Alert archive / Kansas / Flash Flood Warnings in 2021

Flash Flood Warning 4, NWS Topeka, KS

May 16, 2021Cloud County, Kansas

NWS Topeka, KS issued this flash flood warning at May 16, 2021, 4:22 PM CDT for Cloud County, Kansas. It was in force for 2 hr. 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 16, 2021, 4:22 PM CDT (21:22 UTC)
Expired
May 16, 2021, 6:46 PM CDT
In force
2 hr
Issued by
NWS Topeka, KS
Area
Storm-based polygon
Flood severity
None

County Cloud County, KS

The radar

The Grand Island radar (KUEX), 103 km from the middle of the area, began a volume at 21:24 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

Omaha, NE (KOAX), launched 12:00Z, 9.4 hours before the alert went out and 225 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, Omaha, NE at 12:00Z on 2021-05-16Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 9 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, Omaha, NE at 12:00Z on 2021-05-16The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -64 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
9 J/kg
Mixed-layer CIN
-124 J/kg
Mixed-layer LCL
924 m above ground
0-6 km bulk shear
28 kt
0-1 km storm-relative helicity
-64 m²/s²
0-3 km storm-relative helicity
-33 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted.

588 
WGUS53 KTOP 162122
FFWTOP
KSC029-170130-
/O.NEW.KTOP.FF.W.0004.210516T2122Z-210517T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Topeka KS
422 PM CDT Sun May 16 2021

The National Weather Service in Topeka has issued a

* Flash Flood Warning for...
  Northwestern Cloud County in north central Kansas...

* Until 830 PM CDT.

* At 422 PM CDT, Doppler radar indicated thunderstorms producing 
  heavy rain across the warned area. Between 2 and 3 inches of rain 
  have fallen. Flash flooding is ongoing or expected to begin 
  shortly.

  HAZARD...Flash flooding caused by thunderstorms.

  SOURCE...Doppler radar.

  IMPACT...Flooding of small creeks and streams, urban areas,
           highways, streets and underpasses as well as other
           drainage and low lying areas.

* Some locations that will experience flash flooding include...
  Concordia and Jamestown.

Additional rainfall amounts of 1 to 3 inches are possible in the 
warned area.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Excessive runoff from heavy rainfall will cause flooding of small 
creeks and streams, urban areas, highways, streets and underpasses 
as well as other drainage areas and low lying spots.

&&

LAT...LON 3963 9787 3951 9787 3947 9753 3961 9749
      3961 9766

FLASH FLOOD...RADAR INDICATED

$$

Skow
2 follow-up statements
012 
WGUS73 KTOP 162315
FFSTOP

Flash Flood Statement
National Weather Service Topeka KS
615 PM CDT Sun May 16 2021

KSC029-170130-
/O.CON.KTOP.FF.W.0004.000000T0000Z-210517T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cloud KS-
615 PM CDT Sun May 16 2021

...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 830 PM CDT THIS 
EVENING FOR NORTHWESTERN CLOUD COUNTY...

At 613 PM CDT, Doppler radar indicated that a narrow swath of heavy 
rain fell across the warned area with amounts between 2 and 3 
inches. Flash flooding is ongoing or expected to begin shortly.

HAZARD...Flash flooding caused by heavy rain.

SOURCE...Doppler radar.

IMPACT...Flooding of small creeks and streams, urban areas,
         highways, streets and underpasses as well as other
         drainage and low lying areas.

Some locations that will experience flash flooding include...
  Concordia.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

Turn around, don't drown when encountering flooded roads. Most flood 
deaths occur in vehicles.

Excessive runoff from heavy rainfall will cause flooding of small 
creeks and streams, country roads, farmland, and other low lying 
spots.

&&

LAT...LON 3961 9784 3952 9786 3953 9761 3961 9749
      3961 9766

FLASH FLOOD...RADAR INDICATED

$$

Skow
022 
WGUS73 KTOP 162346
FFSTOP

Flash Flood Statement
National Weather Service Topeka KS
646 PM CDT Sun May 16 2021

KSC029-162356-
/O.CAN.KTOP.FF.W.0004.000000T0000Z-210517T0130Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cloud KS-
646 PM CDT Sun May 16 2021

...FLASH FLOOD WARNING IS CANCELLED FOR NORTHWESTERN CLOUD COUNTY...

Flood waters have receded and the heavy rain has ended. Flooding is 
no longer expected to pose a threat. Please continue to heed 
remaining road closures.

LAT...LON 3961 9784 3952 9786 3953 9761 3961 9749
      3961 9766

$$

Skow

The office that day

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

IssuedProductOfficeCountiesLasted
May 16, 12:26 AM CDTSpecial Weather StatementTOPDickinson34 min
May 16, 12:35 AM CDTSpecial Weather StatementTOPOttawa25 min
May 16, 1:05 AM CDTSpecial Weather StatementTOPLyon25 min
May 16, 1:08 AM CDTSpecial Weather StatementTOPDickinson37 min
May 16, 1:36 AM CDTAreal Flood AdvisoryTOPOttawa3 hr
May 16, 2:31 AM CDTFlash Flood WarningTOPOttawa6 hr
May 16, 7:11 AM CDTAreal Flood AdvisoryTOPGeary, Wabaunsee3 hr
May 16, 7:15 AM CDTAreal Flood AdvisoryTOPLyon3 hr
May 16, 8:38 AM CDTAreal Flood WarningTOPOttawa9 hr
May 16, 8:55 AM CDTAreal Flood AdvisoryTOPLyon3 hr
May 16, 9:06 AM CDTAreal Flood AdvisoryTOPOsage, Shawnee, Wabaunsee3 hr
May 16, 9:31 AM CDTRiver Flood WarningTOPOsage28 hr
May 16, 9:31 AM CDTRiver Flood WarningTOPLyon, Osage28 hr
May 16, 9:43 AM CDTAreal Flood AdvisoryTOPDouglas, Franklin3 hr
May 16, 10:14 AM CDTFlash Flood WarningTOPGeary, Lyon, Morris, Wabaunsee4 hr
May 16, 10:18 AM CDTRiver Flood WarningTOPFranklin, Osage46 hr
May 16, 11:21 AM CDTRiver Flood WarningTOPFranklin62 hr
May 16, 11:38 AM CDTRiver Flood WarningTOPWabaunsee16 hr
May 16, 11:59 AM CDTRiver Flood WarningTOPOttawa, Saline3 days
May 16, 12:02 PM CDTAreal Flood AdvisoryTOPShawnee, Wabaunsee3 hr
May 16, 1:32 PM CDTSevere Thunderstorm WarningTOPLyon28 min
May 16, 2:07 PM CDTAreal Flood WarningTOPGeary, Lyon, Morris, Wabaunsee10 hr
May 16, 2:41 PM CDTSpecial Weather StatementTOPLyon34 min
May 16, 3:14 PM CDTRiver Flood WarningTOPDickinson, Ottawa, Saline16 hr
May 16, 3:24 PM CDTSpecial Weather StatementTOPOsage36 min
May 16, 3:46 PM CDTSpecial Weather StatementTOPOsage29 min
May 16, 4:18 PM CDTSpecial Weather StatementTOPFranklin27 min
May 16, 5:33 PM CDTAreal Flood AdvisoryTOPAnderson, Coffey, Franklin, Lyon, Morris, Osage2 hr
May 16, 6:20 PM CDTSpecial Weather StatementTOPFranklin25 min

Nearby

Flash Flood Warnings in Kansas, 2021Every flash flood warning 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.