Decaying thunderstorms produced a large area of strong outflow winds which moved across southern Nebraska overnight, resulting in a 68 mph wind gust at the McCook airport, and tree damage in town.
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Deaths and injuries are direct and indirect together, as the offices filed them. Damage is property and crops in the dollars of the year, not adjusted for inflation, and only where an office estimated it.
The episode as NWS GLD wrote it up.
Decaying thunderstorms produced a large area of strong outflow winds which moved across southern Nebraska overnight, resulting in a 68 mph wind gust at the McCook airport, and tree damage in town.
The local office's own words before the first event, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Goodland, KS wrote its last area forecast discussion before the first event at Jul 11, 10:50 PM CST, 16 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE GOODLAND KS 1050 PM MDT MON JUL 11 2011 .DISCUSSION... 200 PM MDT MON JUL 11 2011 TONIGHT-THURSDAY NIGHT...UPPER HIGH CURRENTLY CENTERED OVER TENNESSEE WILL PUSH TOWARD THE WEST AND EXPAND OVER THE CENTRAL AND SOUTHERN PLAINS WHILE AN UPPER LEVEL LOW AND ASSOCIATED TROUGH REMAIN ACROSS THE PACIFIC WEST/NORTHWEST. MONSOONAL MOISTURE WILL CONTINUE AS WILL DAILY CHANCES FOR SHOWERS AND THUNDERSTORMS. ALONG WITH THE THREAT OF SEVERE WEATHER WILL BE FLOODING/FLASH FLOODING...ESPECIALLY ACROSS THE NORTHWEST 1/2-1/3 OF THE AREA WHERE 1 AND 3 HOUR FLASH FLOOD GUIDANCE BELOW 2 INCHES WHILE ACROSS FAR SOUTHWEST NEBRASKA 1/3/6 HOUR GUIDANCE BELOW 1.7 INCHES. HIGH TEMPERATURES TUESDAY AND WEDNESDAY IN THE UPPER 80S NORTHWEST TO UPPER 90S FAR EAST...LOW 90S NORTHWEST TO NEAR 104 HILL CITY TO LEOTI THURSDAY. FRIDAY-MONDAY...UPPER LEVEL RIDGE WILL BE OVER THE AREA THROUGH THE PERIOD. 850 TEMPERATURES SUPPORT DAILY HIGH TEMPERATURES WELL INTO THE 90S AND LOW 100S. IT APPEARS THAT AREAL COVERAGE OF SHOWERS AND THUNDERSTORMS WILL DIMINISH A BIT WITH BETTER 700-300 MOISTURE GETTING PUSHED BACK INTO COLORADO BY THE END OF THE PERIOD. 007 && .AVIATION... 1050 PM MDT MON JUL 11 2011 FOR THE 06Z TAFS...VFR CONDITIONS EXPECTED TO PREVAIL AT BOTH KMCK AND KGLD THROUGH EFFECTIVE TAF PERIOD. A FEW SHOWERS/THUNDERSTORMS WILL BE POSSIBLE AT BOTH TERMINALS EARLY IN THE TAF PERIOD...WITH RADAR INDICATING MAIN AREA OF SHOWERS/THUNDERSTORMS MOVING NORTH OF KMCK...AND IS NOT EXPECTED TO PASS DIRECTLY OVER TERMINAL. ACTIVITY MAY LINGER WITHIN VICINITY OF KMCK THROUGH ABOUT 10Z BASED ON SHORT RANGE GUIDANCE. REDEVELOPMENT IS POSSIBLE AS EARLY AS 21Z TUE AT BOTH TERMINALS...HOWEVER GUIDANCE HAS BEEN TOO EARLY ON PRODUCING CONVECTION THE PAST FEW DAYS WITH CURRENT PATTERN...AND BETTER CHANCES TUE APPEAR TO BE NORTH AND WEST. FOR NOW HAVE KEPT CB GROUP STARTING 21-22Z TUE...WITH VCTS GROUPS AFTER 00-01Z. DR && .GLD WATCHES/WARNINGS/ADVISORIES... KS...NONE. NE...NONE. CO...NONE. &&
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE GOODLAND KS 245 PM MDT MON JUL 11 2011 COZ090>092-KSZ001>004-013>016-027>029-041-042-NEZ079>081-121200- YUMA-KIT CARSON-CHEYENNE CO-CHEYENNE KS-RAWLINS-DECATUR-NORTON- SHERMAN-THOMAS-SHERIDAN-GRAHAM-WALLACE-LOGAN-GOVE-GREELEY-WICHITA- DUNDY-HITCHCOCK-RED WILLOW- 245 PM MDT MON JUL 11 2011 /345 PM CDT MON JUL 11 2011/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR EXTREME SOUTHWEST NEBRASKA...NORTHWEST KANSAS AND EAST CENTRAL COLORADO. .DAY ONE...THIS AFTERNOON AND TONIGHT AREAL COVERAGE OF SHOWERS AND THUNDERSTORMS WILL INCREASE THROUGH MIDNIGHT...MAINLY ALONG AND WEST OF A LINE FROM BURLINGTON TO MCCOOK. THE REMAINDER OF THE AREA WILL HAVE AT LEAST A CHANCE FOR PRECIPITATION. SEVERE WEATHER IS POSSIBLE WITH LARGE HAIL...DAMAGING WINDS AND LOCALLY HEAVY RAINFALL EXPECTED. THERE IS A THREAT FOR FLASH FLOODING ACROSS THE ENTIRE AREA GIVEN HIGH MOISTURE AVAILABILITY AND SLOW STORM MOVEMENTS BUT FOR THOSE ALONG AND WEST OF A BURLINGTON TO MCCOOK LINE THE THREAT IS HIGHER GIVEN RECENT RAINFALL THE PAST FEW DAYS. .DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY THE THREAT FOR SEVERE WEATHER AND FLASH FLOODING CONTINUES TUESDAY AFTERNOON AND NIGHT AS WELL AS WEDNESDAY AFTERNOON AND NIGHT...MAINLY WEST OF A LINE FROM TRENTON TO BURLINGTON. FOR THURSDAY THROUGH MONDAY OVERALL COVERAGE OF SHOWERS AND THUNDERSTORMS WILL BE LESS BUT TEMPERATURES WILL BE HOT WITH NUMEROUS LOCATIONS AT OR ABOVE 100 DEGREES. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE REQUIRED. 007
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GOODLAND KS
909 PM MDT MON JUL 11 2011
NEZ079-120345-
DUNDY-
909 PM MDT MON JUL 11 2011
...THE NATIONAL WEATHER SERVICE IN GOODLAND HAS ISSUED A SIGNIFICANT
WEATHER ADVISORY FOR DUNDY COUNTY IN SOUTHWEST NEBRASKA...
AT 907 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 11 MILES EAST OF ALVIN...MOVING NORTHEAST AT 40
MPH.
PENNY TO NICKEL SIZE HAIL...AND WINDS TO 50 MPH ARE EXPECTED WITH
THIS STORM.
BE PREPARED TO TAKE SHELTER IN THE EVENT THESE STORMS INTENSIFY AND
BECOME SEVERE.
&&
LAT...LON 4035 10162 4015 10183 4025 10205 4035 10204
4036 10203 4035 10163
TIME...MOT...LOC 0309Z 216DEG 35KT 4027 10186
BULLERSPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE GOODLAND KS
944 PM MDT MON JUL 11 2011
NEZ079-120415-
DUNDY-
944 PM MDT MON JUL 11 2011
...THE NATIONAL WEATHER SERVICE IN GOODLAND HAS ISSUED A SIGNIFICANT
WEATHER ADVISORY FOR DUNDY COUNTY IN SOUTHWEST NEBRASKA...
AT 940 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A
STRONG THUNDERSTORM 9 MILES NORTH OF PARKS...MOVING NORTH AT 30 MPH.
A LARGE AMOUNT OF SMALL HAIL...TORRENTIAL RAINFALL...AND WINDS TO 50
MPH ARE EXPECTED WITH THIS STORM. RAINFALL AMOUNTS OF A HALF INCH TO
AN INCH COULD OCCUR IN A SHORT TIME.
BE PREPARED TO TAKE SHELTER IN THE EVENT THESE STORMS INTENSIFY AND
BECOME SEVERE.
&&
LAT...LON 4010 10164 4008 10187 4035 10193 4035 10166
4035 10165
TIME...MOT...LOC 0343Z 174DEG 28KT 4019 10177
BULLERThe Goodland radar (KGLD), 133 km away, was scanning. The volume nearest the first event began at 05:06 UTC.
1 thunderstorm wind. Local standard time, as filed.
Numerous large tree limbs were downed across the city of McCook.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Nebraska in 2011Every state in 2011This day in weather historyWarnings in Nebraska, July 2011
NOAA National Centers for Environmental Information, Storm Events Database, compiled from the National Weather Service’s monthly Storm Data. Complete through 2026-06; NCEI adds each month about 75 days after it ends and revises past years a few times a year. Rebuilt 2026-09-24. Each event’s entry at NCEI: 318842.