Alert archive / Kansas / Special Weather Statements in 2012

Special Weather Statement, NWS Topeka, KS

July 19, 2012Lyon County, Kansas

NWS Topeka, KS issued this special weather statement at Jul 19, 2012, 4:21 AM CDT for Lyon County, Kansas. It was in force for 24 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
Jul 19, 2012, 4:21 AM CDT (09:21 UTC)
Expired
Jul 19, 2012, 4:45 AM CDT
In force
24 min
Issued by
NWS Topeka, KS

County Lyon County, KS

The radar

The Topeka radar (KTWX), 45 km from the middle of the area, began a volume at 09:21 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

Topeka, KS (KTOP), launched 00:00Z, 9.4 hours before the alert went out and 77 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 2012-07-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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 2012-07-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 30 square meters per square second.1939Sfc1 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
4009 m above ground
0-6 km bulk shear
13 kt
0-1 km storm-relative helicity
30 m²/s²
0-3 km storm-relative helicity
98 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

545 
WWUS83 KTOP 190921
SPSTOP

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TOPEKA KS
421 AM CDT THU JUL 19 2012

KSZ037-054-190945-
LYON-MORRIS-
421 AM CDT THU JUL 19 2012

...SIGNIFICANT WEATHER ADVISORY FOR SOUTHEASTERN MORRIS AND
NORTHWESTERN LYON COUNTIES...

THROUGH 445 AM CDT...A LINE OF THUNDERSTORMS WILL MOVE EAST AT 15 MPH
ACROSS PORTIONS OF SOUTHEASTERN MORRIS AND NORTHWESTERN LYON
COUNTIES. NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THESE
STORMS ARE CAPABLE OF PRODUCING PEA SIZE HAIL AND STRONG WINDS OF 40 
TO 50 MPH. SOME LOCATIONS THAT COULD BE AFFECTED INCLUDE DUNLAP AND 
BUSHONG.

&&

LAT...LON 3846 9636 3852 9636 3852 9649 3862 9646
      3875 9649 3874 9639 3874 9636 3874 9623
      3863 9621 3846 9631
TIME...MOT...LOC 0920Z 270DEG 15KT 3874 9639 3863 9635
          3855 9638

$$

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 18, 7:55 PM CDTSpecial Weather StatementTOPDickinson35 min
Jul 18, 7:56 PM CDTSpecial Weather StatementTOPOttawa34 min
Jul 18, 8:00 PM CDTSevere Thunderstorm WarningTOPOttawa30 min
Jul 18, 8:31 PM CDTSevere Thunderstorm WarningTOPDickinson, Ottawa44 min
Jul 18, 9:15 PM CDTSpecial Weather StatementTOPDickinson30 min

Nearby

Special Weather Statements in Kansas, 2012Every 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.