Alert archive / Kansas / Special Weather Statements in 2018

Special Weather Statement, NWS Topeka, KS

May 16, 2018Jefferson County, Kansas

NWS Topeka, KS issued this special weather statement at May 16, 2018, 6:13 PM CDT for Jefferson County, Kansas. It was in force for 32 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: May 16, 2018, 6:13 PM CDT (23:13 UTC)
Expired: May 16, 2018, 6:45 PM CDT
In force: 32 min
Issued by: NWS Topeka, KS

County Jefferson County, KS

The radar

The Topeka radar (KTWX), 81 km from the middle of the area, began a volume at 23:16 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, 11.2 hours before the alert went out and 304 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: 1078 J/kg
Mixed-layer CIN: -15 J/kg
Mixed-layer LCL: 668 m above ground
0-6 km bulk shear: 8 kt
0-1 km storm-relative helicity: -22 m²/s²
0-3 km storm-relative helicity: 16 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.0

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 May 16, 3:16 PM CDT, 2 hours 57 minutes earlier.

Area forecast discussion, May 16, 3:16 PM CDT, 2 hours 57 minutes before

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Hazardous weather outlook, May 16, 1:04 PM CDT, 5 hours 9 minutes before

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In the hours before

Special weather statement, May 16, 6:01 PM CDT, 12 minutes before

Special Weather Statement
National Weather Service Topeka KS
601 PM CDT WED MAY 16 2018

KSZ011-024-162330-
Jackson-Nemaha-
601 PM CDT WED MAY 16 2018

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN NEMAHA AND NORTHERN
JACKSON COUNTIES UNTIL 630 PM CDT...

At 601 PM CDT, Doppler radar was tracking a strong thunderstorm 4
miles southwest of Wetmore, moving southeast at 5 mph.

Nickel size hail and winds up to 40 mph will be possible with this
storm.

Locations impacted include...
Holton, Wetmore, Whiting, Circleville, Netawaka and Soldier.

LAT...LON 3957 9556 3957 9557 3948 9557 3952 9602
      3965 9593 3965 9556
TIME...MOT...LOC 2301Z 326DEG 4KT 3959 9587

Sanders

Special weather statement, May 16, 6:13 PM CDT, 0 minutes before

Special Weather Statement
National Weather Service Topeka KS
613 PM CDT WED MAY 16 2018

KSZ026-162345-
Jefferson-
613 PM CDT WED MAY 16 2018

...SIGNIFICANT WEATHER ADVISORY FOR NORTHERN JEFFERSON COUNTY UNTIL
645 PM CDT...

At 613 PM CDT, Doppler radar was tracking a strong thunderstorm over
Nortonville, moving south at 10 mph.

Nickel size hail and winds up to 40 mph will be possible with this
storm.

Locations impacted include...
Valley Falls, Nortonville and Winchester.

LAT...LON 3927 9556 3942 9552 3942 9518 3927 9518
TIME...MOT...LOC 2313Z 351DEG 7KT 3942 9537

Sanders

The office that day

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

Issued	Product	Office	Counties	Lasted
May 16, 6:01 PM CDT	Special Weather Statement	TOP	Jackson	29 min

Nearby

Special Weather Statements in Kansas, 2018 Every special weather statement 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.