Alert archive / Kansas / Special Weather Statements in 2011

Special Weather Statement, NWS Topeka, KS

July 28, 2011Riley County, Kansas

NWS Topeka, KS issued this special weather statement at Jul 28, 2011, 9:32 PM CDT for Riley County, Kansas. It was in force for 28 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 28, 2011, 9:32 PM CDT (02:32 UTC)
Expired: Jul 28, 2011, 10:00 PM CDT
In force: 28 min
Issued by: NWS Topeka, KS

County Riley County, KS

The radar

The Topeka radar (KTWX), 61 km from the middle of the area, began a volume at 02:32 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, 2.5 hours before the alert went out and 102 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: 842 J/kg
Mixed-layer CIN: -60 J/kg
Mixed-layer LCL: 2433 m above ground
0-6 km bulk shear: 15 kt
0-1 km storm-relative helicity: 8 m²/s²
0-3 km storm-relative helicity: 59 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.

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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 Jul 28, 6:21 PM CDT, 3 hours 11 minutes earlier.

Area forecast discussion, Jul 28, 6:21 PM CDT, 3 hours 11 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE TOPEKA KS
621 PM CDT THU JUL 28 2011

.UPDATE...
UPDATED THE AVIATION DISCUSSION.

&&

.DISCUSSION...
SEE PREV DISCUSSION.

&&

.AVIATION...
PINPOINTING WHERE CONVECTION WILL OCCUR IS THE MAIN PROBLEM THIS
EVENING. RADAR SHOWS THE BOUNDARY PRETTY OBVIOUSLY WHICH IS SLOWLY
SLIDING SOUTH ACROSS TOPEKA NOW. THERE ARE VARIOUS SOLUTIONS WITH
CONVECTION ALONG THE BOUNDARY OR BEHIND THE FRONT. WATCHING CURRENT
TRENDS...THINK THE NAM SOLUTION OF CONVECTION HOLDING CLOSE TO THE
BOUNDARY IS A LITTLE BETTER GIVEN LITTLE OR NO DYNAMIC FORCING. WITH
THE BOUNDARY CONTINUING TO SLIDE SOUTH...THERE IS A CHANCE FOR
CONVECTION TO REMAIN SOUTH OF FOE. THEREFORE WILL MENTION VCTS AND
MONITOR TRENDS IF STORMS LOOK LIKE THEY START TO DEVELOP POST
FRONTAL.

WOLTERS

&&

.PREV DISCUSSION... /315 PM CDT THU JUL 28 2011/
TONIGHT THROUGH FRIDAY...THIS AFTERNOON A COLD FRONT EXTENDED FROM
CENTRAL IA...SOUTHWEST ACROSS THE NORTHEAST AND CENTRAL CWA...THEN
WEST AND SOUTHWEST ACROSS SOUTHWEST KS INTO SOUTHEASTERN CO. THE
FRONT WAS LOCATED AT 200 PM FROM HIAWATHA...SOUTHWEST TO ALMA...THEN
SOUTHWEST TO CARLTON. SOUTH AND EAST OF THE FRONT TEMPERATURES WERE
AROUND 100 DEGREES. NORTHWEST OF THE FRONT TEMPERATURES WERE IN THE
UPPER 80S TO LOWER 90S. HEAT INDICES ACROSS EAST CENTRAL KS RANGED
FROM 104 TO 109 DEGREES. THE EXCESSIVE HEAT WARNING WILL CONTINUE
UNTIL 700 PM CDT FOR MUCH OF THE EAST CENTRAL KS.

LATE THIS AFTERNOON AND TONIGHT...ISOLATED TO SCATTERED
THUNDERSTORMS WILL BEGIN TO DEVELOP ALONG THE FRONT IN CENTRAL
KS...WHERE TEMPERATURES ARE NEAR CONVECTIVE TEMPS OF 105 DEGREE.
THESE THUNDERSTORMS WILL EXPAND NORTHEAST ALONG AND BEHIND THE
SURFACE COLD FRONT. ASCENT WILL INCREASE AS A INTENSE H5 TROUGH OVER
THE GREAT BASIN LIFTS EAST INTO THE NORTHERN AND CENTRAL PLAINS. I
RAISED POPS TO LIKELY CHANCES FOR THIS EVENING NORTHWEST OF THE KS
TURNPIKE. IF THE BROKEN LINE OF THUNDERSTORMS THAT DEVELOP ALONG THE
FRONT CAN HOLD TOGETHER THEN MUCH OF EAST CENTRAL KS MAY GET SOME
BENEFICIAL RAINFALL...THE 19Z RUN OF THE HRRR MODEL DOES SHOW THIS
SCENARIO.

SOME OF THE THUNDERSTORMS IN THE WARM SECTOR ALONG AND SOUTHEAST OF
THE COLD FRONT MAY PRODUCE DAMAGING WINDS GIVEN
TEMPERATURE-TEMPERATURE DEWPOINT DEPRESSIONS OF 40 DEGREES ACROSS
THE SOUTHWEST COUNTIES OF THE CWA. THE ENVIRONMENT WILL HAVE PW OF
2-2.25 INCHES THUS THUNDERSTORMS WILL BE CAPABLE OF PRODUCING
PERIODS OF HEAVY RAINFALL AS WELL. SBCAPE NORTH OF THE BOUNDARY WAS
IN THE 2,000 TO 4,000 J/KG RANGE ALONG WITH SFC-6KM BULK SHEAR OF 30
KTS...THUS ANY THUNDERSTORMS NORTH OF THE FRONT MAY PRODUCE LARGE
HAIL...POTENTIALLY DAMAGING WINDS AND HEAVY RAINFALL. THE SEVERE
WEATHER THREAT SHOULD DIMINISH LATER THIS EVENING. THE BETTER
CHANCES FOR RAIN AND THUNDERSTORMS WILL SHIFT FARTHER NORTH ALONG
THE NE BORDER WHERE THE STRONGER ISENTROPIC LIFT WILL DEVELOP. MUCH
OF THE AREA ALONG AND SOUTH OF I-70 MAY NOT SEE MUCH RAIN AFTER
MIDNIGHT.

FRIDAY...THE FRONT WILL PUSH SOUTH OF THE CWA DURING THE MORNING
HOURS AND BECOME STATIONARY ACROSS SOUTHERN KS. SCATTERED SHOWERS
AND ISOLATED THUNDERSTORMS MAY BE POSSIBLE THROUGH THE DAY NORTH OF
THE FRONT ACROSS MOST OF THE CWA...WITH THE BETTER CHANCES ACROSS
THE SOUTHERN COUNTIES. HIGHS WILL BE COOLER WITH UPPER 80S TO LOWER
90S.

GARGAN

SATURDAY THROUGH THURSDAY...ADDITIONAL CONVECTION WILL BE POSSIBLE
NEAR THE FRONT PRIMARILY IN EAST CENTRAL KANSAS SATURDAY. UPPER
LEVEL RIDGING WILL BEGIN TO AMPLIFY OVER THE WEEKEND INTO EARLY NEXT
WEEK. HIGH AND LOW TEMPERATURES WILL TREND UPWARD WITH FORECAST
MODELS PROGGING 850MB TEMPERATURES RANGING FROM 21 TO 25 DEGREES
CELSIUS.

THE PRESSURE GRADIENT WILL TIGHTEN ACROSS THE CENTRAL PLAINS
SUNDAY THROUGH EARLY NEXT WEEK WITH A SHORTWAVE TROUGH TOPPING
THE UPPER RIDGE IN THE NORTHERN PLAINS. SOUTHWEST FLOW ALOFT WILL
PRODUCED THE HOTTEST DAYS OF THE WEEK ON MONDAY AND TUESDAY WITH
MORE TRIPLE DIGITS EXPECTED. HEAT AND HUMIDITY IMPACTS WILL
LIKELY WARRANT THE NEED FOR HEAT HEADLINES POSSIBLY AS EARLY AS
THIS WEEKEND AND FOR NEXT WEEK.

A WEAK FRONT IS PROGGED BY THE FORECAST MODELS TO ENTER NORTHERN
KANSAS TUESDAY NIGHT AND LINGER IN NORTHEAST KANSAS THROUGH THE
REST OF THE WEEK. IT SHOULD BE EMPHASIZED THAT THIS FRONT WILL BE
VERY WEAK. HOWEVER...THIS BOUNDARY ALONG WITH SHORTWAVE ENERGY
TOPPING THE RIDGE WILL PROVIDE A FOCUS FOR ISOLATED THUNDERSTORM
DEVELOPMENT DURING THE LATE AFTERNOON/EARLY EVENING AND THE
OVERNIGHT/EARLY MORNING TIME FRAMES. CONVECTIVE EVOLUTION WILL
DICTATE THE REALIZED POSITION OF THIS BOUNDARY DAY TO DAY.

ANGLE

&&

.TOP WATCHES/WARNINGS/ADVISORIES...NONE.

&&

Hazardous weather outlook, Jul 28, 3:32 PM CDT, 6 hours before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE TOPEKA KS
332 PM CDT THU JUL 28 2011

KSZ008>012-020>024-026-034>040-054>056-058-059-292045-
REPUBLIC-WASHINGTON-MARSHALL-NEMAHA-BROWN-CLOUD-CLAY-RILEY-
POTTAWATOMIE-JACKSON-JEFFERSON-OTTAWA-DICKINSON-GEARY-MORRIS-
WABAUNSEE-SHAWNEE-DOUGLAS-LYON-OSAGE-FRANKLIN-COFFEY-ANDERSON-
332 PM CDT THU JUL 28 2011

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

.DAY ONE...THIS AFTERNOON AND TONIGHT.

AN EXCESSIVE HEAT WARNING WILL REMAIN IN EFFECT MAINLY ALONG AND
SOUTH OF INTERSTATE 70...WITH AFTERNOON HEAT INDICES IN THE 105
TO 110 DEGREE RANGE.

THUNDERSTORMS WILL DEVELOP ACROSS NORTH CENTRAL KANSAS LATE THIS
AFTERNOON AND BUILD EAST ACROSS THE REMAINDER OF THE AREA THIS
EVENING. THE PRIMARY HAZARDS FROM THESE STORMS WILL BE STRONG
DOWN-BURST WINDS...QUARTER SIZE HAIL AND LOCALLY HEAVY RAINFALL.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY.

THUNDERSTORMS ARE POSSIBLE ACROSS MOST OF THE AREA THROUGH
SATURDAY. THE PRIMARY HAZARDS FROM THESE STORMS WILL BE DAMAGING
WINDS AND LOCALLY HEAVY RAINFALL.

ADDITIONAL ISOLATED THUNDERSTORMS WILL BE POSSIBLE TUESDAY NIGHT
AND WEDNESDAY.

HEAT INDEX VALUES WILL RANGE FROM NEAR 102 TO 107 SUNDAY THROUGH
WEDNESDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL NOT BE NEEDED THROUGH TONIGHT.

In the hours before

Local storm report, Jul 28, 8:17 PM CDT, 1 hour 15 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TOPEKA KS
817 PM CDT THU JUL 28 2011

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

0816 PM     TSTM WND GST     2 NNE WELLS             39.16N 97.54W
07/28/2011  E80 MPH          OTTAWA             KS   TRAINED SPOTTER

&&

BYRNE

Local storm report, Jul 28, 8:24 PM CDT, 1 hour 8 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TOPEKA KS
824 PM CDT THU JUL 28 2011

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

0824 PM     TSTM WND GST     6 WSW OAK HILL          39.22N 97.45W
07/28/2011  E70 MPH          OTTAWA             KS   TRAINED SPOTTER

&&

BYRNE

Local storm report, Jul 28, 8:25 PM CDT, 1 hour 7 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TOPEKA KS
825 PM CDT THU JUL 28 2011

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

0824 PM     HAIL             6 WSW OAK HILL          39.22N 97.45W
07/28/2011  E1.00 INCH       OTTAWA             KS   TRAINED SPOTTER

&&

BYRNE

Local storm report, Jul 28, 8:27 PM CDT, 1 hour 5 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TOPEKA KS
827 PM CDT THU JUL 28 2011

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

0826 PM     HAIL             6 WSW OAK HILL          39.22N 97.45W
07/28/2011  M1.00 INCH       OTTAWA             KS   PUBLIC

0826 PM     TSTM WND GST     6 WSW OAK HILL          39.22N 97.45W
07/28/2011  E65 MPH          OTTAWA             KS   PUBLIC

&&

JL

Local storm report, Jul 28, 9:19 PM CDT, 13 minutes before

PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE TOPEKA KS
919 PM CDT THU JUL 28 2011

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

0755 PM     HAIL             1 NNE BENNINGTON        39.04N 97.58W
07/28/2011  E0.88 INCH       OTTAWA             KS   TRAINED SPOTTER

0814 PM     TSTM WND GST     2 NNE WELLS             39.16N 97.54W
07/28/2011  E70.00 MPH       OTTAWA             KS   PUBLIC

0814 PM     HAIL             2 NNE WELLS             39.16N 97.54W
07/28/2011  E1.00 INCH       OTTAWA             KS   PUBLIC

0816 PM     TSTM WND GST     2 NNE WELLS             39.16N 97.54W
07/28/2011  E80.00 MPH       OTTAWA             KS   TRAINED SPOTTER

0816 PM     HAIL             2 NNE WELLS             39.16N 97.54W
07/28/2011  E1.00 INCH       OTTAWA             KS   TRAINED SPOTTER

0824 PM     HAIL             6 WSW OAK HILL          39.22N 97.45W
07/28/2011  E1.00 INCH       OTTAWA             KS   TRAINED SPOTTER

0824 PM     TSTM WND GST     6 WSW OAK HILL          39.22N 97.45W
07/28/2011  E70.00 MPH       OTTAWA             KS   TRAINED SPOTTER

0826 PM     HAIL             6 WSW OAK HILL          39.22N 97.45W
07/28/2011  M1.00 INCH       OTTAWA             KS   PUBLIC

0826 PM     TSTM WND GST     6 WSW OAK HILL          39.22N 97.45W
07/28/2011  E65.00 MPH       OTTAWA             KS   PUBLIC

&&

BLAIR

Special weather statement, Jul 28, 9:32 PM CDT, 0 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TOPEKA KS
932 PM CDT THU JUL 28 2011

KSZ022-023-290300-
POTTAWATOMIE-RILEY-
932 PM CDT THU JUL 28 2011

...SIGNIFICANT WEATHER ADVISORY FOR CENTRAL RILEY AND WEST CENTRAL
POTTAWATOMIE COUNTIES...

THROUGH 1000 PM CDT...A STRONG THUNDERSTORM WILL MOVE EAST AT 25 MPH
ACROSS PORTIONS OF CENTRAL RILEY AND WEST CENTRAL POTTAWATOMIE
COUNTIES. NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THIS STORM
IS CAPABLE OF PRODUCING STRONG WINDS OF 40 TO 50 MPH.

SOME LOCATIONS THAT COULD BE AFFECTED INCLUDE RANDOLPH...TUTTLE
CREEK LAKE AND OLSBURG.

&&

LAT...LON 3952 9656 3930 9651 3927 9691 3948 9693
TIME...MOT...LOC 0232Z 262DEG 18KT 3937 9685

BLAIR

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 28, 7:08 PM CDT	Severe Thunderstorm Warning	TOP	Lyon, Wabaunsee	37 min
Jul 28, 7:30 PM CDT	Severe Thunderstorm Warning	TOP	Lyon, Osage, Wabaunsee	23 min
Jul 28, 7:45 PM CDT	Special Weather Statement	TOP	Ottawa	30 min
Jul 28, 8:09 PM CDT	Severe Thunderstorm Warning	TOP	Ottawa	36 min
Jul 28, 9:44 PM CDT	Severe Thunderstorm Warning	TOP	Pottawatomie, Riley	31 min
Jul 28, 10:13 PM CDT	Severe Thunderstorm Warning	TOP	Pottawatomie	32 min
Jul 29, 3:51 AM CDT	Excessive Heat Watch	TOP	Anderson, Brown, Clay, Cloud, Coffey, Dickinson and 17 more	12 hr
Jul 29, 3:43 PM CDT	Excessive Heat Warning	TOP	Anderson, Brown, Clay, Cloud, Coffey, Dickinson and 17 more	5 days
Jul 29, 3:50 PM CDT	Severe Thunderstorm Warning	TOP	Dickinson, Morris	40 min
Jul 29, 4:33 PM CDT	Special Weather Statement	TOP	Geary	27 min
Jul 29, 6:16 PM CDT	Special Weather Statement	TOP	Pottawatomie	44 min
Jul 29, 6:48 PM CDT	Special Weather Statement	TOP	Franklin	27 min
Jul 29, 6:59 PM CDT	Severe Thunderstorm Warning	TOP	Jackson, Nemaha, Pottawatomie	29 min

Nearby

Special Weather Statements in Kansas, 2011 Every special weather statement in 2011

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.