22 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, 0.4 hours before the alert went out and 112 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.

Skew-T log-pSkew-T log-p diagram, Topeka, KS at 00:00Z on 2021-05-26Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1016 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Topeka, KS at 00:00Z on 2021-05-26The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 79 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
1016 J/kg
Mixed-layer CIN
-27 J/kg
Mixed-layer LCL
872 m above ground
0-6 km bulk shear
31 kt
0-1 km storm-relative helicity
79 m²/s²
0-3 km storm-relative helicity
113 m²/s²
Significant tornado parameter
0.3
Supercell composite
2.4

Open this sounding in Storm Lab

The text

As transmitted.

693 
WWUS83 KTOP 260021
SPSTOP

Special Weather Statement
National Weather Service Topeka KS
721 PM CDT Tue May 25 2021
 
KSZ010-022-023-260045-
Pottawatomie-Riley-Marshall-
721 PM CDT Tue May 25 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN RILEY...NORTHWESTERN
POTTAWATOMIE AND SOUTHWESTERN MARSHALL COUNTIES UNTIL 745 PM CDT...

At 721 PM CDT, Doppler radar was tracking a strong thunderstorm 9
miles south of Waterville, moving east at 15 mph.

Nickel size hail and wind gusts up to 50 mph will be possible with
this storm.

Locations impacted include...
Olsburg.

LAT...LON 3963 9650 3942 9656 3947 9694 3957 9685
      3957 9681 3961 9681 3963 9679
TIME...MOT...LOC 0021Z 279DEG 14KT 3956 9680 

$$

Teefey

The office that day

Everything else NWS Topeka, KS issued on the same UTC day.

IssuedProductOfficeCountiesLasted
May 25, 7:01 PM CDTSpecial Weather StatementTOPCloud29 min
May 25, 7:04 PM CDTAreal Flood AdvisoryTOPCloud3 hr
May 25, 7:44 PM CDTAreal Flood AdvisoryTOPMarshall3 hr
May 25, 7:58 PM CDTSpecial Weather StatementTOPRiley32 min
May 25, 8:02 PM CDTSevere Thunderstorm WarningTOPPottawatomie, Riley43 min
May 25, 8:36 PM CDTSpecial Weather StatementTOPBrown24 min
May 26, 3:10 AM CDTFlash Flood WatchTOPBrown, Clay, Cloud, Dickinson, Douglas, Franklin and 14 more31 hr
May 26, 5:59 PM CDTSpecial Weather StatementTOPOttawa31 min
May 26, 6:51 PM CDTSpecial Weather StatementTOPClay, Cloud54 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.