A cold front moved across eastern Iowa during the late evening hours of July 6, 2014 with scattered thunderstorms developing along and ahead of the cold front. One of these thunderstorms produced a brief tornado as it moved into southwestern Benton County 7 miles north of the town of Keystone.
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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 DVN wrote it up.
A cold front moved across eastern Iowa during the late evening hours of July 6, 2014 with scattered thunderstorms developing along and ahead of the cold front. One of these thunderstorms produced a brief tornado as it moved into southwestern Benton County 7 miles north of the town of Keystone. The brief tornado did not cause any damage.
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 Quad Cities, IA wrote its last area forecast discussion before the first event at Jul 6, 5:45 PM CST, 2 hours 11 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE QUAD CITIES IA IL 645 PM CDT SUN JUL 6 2014 .SYNOPSIS... ISSUED AT 229 PM CDT SUN JUL 6 2014 ANALYSIS AT 2 PM DEPICTS LOTS OF SCT-BKN-OVC LOW CLOUDS OVER THE FORECAST AREA LIMITING HEATING AHEAD OF THE FRONT. PRESSURE FALLS ARE MOVING SOUTH INTO AREA WITH AREA OF STORMS NORTH OF LACROSSE TO MOVE INTO NORTHERN PORTIONS OF THE FORECAST AREA AROUND 07/00Z. UPPER AIR PATTERN SHOWS PROGRESSIVE FORCING WITH SCT-BKN AREA OF STORMS TO MOVE ACROSS THE FORECAST AREA THIS EVENING WITH SOME SEVERE POSSIBLE. UPPER AIR ANALYSIS CONTINUES TO SHOW STRONG NW FLOW FOR A EVEN STRONGER DISTURBANCE AND FRONT TO ARRIVE LATE MONDAY WITH MORE PRECIPITATION CHANCES OF SHOWERS AND STORMS. THIS PATTERN APPEARS TO CONTINUE FOR THE NEXT 7 DAYS OF NW FLOW FOR PERIODS OF SHOWERS AND STORMS. && .SHORT TERM...(THIS EVENING THROUGH MONDAY) ISSUED AT 229 PM CDT SUN JUL 6 2014 TONIGHT...AN AREA OF THUNDERSTORMS ALONG A COLD FRONT WILL PASS THROUGH BEFORE MIDNIGHT WITH POPS 40-60 PERCENT SUGGESTED. LOCAL TOOLS SUGGEST GREATEST RISK OF SEVERE TO BE STRAIGHT LINE WINDS OF 60 TO POSSIBLY 70 MPH IN COOL POOLS UNTIL MID EVENING. ISOLATED LARGE HAIL MAY ALSO OCCUR UNTIL JUST AFTER SUNSET UP TO SIZE OF HALF DOLLARS...OR 1.25 INCHES IN DIAMETER. SHEAR PROFILE IS MARGINAL AT BEST FOR RISK OF TORNADOES UNLESS SFC WINDS BACK. RAIN TOTALS WITH SPEED OF MOVEMENT OF 30+ MPH SHOULD BE MOSTLY BELOW A HALF INCH WITH LOCALIZED AMOUNTS TO AROUND AN INCH. THIS SHOULD LIMIT OR HAVE NO IMPACTS TO AREA RIVERS...OR CAUSE FLASH FLOODING. MINS WITH CLEARING AFTER MIDNIGHT SHOULD SETTLE IN THE MID TO UPPER 60S. MONDAY...FAIR SKIES AND LIGHT NW WINDS OF 5-10 KTS WITH DEWPOINTS IN THE MID TO UPPER 60S. HIGHS MOSTLY IN THE MIDDLE 80S WITH SOME UPPER 80S SOUTH SECTIONS. A TYPICAL MID SUMMER DAY OF WARM AND A BIT HUMID. LOW POPS WILL DEVELOP AND ARRIVE IN WESTERN SECTIONS TOWARD LATE AFTERNOON WITH HEATING AND NEXT SHORT WAVE. .LONG TERM...(MONDAY NIGHT THROUGH SUNDAY) ISSUED AT 229 PM CDT SUN JUL 6 2014 THE NEXT ROUND OF SIGNIFICANT RAIN WILL OCCUR MONDAY NIGHT. BASED ON THE OVERALL FORCING/MOISTURE...ANOTHER THUNDERSTORM COMPLEX IS EXPECTED TO DEVELOP MONDAY EVENING AND MOVE GENERALLY EAST ALONG THE IA/MO BORDER. LOCALLY HEAVY RAINFALL IS POSSIBLE FOR AREAS SOUTH OF AN OSKALOOSA IOWA...TO PONTIAC ILLINOIS LINE. THE ORGANIZED THUNDERSTORM COMPLEX THAT DEVELOPS MONDAY EVENING WILL EXIT THE AREA TUESDAY MORNING. THE BETTER RAIN CHANCES WILL BE GENERALLY SOUTH OF A LINE FROM FREEPORT ILLINOIS TO KIRKSVILLE MISSOURI. CLOUDS WILL LIKELY SUPPRESS TEMPERATURES DURING THE MORNING BUT A RESPECTABLE JUMP IN TEMPERATURES SHOULD BE SEEN DURING THE AFTERNOON. QUIET AND DRY CONDITIONS WILL BE SEEN ACROSS THE AREA TUESDAY NIGHT AND WEDNESDAY AS HIGH PRESSURE BUILDS INTO THE GREAT LAKES. WEDNESDAY NIGHT ON... QUIET AND DRY CONDITIONS WILL CONTINUE WEDNESDAY NIGHT AND THURSDAY PER THE MODEL CONSENSUS AS THE GREAT LAKES HIGH MOVES TOWARD THE EAST COAST. STARTING THURSDAY NIGHT THE WEATHER PATTERN WILL AGAIN TURN ACTIVE ACROSS THE MIDWEST. ALTHOUGH THE MODELS DIFFER ON TIMING AND POSITION...THEY GENERALLY AGREE THAT TWO ROUNDS OF ORGANIZED THUNDERSTORM COMPLEXES WILL AFFECT THE AREA THURSDAY NIGHT AND FRIDAY NIGHT WITH THE COMPLEXES DISSIPATING ON FRIDAY AND SATURDAY. THE MODEL CONSENSUS HAS SLIGHT CHANCE TO CHANCE POPS THURSDAY NIGHT FOR AREAS ALONG/WEST OF THE MISSISSIPPI...AND THEN CHANCE POPS FRIDAY THROUGH SATURDAY FOR THE ENTIRE AREA. SATURDAY NIGHT INTO SUNDAY...THE MODELS DIVERGE AGAIN ON THEIR RESPECTIVE SOLUTIONS. AS SUCH THE MODEL CONSENSUS HAS SLIGHT CHANCE POPS FOR THE AREA. && .AVIATION...(FOR THE 00Z TAFS THROUGH 00Z MONDAY EVENING) ISSUED AT 622 PM CDT SUN JUL 6 2014 COLD FRONT PUSHING THROUGH THE AREA THIS EVENING IS GENERATING SCATTERED THUNDERSTORMS WHICH WILL THREATEN PRIMARILY THE CID AND DBQ TAFS. OTHER THAN LINGERING MVFR CIGS AND CIG/VSBY RESTRICTIONS ASSOCIATED WITH THE THUNDERSTORMS...VFR CONDITIONS SHOULD PREVAIL AT LEAST UNTIL THE NEXT ROUND OF STORMS CURRENTLY ANTICIPATED JUST AFTER THE 00Z/8TH END TIME OF THE CURRENT TAFS. WOLF && .HYDROLOGY... ISSUED AT 229 PM CDT SUN JUL 6 2014 MOST AREA TRIBUTARIES ACROSS EASTERN IOWA AND NORTHWEST ILLINOIS HAVE CRESTED AND ARE CURRENTLY FALLING. LOCALLY HEAVY RAINFALL SATURDAY IN THE ENGLISH RIVER BASIN HAS PUSHED THAT RIVER BACK INTO MINOR FLOOD. THE LOWER SKUNK RIVER IS STILL RISING TO A CREST. THERE WILL BE TWO ROUNDS OF RAIN OVER THE NEXT 48 HOURS. THE RAIN MONDAY NIGHT MAY BE HEAVY SOUTH OF INTERSTATE 80. A BREAK IN RAIN IS NOW EXPECTED FROM TUESDAY THROUGH SUNSET THURSDAY. MISSISSIPPI RIVER... MODERATE FLOODING IS CONTINUING ON THE MISSISSIPPI RIVER NORTH OF CAMANCHE. FROM CAMANCHE ON SOUTH TO KEOKUK...MAJOR FLOODING IS OCCURRING. AS OF THIS MORNING THE CREST WAS NEAR BURLINGTON IOWA. && .DVN WATCHES/WARNINGS/ADVISORIES... IA...NONE. IL...NONE. MO...NONE. && SYNOPSIS...NICHOLS SHORT TERM...NICHOLS LONG TERM...08 AVIATION...WOLF HYDROLOGY...08
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE QUAD CITIES IA IL 505 AM CDT SUN JUL 6 2014 IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007- 009-015>018-024>026-034-035-MOZ009-010-071000- BENTON IA-BUCHANAN IA-BUREAU IL-CARROLL IL-CEDAR IA-CLARK MO- CLINTON IA-DELAWARE IA-DES MOINES IA-DUBUQUE IA-HANCOCK IL- HENDERSON IL-HENRY IA-HENRY IL-IOWA IA-JACKSON IA-JEFFERSON IA- JO DAVIESS IL-JOHNSON IA-JONES IA-KEOKUK IA-LEE IA-LINN IA-LOUISA IA- MCDONOUGH IL-MERCER IL-MUSCATINE IA-PUTNAM IL-ROCK ISLAND IL- SCOTLAND MO-SCOTT IA-STEPHENSON IL-VAN BUREN IA-WARREN IL- WASHINGTON IA-WHITESIDE IL- 505 AM CDT SUN JUL 6 2014 THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF NORTH CENTRAL ILLINOIS...NORTHWEST ILLINOIS...WEST CENTRAL ILLINOIS...EAST CENTRAL IOWA...NORTHEAST IOWA...SOUTHEAST IOWA AND NORTHEAST MISSOURI. .DAY ONE...TODAY AND TONIGHT SCATTERED STORMS POSSIBLY PRODUCING HAIL UP TO 1 INCH IN DIAMETER AND LOCALLY HEAVY DOWNPOURS WILL BE POSSIBLE ALONG AND SOUTH OF HIGHWAY 34 THROUGH 8 AM CDT. THEN SCATTERED THUNDERSTORMS ARE LIKELY NORTHWEST OF A CEDAR RAPIDS TO DUBUQUE LINE BY LATE AFTERNOON...AND THEN WILL SPREAD DOWN ACROSS THE REST OF THE OUTLOOK AREA DURING THE EVENING. SOME SEVERE STORMS ARE POSSIBLE WITH DAMAGING WINDS AND LARGE HAIL THE MAIN THREATS. AN ISOLATED TORNADO IS ALSO POSSIBLE. ALTHOUGH THE ENTIRE OUTLOOK AREA IS AT RISK FOR SEVERE WEATHER...CURRENT INDICATIONS SUGGEST AREAS ALONG AND NORTH OF INTERSTATE 80 WILL HAVE A BETTER CHANCE OF EXPERIENCING SEVERE STORMS THIS EVENING. ALTHOUGH THE STRONGER STORMS WILL PRODUCE RAINFALL AT RATES OF OVER AN INCH AN HOUR...THEY ARE EXPECTED TO MOVE ALONG FAST ENOUGH TO LIMIT THE THREAT OF FLASH FLOODING. MOST AREAS THAT GET HIT BY STORMS THIS EVENING WILL RECEIVE THREE QUARTERS OF AN INCH OR LESS OF RAINFALL. MOST OF THE STORMS ARE THEN EXPECTED TO BE MOVING OUT OF THE SOUTHERN AND SOUTHEASTERN PORTIONS OF THE OUTLOOK AREA BY 1 AM CDT MONDAY MORNING. THE STORM PREDICTION CENTER HAS PLACED A SLIGHT RISK FOR SEVERE WEATHER ACROSS THE ENTIRE OUTLOOK AREA FOR THIS AFTERNOON AND TONIGHT. VERY WARM AND HUMID CONDITIONS ARE EXPECTED BY THIS AFTERNOON. AFTERNOON HEAT INDICES WILL BE IN THE 90S AND POSSIBLY NEAR 100 DEGREES SOUTH OF INTERSTATE 80. AREA RIVERS ARE EXPERIENCING FLOODING. PLEASE SEE THE LATEST FLOOD STATEMENTS AND FLOOD WARNINGS FOR DETAILS. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY SCATTERED TO WIDESPREAD THUNDERSTORMS ARE EXPECTED MONDAY NIGHT. SOME SEVERE STORMS ARE POSSIBLE...WITH DAMAGING STRAIGHT LINE WINDS THE MAIN THREAT. LOCALLY HEAVY RAIN IS POSSIBLE...ESPECIALLY SOUTH OF INTERSTATE 80. LOCALIZED FLASH FLOODING CANNOT BE RULED OUT...IN AREAS AFFECTED BY VERY HEAVY RAINFALL RATES. EXPECT HOT AND HUMID CONDITIONS MONDAY. AFTERNOON HEAT INDICES WILL BE IN THE 90 TO 95 DEGREE RANGE MONDAY ALONG AND SOUTH OF INTERSTATE 80 ADDITIONAL THUNDERSTORMS WILL BE POSSIBLE TUESDAY MORNING...MAINLY ALONG AND EAST OF THE MISSISSIPPI RIVER. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED LATE THIS AFTERNOON AND ESPECIALLY THIS EVENING. SPOTTER ACTIVATION MAY THEN AGAIN BE NEEDED MONDAY NIGHT ACROSS PORTIONS OF THE OUTLOOK AREA. 12/RP KINNEY
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
731 PM CDT SUN JUL 6 2014
IAZ040>042-051>053-063-064-070130-
BENTON-BUCHANAN-DELAWARE-DUBUQUE-IOWA-JOHNSON-JONES-LINN-
731 PM CDT SUN JUL 6 2014
...STRONG THUNDERSTORMS HEADING INTO EAST CENTRAL IOWA...
AT 729 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 20 MILES NORTH OF
COLESBURG TO 18 MILES WEST OF GARRISON...MOVING SOUTHEAST AT 30 MPH.
* THUNDERSTORMS WILL BE NEAR...
AURORA AROUND 735 PM CDT...
LAMONT AND INDEPENDENCE AROUND 740 PM CDT...
MOUNT AUBURN...WINTHROP...BRANDON AND DUNDEE AROUND 750 PM CDT...
GARRISON...ROWLEY AND QUASQUETON AROUND 755 PM CDT...
PEA SIZE HAIL...WINDS GREATER THAN 35 MPH...FREQUENT CLOUD TO GROUND
LIGHTNING...BRIEF HEAVY RAIN...ARE EXPECTED WITH THESE STORMS.
EXPECT PONDING OF WATER ON ROADS AND IN LOW-LYING AREAS.
LAT...LON 4254 9065 4185 9183 4186 9229 4229 9229
4229 9207 4263 9208 4265 9084
TIME...MOT...LOC 0030Z 322DEG 25KT 4291 9130 4217 9249
WOLFThe Des Moines radar (KDMX), 128 km away, was scanning. The volume nearest the first event began at 01:56 UTC.
1 tornado. Local standard time, as filed.
The Keystone Fire Department observed a brief tornado touch down. No damage was reported.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Iowa in 2014Every state in 2014This day in weather historyThe tornado archive for Iowa, 2014Warnings in Iowa, July 2014
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: 520756.