Alert archive / Kansas / Special Weather Statements in 2019

Special Weather Statement, NWS Topeka, KS

August 7, 2019Coffey County, Lyon County, Kansas

NWS Topeka, KS issued this special weather statement at Aug 7, 2019, 9:18 AM CDT for Coffey County, Lyon County, Kansas. It was in force for 27 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued: Aug 7, 2019, 9:18 AM CDT (14:18 UTC)
Expired: Aug 7, 2019, 9:45 AM CDT
In force: 27 min
Issued by: NWS Topeka, KS

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 14:21 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, 2.3 hours before the alert went out and 257 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: 632 J/kg
Mixed-layer CIN: -177 J/kg
Mixed-layer LCL: 1611 m above ground
0-6 km bulk shear: 31 kt
0-1 km storm-relative helicity: 114 m²/s²
0-3 km storm-relative helicity: 137 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.3

Open this sounding in Storm Lab

The text

As transmitted.

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What forecasters said that day

The local office's own words before this special weather statement 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 special weather statement went out at Aug 7, 6:09 AM CDT, 3 hours 9 minutes earlier.

Area forecast discussion, Aug 7, 6:09 AM CDT, 3 hours 9 minutes before

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Hazardous weather outlook, Aug 7, 3:21 AM CDT, 5 hours 57 minutes before

Hazardous Weather Outlook
National Weather Service Topeka KS
321 AM CDT Wed Aug 7 2019

KSZ021>024-026-034>040-054>056-058-059-080830-
Clay-Riley-Pottawatomie-Jackson-Jefferson-Ottawa-Dickinson-Geary-
Morris-Wabaunsee-Shawnee-Douglas-Lyon-Osage-Franklin-Coffey-
Anderson-
321 AM CDT Wed Aug 7 2019

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

.DAY ONE...Today and Tonight.

A flash flood watch is in effect for tonight.

Thunderstorms will sweep across the area this morning producing
the risk for damaging winds and perhaps some hail. The severe risk
from storms this morning will likely last through midday.

After 4 pm, additional storms are expected to develop and some
could be severe with the risk for large hail and damaging winds.
In addition...very heavy flooding rains are expected to occur from
thunderstorms that develop overnight. Some areas could see 2 to 6
inches of rain and a few areas could see more.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Thunderstorms will be possible every day for the rest of the
week. Although isolated severe weather cannot be ruled out it, it
appears that the greater threat will be from locally heavy rains
with some risk for flash flooding through Saturday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed both early this morning and again
after 4 pm today.

&&

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

KSZ008>012-020-080830-
Republic-Washington-Marshall-Nemaha-Brown-Cloud-
321 AM CDT Wed Aug 7 2019

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

.DAY ONE...Today and Tonight.

Thunderstorms will sweep across the area this morning producing
the risk for damaging winds and perhaps some hail. The severe risk
from storms this morning will likely last through midday.

After 4 pm, additional storms are expected to develop and some
could be severe with the risk for large hail and damaging winds.

.DAYS TWO THROUGH SEVEN...Thursday through Tuesday.

Thunderstorms will be possible every day for the rest of the
week. Although isolated severe weather cannot be ruled out it, it
appears that the greater threat will be from locally heavy rains
with some continued risk for flash flooding through Saturday.

.SPOTTER INFORMATION STATEMENT...

Spotter activation may be needed early this morning and again
after 4 pm this afternoon.

&&

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

In the hours before

Local storm report, Aug 7, 6:45 AM CDT, 2 hours 33 minutes before

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Local storm report, Aug 7, 6:58 AM CDT, 2 hours 20 minutes before

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Local storm report, Aug 7, 7:02 AM CDT, 2 hours 16 minutes before

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Local storm report, Aug 7, 7:06 AM CDT, 2 hours 12 minutes before

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Local storm report, Aug 7, 8:05 AM CDT, 1 hour 13 minutes before

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Special weather statement, Aug 7, 9:18 AM CDT, 0 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
Aug 7, 3:04 AM CDT	Flash Flood Watch	TOP	Anderson, Clay, Cloud, Coffey, Dickinson, Douglas and 15 more	32 hr
Aug 7, 3:51 AM CDT	Severe Thunderstorm Warning	TOP	Cloud, Republic, Washington	39 min
Aug 7, 4:29 AM CDT	Special Weather Statement	TOP	Cloud, Republic, Washington	31 min
Aug 7, 4:44 AM CDT	Special Weather Statement	TOP	Marshall, Nemaha	31 min
Aug 7, 5:00 AM CDT	Special Weather Statement	TOP	Clay, Cloud, Ottawa, Washington	30 min
Aug 7, 5:22 AM CDT	Severe Thunderstorm Warning	TOP	Jackson, Marshall, Nemaha, Pottawatomie	38 min
Aug 7, 5:38 AM CDT	Severe Thunderstorm Warning	TOP	Clay, Geary, Marshall, Pottawatomie, Riley, Washington	52 min
Aug 7, 5:51 AM CDT	Severe Thunderstorm Warning	TOP	Jackson, Jefferson, Pottawatomie, Shawnee, Wabaunsee	39 min
Aug 7, 5:58 AM CDT	Severe Thunderstorm Warning	TOP	Geary, Morris, Pottawatomie, Riley, Wabaunsee	47 min
Aug 7, 6:21 AM CDT	Severe Thunderstorm Warning	TOP	Douglas, Geary, Jackson, Jefferson, Lyon, Morris and 5 more	39 min
Aug 7, 6:54 AM CDT	Severe Thunderstorm Warning	TOP	Anderson, Coffey, Douglas, Franklin, Jefferson, Lyon and 4 more	66 min
Aug 7, 5:05 PM CDT	Special Weather Statement	TOP	Anderson	55 min

Nearby

Special Weather Statements in Kansas, 2019 Every special weather statement 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.