Alert archive / Kansas / Special Weather Statements in 2011
Special Weather Statement, NWS Topeka, KS
NWS Topeka, KS issued this special weather statement at May 11, 2011, 5:39 PM CDT for Lyon County, Kansas. It was in force for 36 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 11, 2011, 5:39 PM CDT (22:39 UTC)
- Expired
- May 11, 2011, 6:15 PM CDT
- In force
- 36 min
- Issued by
- NWS Topeka, KS
County Lyon County, KS
The radar
The Topeka radar (KTWX), 76 km from the middle of the area, began a volume at 22:42 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 12:00Z, 10.7 hours before the alert went out and 87 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.
- Mixed-layer CAPE
- 2161 J/kg
- Mixed-layer CIN
- -95 J/kg
- Mixed-layer LCL
- 1016 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- -22 m²/s²
- 0-3 km storm-relative helicity
- 99 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 3.5
The text
As transmitted, in the capitals the NWS used until 2016.
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</html>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 11, 3:43 PM CDT, 1 hour 56 minutes earlier.
Area forecast discussion, May 11, 3:43 PM CDT, 1 hour 56 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE TOPEKA KS 343 PM CDT WED MAY 11 2011 .DISCUSSION... A SHORTWAVE ROUNDING THE BASE OF THE UPPER LEVEL CLOSED LOW IS EXPECTED TO LIFT INTO THE CENTRAL PLAINS THIS EVENING WITH THE CLUSTER OF THUNDERSTORMS OVER OK MOVING ACROSS EASTERN KS. 18Z SOUNDINGS SHOWS MORE THAN ENOUGH CAPE FOR SEVERE STORMS...HOWEVER A RELATIVELY WEAK WIND FIELD AND LIMITED DEEP LAYER SHEAR SUGGEST ORGANIZED UPDRAFTS ARE LESS LIKELY. THEREFORE THINK THE STORM STRUCTURE WILL REMAIN MULTI-CELLULAR AS STORMS MOVE ACROSS THE AREA LATE THIS AFTERNOON AND EARLY IN THE EVENING. THIS SHOULD LEAD TO MAINLY A HAIL AND WIND HAZARD. CONTINUED WITH LIKELY POPS THROUGH THE EVENING ACROSS EASTERN KS WHERE THE OK CLUSTER IS MOST LIKELY TO MOVE UNTIL THE SHORTWAVE LIFTS NORTH. THEN THINK A STABILIZING BOUNDARY LAYER SHOULD BRING QUIETER WEATHER OVERNIGHT. WITH THE MODELS TRENDING FURTHER WEST WITH THE SFC LOW AND FRONT...HAVE BUMPED UP TONIGHT/S MIN TEMPS ACROSS EASTERN KS KEEPING THEM IN THE LOWER TO MIDDLE 60S. HIGHS TOMORROW WILL DEPEND ON HOW MUCH INSOLATION WE RECEIVE...BUT THINK LOWER 80S MAY NOT BE OUT OF THE QUESTION. CONTINUED WITH A CHANCE FOR AFTERNOON THUNDERSTORMS THURSDAY WITH STEEPENING LAPSE RATES UNDERNEATH THE CLOSED LOW. THIS SHOULD FAVOR THE DEVELOPMENT OF SCATTERED SHOWERS AND STORMS WITHIN THE HEATING OF THE DAY. THERE MAY BE ENOUGH INSTABILITY DEVELOP FOR SOME STORMS TO PRODUCE HAIL OVER PARTS OF EAST CENTRAL AND NORTHEAST KS. HOWEVER AGAIN THE DEEP LAYER SHEAR LOOKS EVEN WEAKER THURSDAY AFTERNOON SO IT IS UNCERTAIN HOW ORGANIZED ANY STORMS MAY BE. WOLTERS THURSDAY NIGHT THROUGH FRIDAY...SURFACE AND UPPER LEVEL LOW PROGGED TO MOVE SOUTHEAST INTO SOUTHERN MISSOURI OR NORTHERN ARKANSAS THROUGH THE DAY FRIDAY. COLD FRONT SHOULD ALSO PASS THROUGH THURSDAY EVENING ALONG WITH COOLER TEMPERATURES AND DRIER CONDITIONS. WITH THE SOUTHEASTERN DIVE OF THE UPPER LEVEL SYSTEM...MOST OF THE CWA WILL REMAIN IN THE MOIST AIR...AND THUS WILL CONTINUE WITH PRECIPITATION CHANCES THURSDAY NIGHT THROUGH THE AFTERNOON HOURS FRIDAY. BETTER CONVECTIVE PARAMETERS SUGGEST THUNDERSTORM CHANCES WILL CONTINUE THROUGH THE OVERNIGHT HOURS THURSDAY INTO EARLY FRIDAY. HOWEVER...MINIMAL SHEAR...UNIMPRESSIVE LAPSE RATES AND LITTLE TO NO INSTABILITY DUE TO CLOUDY SKIES POINT MAINLY TO SCATTERED SHOWERS OCCURRING ACROSS THE CWA DURING THE DAY FRIDAY AS THE UPPER MAIN UPPER LEVEL SYSTEM EXITS THE AREA. FRIDAY NIGHT INTO SUNDAY MORNING...SURFACE RIDGING ALONG WITH WEAK UPPER LEVEL RIDGE MOVE INTO THE CWA LATE FRIDAY NIGHT AND INTO SATURDAY. CLOUDS WILL BE SLOW TO CLEAR OUT ACROSS THE AIR WITH COLD AIR ADVECTION AND AMPLE LOW LEVEL MOISTURE STILL IN PLACE...BUT DO EXPECT SKIES TO BECOME AT LEAST PARTLY CLOUDY BY LATE SATURDAY AFTERNOON. BELOW NORMAL TEMPERATURES ARE EXPECTED TO CONTINUE THROUGH THE WEEKEND WITH HIGHS IN THE 60'S AND LOWS IN THE UPPER 30'S AND LOW 40'S. AT THIS TIME...FROST DOES NOT APPEAR TO BE A CONCERN WITH DEWPOINTS REMAINING IN THE UPPER 30'S...BUT LATER MODEL RUNS WILL HAVE TO MONITORED REGARDING LOW TEMPERATURES OVER THE WEEKEND. SUNDAY THROUGH MONDAY MORNING...SECONDARY CLOSED LOW WILL DIVE SOUTH OUT OF CANADA...AND WILL BECOME THE PRIMARY SYSTEM OVER THE REGION AS IT LIFTS THE SYSTEM OVER THE OHIO RIVER VALLEY NORTH AND WEAKENS IT. MOST OF THE ENERGY SHOULD REMAIN TO THE EAST OF THE CWA...AND WITH A LACK OF MOISTURE RETURN...PRECIPITATION CHANCES WILL BE LIMITED TO THE NORTHEAST PORTIONS OF THE CWA. MONDAY THROUGH WEDNESDAY...SECONDARY SYSTEM MOVES SOUTHEAST AND HIGH AMPLITUDE RIDGE BEGINS TO BUILD IN FROM THE WEST. TEMPERATURES WILL SLOWLY RETURN CLOSER TO NORMAL BY MID WEEK...AND A SLIGHT CHANCE OR THUNDERSTORMS RETURNS BY WEDNESDAY NIGHT FOR THE FAR WESTERN COUNTIES AS THE NEXT CLOSED LOW IS PROGGED TO MOVE OUT ONTO THE PLAINS LATE WEDNESDAY NIGHT INTO THURSDAY. BYRNE && .AVIATION... TIMING OF TS INTO THE TERMINALS WILL BE TRICKY. HAVE INCLUDED A TEMPO FOR THE BEST GUESS WHEN STORMS MAY ENTER THE AREA BASED ON A CONSENSUS OF MODEL OUTPUT AND CURRENT RADAR TRENDS. OUTSIDE OF THE TS THINK CONDITIONS WILL REMAIN VFR. IF TS GET INTO THE TERMINALS IFR VSBY WITH WIND GUSTS UP TO 40 MPH ARE LIKELY FROM HEAVY RAINFALL. WOLTERS && .TOP WATCHES/WARNINGS/ADVISORIES... NONE. &&
Hazardous weather outlook, May 11, 4:29 PM CDT, 1 hour 10 minutes before
HAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE TOPEKA KS 429 PM CDT WED MAY 11 2011 KSZ008>012-020>024-026-034>040-054>056-058-059-122130- REPUBLIC-WASHINGTON-MARSHALL-NEMAHA-BROWN-CLOUD-CLAY-RILEY- POTTAWATOMIE-JACKSON-JEFFERSON-OTTAWA-DICKINSON-GEARY-MORRIS- WABAUNSEE-SHAWNEE-DOUGLAS-LYON-OSAGE-FRANKLIN-COFFEY-ANDERSON- 429 PM CDT WED MAY 11 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR EAST CENTRAL...NORTH CENTRAL AND NORTHEAST KANSAS. .DAY ONE...TONIGHT. SCATTERED STRONG TO SEVERE THUNDERSTORMS WILL REMAIN POSSIBLE THROUGH 10 PM CDT. SOME STORMS COULD PRODUCE HAIL UP TO THE SIZE OF QUARTERS AND WIND GUSTS UP TO 60 MPH. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY. THUNDERSTORMS WILL ALSO BE POSSIBLE THURSDAY THROUGH FRIDAY AFTERNOON. SOME THUNDERSTORMS COULD BE SEVERE THURSDAY NEAR AND EAST OF HIGHWAY 75. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED THROUGH THIS EVENING.
In the hours before
Local storm report, May 11, 12:53 PM CDT, 4 hours 46 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TOPEKA KS
1253 PM CDT WED MAY 11 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1251 PM HAIL 3 S GREENLEAF 39.68N 96.98W
05/11/2011 E0.75 INCH WASHINGTON KS TRAINED SPOTTER
&&
MRCSpecial weather statement, May 11, 12:56 PM CDT, 4 hours 43 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE TOPEKA KS 1256 PM CDT WED MAY 11 2011 KSZ009-010-111830- MARSHALL-WASHINGTON- 1256 PM CDT WED MAY 11 2011 ...SIGNIFICANT WEATHER ADVISORY FOR NORTHWESTERN MARSHALL AND EASTERN WASHINGTON COUNTIES... THROUGH 130 PM CDT...A CLUSTER OF STRONG THUNDERSTORMS WILL MOVE NORTH AT 45 MPH ACROSS PORTIONS OF NORTHWESTERN MARSHALL AND EASTERN WASHINGTON COUNTIES. NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THESE STORMS ARE CAPABLE OF PRODUCING PENNY SIZE HAIL AND STRONG WINDS OF 40 TO 50 MPH. SOME LOCATIONS THAT COULD BE AFFECTED INCLUDE HANOVER...BREMEN...HOLLENBURG AND OKETO. A SEVERE THUNDERSTORM WATCH IS ALSO IN EFFECT. && LAT...LON 4001 9657 3963 9681 3966 9713 4000 9702 TIME...MOT...LOC 1755Z 200DEG 38KT 3977 9687
Local storm report, May 11, 1:01 PM CDT, 4 hours 38 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TOPEKA KS
101 PM CDT WED MAY 11 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1239 PM HAIL 3 NW MINNEAPOLIS 39.15N 97.75W
05/11/2011 E0.75 INCH OTTAWA KS PUBLIC
&&
MRCLocal storm report, May 11, 1:28 PM CDT, 4 hours 11 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE TOPEKA KS
128 PM CDT WED MAY 11 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0111 PM HAIL 1 E BREMEN 39.90N 96.77W
05/11/2011 E1.00 INCH MARSHALL KS PUBLIC
&&
MRCSpecial weather statement, May 11, 5:39 PM CDT, 0 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE TOPEKA KS
539 PM CDT WED MAY 11 2011
KSZ054-112315-
LYON-
539 PM CDT WED MAY 11 2011
...SIGNIFICANT WEATHER ADVISORY FOR LYON COUNTY...
THROUGH 615 PM CDT...A STRONG THUNDERSTORM WILL MOVE NORTH AT 45 MPH
ACROSS PORTIONS OF LYON COUNTY. 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
AMERICUS...EMPORIA...READING...ADMIRE AND ALLEN. MOTORISTS ALONG THE
KANSAS TURNPIKE BETWEEN MILE MARKERS 121 AND 148 COULD ALSO BE
AFFECTED. MOTORISTS ALONG INTERSTATE 35 BETWEEN MILE MARKERS 128 AND
143 COULD ALSO BE AFFECTED.
A SEVERE THUNDERSTORM WATCH IS ALSO IN EFFECT.
&&
LAT...LON 3817 9633 3867 9624 3867 9595 3826 9595
3826 9596 3817 9596 3817 9624
TIME...MOT...LOC 2239Z 196DEG 37KT 3835 9610The office that day
Everything else NWS Topeka, KS issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 10, 7:44 PM CDT | Special Weather Statement | TOP | Morris | 16 min |
| May 11, 12:00 PM CDT | Severe Thunderstorm Warning | TOP | Cloud, Ottawa | 45 min |
| May 11, 12:44 PM CDT | Severe Thunderstorm Warning | TOP | Clay, Cloud, Ottawa, Republic, Washington | 31 min |
| May 11, 12:56 PM CDT | Special Weather Statement | TOP | Washington | 34 min |
| May 11, 1:04 PM CDT | Severe Thunderstorm Warning | TOP | Marshall, Washington | 27 min |
| May 11, 5:12 PM CDT | Severe Thunderstorm Warning | TOP | Coffey, Lyon | 33 min |
| May 11, 6:40 PM CDT | Special Weather Statement | TOP | Douglas | 35 min |
| May 11, 6:44 PM CDT | Special Weather Statement | TOP | Brown | 31 min |
| May 11, 6:50 PM CDT | Severe Thunderstorm Warning | TOP | Brown | 25 min |
Nearby
Special Weather Statements in Kansas, 2011Every 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.