Thunderstorms which had formed in Oklahoma during the afternoon of the 12th moved across northwest Arkansas late on the evening of the 12th and during the wee hours of the 13th.
Every event with a place to put it. Tap one for its entry below.
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 LZK wrote it up.
Thunderstorms which had formed in Oklahoma during the afternoon of the 12th moved across northwest Arkansas late on the evening of the 12th and during the wee hours of the 13th.
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 Little Rock, AR wrote its last area forecast discussion before the first event at Jul 12, 11:23 PM CST, 7 minutes earlier.
AREA FORECAST DISCUSSION...UPDATED NATIONAL WEATHER SERVICE LITTLE ROCK AR 1223 AM CDT WED JUL 13 2011 .AVIATION... SCATTERED TSRA ACROSS NORTHERN ARKANSAS AND SOUTHERN MISSOURI... WHICH WILL MOVE SLOWLY SOUTH TONIGHT AS BOUNDARY MOVES SOUTH. DUE TO UNCERTAINTY OF TIMING/MOVEMENT...HAVE VCSH/VCTS THROUGH MID MORNING...AND PROB30 FOR AFTERNOON CONVECTION. ONE SHORT RANGE MODEL HAS CONVECTION WIDESPREAD AROUND SUNRISE...AND LASTING THROUGH THE MID AFTERNOON...WHILE ANOTHER HAS NO CONVECTION. WITH ONGOING CONVECTION...HAVE GONE WITH MORE THUNDERSTORM COVERAGE. && .PREV DISCUSSION... /ISSUED 238 PM CDT TUE JUL 12 2011/ SHORT TERM...TONIGHT THROUGH FRIDAY NIGHT TWO MAIN FEATURES WILL CONTROL THE WEATHER OVER ARKANSAS FOR THE NEXT FEW DAYS. THE FIRST IS THE DOMINATE UPPER RIDGE WHICH IS CENTERED OVER THE MISSISSIPPI RIVER VALLEY AND RESPONSIBLE FOR THE MISERABLY HOT CONDITIONS OVER THE NATURAL STATE. AREAS IN THE ARKANSAS RIVER VALLEY AND JUST ALONG THE ERN ESCARPMENT OF THE OZARK AND OUACHITA MOUNTAINS WERE AROUND 102 DEGREES AS OF 1 PM THANKS TO DOWNSLOPING WESTERLY SFC WINDS. HIGHS TODAY SHOULD TOP 100 DEGREES MOST EVERYWHERE...SAVE POSSIBLY A FEW SPOTS IN THE ELEVATED TERRAIN OF NW ARKANSAS. THIS RIDGE WILL RETROGRADE TO THE WEST SLIGHTLY AS AN UPPER WAVE...THE AFOREMENTIONED SECOND WEATHER FEATURE...SLIDES OVER TOP OF THE RIDGE OVER THE NEXT 24-36 HOURS. STILL...IT WILL BE CLOSE/STRONG ENOUGH TO KEEP CONDITIONS TOASTY ACROSS ARKANSAS. AS ALLUDED TO ABOVE...A SLOW-MOVING UPPER LEVEL DISTURBANCE OVER CENTRAL OKLAHOMA THIS AFTERNOON WILL TOP THE RIDGE TONIGHT AND SLIDE ACROSS ARKANSAS ON WEDNESDAY. WE ORIGINALLY HAD ONLY SLIGHT CHANCE POPS MENTIONED OVERNIGHT FOR THE NW HALF OF THE FORECAST AREA. HOWEVER...THIS FEATURE MANAGED TO SUSTAIN TSTMS IN THE TX PANHANDLE LAST NIGHT WELL BEYOND THE NORMAL DIURNAL TIME LINE OF SUMMERTIME CONVECTION. I BELIEVE IT WILL DO THE SAME THING TONIGHT AS IT APPROACHES ARKANSAS AND HAVE INCREASED POPS IN THE NW TO 30-40 PERCENT TO ACCOUNT FOR EXPECTED CONVECTIVE DEVELOPMENT LATER TONIGHT. TOMORROW AND THURSDAY THE DISTURBANCE WILL BE OVERHEAD AND WILL LEAD TO SCATTERED AFTERNOON THUNDERSTORMS ACROSS THE STATE. WITH REGARD TO THE HEAT...HAVE EXTENDED THE HEAT ADVISORY THROUGH TO WEDNESDAY EVENING. WHILE CLOUD COVER WILL INCREASE TOMORROW...AND SCT TSTMS WILL BE PRESENT...I BELIEVE THERE WILL BE ENOUGH HEATING BEFORE/BETWEEN STORMS AND ENOUGH OF AN INCREASE IN DEW POINTS TO WARRANT EXTENDING THE ADVISORY TO TOMORROW. HIGHS MAY BE 2-3 DEGREES COOLER TOMORROW BUT HEAT INDICES WILL STILL BE IN THE 100-105 DEGREE RANGE MOST EVERYWHERE. THAT BEING SAID...WILL CONTINUE TO LEAVE OUT THE NRN TWO TIERS OF COUNTIES AS HEAT INDICES WILL FALL JUST SHY OF ADVISORY CRITERIA THERE. THU AND FRI WILL BE SLIGHTLY COOLER THAN TOMORROW...GENERALLY UPPER 90S TO AROUND 100....HOWEVER WITH OVERNIGHT LOWS IN THE UPPER 70S THIS SLIGHT DECREASE IN AFTERNOON HIGHS WILL MEAN LITTLE RELIEF. FURTHERMORE THE UPPER RIDGE WILL RE-STRENGTHEN GOING BACK INTO THE WEEKEND FOR CONTINUED HOT CONDITIONS. LONG TERM...SATURDAY THROUGH TUESDAY STRONG UPPER LEVEL RIDGE WILL REMAIN FAIRLY STATIONARY...EXTENDING FROM WEST TEXAS TO THE GREAT LAKES REGION DURING THIS PERIOD. IF THIS RIDGE IS WEAKER THAN EXPECTED...OR ESTABLISHES ITSELF FARTHER TO THE NORTH...IMPULSES ROTATING AROUND THE RIDGE COULD AFFECT SOUTHERN SECTIONS OF THE FORECAST AREA DURING THIS TIME PERIOD...PROMOTING WIDELY SCATTERED...DIURNALLY ENHANCED CONVECTION. OTHERWISE...DANGEROUS HEAT STRESS CONDITIONS SHOULD CONTINUE. && .LZK WATCHES/WARNINGS/ADVISORIES... HEAT ADVISORY UNTIL 8 PM CDT THIS EVENING FOR ARKANSAS-BRADLEY- CALHOUN-CLARK-CLEBURNE-CLEVELAND-CONWAY-DALLAS-DESHA-DREW- FAULKNER-GARLAND-GRANT-HOT SPRING-INDEPENDENCE-JACKSON-JEFFERSON- JOHNSON-LINCOLN-LOGAN-LONOKE-MONROE-MONTGOMERY-OUACHITA-PERRY- PIKE-POLK-POPE-PRAIRIE-PULASKI-SALINE-SCOTT-SHARP-VAN BUREN- WHITE-WOODRUFF-YELL. && AVIATION...58
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE LITTLE ROCK AR 500 AM CDT TUE JUL 12 2011 ARZ003>007-012>016-021>025-030>034-037>047-052>057-062>069-131000- ARKANSAS-BAXTER-BOONE-BRADLEY-CALHOUN-CLARK-CLEBURNE-CLEVELAND- CONWAY-DALLAS-DESHA-DREW-FAULKNER-FULTON-GARLAND-GRANT-HOT SPRING- INDEPENDENCE-IZARD-JACKSON-JEFFERSON-JOHNSON-LINCOLN-LOGAN-LONOKE- MARION-MONROE-MONTGOMERY-NEWTON-OUACHITA-PERRY-PIKE-POLK-POPE- PRAIRIE-PULASKI-SALINE-SCOTT-SEARCY-SHARP-STONE-VAN BUREN-WHITE- WOODRUFF-YELL- 500 AM CDT TUE JUL 12 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR A LARGE PART OF ARKANSAS. .DAY ONE...TODAY AND TONIGHT VERY HOT AND HUMID CONDITIONS WILL CONTINUE TODAY WITH HEAT ADVISORIES IN EFFECT FOR MUCH OF ARKANSAS. HEAT INDEX VALUES WILL AGAIN RISE ABOVE 105 DEGREES FOR SEVERAL HOURS THIS AFTERNOON. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY SOME MINOR RELIEF IN THE VERY HOT TEMPERATURES IS EXPECTED FOR THE LATTER HALF OF THE WORK WEEK AS THE PERSISTENT UPPER LEVEL HIGH WEAKENS. THIS WILL ALLOW SEVERAL UPPER LEVEL IMPULSES TO PASS ACROSS ARKANSAS...RESULTING IN ISOLATED TO SCATTERED SHOWERS AND THUNDERSTORMS EACH AFTERNOON AND EVENING. WIDESPREAD AND ORGANIZED SEVERE WEATHER IS NOT EXPECTED...THOUGH ANY STORM THAT DOES FORM COULD BECOME STRONG TO SEVERE WITH DAMAGING WINDS THE GREATEST THREAT. DRY AND VERY HOT CONDITIONS WILL RETURN OVER THE WEEKEND AND EARLY NEXT WEEK AS THE UPPER HIGH AGAIN STRENGTHENS ACROSS THE NATURAL STATE. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION IS NOT ANTICIPATED. && VISIT NWS LITTLE ROCK ON THE WEB. GO TO HTTP://WEATHER.GOV AND CLICK ON CENTRAL ARKANSAS. 44
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE LITTLE ROCK AR
853 PM CDT TUE JUL 12 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0455 PM TSTM WND DMG 5 S HAMPTON 33.47N 92.47W
07/12/2011 CALHOUN AR LAW ENFORCEMENT
TREES AND POWER LINES REPORTED DOWN ALONG CO RD 26.
&&
224SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE LITTLE ROCK AR 1227 AM CDT WED JUL 13 2011 ARZ003-004-130610- BOONE AR-MARION AR- 1227 AM CDT WED JUL 13 2011 ...SIGNIFICANT WEATHER ADVISORY FOR WESTERN MARION AND BOONE COUNTIES UNTIL 115 AM CDT... AT 1225 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR WAS TRACKING A STRONG THUNDERSTORM 2 MILES SOUTHEAST OF HARRISON...MOVING NORTHEAST AT 15 MPH. SMALL HAIL UP TO THE SIZE OF PENNIES AND WIND GUSTS UP TO 40 MPH ARE EXPECTED WITH THIS STORM. BRIEF HEAVY RAIN AND DANGEROUS LIGHTNING WILL ALSO BE POSSIBLE. * LOCATIONS IMPACTED INCLUDE... HARRISON... WININGTON... WILLIS... SELF... MYRTLE... LEAD HILL... LAKEWAY... DODD CITY... CLARK HILL... CAPPS... BERGMAN... ZINC... SOUTH LEAD HILL... SNOW... RIDGEWAY... MONARCH... BELLEFONTE... BATAVIA... IF THREATENING WEATHER APPROACHES YOUR AREA...TAKE SHELTER IN A STURDY BUILDING. LAT...LON 3631 9272 3613 9310 3630 9328 3650 9308 TIME...MOT...LOC 0526Z 233DEG 11KT 3623 9309 59
The Springfield radar (KSGF), 115 km away, was scanning. The volume nearest the first event began at 05:30 UTC.
1 thunderstorm wind. Local standard time, as filed.
Trees and power lines were blown down on Pine St. and Union Rd., damaging several vehicles. Part of a metal roof was blown off.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Arkansas in 2011Every state in 2011This day in weather historyWarnings in Arkansas, 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: 309927.