Alert archive / Kansas / Flash Flood Watches in 2019

Flash Flood Watch 1, NWS Topeka, KS

April 29, 201911 counties in Kansas

NWS Topeka, KS issued this flash flood watch at Apr 29, 2019, 4:20 AM CDT for 11 counties in Kansas. It took effect at Apr 30, 2019, 1:00 AM CDT. It was in force for 54 hr.

The area

The counties it named.

The facts

Issued
Apr 29, 2019, 4:20 AM CDT (09:20 UTC)
In effect from
Apr 30, 2019, 1:00 AM CDT
Expired
May 2, 2019, 7:00 AM CDT
In force
54 hr
Issued by
NWS Topeka, KS
Flood severity
None

Counties Anderson County, KS, Coffey County, KS, Douglas County, KS, Franklin County, KS, Jackson County, KS, Jefferson County, KS, Lyon County, KS, Morris County, KS, Osage County, KS, Shawnee County, KS, Wabaunsee County, KS

The radar

The Topeka radar (KTWX), 49 km from the middle of the area, began a volume at 09:19 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 (KFOE), launched 00:00Z, 9.3 hours before the alert went out and 29 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 2019-04-29Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2019-04-29The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 538 square meters per square second.19395878Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1217 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
538 m²/s²
0-3 km storm-relative helicity
653 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.7

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this flash flood watch 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 flash flood watch went out at Apr 29, 3:50 AM CDT, 30 minutes earlier.

Area forecast discussion, Apr 29, 3:50 AM CDT, 30 minutes before
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Hazardous weather outlook, Apr 28, 9:10 PM CDT, 7 hours 10 minutes before
Hazardous Weather Outlook
National Weather Service Topeka KS
910 PM CDT Sun Apr 28 2019

KSZ008>012-020>024-026-034>040-054>056-058-059-300215-
Republic-Washington-Marshall-Nemaha-Brown-Cloud-Clay-Riley-
Pottawatomie-Jackson-Jefferson-Ottawa-Dickinson-Geary-Morris-
Wabaunsee-Shawnee-Douglas-Lyon-Osage-Franklin-Coffey-Anderson-
910 PM CDT Sun Apr 28 2019

This hazardous weather outlook is for east central...north
central and northeast Kansas.

.DAY ONE...Tonight.

Thunderstorms are expected to track into central Kansas late this
evening, becoming more widespread in coverage as these
thunderstorms progress eastward across the outlook area through
the overnight hours. Some of these storms may be severe into the
overnight hours with large hail up to the size of golfballs and
damaging wind gusts around 60 mph being the primary hazards.
However, cannot rule out the potential for an isolated tornado or
two. Locally heavy rainfall is expected as multiple rounds of
thunderstorms may impact the area, which could potentially cause
some flash flooding. A Flood Watch remains in effect for
portions of north central, northeast, and east central Kansas
through Monday morning.

.DAYS TWO THROUGH SEVEN...Monday through Saturday.

Severe thunderstorms are possible on Tuesday afternoon. Locally
heavy rainfall, large hail, and damaging winds are the main
hazards.

Localized flash flooding and river rises will also be possible
early and midweek in response to multiple rounds of rain and
thunderstorms through Wednesday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation will not be needed through tonight.

&&

More detailed information can be accessed at...
http://www.weather.gov/top/sitrep

In the hours before

Special weather statement, Apr 29, 1:47 AM CDT, 2 hours 33 minutes before
Special Weather Statement
National Weather Service Topeka KS
147 AM CDT Mon Apr 29 2019

KSZ037-054-290715-
Lyon-Morris-
147 AM CDT Mon Apr 29 2019

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN MORRIS AND CENTRAL
LYON COUNTIES UNTIL 215 AM CDT...

At 146 AM CDT, Doppler radar was tracking a strong thunderstorm 7
miles northeast of Strong City, moving east at 50 mph.

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

This strong thunderstorm will be near...
  Emporia and Americus around 200 AM CDT.

This includes the following highways...
 Interstate 35 between mile markers 128 and 139.
 Kansas Turnpike between mile markers 122 and 146.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Torrential rainfall is also occurring with this storm, and may lead
to localized flooding. Do not drive your vehicle through flooded
roadways.

This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.

&&

A Severe Thunderstorm Watch remains in effect until 300 AM CDT for
east central Kansas.

LAT...LON 3852 9635 3852 9655 3860 9657 3868 9603
      3835 9601 3835 9636
TIME...MOT...LOC 0646Z 267DEG 43KT 3845 9642

Skow
Special weather statement, Apr 29, 1:57 AM CDT, 2 hours 23 minutes before
Special Weather Statement
National Weather Service Topeka KS
157 AM CDT Mon Apr 29 2019

KSZ026-038>040-290730-
Wabaunsee-Shawnee-Jefferson-Douglas-
157 AM CDT Mon Apr 29 2019

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHWESTERN JEFFERSON...
SHAWNEE...EAST CENTRAL WABAUNSEE AND NORTHWESTERN DOUGLAS COUNTIES
UNTIL 230 AM CDT...

At 157 AM CDT, Doppler radar was tracking a strong thunderstorm near
Dover, moving east at 40 mph.

Wind gusts up to 50 mph will be possible with this storm.

This strong thunderstorm will be near...
  Auburn around 205 AM CDT.
  Pauline and Berryton around 215 AM CDT.
  Topeka around 220 AM CDT.
  Tecumseh and Grantville around 225 AM CDT.
  Perry, Lecompton and Clinton Lake around 230 AM CDT.

This includes the following highways...
 Interstate 70 between mile markers 344 and 355.
 Kansas Turnpike between mile markers 167 and 195.

A Severe Thunderstorm Watch remains in effect until 300 AM CDT for
east central Kansas.

LAT...LON 3888 9598 3906 9600 3915 9540 3888 9537
TIME...MOT...LOC 0657Z 264DEG 36KT 3898 9590

Skow
Special weather statement, Apr 29, 2:49 AM CDT, 1 hour 31 minutes before
Special Weather Statement
National Weather Service Topeka KS
249 AM CDT Mon Apr 29 2019

KSZ055-056-058-059-290815-
Coffey-Franklin-Osage-Anderson-
249 AM CDT Mon Apr 29 2019

...SIGNIFICANT WEATHER ADVISORY FOR FRANKLIN...NORTHWESTERN
ANDERSON...SOUTHEASTERN OSAGE AND NORTHEASTERN COFFEY COUNTIES UNTIL
315 AM CDT...

At 247 AM CDT, Doppler radar was tracking a strong thunderstorm over
Beto Junction, moving east at 35 mph.

Wind gusts of 50 to 55 mph will be possible with this storm. The
environment remains favorable for a short-lived tornado, though a
tornado does not appear imminent. Please monitor weather conditions
for any updates over the next hour.

This strong thunderstorm will be near...
  Waverly around 255 AM CDT.
  Melvern around 300 AM CDT.
  Williamsburg and Quenemo around 310 AM CDT.
  Pomona around 315 AM CDT.

This includes Interstate 35 between mile markers 151 and 193.

A Severe Thunderstorm Watch remains in effect until 600 AM CDT for
east central Kansas.

LAT...LON 3833 9579 3850 9584 3871 9517 3850 9506
      3841 9507
TIME...MOT...LOC 0747Z 252DEG 31KT 3844 9572

Skow
Special weather statement, Apr 29, 3:08 AM CDT, 1 hour 12 minutes before
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Local storm report, Apr 29, 3:28 AM CDT, 52 minutes before
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Local storm report, Apr 29, 4:07 AM CDT, 13 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Apr 29, 12:00 AM CDTSpecial Weather StatementTOPDickinson45 min
Apr 29, 12:26 AM CDTSevere Thunderstorm WarningTOPDickinson, Geary, Morris36 min
Apr 29, 12:56 AM CDTSevere Thunderstorm WarningTOPGeary, Morris, Pottawatomie, Riley, Wabaunsee25 min
Apr 29, 1:13 AM CDTSpecial Weather StatementTOPMorris32 min
Apr 29, 1:40 AM CDTSpecial Weather StatementTOPWabaunsee35 min
Apr 29, 1:47 AM CDTSpecial Weather StatementTOPLyon28 min
Apr 29, 1:57 AM CDTSpecial Weather StatementTOPShawnee33 min
Apr 29, 2:17 AM CDTTornado WarningTOPCoffey, Lyon, Osage28 min
Apr 29, 2:49 AM CDTSpecial Weather StatementTOPFranklin26 min
Apr 29, 3:08 AM CDTSpecial Weather StatementTOPAnderson, Coffey52 min
Apr 29, 3:14 AM CDTSevere Thunderstorm WarningTOPAnderson, Coffey46 min
Apr 29, 3:29 AM CDTSevere Thunderstorm WarningTOPAnderson, Coffey, Franklin, Osage31 min
Apr 29, 3:42 AM CDTTornado WarningTOPAnderson, Franklin20 min

Nearby

Flash Flood Watches in Kansas, 2019Every flash flood watch in 2019

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.