Alert archive / Kansas / Areal Flood Advisories in 2021

Areal Flood Advisory 5, NWS Topeka, KS

April 7, 2021Coffey County, Lyon County, Kansas

NWS Topeka, KS issued this areal flood advisory at Apr 7, 2021, 3:44 AM CDT for Coffey County, Lyon County, Kansas. It was in force for 3 hr.

The area

The counties it named.

The facts

Issued: Apr 7, 2021, 3:44 AM CDT (08:44 UTC)
Expired: Apr 7, 2021, 6:45 AM CDT
In force: 3 hr
Issued by: NWS Topeka, KS
Area: Storm-based polygon

Counties Coffey County, KS, Lyon County, KS

The radar

The Topeka radar (KTWX), 77 km from the middle of the area, began a volume at 08:46 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, 8.7 hours before the alert went out and 77 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 342 J/kg
Mixed-layer CIN: -206 J/kg
Mixed-layer LCL: 1225 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 67 m²/s²
0-3 km storm-relative helicity: 186 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

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 Apr 7, 12:32 AM CDT, 3 hours 12 minutes earlier.

Area forecast discussion, Apr 7, 12:32 AM CDT, 3 hours 12 minutes before

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Hazardous weather outlook, Apr 7, 1:59 AM CDT, 1 hour 45 minutes before

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    <section class="card" role="status" aria-live="polite">
      <div class="status" id="status">Temporary Notice</div>
      <h1 id="headline">This service is currently unavailable.</h1>
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        The site you requested is temporarily down for maintenance or an unexpected outage.
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        Please try again in a few minutes.
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        If you are an administrator, restore upstream service and remove the redirect/fallback rule when normal operations resume.
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In the hours before

Special weather statement, Apr 6, 9:44 PM CDT, 6 hours before

Special Weather Statement
National Weather Service Topeka KS
944 PM CDT Tue Apr 6 2021

KSZ034-070315-
Ottawa-
944 PM CDT Tue Apr 6 2021

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL OTTAWA COUNTY UNTIL 1015
PM CDT...

At 944 PM CDT, Doppler radar was tracking a strong thunderstorm near
Bennington, moving northeast at 35 mph.

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

Locations impacted include...
Minneapolis, Bennington and Wells.

A Severe Thunderstorm Watch remains in effect until 200 AM CDT for
central and north central Kansas.

LAT...LON 3925 9762 3922 9737 3907 9737 3896 9755
      3896 9772 3904 9781
TIME...MOT...LOC 0244Z 226DEG 30KT 3903 9765

Flanagan/Baerg

Special weather statement, Apr 6, 10:02 PM CDT, 5 hours 42 minutes before

Special Weather Statement
National Weather Service Topeka KS
1002 PM CDT Tue Apr 6 2021

KSZ020>022-034>036-070345-
Geary-Clay-Cloud-Dickinson-Riley-Ottawa-
1002 PM CDT Tue Apr 6 2021

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN DICKINSON...NORTHWESTERN
GEARY...NORTHWESTERN RILEY...EASTERN OTTAWA...CLAY AND SOUTHEASTERN
CLOUD COUNTIES UNTIL 1045 PM CDT...

At 1001 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from near Oak Hill to 3 miles southwest of
Manchester to 3 miles north of New Cambria. Movement was northeast at
45 mph.

Pea size hail and wind gusts up to 50 mph will be possible with these
storms.

Locations impacted include...
Clay Center, Solomon, Wakefield, Miltonvale, Milford, Leonardville,
Morganville, Green, Manchester, Longford, Oak Hill, Niles, Talmage,
Idana, Milford Lake and Moonlight.

This includes Interstate 70 between mile markers 267 and 270.

A Severe Thunderstorm Watch remains in effect until 200 AM CDT for
central, north central, northeastern and east central Kansas.

LAT...LON 3900 9746 3956 9749 3957 9679 3925 9686
      3904 9689 3891 9737 3892 9738 3896 9737
      3896 9751
TIME...MOT...LOC 0301Z 241DEG 39KT 3925 9731 3905 9736 3893 9751

Flanagan/Baerg

Special weather statement, Apr 6, 10:28 PM CDT, 5 hours 16 minutes before

Special Weather Statement
National Weather Service Topeka KS
1028 PM CDT Tue Apr 6 2021

KSZ022-023-035>038-070415-
Wabaunsee-Geary-Pottawatomie-Dickinson-Riley-Morris-
1028 PM CDT Tue Apr 6 2021

...SIGNIFICANT WEATHER ADVISORY FOR DICKINSON...GEARY...RILEY...
WESTERN MORRIS...WEST CENTRAL WABAUNSEE AND WESTERN POTTAWATOMIE
COUNTIES UNTIL 1115 PM CDT...

At 1028 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 6 miles north of Green to 3 miles northwest of
Junction City to 5 miles west of Hope. Movement was east at 40 mph.

Wind gusts up to 50 mph will be possible with these storms.

Locations impacted include...
Manhattan, Junction City, Abilene, Herington, Ogden, Grandview Plaza,
Chapman, Riley, Enterprise, St. George, White City, Milford,
Leonardville, Hope, Dwight, Olsburg, Woodbine, Randolph, Wilsey and
Parkerville.

This includes Interstate 70 between mile markers 271 and 321.

A Severe Thunderstorm Watch remains in effect until 200 AM CDT for
central, north central, northeastern and east central Kansas.

LAT...LON 3891 9737 3902 9696 3913 9700 3914 9696
      3957 9696 3956 9650 3904 9639 3852 9675
      3853 9693 3861 9693 3861 9737
TIME...MOT...LOC 0328Z 275DEG 35KT 3952 9701 3907 9687 3866 9717

Flanagan/Baerg

Special weather statement, Apr 6, 11:19 PM CDT, 4 hours 25 minutes before

Special Weather Statement
National Weather Service Topeka KS
1119 PM CDT Tue Apr 6 2021

KSZ022-023-037-038-054-070500-
Wabaunsee-Lyon-Pottawatomie-Riley-Morris-
1119 PM CDT Tue Apr 6 2021

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN RILEY...NORTHEASTERN
MORRIS...WABAUNSEE...EASTERN POTTAWATOMIE AND NORTHERN LYON COUNTIES
UNTIL MIDNIGHT CDT...

At 1118 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from Westmoreland to 4 miles northwest of Alma to 6
miles northeast of Council Grove Lake. Movement was east at 35 mph.

Wind gusts up to 50 mph will be possible with these storms.

Locations impacted include...
Wamego, Alma, Westmoreland, Eskridge, St. Marys, St. George, Maple
Hill, Alta Vista, McFarland, Harveyville, Paxico, Belvue, Emmett,
Louisville, Allen, Admire, Bushong, Keene, Council Grove Lake and
Volland.

This includes the following highways...
 Interstate 70 between mile markers 320 and 345.
 Kansas Turnpike between mile markers 144 and 154.

A Severe Thunderstorm Watch remains in effect until 200 AM CDT for
northeastern and east central Kansas.

LAT...LON 3913 9604 3913 9599 3911 9600 3910 9595
      3859 9595 3869 9655 3907 9643 3947 9651
      3948 9604
TIME...MOT...LOC 0418Z 274DEG 29KT 3940 9642 3907 9635 3876 9646

Baerg

Special weather statement, Apr 6, 11:32 PM CDT, 4 hours 12 minutes before

Special Weather Statement
National Weather Service Topeka KS
1132 PM CDT Tue Apr 6 2021

KSZ024-039-055-070530-
Shawnee-Jackson-Osage-
1132 PM CDT Tue Apr 6 2021

...SIGNIFICANT WEATHER ADVISORY FOR SHAWNEE...NORTHERN OSAGE AND
JACKSON COUNTIES UNTIL 1230 AM CDT...

At 1131 PM CDT, Doppler radar was tracking strong thunderstorms along
a line extending from 8 miles southwest of Onaga to near Paxico to 8
miles north of Bushong. Movement was east at 40 mph.

Wind gusts up to 50 mph will be possible with these storms.

Locations impacted include...
Topeka, Holton, Osage City, Carbondale, Rossville, Tecumseh,
Richland, Dover, Silver Lake, Auburn, Overbrook, Lyndon, Burlingame,
Scranton, Hoyt, Mayetta, Denison, Delia, Willard and Pauline.

This includes the following highways...
 Interstate 70 between mile markers 346 and 355.
 Kansas Turnpike between mile markers 155 and 188.

A Severe Thunderstorm Watch remains in effect until 200 AM CDT for
northeastern and east central Kansas.

LAT...LON 3855 9569 3859 9595 3910 9595 3912 9601
      3913 9599 3913 9604 3946 9603 3946 9558
      3907 9560 3905 9558 3907 9555 3905 9550
      3888 9550
TIME...MOT...LOC 0431Z 273DEG 33KT 3939 9626 3906 9619 3876 9629

Baerg

The office that day

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

Issued	Product	Office	Counties	Lasted
Apr 6, 8:41 PM CDT	Severe Thunderstorm Warning	TOP	Ottawa	46 min
Apr 6, 9:40 PM CDT	Special Weather Statement	TOP	Republic	35 min
Apr 6, 9:44 PM CDT	Special Weather Statement	TOP	Ottawa	31 min
Apr 6, 10:02 PM CDT	Special Weather Statement	TOP	Clay	43 min
Apr 6, 10:28 PM CDT	Special Weather Statement	TOP	Dickinson, Geary, Morris, Riley	47 min
Apr 6, 11:19 PM CDT	Special Weather Statement	TOP	Pottawatomie, Wabaunsee	41 min
Apr 6, 11:32 PM CDT	Special Weather Statement	TOP	Jackson, Osage, Shawnee	58 min
Apr 6, 11:38 PM CDT	Areal Flood Advisory	TOP	Dickinson	3 hr
Apr 6, 11:54 PM CDT	Areal Flood Advisory	TOP	Morris	3 hr

Nearby

Areal Flood Advisories in Kansas, 2021 Every 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.