Alert archive / Kansas / Areal Flood Advisories in 2021

Areal Flood Advisory 71, NWS Topeka, KS

September 3, 2021Geary County, Riley County, Kansas

NWS Topeka, KS issued this areal flood advisory at Sep 3, 2021, 4:34 AM CDT for Geary County, Riley County, Kansas. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued
Sep 3, 2021, 4:34 AM CDT (09:34 UTC)
Expired
Sep 3, 2021, 7:30 AM CDT
In force
3 hr
Issued by
NWS Topeka, KS
Area
Storm-based polygon

Counties Geary County, KS, Riley County, KS

The radar

The Topeka radar (KTWX), 47 km from the middle of the area, began a volume at 09:34 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, 9.6 hours before the alert went out and 97 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 2021-09-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 155 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 2021-09-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 212 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
155 J/kg
Mixed-layer CIN
-177 J/kg
Mixed-layer LCL
1035 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
212 m²/s²
0-3 km storm-relative helicity
268 m²/s²
Significant tornado parameter
0.0
Supercell composite
3.8

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this areal flood advisory went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Topeka, KS wrote its last area forecast discussion before this areal flood advisory went out at Sep 3, 4:04 AM CDT, 30 minutes earlier.

Area forecast discussion, Sep 3, 4:04 AM CDT, 30 minutes before
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Hazardous weather outlook, Sep 3, 4:09 AM CDT, 25 minutes before
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In the hours before

Special weather statement, Sep 3, 12:01 AM CDT, 4 hours 33 minutes before
Special Weather Statement
National Weather Service Topeka KS
1201 AM CDT Fri Sep 3 2021

KSZ054-055-030530-
Lyon-Osage-
1201 AM CDT Fri Sep 3 2021

...A strong thunderstorm will impact portions of west central Osage
and northeastern Lyon Counties through 1230 AM CDT...

At 1201 AM CDT, Doppler radar was tracking a strong thunderstorm near
Admire, moving northeast at 20 mph.

HAZARD...Wind gusts up to 50 mph and penny 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...
Osage City and Admire.

This includes Kansas Turnpike between mile markers 139 and 154.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3860 9617 3874 9598 3874 9595 3860 9582
      3852 9609
TIME...MOT...LOC 0501Z 239DEG 19KT 3859 9608

MAX HAIL SIZE...0.75 IN
MAX WIND GUST...50 MPH

Baerg
Special weather statement, Sep 3, 12:31 AM CDT, 4 hours 3 minutes before
Special Weather Statement
National Weather Service Topeka KS
1231 AM CDT Fri Sep 3 2021

KSZ054-055-030600-
Lyon-Osage-
1231 AM CDT Fri Sep 3 2021

...A strong thunderstorm will impact portions of central Osage and
northeastern Lyon Counties through 100 AM CDT...

At 1231 AM CDT, Doppler radar was tracking a strong thunderstorm near
Osage City, moving northeast at 25 mph.

HAZARD...Wind gusts up to 50 mph and half inch 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...
Osage City, Carbondale, Burlingame, Scranton and Pomona Lake.

This includes Kansas Turnpike between mile markers 151 and 155.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3857 9592 3872 9602 3874 9597 3874 9595
      3875 9595 3884 9570 3865 9555
TIME...MOT...LOC 0531Z 243DEG 21KT 3866 9588

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...50 MPH

Laflin
Special weather statement, Sep 3, 12:57 AM CDT, 3 hours 37 minutes before
Special Weather Statement
National Weather Service Topeka KS
1257 AM CDT Fri Sep 3 2021

KSZ055-030630-
Osage-
1257 AM CDT Fri Sep 3 2021

...A strong thunderstorm will impact portions of northern Osage
County through 130 AM CDT...

At 1257 AM CDT, Doppler radar was tracking a strong thunderstorm over
Burlingame, moving northeast at 20 mph.

HAZARD...Winds in excess of 40 mph and half inch 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...
Carbondale, Overbrook, Burlingame and Scranton.

This includes Kansas Turnpike between mile markers 157 and 160.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3868 9587 3878 9595 3879 9594 3887 9577
      3887 9561 3875 9555
TIME...MOT...LOC 0557Z 242DEG 19KT 3874 9585

MAX HAIL SIZE...0.50 IN
MAX WIND GUST...40 MPH

Laflin
Special weather statement, Sep 3, 1:29 AM CDT, 3 hours 5 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Sep 2, 7:18 PM CDTSevere Thunderstorm WarningTOPGeary, Morris, Wabaunsee27 min
Sep 2, 7:44 PM CDTSevere Thunderstorm WarningTOPLyon, Morris, Wabaunsee31 min
Sep 2, 8:16 PM CDTSpecial Weather StatementTOPLyon29 min
Sep 2, 8:41 PM CDTSpecial Weather StatementTOPMarshall34 min
Sep 2, 8:41 PM CDTSevere Thunderstorm WarningTOPLyon34 min
Sep 2, 9:11 PM CDTSevere Thunderstorm WarningTOPLyon34 min
Sep 2, 9:19 PM CDTSpecial Weather StatementTOPGeary26 min
Sep 2, 9:43 PM CDTSpecial Weather StatementTOPMorris32 min
Sep 3, 12:01 AM CDTSpecial Weather StatementTOPLyon29 min
Sep 3, 12:09 AM CDTRiver Flood WarningTOPMarshall10 hr
Sep 3, 12:17 AM CDTAreal Flood AdvisoryTOPLyon, Osage7 hr
Sep 3, 12:31 AM CDTSpecial Weather StatementTOPOsage29 min
Sep 3, 12:57 AM CDTSpecial Weather StatementTOPOsage33 min
Sep 3, 1:29 AM CDTSpecial Weather StatementTOPShawnee46 min
Sep 3, 1:41 AM CDTAreal Flood AdvisoryTOPLyon, Osage, Shawnee, Wabaunsee6 hr
Sep 3, 3:34 AM CDTFlash Flood WatchTOPAnderson, Coffey, Dickinson, Douglas, Franklin, Geary and 5 more33 hr
Sep 3, 5:21 AM CDTFlash Flood WarningTOPDouglas3 hr

Nearby

Areal Flood Advisories in Kansas, 2021Every areal flood advisory 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.