Alert archive / Kansas / Areal Flood Advisories in 2021

Areal Flood Advisory 64, NWS Topeka, KS

August 13, 2021Douglas County, Franklin County, Kansas

NWS Topeka, KS issued this areal flood advisory at Aug 13, 2021, 6:27 AM CDT for Douglas County, Franklin County, Kansas. It was in force for 2 hr.

The area

The counties it named.

The facts

Issued
Aug 13, 2021, 6:27 AM CDT (11:27 UTC)
Expired
Aug 13, 2021, 8:30 AM CDT
In force
2 hr
Issued by
NWS Topeka, KS
Area
Storm-based polygon

Counties Douglas County, KS, Franklin County, KS

The radar

The Topeka radar (KTWX), 87 km from the middle of the area, began a volume at 11:29 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, 11.5 hours before the alert went out and 43 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 2021-08-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4214 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 2021-08-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 110 square meters per square second.1939Sfc1 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
4214 J/kg
Mixed-layer CIN
-86 J/kg
Mixed-layer LCL
1420 m above ground
0-6 km bulk shear
14 kt
0-1 km storm-relative helicity
110 m²/s²
0-3 km storm-relative helicity
179 m²/s²
Significant tornado parameter
0.0
Supercell composite
6.4

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 Aug 13, 5:43 AM CDT, 44 minutes earlier.

Area forecast discussion, Aug 13, 5:43 AM CDT, 44 minutes before
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Hazardous weather outlook, Aug 13, 3:22 AM CDT, 3 hours 5 minutes before
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In the hours before

Special weather statement, Aug 13, 2:44 AM CDT, 3 hours 43 minutes before
Special Weather Statement
National Weather Service Topeka KS
244 AM CDT Fri Aug 13 2021

KSZ022-023-038-130830-
Wabaunsee-Pottawatomie-Riley-
244 AM CDT Fri Aug 13 2021

...A strong thunderstorm will impact portions of eastern Riley,
northern Wabaunsee and south central Pottawatomie Counties through
330 AM CDT...

At 244 AM CDT, Doppler radar was tracking a strong thunderstorm near
St. George, moving southeast at 20 mph.

HAZARD...Wind gusts of 50 to 55 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...
Wamego, Alma, St. George, Maple Hill, McFarland, Paxico, Belvue and
Louisville.

This includes Interstate 70 between mile markers 321 and 340.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

If outdoors, consider seeking shelter inside a building.

&&

LAT...LON 3922 9653 3932 9634 3908 9598 3896 9633
TIME...MOT...LOC 0744Z 325DEG 17KT 3921 9638

MAX HAIL SIZE...0.25 IN
MAX WIND GUST...55 MPH

Reese
Local storm report, Aug 13, 4:35 AM CDT, 1 hour 52 minutes before
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Local storm report, Aug 13, 4:39 AM CDT, 1 hour 48 minutes before
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Local storm report, Aug 13, 5:15 AM CDT, 1 hour 12 minutes before
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Local storm report, Aug 13, 5:16 AM CDT, 1 hour 11 minutes before
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Local storm report, Aug 13, 5:18 AM CDT, 1 hour 9 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Aug 12, 7:19 PM CDTSevere Thunderstorm WarningTOPCloud, Republic26 min
Aug 12, 7:31 PM CDTSpecial Weather StatementTOPDouglas29 min
Aug 12, 8:58 PM CDTSpecial Weather StatementTOPMorris32 min
Aug 12, 9:06 PM CDTSevere Thunderstorm WarningTOPMorris24 min
Aug 12, 9:29 PM CDTSpecial Weather StatementTOPFranklin31 min
Aug 12, 9:43 PM CDTSpecial Weather StatementTOPDickinson47 min
Aug 12, 9:46 PM CDTSevere Thunderstorm WarningTOPDouglas, Franklin29 min
Aug 12, 10:02 PM CDTSpecial Weather StatementTOPDickinson43 min
Aug 12, 10:18 PM CDTSpecial Weather StatementTOPFranklin42 min
Aug 12, 10:38 PM CDTSevere Thunderstorm WarningTOPDouglas, Franklin37 min
Aug 12, 10:49 PM CDTAreal Flood AdvisoryTOPDouglas, Franklin5 hr
Aug 12, 11:06 PM CDTSevere Thunderstorm WarningTOPDouglas, Franklin24 min
Aug 12, 11:55 PM CDTFlash Flood WarningTOPDouglas, Franklin, Shawnee3 min
Aug 13, 12:01 AM CDTFlash Flood WarningTOPDouglas, Franklin6 hr
Aug 13, 12:11 AM CDTAreal Flood AdvisoryTOPDouglas, Jefferson3 hr
Aug 13, 12:22 AM CDTSevere Thunderstorm WarningTOPBrown, Jackson, Nemaha23 min
Aug 13, 12:43 AM CDTSevere Thunderstorm WarningTOPBrown17 min
Aug 13, 12:55 AM CDTSpecial Weather StatementTOPBrown35 min
Aug 13, 1:19 AM CDTSpecial Weather StatementTOPMarshall41 min
Aug 13, 1:38 AM CDTSpecial Weather StatementTOPDouglas, Jefferson52 min
Aug 13, 1:49 AM CDTAreal Flood AdvisoryTOPBrown, Jackson, Marshall, Nemaha5 hr
Aug 13, 1:56 AM CDTSpecial Weather StatementTOPLyon49 min
Aug 13, 2:07 AM CDTSevere Thunderstorm WarningTOPCoffey, Lyon38 min
Aug 13, 2:10 AM CDTFlash Flood WarningTOPLyon, Osage4 hr
Aug 13, 2:18 AM CDTFlash Flood WarningTOPDouglas, Franklin, Jefferson4 hr
Aug 13, 2:44 AM CDTSpecial Weather StatementTOPWabaunsee46 min
Aug 13, 2:51 AM CDTFlash Flood WarningTOPLyon4 hr
Aug 13, 3:15 AM CDTAreal Flood AdvisoryTOPDouglas, Jefferson, Osage, Shawnee3 hr
Aug 13, 3:51 AM CDTAreal Flood AdvisoryTOPRepublic, Washington3 hr
Aug 13, 6:09 AM CDTAreal Flood AdvisoryTOPLyon, Osage105 min
Aug 13, 6:30 AM CDTAreal Flood AdvisoryTOPDouglas, Franklin, Jefferson2 hr
Aug 13, 6:52 AM CDTAreal Flood AdvisoryTOPLyon53 min
Aug 13, 9:08 AM CDTRiver Flood WarningTOPWashington4 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.