A potent slow moving clipper type low pressure system located in South Dakota tracked into Missouri from February 7 to 9, 2010. This storm system phased with another area of low pressure pushing across southern Illinois and Indiana.
Every event with a place to put it; 13 filed by county or forecast zone are drawn at its center, in a lighter ring. 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.
A potent slow moving clipper type low pressure system located in South Dakota tracked into Missouri from February 7 to 9, 2010. This storm system phased with another area of low pressure pushing across southern Illinois and Indiana. The result was an extended period of light snow across the region. Widespread accumulations of 5 to 9 inches were reported within a 48 hour period. The highest amount was 9.0 inches near Monmouth, Illinois in Warren County with 8.0 inches near Iowa City, Iowa in Johnson County.
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 Feb 7, 2:35 PM CST, 8 hours 25 minutes earlier.
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
235 PM CST SUN FEB 7 2010
..SYNOPSIS...
ANALYSIS DEPICTS AREAS OF FLURRIES AND SOME VERY LIGHT SNOW MOVING
INTO FORECAST AREA. NOWCAST TOOLS INDICATE MAIN FORCING TO ARRIVE
LATE TOMORROW WITH SURFACE OCCLUSION. UPPER AIR ANALYSIS SHOW SW US
SYSTEM TO PHASE WITH UPPER LOW OVER DAKOTAS WITH STILL SOME QUESTION
OF SPEED AND TIMING IN MISSOURI MONDAY NIGHT. AREA DEWPOINTS
INDICATE MOST MODELS SLIGHTLY TOO MOIST IN BL SUGGESTING MAINLY
FLURRIES AND LIGHT SNOW INTO MONDAY. NO MAJOR FORCING NOTED IN
PLAINS ALSO SUGGESTING ONLY VERY LIGHT AMOUNTS UNTIL SW US ENERGY
ARRIVES LATE MONDAY BEHIND SURFACE OCCLUSION WHICH ARRIVES IN FAR
WEST NEAR DUSK...HEAVIEST SNOW SHOULD FALL JUST WEST OF THIS FRONT
DUE TO UPGLIDE.
&&
.SHORT TERM...TONIGHT AND MONDAY...
TONIGHT...CLOUDY WITH FLURRIES AND LIGHT SNOW...MAINLY WESTERN 1/2.
TRIMMED SNOW AMOUNTS TO LESS THAN AND INCH WITH MAINLY TRACE AMOUNTS
ALONG AND ESPECIALLY EAST OF THE MISSISSIPPI RIVER. MOST LOCATIONS
WILL SEE A DUSTING TO A FEW TENTHS OF AN INCH ALONG AND JUST WEST
OF THE MISSISSIPPI RIVER TO AROUND A HALF WEST OF THE I-380
CORRIDOR. MINS TONIGHT...KEPT IN THE LOWER 20S BUT UPPER TEENS MAY
OCCUR NEAR THE FREEPORT AREA THIS EVENING.
MONDAY...LOW CLOUDS TO THICKEN WITH PATCHY LIGHT FOG...FLURRIES AND
LIGHT SNOW. AGAIN...LIMITED FORCING SUGGEST SNOW AMOUNTS LESS THAN
AN INCH MOST LOCATIONS ALONG AND EAST OF THE MISSISSIPPI RIVER. IF
FRONT IS SLOWER...MAY NEED TO LOWER POPS A BIT MORE MOST LOCATIONS.
WEST OF THE I-380 CORRIDOR...NEARER THE FRONT HAVE 1 TO 2 INCH SNOW
AMOUNTS...WHICH ALSO MAY BE TOO HIGH IF SYSTEM IS SLOWER. SINCE LIGHT
SNOW AMOUNTS...HAVE PUSHED WINTER STORM WATCH INTO MONDAY NIGHT AS
LITTLE OR NO WINTER WEATHER IMPACTS TO OCCUR MONDAY. HIGHS...STAYED
WITH CLOUDS AND LIGHT PRECIPITATION IN THE UPPER 20S TO NEAR 30
DEGREES.
AGAIN...INITIALIZATION AND ANALYSIS SUGGESTS MINOR TO MODEST SNOW
AMOUNTS DUE TO LESS MOISTER AND FORCING UNTIL MONDAY NIGHT WITH MAIN
SYSTEM AND FRONT. TRENDS SUGGEST LATER SHIFTS MAY NEED TO LOWER
AMOUNTS AND POPS A BIT MORE ..NICHOLS..
.LONG TERM...MONDAY NIGHT THROUGH NEXT SUNDAY...
FORECAST FOCUS ON STORM SYSTEM EARLY IN THE WEEK THEN ANOTHER CLIPPER
ON FRIDAY...AND CONTINUED BELOW NORMAL TEMPERATURES.
IMPRESSIVE UPPER LOW IN SOUTHERN MANITOBA SHOULD PHASE WITH THE EVEN
MORE IMPRESSIVE STORM SYSTEM APPROACHING THE SOUTHERN ROCKIES.
AS PHASING OF THE POLAR AND SUBTROPICAL JETS TAKES PLACE ACROSS THE
MIDWEST AND OHIO VALLEYS...THE SNOW WILL CONTINUE MONDAY NIGHT AND
TUESDAY. ECMWF/UKMET/GFS/NAM/GEM ALL SIMILAR IN GRADUALLY ENDING THE
SNOW FROM WEST TO EAST TUESDAY NIGHT. BY THE TIME ITS ALL SAID AND
DONE TOTAL ACCUMULATIONS FOR THE ENTIRE EVENT...INCLUDING MONDAY...
WILL BE IN THE 5 TO 9 INCH RANGE. THIS MATCHES VERY WELL WITH HPC
GUIDANCE. APPEARS TO BE ABOUT A 15 TO 1 SNOW RATIO WITH THIS EVENT
WITH QPF AMOUNTS OVER ONE-HALF INCH FOR THE ENTIRE EVENT. THIS IS
EXPECTED TO BE MAINLY LIGHT SNOW WITH SOME PERIODS OF MODERATE
INTENSITY POSSIBLE. THIS DUE TO INVERTED TROUGH AND TROWAL FEATURE
SETTING UP OVER THE CWA. EVENTUALLY DEFORMATION ZONE SHOULD DEVELOP
OVER THE AREA. HAVE ADJUSTED THE TIMING OF THE WINTER STORM WATCH TO
BEGIN MONDAY EVENING...BUT STILL END AT 12Z WED.
AS THE SURFACE LOW INTENSIFIES ON TUESDAY TO OUR EAST THE GRADIENT
SHOULD TIGHTEN. THIS SHOULD PRODUCE GUSTS OVER 30 MPH ESPECIALLY
TUESDAY AND TUESDAY NIGHT. THIS WOULD CAUSE AT LEAST AREAS OF
BLOWING AND DRIFTING WHICH MAY HAMPER TRAVEL IN OPEN AND RURAL
LOCATIONS...ESPECIALLY CONSIDERING THE SNOW SHOULD BE FLUFFIER AND
BLOW AROUND EASIER. SO WITH SNOW STILL FALLING ALONG WITH THE
STRONGER WINDS THERE IS THE POTENTIAL FOR REACHING WINTER STORM
WARNING CRITERIA...FOR AT LEAST PORTIONS OF THE DVN CWA. THUS THE
REASON TO HOLDING ON TO THE WATCH FOR NOW. LATER SHIFTS CAN MONITOR
TRENDS AND MAKE THE DECISION TO UPGRADE TO WARNING OR GO WITH AN
ADVISORY INSTEAD.
WEDNESDAY THROUGH SUNDAY...WITH THE FRESH SNOW COVER TEMPERATURES TO
REMAIN WELL BELOW NORMAL THIS ENTIRE PERIOD. THE DREADED NORTHWEST
FLOW APPEARS LOCKED IN PLACE WITH CHANCES OF MORE SNOW FRIDAY AND
AGAIN SUNDAY WITH A SERIES OF CLIPPERS. FOR NOW HAVE JUST GONE
SLIGHT CHANCES BUT LATER SHIFTS CAN MONITOR THESE MODEL TRENDS FOR
POSSIBLE INCREASE IN POPS. CONSIDERING SNOW COVER/S MUCH OF THE
NORTHERN TWO-THIRDS OF THE NATION THE COLD WEATHER IS HERE TO STAY
FOR MOST OF THIS MONTH. ..HAASE..
&&
.AVIATION...
MVFR FLYING CONDITIONS THROUGH TONIGHT WITH AREAS OF LIGHT SNOW AND
FLURRIES. ALL TERMINALS TO EXPERIENCE CIGS 1-3K AGL AND VSBYS
DROPPING TO 2 TO 5 MILES IN SNOW AND LIGHT FOG. PERIODS OF IFR
CONDITIONS TO DEVELOP MONDAY...MAINLY AT CID TERMINAL IN HEAVIEST
SNOW INTERVALS...THEN...CIGS OF 500 TO 1,000 FEET AND VSBYS NEAR 1
MILE. OTHER 3 TERMINALS CLOUD BASES TO STAY MAINLY 1-2K AGL AND
VSBYS 2 TO 4 MILES IN LIGHT FOG AND LIGHTER SNOW INTO LATE MONDAY
AFTERNOON. ..NICHOLS..
&&
.DVN WATCHES/WARNINGS/ADVISORIES...
IA...WINTER STORM WATCH FROM MONDAY EVENING THROUGH LATE TUESDAY
NIGHT FOR BENTON-BUCHANAN-CEDAR-CLINTON-DELAWARE-DES MOINES-
DUBUQUE-HENRY IA-IOWA-JACKSON-JEFFERSON-JOHNSON-JONES-
KEOKUK-LEE-LINN-LOUISA-MUSCATINE-SCOTT-VAN BUREN-WASHINGTON.
IL...WINTER STORM WATCH FROM MONDAY EVENING THROUGH LATE TUESDAY
NIGHT FOR BUREAU-CARROLL-HANCOCK-HENDERSON-HENRY IL-JO
DAVIESS-MCDONOUGH-MERCER-PUTNAM-ROCK ISLAND-STEPHENSON-
WARREN-WHITESIDE.
MO...WINTER STORM WATCH FROM MONDAY EVENING THROUGH LATE TUESDAY
NIGHT FOR CLARK-SCOTLAND.
&&
NICHOLS/HAASEHAZARDOUS WEATHER OUTLOOK...UPDATED NATIONAL WEATHER SERVICE QUAD CITIES IA IL 257 PM CST SUN FEB 7 2010 IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007- 009-015>018-024>026-034-035-MOZ009-010-081100- BUCHANAN-DELAWARE-DUBUQUE-BENTON-LINN-JONES-JACKSON-IOWA-JOHNSON- CEDAR-CLINTON-MUSCATINE-SCOTT-KEOKUK-WASHINGTON-LOUISA-JEFFERSON- HENRY IA-DES MOINES-VAN BUREN-LEE-JO DAVIESS-STEPHENSON-CARROLL- WHITESIDE-ROCK ISLAND-HENRY IL-BUREAU-PUTNAM-MERCER-HENDERSON- WARREN-HANCOCK-MCDONOUGH-SCOTLAND-CLARK- 257 PM CST SUN FEB 7 2010 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...THIS AFTERNOON AND TONIGHT LIGHT SNOW WILL FALL ACROSS MAINLY THE WESTERN PORTIONS OF THE OUTLOOK AREA THIS AFTERNOON AND TONIGHT. THE BEST CHANCE FOR MEASURABLE SNOW WILL BE WEST OF THE MISSISSIPPI RIVER...WHERE ACCUMULATIONS UP TO 1 INCH ARE POSSIBLE BY SUNRISE MONDAY. THE LIGHT SNOWFALL MAY CREATE SLICK ROADS EARLY MONDAY MORNING. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY A WINTER STORM WATCH IS IN EFFECT FROM MONDAY EVENING THROUGH EARLY WEDNESDAY MORNING. A WINTER STORM SYSTEM WILL CONTINUE TO AFFECT THE AREA MONDAY AND TUESDAY AS IT DROPS SOUTHEAST ACROSS THE MIDWEST. IT WILL BRING A PROLONGED DURATION SNOWFALL TO THE AREA. SNOW IS EXPECTED TO CONTINUE THROUGH TUESDAY NIGHT. LIGHT TO MODERATE SNOW DURING THIS TIME IS EXPECTED TO RESULT IN SNOWFALL TOTALS BETWEEN 5 AND 9 INCHES IN MOST LOCATIONS. STRONG NORTH TO NORTHWEST WINDS BETWEEN 25 AND 30 MPH WILL DEVELOP TUESDAY MORNING AND CONTINUE THROUGH TUESDAY NIGHT. THIS MAY CAUSE CONSIDERABLE BLOWING AND DRIFTING SNOW. WIND CHILL VALUES WILL DROP TO AROUND ZERO TUESDAY NIGHT AND EARLY WEDNESDAY...AS COLD AIR POURS INTO THE AREA BEHIND THE SYSTEM. THIS STORM WILL LIKELY CAUSE TRAVEL DIFFICULTIES. INTERESTED INDIVIDUALS SHOULD KEEP UPDATED ON THE LATEST INFORMATION ON THIS POTENTIAL WINTER STORM. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED THIS AFTERNOON OR TONIGHT. JH/TP
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
855 PM CST SUN FEB 07 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0700 PM SNOW 2 W CEDAR RAPIDS 41.97N 91.71W
02/07/2010 E1.0 INCH LINN IA TRAINED SPOTTER
0759 PM SNOW 1 WSW IOWA CITY 41.65N 91.55W
02/07/2010 M0.8 INCH JOHNSON IA TRAINED SPOTTER
0805 PM SNOW 1 SE VINTON 42.16N 92.02W
02/07/2010 E0.5 INCH BENTON IA TRAINED SPOTTER
SNOWFALL SO FAR.
0822 PM SNOW 1 SSE CEDAR RAPIDS 41.95N 91.66W
02/07/2010 M1.0 INCH LINN IA TRAINED SPOTTER
LIGHT SNOW STILL FALLING
&&PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
901 PM CST SUN FEB 07 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0900 PM SNOW 1 SSW BELLE PLAINE 41.89N 92.28W
02/07/2010 E1.0 INCH BENTON IA TRAINED SPOTTER
STILL LIGHTLY SNOWING.
&&PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
908 PM CST SUN FEB 07 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0907 PM SNOW 2 N NEW WINDSOR 41.23N 90.45W
02/07/2010 M0.3 INCH MERCER IL TRAINED SPOTTER
&&
DLFPRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
922 PM CST SUN FEB 07 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0920 PM SNOW WINTHROP 42.47N 91.73W
02/07/2010 E1.0 INCH BUCHANAN IA PUBLIC
&&PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
932 PM CST SUN FEB 07 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0930 PM SNOW 3 NW MOUNT VERNON 41.95N 91.46W
02/07/2010 E0.8 INCH LINN IA TRAINED SPOTTER
SNOWFALL SO FAR.
&&PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1020 PM CST SUN FEB 07 2010
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1000 PM SNOW STANLEY 42.64N 91.81W
02/07/2010 M1.0 INCH BUCHANAN IA TRAINED SPOTTER
TOTAL SO FAR
&&
DLFThe national radar mosaic for the moment the first event began.
13 winter weather. Local standard time, as filed.
A trained spotter measured 6.7 inches of snow 5 miles southeast of Council Hill.
A trained spotter measured 6.8 inches of snow near Cambridge.
A trained spotter measured 6.5 inches of snow in Freeport.
A CoCoRaHS observer reported 6.3 inches of snow near Coleta.
A trained spotter measured 6.0 inches of snow near Macomb.
A trained spotter measured 9.0 inches of snow near Monmouth.
A trained spotter measured 5.0 inches of snow near Princeton.
After NWS Directive 10-1605, the rules offices file Storm Data by.
Every storm in Illinois in 2010Every state in 2010This day in weather historyWarnings in Illinois, February 2010
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: 216965, 216967, 216961, 216963, 216969, 216964, 216970, 216972, 216962, 216966, 216971, 216960, 216968.