Alert archive / Kansas / Special Weather Statements in 2012

Special Weather Statement, NWS Topeka, KS

April 15, 2012Jackson County, Shawnee County, Kansas

NWS Topeka, KS issued this special weather statement at Apr 15, 2012, 3:30 AM CDT for Jackson County, Shawnee 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: Apr 15, 2012, 3:30 AM CDT (08:30 UTC)
Expired: Apr 15, 2012, 4:00 AM CDT
In force: 30 min
Issued by: NWS Topeka, KS

Counties Jackson County, KS, Shawnee County, KS

The radar

The Topeka radar (KTWX), 41 km from the middle of the area, began a volume at 08:32 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 00:00Z, 8.5 hours before the alert went out and 26 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: 1788 J/kg
Mixed-layer CIN: -2 J/kg
Mixed-layer LCL: 665 m above ground
0-6 km bulk shear: 58 kt
0-1 km storm-relative helicity: 401 m²/s²
0-3 km storm-relative helicity: 443 m²/s²
Significant tornado parameter: 5.2
Supercell composite: 17.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

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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 Apr 15, 3:18 AM CDT, 12 minutes earlier.

Area forecast discussion, Apr 15, 3:18 AM CDT, 12 minutes before

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Hazardous weather outlook, Apr 14, 8:51 PM CDT, 6 hours 39 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TOPEKA KS
851 PM CDT SAT APR 14 2012

KSZ008>012-020>024-026-034>040-054>056-058-059-160200-
REPUBLIC-WASHINGTON-MARSHALL-NEMAHA-BROWN-CLOUD-CLAY-RILEY-
POTTAWATOMIE-JACKSON-JEFFERSON-OTTAWA-DICKINSON-GEARY-MORRIS-
WABAUNSEE-SHAWNEE-DOUGLAS-LYON-OSAGE-FRANKLIN-COFFEY-ANDERSON-
851 PM CDT SAT APR 14 2012

THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL...NORTH
CENTRAL AND NORTHEAST KANSAS.

.DAY ONE...TONIGHT.

MULTIPLE ROUNDS OF SEVERE THUNDERSTORMS ARE LIKELY THROUGH THE
NIGHT. AS THE NIGHT PROGRESSES...THE COVERAGE OF STORMS IS
EXPECTED TO INCREASE. VERY LARGE HAIL UP TO THE SIZE OF
BASEBALLS...DAMAGING WIND GUSTS...AND VIOLENT TORNADOES WILL BE
POSSIBLE WITH SOME OF THESE STORMS.

.DAYS TWO THROUGH SEVEN...SUNDAY THROUGH FRIDAY.

THUNDERSTORMS ARE EXPECTED TO BE ONGOING IN FAR EASTERN KANSAS
AROUND SUNRISE SUNDAY...AND WILL EXIT THE AREA PRIOR TO MIDDAY. A
FEW SEVERE STORMS WITH DAMAGING WINDS AND LARGE HAIL WILL REMAIN
TO BE POSSIBLE IN THE MORNING.

THE NEXT CHANCE OF THUNDERSTORMS IS THURSDAY THROUGH FRIDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL BE NEEDED THROUGH THE NIGHT.

In the hours before

Local storm report, Apr 15, 1:56 AM CDT, 1 hour 34 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TOPEKA KS
156 AM CDT SUN APR 15 2012

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0153 AM     HAIL             VERMILLION              39.72N 96.27W
04/15/2012  E1.25 INCH       MARSHALL           KS   EMERGENCY MNGR

&&

MRC

Local storm report, Apr 15, 2:36 AM CDT, 54 minutes before

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Local storm report, Apr 15, 2:41 AM CDT, 49 minutes before

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Local storm report, Apr 15, 3:01 AM CDT, 29 minutes before

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Special weather statement, Apr 15, 3:15 AM CDT, 15 minutes before

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Special weather statement, Apr 15, 3:30 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
Apr 14, 7:24 PM CDT	Tornado Warning Tornado observed	TOP	Clay, Dickinson	51 min
Apr 14, 8:01 PM CDT	Tornado Warning Tornado observed	TOP	Clay, Riley	29 min
Apr 14, 8:43 PM CDT	Tornado Warning Tornado observed	TOP	Dickinson, Morris	47 min
Apr 14, 9:22 PM CDT	Tornado Warning	TOP	Geary, Morris, Wabaunsee	38 min
Apr 14, 11:08 PM CDT	Tornado Warning	TOP	Dickinson	37 min
Apr 14, 11:31 PM CDT	Severe Thunderstorm Warning	TOP	Ottawa	29 min
Apr 14, 11:36 PM CDT	Severe Thunderstorm Warning	TOP	Clay, Dickinson, Geary, Riley	20 min
Apr 14, 11:48 PM CDT	Tornado Warning Tornado observed	TOP	Lyon	42 min
Apr 15, 12:00 AM CDT	Severe Thunderstorm Warning	TOP	Clay, Dickinson, Ottawa	45 min
Apr 15, 12:41 AM CDT	Severe Thunderstorm Warning	TOP	Clay, Dickinson, Geary, Riley	49 min
Apr 15, 12:47 AM CDT	Tornado Warning	TOP	Clay, Dickinson, Geary, Riley	28 min
Apr 15, 12:52 AM CDT	Severe Thunderstorm Warning	TOP	Brown, Marshall, Nemaha, Pottawatomie	38 min
Apr 15, 1:15 AM CDT	Tornado Warning Tornado observed	TOP	Pottawatomie, Riley	15 min
Apr 15, 1:30 AM CDT	Tornado Warning	TOP	Marshall, Nemaha, Pottawatomie	30 min
Apr 15, 1:38 AM CDT	Severe Thunderstorm Warning	TOP	Clay, Riley, Washington	37 min
Apr 15, 1:51 AM CDT	Severe Thunderstorm Warning	TOP	Jackson, Marshall, Nemaha, Pottawatomie	34 min
Apr 15, 2:13 AM CDT	Severe Thunderstorm Warning	TOP	Marshall, Pottawatomie, Riley	24 min
Apr 15, 3:15 AM CDT	Special Weather Statement	TOP	Wabaunsee	15 min
Apr 15, 3:24 AM CDT	Wind Advisory	TOP	Anderson, Brown, Clay, Cloud, Coffey, Dickinson and 17 more	17 hr
Apr 15, 3:59 AM CDT	Special Weather Statement	TOP	Jefferson	31 min
Apr 15, 4:13 AM CDT	Areal Flood Warning	TOP	Nemaha	3 hr
Apr 15, 4:22 AM CDT	River Flood Warning	TOP	Riley	15 hr
Apr 15, 5:06 AM CDT	Special Weather Statement	TOP	Anderson, Coffey, Douglas, Franklin, Osage	54 min
Apr 15, 7:40 AM CDT	Areal Flood Advisory	TOP	Clay, Dickinson, Ottawa	2 hr
Apr 15, 7:53 AM CDT	River Flood Warning	TOP	Clay	7 hr
Apr 15, 8:32 AM CDT	River Flood Warning	TOP	Marshall	7 hr
Apr 15, 9:29 AM CDT	River Flood Warning	TOP	Cloud	4 hr
Apr 15, 9:45 AM CDT	Areal Flood Warning	TOP	Clay	3 hr

Nearby

Special Weather Statements in Kansas, 2012 Every special weather statement in 2012

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.