On October 17, 2007 a cold front moving into eastern Iowa triggered an area of rain and scattered thunderstorms. A localized microburst struck Lowden in Cedar county with a 62 mph wind gust.
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 DVN wrote it up.
On October 17, 2007 a cold front moving into eastern Iowa triggered an area of rain and scattered thunderstorms. A localized microburst struck Lowden in Cedar county with a 62 mph wind gust. In Lowden, this storm downed a few trees, flattened some cornfields nearby and caused minor damage to the gutters of a house. South of town, there was damage to a machine shed.
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 Oct 17, 1:44 PM CST, 6 hours 31 minutes earlier.
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE QUAD CITIES IA IL 244 PM CDT WED OCT 17 2007 .SYNOPSIS... INFLUENCE OF WELL-ADVERTISED UPPER SYSTEM HAS REACHED THE CWA TODAY...WITH SHRA/TSRA OVERSPREADING THE SRN CWA. SUBJECTIVE 12Z UPPER AIR ANALYSIS INDICATES UPPER WAVE DEEPENING AND DIGGING INTO THE ROCKIES AS SECOND UPPER WAVE ALONG THE CAN/US BORDER LIFTS NWD. STRONG WARM/MOIST AIR ADVECTION WAS EVIDENT AT 850MB...WITH 12C DEWPOINTS REACHING INTO NEB/KS ON THE NOSE OF A 40-45KT LOW-LEVEL JET. DRY AIR PUNCH AT 700MB WAS PUSHING INTO THE PLAINS STATES...AIDING ELEVATED HAIL THREAT IH THE SRN/CTRL PLAINS EARLY THIS MORNING. STRONG UPPER-LEVEL JET CORE WAS DIGGING INTO THE BACK OF THE UPPER TROUGH FROM NRN CA COAST THROUGH AZ...WITH JET STREAK ALSO EVIDENT FROM OK/KS EWD THROUGH THE OH VALLEY. AT THE SURFACE...COMPLICATED PATTERN WAS MUDDIED BY CONVECTION...BUT LOW WAS CENTERED OVER SERN KS WITH A SECONDARY LOW IN WRN NEB. SFC WARM FRONT EXTENDED THROUGH NRN KS/CTRL MO/SRN IL TOWARD THE OH RIVER VALLEY. ELEVATED SHRA WITH EMBEDDED TSRA HAVE PERSISTED FROM KS THROUGH NRN MO INTO IA/IL...WELL IN LINE WITH ISENTROPIC UPLIFT ON THE 295-300K SURFACES BUT FASTER THAN MODEL TIMING HAD INDICATED. && .SHORT TERM...TONIGHT AND TOMORROW... MAIN FORECAST CONCERNS LIE IN THE SHORT TERM AS UPPER LOW DEEPENS RAPIDLY OVER NEB/IA/MN...WITH ATTENDANT POTENTIAL FOR HEAVY RAIN...SEVERE THUNDERSTORMS...AND STRONG GRADIENT WINDS. CATEGORICAL POPS ARE IN ORDER TONIGHT AS LOW-LEVEL JET FEEDS FURTHER MOISTURE INTO THE REGION. GFS/NAM BOTH INDICATE ELEVATED INSTABILITY REACHING THE SRN CWA SHORTLY AFTER MIDNIGHT...WITH GFS A LITTLE STRONGER. STORMS THAT PUSH INTO THE SRN CWA TONIGHT WILL HAVE THE POTENTIAL TO BE ELEVATED HAILERS AS WELL AS HEAVY RAIN PRODUCERS...THOUGH SKINNY CAPE PROFILE IN THE HAIL-PRODUCING LAYER AND WEAK MID-LEVEL LAPSE RATES FROM THE 12Z NAM WOULD INDICATE A MORE MARGINAL THREAT. EFFECTIVE DEEP-LAYER SHEAR IS OFF THE CHARTS FROM TONIGHT THROUGH TOMORROW AFTERNOON...PARTICULARLY IN THE SRN/ERN CWA...SO ANY STORMS THAT CAN GET GOING IN THE LOW-INSTABILITY ENVIRONMENT HAVE THE POTENTIAL TO BECOME ORGANIZED RAPIDLY. BELIEVE ELEVATED STORMS OVERNIGHT WILL MAKE A TRANSITION TO MORE SURFACE-BASED ACTIVITY RELATIVELY EARLY IN THE MORNING /AROUND 13-16Z/ AS MID-LEVEL COLD AIR ADVECTION AND AT LEAST A LITTLE DIURNAL HEATING GENERATE STRONGER MLCAPE. TRANSITION IS LIKELY TO TAKE PLACE ON ERN FRINGE OF CWA OR JUST EAST OF THERE...AND CWA REMAINS IN A MODERATE RISK IN THE SPC DAY 2 OUTLOOK. NAM TAKES MOST OF THE INSTABILITY INTO THE ERNMOST CWA BY 15-18Z...WHILE GFS IS A LITTLE SLOWER AND FURTHER NORTH...BRINGING SFC-BASED INSTABILITY INTO NRN IL AROUND THEN. SHEAR PROFILE WOULD INDICATE LINEAR CONVECTION IS THE MOST LIKELY MODE...WITH THE POTENTIAL FOR EMBEDDED SUPERCELLS IN A LARGER LINE OF CONVECTION. PRIMARY THREAT SHOULD SFC-BASED CONVECTION TAKE ROOT IN THE CWA WOULD BE FROM DAMAGING WINDS AND LARGE HAIL...BUT WHERE SFC-BASED CONVECTION DOES OCCUR...AN ISOLATED TORNADO IS ALSO POSSIBLE. HAVE HELD OFF ON ANY FLASH FLOOD HEADLINES AS GUIDANCE INDICATES EVEN WETTEST PART OF CWA CAN TAKE AT LEAST 1.5 IN. GRADIENT WINDS /SERLY AND BECOMING SWLY/ WILL ACCELERATE TONIGHT AS SFC LOW DEEPENS RAPIDLY OVER MO RIVER VALLEY...ACCOMPANIED BY STRONG GUSTS BY MID-MORNING AS MIXING AND POSSIBLY TSRA AID MOMENTUM TRANSFER OF STRONG WINDS DOWN TO THE GROUND. WILL HOLD OFF ON WIND HEADLINES AT THIS TIME...BUT CURRENT FCST FLIRTS WITH ADVISORY CRITERIA. MAYES && .LONG TERM...TOMORROW NIGHT THROUGH WEDNESDAY... MODELS ARE IN QUITE GOOD AGREEMENT THROUGH ABOUT FRIDAY...THEN DIVERGE DRASTICALLY BY LATE WEEKEND AND ARE COMPLETELY OUT OF PHASE BY THE END OF THE FORECAST PERIOD. AS A RESULT...AND BECAUSE FORECAST ATTENTION IS ON NEARER TERM...LEANED HEAVILY TOWARD HPC GUIDANCE FOR SUN-WED. DEEP...VERTICALLY STACKED CYCLONE WILL LINGER OVER THE WRN GREAT LAKES THROUGH LATE FRI AT LEAST...WITH CWA IN CYCLONIC FLOW AND LIKELY TO REMAIN CLOUDY/SHOWERY FOR MUCH OF THE DAY FRI. HAVE DROPPED MAX TEMPS QUITE A BIT ON FRI AND MIGHT NOT HAVE GONE DOWN FAR ENOUGH...AND HAVE INCREASED POPS FOR EARLY IN THE DAY WITH STRONG AGREEMENT AMONG MODELS TO KEEP A LARGE AREA OF MAINLY LIGHT PRECIP OVER THE CWA. WINDS ARE PROGGED TO REMAIN STRONG ON FRI...NEAR BUT JUST BELOW ADVISORY CRITERIA AGAIN. WILL CLEAR FROM SE TO NW LATE FRI INTO EARLY SAT...LEAVING A RATHER NICE WEEKEND. UPPER RIDGING BUILDS IN ON SAT...ALONG WITH SFC FLOW RETURNING TO SRLY AS A WEAK SFC RIDGE MOVES THROUGH. MAY SEE SOME CLOUDS START TO FILTER IN ON SUN AHEAD OF THE NEXT TROUGH DIGGING INTO THE WRN US...BUT CONTINUED SWLY FLOW AND SOME PRE-FRONTAL WARMING SHOULD PUSH TEMPS WELL ABOVE CLIMO FOR THE WEEKEND. ECMWF/GEM/GFS/GFS ENSEMBLES ARE IN AGREEMENT THAT A STRONG UPPER TROUGH WILL DIG INTO THE WRN US BY LATE WEEKEND/EARLY NEXT WEEK...WITH A COLD AIR PUSH BEHIND IT THAT WILL DROP OUR TEMPS NEAR OR BELOW CLIMO. HAVE HELD ONTO SOME SCHC/LOW CHC POPS AROUND MON/TUES...BUT HAVE VERY LOW CONFIDENCE IN TIMING OF ANY PRECIP. KEPT TEMPS CLOSER TO MEN GUIDANCE IN THE EXTENDED WITH GFS OPERATIONAL RUN SO FAR OUT OF ALIGNMENT WITH THE ENSEMBLE MEMBERS. MAYES && .AVIATION... FIRST GOOD SURGE OF WAA PRECIP WILL CONTINUE TO OVERSPREAD ALL TERMINAL SITES FROM SOUTH-TO-NORTH THIS AFTERNOON. MUCH OF THE ACTIVITY WILL INVOLVE MAINLY VFR CIGS AND VSBYS...WITH A FEW PASSING POCKETS OF MVFR CONDITIONS WITH EMBEDDED THUNDER AND ELEVATED MOISTURE FETCH TRYING TO SATURATE DOWNWARD. TIGHTENING PRESSURE GRADIENT WILL INDUCE SOUTHEAST WIND GUSTS UP TO 25 MPH THROUGH 00Z...AND EVEN INCREASE TO 30 MPH OVERNIGHT. AFTER 00Z TONIGHT... WAVES OF WIDESPREAD RAIN AND EMBEDDED THUNDER STILL LOOK ON TARGET AT ALL TERMINAL SITES...WITH OCCASIONAL LOWERING OF BOTH CIGS AND VSBYS INTO THE IFR REALM WITH THE PASSING MORE SUBSTANTIAL PRECIP POCKETS...ESPECIALLY AFTER 02Z. SOME STRONG STORMS MAY IMPACT THE BRL AND MLI TERMINAL SITES FROM 09Z-13Z OR SO...WITH HEAVY RAIN DROPPING VSBYS TO UNDER 1SM AND POSSIBLY SOME LARGE HAIL. 12 && .HYDROLOGY... MARENGO WILL CONTINUE TO BE FORECAST TO CREST NEAR MODERATE FLOOD STAGE BY FRI AFTERNOON...BUT IS DEPENDENT ON MODERATE RAINFALL AMOUNTS OCCURRING IN THE IOWA BASIN. LOCALLY HIGHER RAIN NEAR THE GAGE SITE MAY PRODUCE QUICKER AND HIGHER JUMPS. THERE IS THE POTENTIAL FOR MANY OF THE CENTRAL AND EASTERN IA RVR BASINS TO EXPERIENCING SUBSTANTIAL/WIDESPREAD RAINFALL AMOUNTS THROUGH THU MORNING. CURRENT RVR FCSTS ARE TAKING INTO ACCOUNT WIDESPREAD .8 TO 1.3 INCH RAINFALL AMOUNTS AND THE RUN-OFF THAT AMOUNT OF RAIN WILL INDUCE THROUGH THU MORNING. THIS WILL PRODUCE RISES ABOVE ACTION STAGE AT COLUMBUS JUNCTION/IOWA RVR...BRIGHTON/SKUNK RVR...AND CEDAR RAPIDS/CEDAR RVR THROUGH THE WEEKEND AND INTO EARLY NEXT WEEK. QPF OF 1.0 TO 1.5 INCHES MAY RAISE CONESVILLE/CEDAR RVR AND WAPELLO/IOWA RVR TO NEAR OR ABOVE FLOOD STAGE BY EARLY NEXT WEEK. WITH THE QPF UNCERTAINTIES...WILL STILL HOLD OF ANY FLOOD ADVISORIES OR WARNINGS FOR NOW AT THESE SITES...BUT KEEP THEM UNDER ATTENTION. HAVE ALREADY ISSUED A FLOOD ADVISORY FOR THE WAPSI NEAR DEWITT...AND SKUNK RVR NEAR SIGOURNEY TAKING INTO ACCOUNT ARRIVING WATER FROM UPSTREAM AND EVEN JUST MODERATE RAINFALL TONIGHT. HEAVIER RAIN OF 1.5 TO 2 INCHES AND RUN-OFF THIS WOULD PRODUCE MAY WARRANT A FLOOD WARNING FOR THESE SITES. HEAVY RAIN IN CENTRAL IA TONIGHT WILL ALSO PRODUCE RISES COMING DOWN STEAM THROUGH THE SOUTHEAST IA FCST SITES ON THE DSM RVR...BUT CURRENTLY THESE RISES ARE EXPECTED TO REMAIN BELOW FLOOD ADVISORY STAGE. 12 && .DVN WATCHES/WARNINGS/ADVISORIES... IA...NONE. IL...NONE. MO...NONE. && MAYES/12
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE QUAD CITIES IA IL 500 AM CDT WED OCT 17 2007 IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007- 009-015>018-024>026-034-035-MOZ009-010-181000- 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- 500 AM CDT WED OCT 17 2007 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 THE STORM PREDICTION CENTER IS FORECASTING A SLIGHT RISK OF SEVERE STORMS SOUTH OF INTERSTATE 80 THIS AFTERNOON AND TONIGHT. RAIN AND THUNDERSTORMS WILL SPREAD OVER THE ENTIRE OUTLOOK AREA FROM SOUTHWEST TO NORTHEAST DURING THE AFTERNOON AND EARLY EVENING HOURS AS A STRONG STORM SYSTEM MOVES TOWARD THE REGION. STRONG WINDS GUSTS UP TO 35 MPH WILL BE POSSIBLE TONIGHT...ALONG WITH AREAS OF HEAVY RAINFALL. THE HEAVIEST RAINS...OVER 1 INCH...ARE EXPECTED TO FALL OVER PORTIONS OF EASTERN IOWA...BUT ARE POSSIBLE IN ANY LOCATION. LATE TONIGHT...A FEW STRONG TO SEVERE STORMS MAY MOVE ACROSS SOUTHERN PORTIONS OF THE AREA...WITH THE PRIMARY THREAT BEING LARGE HAIL. .DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY THE STORM PREDICTION CENTER HAS A MODERATE RISK OF SEVERE STORMS ON THURSDAY FOR AREAS EAST OF THE MISSISSIPPI. WEST OF THE MISSISSIPPI ...THERE IS A SLIGHT RISK OF SEVERE STORMS. EMERGENCY MANAGERS AND SPOTTERS SHOULD LISTEN TO LATER FORECASTS REGARDING THIS THREAT. WINDY CONDITIONS ALONG WITH A CHANCE OF THUNDERSTORMS ARE EXPECTED DURING THE DAY ON THURSDAY. BRISK WINDS ARE STILL EXPECTED THURSDAY NIGHT INTO FRIDAY. SIGNIFICANT RISES ON AREA RIVERS ARE EXPECTED BY NEXT WEEKEND DUE TO THE RECENT HEAVY RAIN ACROSS IOWA. POTENTIAL RIVERS THAT MAY BE AFFECTED ARE THE CEDAR...IOWA...WAPSIPINICON...SKUNK...AND DES MOINES RIVERS. LOOKING FURTHER OUT...ANOTHER FALL STORM SYSTEM COULD POTENTIALLY AFFECT THE REGION SUNDAY NIGHT INTO MONDAY. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MIGHT BE NEEDED THIS EVENING OR LATE TONIGHT. SPOTTER ACTIVATION IS ANTICIPATED FOR THURSDAY AFTERNOON.
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 653 PM CDT WED OCT 17 2007 IAZ040-041-051-052-063-064-076>078-087>089-098-099-MOZ009-010- 180200- BUCHANAN-DELAWARE-BENTON-LINN-IOWA-JOHNSON-KEOKUK-WASHINGTON- LOUISA-JEFFERSON-HENRY IA-DES MOINES-VAN BUREN-LEE-SCOTLAND-CLARK- INCLUDING THE CITIES OF...INDEPENDENCE...MANCHESTER...VINTON... CEDAR RAPIDS...MARENGO...IOWA CITY...SIGOURNEY...WASHINGTON... WAPELLO...FAIRFIELD...MOUNT PLEASANT...BURLINGTON...KEOSAUQUA.... FORT MADISON...MEMPHIS...KAHOKA 653 PM CDT WED OCT 17 2007 ...THUNDERSTORMS WITH HEAVY RAIN MOVING THROUGH... AT 643 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF THUNDERSTORMS FROM NEAR BELLE PLAINE...TO SIGOURNEY...FAIRFIELD AND MEMPHIS MOVING RAPIDLY NORTH NORTHEAST AT AROUND 50 MPH. THIS LINE OF STORMS WILL MOVE ACROSS THE REST OF THE AREA OVER THE NEXT 1 TO 2 HOURS AND WILL BE ACCOMPANIED BY INTENSE RAINFALL WITH RATES OF ONE HALF TO THREE QUARTERS OF AN INCH IN 30 MINUTES. THIS HEAVY RAIN WILL GREATLY REDUCE VISIBILITY AND PRODUCE PONDING OF WATER ON ROADWAYS AND IN LOW LYING OR POORLY DRAINED AREAS. THE STORMS WILL ALSO BE ACCOMPANIED BY GUSTY WINDS OF 25 TO 35 MPH. IAZ042-053-054-065>068-ILZ015-024>026-034-035-180200- DUBUQUE-JONES-JACKSON-CEDAR-CLINTON-MUSCATINE-SCOTT-ROCK ISLAND- MERCER-HENDERSON-WARREN-HANCOCK-MCDONOUGH- INCLUDING THE CITIES OF...DUBUQUE...ANAMOSA...MAQUOKETA... TIPTON...CLINTON...MUSCATINE...BETTENDORF...DAVENPORT...MOLINE... ROCK ISLAND...ALEDO...OQUAWKA...MONMOUTH...CARTHAGE...MACOMB 653 PM CDT WED OCT 17 2007 ...LINE OF THUNDERSTORMS WITH HEAVY RAIN APPROACHING... AT 643 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF THUNDERSTORMS FROM NEAR BELLE PLAINE...TO SIGOURNEY...FAIRFIELD AND MEMPHIS MOVING RAPIDLY NORTH NORTHEAST AT AROUND 50 MPH. THIS LINE OF STORMS WILL MOVE ACROSS MUCH OF THE AREA BETWEEN 8 PM AND 10 PM... AND WILL BE ACCOMPANIED BY INTENSE RAINFALL WITH RATES OF ONE HALF TO THREE QUARTERS OF AN INCH IN 30 MINUTES. THIS HEAVY RAIN WILL GREATLY REDUCE VISIBILITY AND PRODUCE PONDING OF WATER ON ROADWAYS AND IN LOW LYING OR POORLY DRAINED AREAS. THE STORMS WILL ALSO BE ACCOMPANIED BY GUSTY WINDS OF 25 TO 35 MPH.
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
835 PM CDT WED OCT 17 2007
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0830 PM HEAVY RAIN CEDAR RAPIDS 41.97N 91.67W
10/17/2007 M1.00 INCH LINN IA TRAINED SPOTTER
SPOTTER IN SOUTHWEST CEDAR RAPIDS MEASURED 1 INCH OF RAIN
IN THE PAST 1/2 HOUR.
&&
JH2SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 847 PM CDT WED OCT 17 2007 IAZ040-041-051-052-063-064-076-077-087-088-098-MOZ009-180400- BUCHANAN-DELAWARE-BENTON-LINN-IOWA-JOHNSON-KEOKUK-WASHINGTON- JEFFERSON-HENRY IA-VAN BUREN-SCOTLAND- INCLUDING THE CITIES OF...INDEPENDENCE...MANCHESTER...VINTON... CEDAR RAPIDS...MARENGO...IOWA CITY...SIGOURNEY...WASHINGTON... FAIRFIELD...MOUNT PLEASANT...KEOSAUQUA....MEMPHIS 847 PM CDT WED OCT 17 2007 ...THUNDERSTORMS MOVING EAST BUT RAIN LINGERS... THE LINE OF THUNDERSTORMS HAS MOVED EAST OF THE AREA BUT NOT BEFORE BRINGING WIDESPREAD RAINFALL AMOUNTS OF ONE HALF TO ONE INCH. IN THE WAKE OF THE STORMS...A LARGE AREA OF RAIN...MODERATE TO LOCALLY HEAVY AT TIMES... WILL PERSIST INTO THE LATE EVENING. THE RAIN MAY BE ACCOMPANIED BY A FEW RUMBLES OF THUNDER. MANY AREAS CAN EXPECT TO RECEIVE AN ADDITIONAL QUARTER TO ONE HALF INCH OF RAIN. MOTORISTS SHOULD BE ON THE LOOKOUT FOR PONDING WATER ON ROADWAYS AND IN LOW LYING OR POORLY DRAINED AREAS. NEVER DRIVE THROUGH AREAS WHERE WATER COVERS THE ROAD. IN ADDITION SOME RISES CAN BE EXPECTED ON AREA CREEKS AND STREAMS. ADDITIONAL THUNDERSTORMS CONTAINING HEAVY RAIN ARE EXPECTED TO MOVE BACK INTO THE AREA OVERNIGHT. IAZ042-053-054-065>068-078-089-099-ILZ015-024-025-MOZ010-180400- DUBUQUE-JONES-JACKSON-CEDAR-CLINTON-MUSCATINE-SCOTT-LOUISA- DES MOINES-LEE-ROCK ISLAND-MERCER-HENDERSON-CLARK- INCLUDING THE CITIES OF...DUBUQUE...ANAMOSA...MAQUOKETA... TIPTON...CLINTON...MUSCATINE...BETTENDORF...DAVENPORT...WAPELLO... BURLINGTON...FORT MADISON...MOLINE...ROCK ISLAND...ALEDO... OQUAWKA...KAHOKA 847 PM CDT WED OCT 17 2007 ...THUNDERSTORMS WITH HEAVY RAIN MOVING THROUGH... AT 843 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF THUNDERSTORMS FROM NEAR MONTICELLO...TO MUSCATINE...TO MOUNT PLEASANT AND KAHOKA MOVING NORTH NORTHEAST AT AROUND 40 MPH. THIS LINE OF STORMS WILL MOVE ACROSS MANY AREAS ALONG AND WEST OF THE MISSISSIPPI RIVER THROUGH THE LATE EVENING...AND WILL BE ACCOMPANIED BY INTENSE RAINFALL WITH RATES OF ONE HALF TO ONE INCH IN 30 MINUTES. THIS TORRENTIAL RAIN WILL RESULT IN POOR VISIBILITY...AND PRODUCE PONDING OF WATER ON ROADWAYS AND IN LOW LYING OR POORLY DRAINED AREAS. THE STORMS MAY ALSO BE ACCOMPANIED BY GUSTY WINDS OF 20 TO 30 MPH.
SPECIAL WEATHER STATEMENT...CORRECTED NATIONAL WEATHER SERVICE QUAD CITIES IA IL 847 PM CDT WED OCT 17 2007 IAZ040-041-051-052-063-064-076-077-087-088-098-MOZ009-180400- BUCHANAN-DELAWARE-BENTON-LINN-IOWA-JOHNSON-KEOKUK-WASHINGTON- JEFFERSON-HENRY IA-VAN BUREN-SCOTLAND- INCLUDING THE CITIES OF...INDEPENDENCE...MANCHESTER...VINTON... CEDAR RAPIDS...MARENGO...IOWA CITY...SIGOURNEY...WASHINGTON... FAIRFIELD...MOUNT PLEASANT...KEOSAUQUA....MEMPHIS 847 PM CDT WED OCT 17 2007 ...THUNDERSTORMS MOVING EAST BUT RAIN LINGERS... THE LINE OF THUNDERSTORMS HAS MOVED EAST OF THE AREA BUT NOT BEFORE BRINGING WIDESPREAD RAINFALL AMOUNTS OF ONE HALF TO ONE INCH. IN THE WAKE OF THE STORMS...A LARGE AREA OF RAIN...MODERATE TO LOCALLY HEAVY AT TIMES... WILL PERSIST INTO THE LATE EVENING. THE RAIN MAY BE ACCOMPANIED BY A FEW RUMBLES OF THUNDER. MANY AREAS CAN EXPECT TO RECEIVE AN ADDITIONAL QUARTER TO ONE HALF INCH OF RAIN. MOTORISTS SHOULD BE ON THE LOOKOUT FOR PONDING WATER ON ROADWAYS AND IN LOW LYING OR POORLY DRAINED AREAS. NEVER DRIVE THROUGH AREAS WHERE WATER COVERS THE ROAD. IN ADDITION SOME RISES CAN BE EXPECTED ON AREA CREEKS AND STREAMS. ADDITIONAL THUNDERSTORMS CONTAINING HEAVY RAIN ARE EXPECTED TO MOVE BACK INTO THE AREA OVERNIGHT. IAZ042-053-054-065>068-078-089-099-ILZ015-024-025-MOZ010-180400- DUBUQUE-JONES-JACKSON-CEDAR-CLINTON-MUSCATINE-SCOTT-LOUISA- DES MOINES-LEE-ROCK ISLAND-MERCER-HENDERSON-CLARK- INCLUDING THE CITIES OF...DUBUQUE...ANAMOSA...MAQUOKETA... TIPTON...CLINTON...MUSCATINE...BETTENDORF...DAVENPORT...WAPELLO... BURLINGTON...FORT MADISON...MOLINE...ROCK ISLAND...ALEDO... OQUAWKA...KAHOKA 847 PM CDT WED OCT 17 2007 ...THUNDERSTORMS WITH HEAVY RAIN MOVING THROUGH... AT 843 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF THUNDERSTORMS FROM NEAR MONTICELLO...TO MUSCATINE...TO MOUNT PLEASANT AND KAHOKA MOVING NORTH NORTHEAST AT AROUND 40 MPH. THIS LINE OF STORMS WILL MOVE ACROSS MANY AREAS ALONG AND WEST OF THE MISSISSIPPI RIVER THROUGH THE LATE EVENING...AND WILL BE ACCOMPANIED BY INTENSE RAINFALL WITH RATES OF ONE HALF TO ONE INCH IN 30 MINUTES. THIS TORRENTIAL RAIN WILL RESULT IN POOR VISIBILITY...AND PRODUCE PONDING OF WATER ON ROADWAYS AND IN LOW LYING OR POORLY DRAINED AREAS. THE STORMS WILL ALSO BE ACCOMPANIED BY GUSTY WINDS OF 25 TO 40 MPH.
The Quad Cities radar (KDVN), 39 km away, was scanning. The volume nearest the first event began at 02:16 UTC.
1 thunderstorm wind. Local standard time, as filed.
The fire station in Lowden measured a peak gust of 62 mph during a thunderstorm, while a coop observer measured a 58 mph wind gust. Several trees were blown down in the Lowden area, and several cornfields were flattened. A machine shed was also damaged south of Lowden.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Iowa in 2007Every state in 2007This day in weather historyWarnings in Iowa, October 2007
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: 56162.