Alert archive / Kansas / Special Weather Statements in 2020

Special Weather Statement, NWS Topeka, KS

August 9, 2020Douglas County, Kansas

NWS Topeka, KS issued this special weather statement at Aug 9, 2020, 7:45 AM CDT for Douglas County, Kansas. It was in force for 30 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 9, 2020, 7:45 AM CDT (12:45 UTC)
Expired: Aug 9, 2020, 8:15 AM CDT
In force: 30 min
Issued by: NWS Topeka, KS

County Douglas County, KS

The radar

The Pleasant Hill radar (KEAX), 79 km from the middle of the area, began a volume at 12:44 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 12:00Z, 0.8 hours before the alert went out and 42 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: 505 J/kg
Mixed-layer CIN: -362 J/kg
Mixed-layer LCL: 1569 m above ground
0-6 km bulk shear: 18 kt
0-1 km storm-relative helicity: 310 m²/s²
0-3 km storm-relative helicity: 180 m²/s²
Significant tornado parameter: 0.0
Supercell composite: -0.2

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 9, 5:56 AM CDT, 1 hour 49 minutes earlier.

Area forecast discussion, Aug 9, 5:56 AM CDT, 1 hour 49 minutes before

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Hazardous weather outlook, Aug 9, 4:28 AM CDT, 3 hours 17 minutes before

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In the hours before

Special weather statement, Aug 9, 4:04 AM CDT, 3 hours 41 minutes before

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Special weather statement, Aug 9, 4:44 AM CDT, 3 hours 1 minute before

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Special weather statement, Aug 9, 6:35 AM CDT, 1 hour 10 minutes before

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Special weather statement, Aug 9, 6:51 AM CDT, 54 minutes before

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Special weather statement, Aug 9, 7:40 AM CDT, 5 minutes before

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Special weather statement, Aug 9, 7:45 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 9, 3:17 AM CDT	Special Weather Statement	TOP	Clay	43 min
Aug 9, 3:18 AM CDT	Heat Advisory	TOP	Anderson, Brown, Clay, Coffey, Dickinson, Douglas and 15 more	17 hr
Aug 9, 4:04 AM CDT	Special Weather Statement	TOP	Dickinson	41 min
Aug 9, 4:44 AM CDT	Special Weather Statement	TOP	Clay	46 min
Aug 9, 6:35 AM CDT	Special Weather Statement	TOP	Morris	40 min
Aug 9, 6:51 AM CDT	Special Weather Statement	TOP	Morris	24 min
Aug 9, 7:40 AM CDT	Special Weather Statement	TOP	Douglas	20 min
Aug 9, 5:29 PM CDT	Special Weather Statement	TOP	Anderson, Coffey, Lyon	46 min
Aug 9, 6:40 PM CDT	Special Weather Statement	TOP	Coffey	20 min
Aug 9, 6:45 PM CDT	Severe Thunderstorm Warning	TOP	Coffey	45 min

Nearby

Special Weather Statements in Kansas, 2020 Every special weather statement in 2020

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.