Alert archive / Kansas / Flood Watches in 2018

Flood Watch 1, NWS Topeka, KS

October 6, 201823 counties in Kansas

NWS Topeka, KS issued this flood watch at Oct 6, 2018, 4:09 PM CDT for 23 counties in Kansas. It took effect at Oct 7, 2018, 7:00 AM CDT. It was in force for 61 hr.

The area

The counties it named.

The facts

Issued: Oct 6, 2018, 4:09 PM CDT (21:09 UTC)
In effect from: Oct 7, 2018, 7:00 AM CDT
Expired: Oct 9, 2018, 7:59 PM CDT
In force: 61 hr
Issued by: NWS Topeka, KS
Flood severity: None

All 23 counties

Anderson County, KS, Brown County, KS, Clay County, KS, Cloud County, KS, Coffey County, KS, Dickinson County, KS, Douglas County, KS, Franklin County, KS, Geary County, KS, Jackson County, KS, Jefferson County, KS, Lyon County, KS, Marshall County, KS, Morris County, KS, Nemaha County, KS, Osage County, KS, Ottawa County, KS, Pottawatomie County, KS, Republic County, KS, Riley County, KS, Shawnee County, KS, Wabaunsee County, KS, Washington County, KS

The radar

The Topeka radar (KTWX), 16 km from the middle of the area, began a volume at 21:10 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

Springfield, MO (KSGF), launched 12:00Z, 9.2 hours before the alert went out and 332 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: 710 J/kg
Mixed-layer CIN: -26 J/kg
Mixed-layer LCL: 758 m above ground
0-6 km bulk shear: 29 kt
0-1 km storm-relative helicity: 258 m²/s²
0-3 km storm-relative helicity: 243 m²/s²
Significant tornado parameter: 0.6
Supercell composite: 4.0

Open this sounding in Storm Lab

What forecasters said that day

The local office's own words before this 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 flood watch went out at Oct 6, 3:50 PM CDT, 19 minutes earlier.

Area forecast discussion, Oct 6, 3:50 PM CDT, 19 minutes before

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Hazardous weather outlook, Oct 6, 3:53 PM CDT, 16 minutes before

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In the hours before

Local storm report, Oct 6, 10:38 AM CDT, 5 hours 31 minutes before

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Local storm report, Oct 6, 11:24 AM CDT, 4 hours 45 minutes before

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Local storm report, Oct 6, 1:38 PM CDT, 2 hours 31 minutes before

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The office that day

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

Issued	Product	Office	Counties	Lasted
Oct 5, 7:18 PM CDT	Special Weather Statement	TOP	Republic	27 min
Oct 5, 7:45 PM CDT	Special Weather Statement	TOP	Republic	30 min
Oct 5, 8:13 PM CDT	Special Weather Statement	TOP	Republic, Washington	32 min
Oct 6, 2:28 AM CDT	Areal Flood Advisory	TOP	Dickinson, Geary	4 hr
Oct 6, 4:52 AM CDT	Areal Flood Advisory	TOP	Jefferson, Osage, Shawnee, Wabaunsee	3 hr
Oct 6, 5:51 AM CDT	Areal Flood Advisory	TOP	Lyon, Morris, Osage, Wabaunsee	2 hr
Oct 6, 6:06 AM CDT	Areal Flood Advisory	TOP	Osage, Shawnee	3 hr
Oct 6, 6:18 AM CDT	Areal Flood Advisory	TOP	Douglas, Jefferson	3 hr

Nearby

Flood Watches in Kansas, 2018 Every flood watch in 2018

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.