Alert archive / Kansas / Special Weather Statements in 2013

Special Weather Statement, NWS Topeka, KS

April 7, 2013Jefferson County, Shawnee County, Kansas

NWS Topeka, KS issued this special weather statement at Apr 7, 2013, 10:53 PM CDT for Jefferson County, Shawnee County, Kansas. It was in force for 52 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 7, 2013, 10:53 PM CDT (03:53 UTC)
Expired
Apr 7, 2013, 11:45 PM CDT
In force
52 min
Issued by
NWS Topeka, KS

Counties Jefferson County, KS, Shawnee County, KS

The radar

The Topeka radar (KTWX), 71 km from the middle of the area, began a volume at 03:53 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, 3.9 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-pSkew-T log-p diagram, Topeka, KS at 00:00Z on 2013-04-08Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 54 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Topeka, KS at 00:00Z on 2013-04-08The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 138 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
54 J/kg
Mixed-layer CIN
-143 J/kg
Mixed-layer LCL
1535 m above ground
0-6 km bulk shear
52 kt
0-1 km storm-relative helicity
138 m²/s²
0-3 km storm-relative helicity
172 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

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 7, 10:00 PM CDT, 53 minutes earlier.

Area forecast discussion, Apr 7, 10:00 PM CDT, 53 minutes before
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Hazardous weather outlook, Apr 7, 3:39 PM CDT, 7 hours 14 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TOPEKA KS
339 PM CDT SUN APR 7 2013

KSZ008>012-020>024-026-034>040-054>056-058-059-082045-
REPUBLIC-WASHINGTON-MARSHALL-NEMAHA-BROWN-CLOUD-CLAY-RILEY-
POTTAWATOMIE-JACKSON-JEFFERSON-OTTAWA-DICKINSON-GEARY-MORRIS-
WABAUNSEE-SHAWNEE-DOUGLAS-LYON-OSAGE-FRANKLIN-COFFEY-ANDERSON-
339 PM CDT SUN APR 7 2013

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

SCATTERED THUNDERSTORMS ARE EXPECTED TO CONTINUE DEVELOPING INTO
THE EVENING HOURS...ESPECIALLY ALONG AND SOUTH OF I 70. SOME OF
STRONGER STORMS MAY BE CAPABLE OF PRODUCING HAIL TO THE SIZE OF
QUARTERS AS WELL AS STRONG GUSTY WINDS. THUNDERSTORMS SHOULD THEN
BEGIN TO SHIFT EAST OF THE AREA AFTER MIDNIGHT.

.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.

THERE WILL BE SEVERAL CHANCES FOR MORE THUNDERSTORMS ACROSS THE
ENTIRE AREA FROM MONDAY THROUGH TUESDAY NIGHT. THE MOST LIKELY
TIMEFRAME FOR STRONG TO SEVERE THUNDERSTORMS WILL BE MONDAY NIGHT
TO THE NORTH AND WEST OF INTERSTATE 70...THEN AGAIN ACROSS THE
ENTIRE AREA TUESDAY AFTERNOON AND EVENING.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED THROUGH TONIGHT.

In the hours before

Special weather statement, Apr 7, 7:02 PM CDT, 3 hours 51 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TOPEKA KS
702 PM CDT SUN APR 7 2013

KSZ008-020-080030-
CLOUD-REPUBLIC-
702 PM CDT SUN APR 7 2013

...SIGNIFICANT WEATHER ADVISORY FOR SOUTH CENTRAL REPUBLIC AND
NORTHWESTERN CLOUD COUNTIES...

THROUGH 730 PM CDT...A THUNDERSTORM WILL MOVE NORTHEAST AT 25 MPH
ACROSS PORTIONS OF SOUTH CENTRAL REPUBLIC AND NORTHWESTERN CLOUD
COUNTIES. NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THIS STORM
IS CAPABLE OF PRODUCING PENNY SIZE HAIL...WINDS UP TO 40 MPH AND
HEAVY RAIN. SOME LOCATIONS THAT COULD BE AFFECTED INCLUDE CONCORDIA
AIRPORT...CONCORDIA AND NORWAY.

STAY ALERT TO THE WEATHER IN CASE A WARNING IS ISSUED.

&&

LAT...LON 3980 9768 3964 9742 3944 9773 3955 9792
TIME...MOT...LOC 0002Z 221DEG 23KT 3952 9780
Local storm report, Apr 7, 7:31 PM CDT, 3 hours 22 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TOPEKA KS
731 PM CDT SUN APR 07 2013

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

0715 PM     HAIL             3 ESE JAMESTOWN         39.59N 97.81W
04/07/2013  E1.00 INCH       CLOUD              KS   TRAINED SPOTTER

            RANGED FROM PEA TO QUARTER SIZE HAIL

&&

KSANDERS
Special weather statement, Apr 7, 7:48 PM CDT, 3 hours 5 minutes before
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Special weather statement, Apr 7, 8:11 PM CDT, 2 hours 42 minutes before
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Special weather statement, Apr 7, 10:39 PM CDT, 14 minutes before
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Special weather statement, Apr 7, 10:53 PM CDT, 0 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Apr 7, 7:02 PM CDTSpecial Weather StatementTOPCloud28 min
Apr 7, 7:15 PM CDTSevere Thunderstorm WarningTOPCloud, Republic30 min
Apr 7, 7:34 PM CDTSevere Thunderstorm WarningTOPRepublic41 min
Apr 7, 7:48 PM CDTSpecial Weather StatementTOPJefferson27 min
Apr 7, 8:11 PM CDTSpecial Weather StatementTOPPottawatomie49 min
Apr 7, 10:39 PM CDTSpecial Weather StatementTOPAtchison36 min
Apr 7, 11:45 PM CDTSpecial Weather StatementTOPJefferson30 min

Nearby

Special Weather Statements in Kansas, 2013Every special weather statement in 2013

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.