Alert archive / Illinois / Flash Flood Warnings in 2010

Flash Flood Warning 46, NWS Quad Cities, IA

July 22, 2010Jo Daviess County, Stephenson County, Illinois; Jackson County, Iowa

NWS Quad Cities, IA issued this flash flood warning at Jul 22, 2010, 10:52 PM CDT for Jo Daviess County, Stephenson County, Illinois; Jackson County, Iowa. It was in force for 13 hr. 29 reports came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jul 22, 2010, 10:52 PM CDT (03:52 UTC)
Expired: Jul 23, 2010, 11:45 AM CDT
In force: 13 hr
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Flood severity: None

Counties Jackson County, IA, Jo Daviess County, IL, Stephenson County, IL

The radar

The Quad Cities radar (KDVN), 94 km from the middle of the area, began a volume at 03:52 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What was reported inside it

Time	Report	Where	Remark
Jul 23, 12:48 AM CDT	FLASH FLOOD	Freeport, IL	ESTIMATED 10 INCHES OF WATER IN STREETS. WATER UP TO MIDDLE OF CAR TIRES. PUBLIC REPORT RELAYED BY WREX TV.
Jul 23, 1:26 AM CDT	HEAVY RAIN 4	Freeport, IL	STANDING WATER EVERYWHERE. PUBLIC REPORT RELAYED BY WREX TV.
Jul 23, 3:15 AM CDT	FLASH FLOOD	East Dubuque, IL	WATER OVER HIGHWAY 35 OUTSIDE OF EAST DUBUQUE.
Jul 23, 3:15 AM CDT	FLASH FLOOD	Galena, IL	WATER OVER HIGHWAY 20 NEAR GALENA.
Jul 23, 3:50 AM CDT	HEAVY RAIN 4.64	5 Sse Council Hill, IL	SINCE LAST EVENING.
Jul 23, 4:05 AM CDT	FLASH FLOOD	Pearl City, IL	SEVERAL HOMES IN PEARL CITY ARE FLOODED. SOME ON THE NORTH SIDE OF TOWN AS HIGH AS THE FIRST FLOOR LEVEL. FLOOD WATERS HAVE BLOWN OFF SOME MANHOLE COVERS.
Jul 23, 5:55 AM CDT	FLASH FLOOD	3 E Freeport, IL	SEVERAL ROADS IN TOWN COMPLETELY COVERED IN WATER. IN VICITINY OF TAYLOR PARK DISTRICT AND NEAR RT 75.
Jul 23, 6:00 AM CDT	HEAVY RAIN 2.42	N Davis, IL	24-HR RAINFALL TOTAL...COCORAHS REPORT
Jul 23, 6:09 AM CDT	FLASH FLOOD	Ese Elizabeth, IL	APPLE RIVER OUT OF BANK DUE TO FLASH FLOODING. OVER 6 INCHES OF RAIN OBSERVED...AS GARDEN RAIN GAUGE WAS OVERTOPPED. HEAVY RAIN OCCURING.
Jul 23, 6:36 AM CDT	HEAVY RAIN 6.46	Galena, IL	24 HOUR TOTAL.
Jul 23, 6:37 AM CDT	HEAVY RAIN 7.6	Elizabeth, IL	OBSERVER REPORTS WATER COMING UP AND OUT OF THE MAN HOLE COVERS IN THE STREET. ALSO REPORTED LONE STREET AND APPLE RIVER ROAD ARE IMPASSABLE DUE TO WATER. RAIN IS STILL FALLING.
Jul 23, 6:44 AM CDT	HEAVY RAIN 5.1	1 E Freeport, IL	SPOTTER ALSO REPORTED STREET FLOODING IN THE AREA. RAIN IS TILL FALLING.
Jul 23, 6:45 AM CDT	HEAVY RAIN 7.12	Stockton, IL	24 HOUR TOTAL. TOTAL SINCE 930 PM LAST NIGHT WAS 6.12 INCHES. AREA DITCHES FULL WITH WATER RIGHT UP TO THE ROAD IN PLACES.
Jul 23, 7:00 AM CDT	HEAVY RAIN 2.54	2 Nw Orangeville, IL	24-HR RAINFALL TOTAL...COCORAHS REPORT.
Jul 23, 7:00 AM CDT	HEAVY RAIN 3.28	4 Ese Winslow, IL	24-HR RAINFALL TOTAL.
Jul 23, 7:00 AM CDT	HEAVY RAIN 5	6 Sse Council Hill, IL	10 HOUR RAINFALL TOTAL A LITTLE OVER 5 INCHES.
Jul 23, 7:00 AM CDT	HEAVY RAIN 5.64	Freeport, IL	24 HOUR TOTAL.
Jul 23, 7:00 AM CDT	HEAVY RAIN 5.85	2 Nw Freeport, IL	24-HR RAINFALL TOTAL.
Jul 23, 7:08 AM CDT	HEAVY RAIN 5.56	W Freeport, IL	STORM TOTAL SO FAR. RELAYED BY MEDIA.
Jul 23, 7:45 AM CDT	HEAVY RAIN 5	1 Ese Nora, IL	24 HOUR TOTAL. RAINFALL TOTAL OVERNIGHT WAS 4 INCHES.
Jul 23, 7:47 AM CDT	HEAVY RAIN 6.9	Galena, IL	24 HOUR TOTAL. RELAYED BY KCRG.
Jul 23, 8:00 AM CDT	FLASH FLOOD	Pearl City, IL	8 INCHES OF FLOWING WATER ACROS ROUTE 73...ROAD CLOSED NEAR PEARL CITY.
Jul 23, 8:00 AM CDT	HEAVY RAIN 4.1	Ssw Bellevue, IA	RAINFALL TOTAL SINCE 1030PM LAST NIGHT...COCORAHS REPORT.
Jul 23, 8:00 AM CDT	HEAVY RAIN 8.03	6 E Galena, IL	24-HR RAINFALL TOTAL...COCORAHS REPORT.
Jul 23, 9:40 AM CDT	FLASH FLOOD	Elizabeth, IL	FIRE DEPARTMENT NOW CONDUCTING A WATER RESCUE. SEVERAL ROADS REMAIN CLOSED DUE TO FLOODING. EARLIER TODAY...HIGHWAY 20 WAS CLOSED WITH WATER GOING ACROSS IT.
Jul 23, 10:30 AM CDT	HEAVY RAIN 4.04	5 E Galena, IL	RAINFALL AMOUNT SINCE MIDNIGHT.
Jul 23, 10:30 AM CDT	HEAVY RAIN 5.94	5 E Galena, IL	24-HR RAINFALL TOTAL SINCE 1030AM YESTERDAY MORNING.
Jul 23, 10:49 AM CDT	FLASH FLOOD	Pearl City, IL	8 INCHES OF FLOWING WATER ACROS ROUTE 73...ROAD CLOSED NEAR PEARL CITY.
Jul 23, 11:30 AM CDT	FLOOD	Freeport, IL	HIGHWAY 26 JUST SOUTH OF FREEPORT CLOSED DUE TO WATER OVER ROAD.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched 9 storm reports to this flash flood warning; the first came 116 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 3.9 hours before the alert went out and 91 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

Mixed-layer CAPE: 2664 J/kg
Mixed-layer CIN: -13 J/kg
Mixed-layer LCL: 1076 m above ground
0-6 km bulk shear: 25 kt
0-1 km storm-relative helicity: 125 m²/s²
0-3 km storm-relative helicity: 267 m²/s²
Significant tornado parameter: 1.5
Supercell composite: 9.9

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

856 
WGUS53 KDVN 230352
FFWDVN
IAC097-ILC085-177-231245-
/O.NEW.KDVN.FF.W.0046.100723T0352Z-100723T1245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1052 PM CDT THU JUL 22 2010

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN JACKSON COUNTY IN EAST CENTRAL IOWA...
  JO DAVIESS COUNTY IN NORTHWEST ILLINOIS...
  THIS INCLUDES THE CITY OF GALENA...
  STEPHENSON COUNTY IN NORTHWEST ILLINOIS...
  THIS INCLUDES THE CITY OF FREEPORT...

* UNTIL 745 AM CDT FRIDAY

* AT 1047 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  FLASH FLOODING FROM A THUNDERSTORM OVER THE WARNED AREA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO STOCKTON...
  WINSLOW...ROCK CITY...LENA...DAVIS...DAKOTA...CEDARVILLE...
  WARREN...SCHAPVILLE...SCALES MOUND...NORA...MENOMINEE...EAST
  DUBUQUE...COUNCIL HILL...APPLE RIVER AND ST. DONATUS.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING...ESPECIALLY WHILE DRIVING.

PLEASE REPORT ANY FLOODING OR DAMAGE TO YOUR LOCAL LAW ENFORCEMENT
AGENCY FOR RELAY TO THE NATIONAL WEATHER SERVICE.

&&

LAT...LON 4250 8942 4249 8940 4244 8939 4220 8940
      4219 9074 4229 9074 4229 9067 4238 9066
      4239 9049 4248 9065 4252 9063

$$

ERVIN

3 follow-up statements

908 
WGUS73 KDVN 230724
FFSDVN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
224 AM CDT FRI JUL 23 2010

IAC097-ILC085-177-231245-
/O.CON.KDVN.FF.W.0046.000000T0000Z-100723T1245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JACKSON IA-JO DAVIESS IL-STEPHENSON IL-
224 AM CDT FRI JUL 23 2010

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 745 AM CDT FOR
STEPHENSON...JO DAVIESS AND NORTHERN JACKSON COUNTIES...

AT 211 AM CDT...DOPPLER RADAR INDICATED A NEARLY STATIONARY AXIS OF 
THUNDERSTORMS REACHING FROM FREEPORT WEST ALONG THE HIGHWAY 20 
CORRIDOR INTO EASTERN IOWA. DOPPLER RADAR INDICATED RAINFALL AMOUNTS 
OF 2 TO 4 INCHES...AND LOCAL AMOUNTS OF 3 TO 5 INCHES HAS FALLEN 
SINCE 9 PM THURSDAY FROM FREEPORT THROUGH STOCKTON AND GALENA. 
STREET FLOODING WAS REPORTED BY THE MEDIA IN THE CITY OF FREEPORT AT 
1 AM. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO 
LENA...WINSLOW...ROCK CITY...DAVIS...DAKOTA...WARREN... 
SCHAPVILLE...STOCKTON...NORA...MENOMINEE...GALENA...EAST 
DUBUQUE...COUNCIL HILL AND APPLE RIVER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

SLOW MOVING THUNDERSTORMS WITH HEAVY RAINFALL WILL CONTINUE TO 
AFFECT THE WARNED AREA THROUGH 4 AM WITH ADDITIONAL RAINFALL AMOUNTS 
1 TO 2 INCHES LIKELY. 

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING...ESPECIALLY WHILE DRIVING.

DO NOT DRIVE ON FLOODED ROADS. MOST FATALITIES OCCUR IN VEHICLES
SWEPT AWAY IN FLOOD WATERS AS SHALLOW AS 1 FOOT.

&&

LAT...LON 4250 8942 4249 8940 4244 8939 4220 8940
      4219 9074 4229 9074 4229 9067 4238 9066
      4239 9049 4248 9065 4252 9063

$$

SHEETS

574 
WGUS73 KDVN 231142
FFSDVN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
642 AM CDT FRI JUL 23 2010

IAC097-ILC085-177-231245-
/O.CON.KDVN.FF.W.0046.000000T0000Z-100723T1245Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
JACKSON IA-JO DAVIESS IL-STEPHENSON IL-
642 AM CDT FRI JUL 23 2010

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 745 AM CDT FOR
STEPHENSON...JO DAVIESS AND NORTHERN JACKSON COUNTIES...

AT 629 AM CDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED NUMEROUS 
ROAD CLOSURES DUE TO FLASH FLOODING ACROSS STEPHENSON...JO DAVIES...
AND FAR NORTHERN JACKSON COUNTIES WHERE RADAR ESTIMATES AND SPOTTER 
REPORTS INDICATED WIDESPREAD OVERNIGHT RAINFALL IN THE RANGE OF 4 TO 
6 INCHES. THE HEAVIEST RAINFALL HAS IMPACTED CENTRAL JO DAVIESS 
COUNTY...WHERE 6 TO 8 INCHES HAS BEEN REPORTED.

THUNDERSTORMS WITH HEAVY RAINFALL ARE EXPECTED TO MOVE ACROSS 
THE WARNED AREA THROUGH AT LEAST MID MORNING. THIS ADDITIONAL 
RAINFALL WILL AGGRAVATE ON-GOING FLOODING. 

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO 
WINSLOW...DAVIS...WARREN...SCALES MOUND...NORA...MENOMINEE... 
GALENA...STOCKTON...ELIZABETH...EAST DUBUQUE...COUNCIL HILL AND 
APPLE RIVER.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

DO NOT DRIVE ON FLOODED ROADS. MOST FATALITIES OCCUR IN VEHICLES
SWEPT AWAY IN FLOOD WATERS AS SHALLOW AS 1 FOOT.

&&

LAT...LON 4250 8942 4249 8940 4244 8939 4220 8940
      4219 9074 4229 9074 4229 9067 4238 9066
      4239 9049 4248 9065 4252 9063

$$

SHEETS

133 
WGUS53 KDVN 231240
FFWDVN
IAC097-ILC085-177-231645-
/O.EXT.KDVN.FF.W.0046.000000T0000Z-100723T1645Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
740 AM CDT FRI JUL 23 2010

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS EXTENDED THE

* FLASH FLOOD WARNING FOR...
  NORTHERN JACKSON COUNTY IN EAST CENTRAL IOWA...
  JO DAVIESS COUNTY IN NORTHWEST ILLINOIS...
  THIS INCLUDES THE CITY OF GALENA...
  STEPHENSON COUNTY IN NORTHWEST ILLINOIS...
  THIS INCLUDES THE CITY OF FREEPORT...

* UNTIL 1145 AM CDT

* AT 731 AM CDT...LOCAL LAW ENFORCEMENT OFFICIALS CONTINUED TO 
  REPORT FLASH FLOODING DUE TO VERY HEAVY RAINFALL AMOUNTS FROM SLOW
  MOVING THUNDERSTORMS THAT HAVE AFFECTED THE AREA SINCE LAST
  EVENING. WIDESPREAD RAINFALL AMOUNTS IN THE RANGE OF 6 TO 8 INCHES
  HAS RESULTED IN ROAD CLOSURES AND FLOODING ALONG STREAMS.   

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO WINSLOW...
  ROCK CITY...DAVIS...DAKOTA...WARREN...SCHAPVILLE...SCALES MOUND...
  NORA...MENOMINEE...EAST DUBUQUE...COUNCIL HILL AND APPLE
  RIVER...STOCKTON AND ELIZABETH. 

PRECAUTIONARY/PREPAREDNESS ACTIONS...

THUNDERSTORMS WITH HEAVY RAINFALL WILL CONTINUE TO TRACK ACROSS THE 
AREA THROUGH 9 AM. 

DO NOT DRIVE ON FLOODED ROADS. MOST FATALITIES OCCUR IN VEHICLES
SWEPT AWAY IN FLOOD WATERS AS SHALLOW AS 1 FOOT.

FLOODING OF SMALL STREAMS AND CREEKS...HIGHWAYS AND STREETS...
UNDERPASSES AND LOW LYING URBAN AND RURAL AREAS IS LIKELY.

&&

LAT...LON 4250 8942 4249 8940 4244 8939 4220 8940
      4219 9074 4229 9074 4229 9067 4238 9066
      4239 9049 4248 9065 4252 9063

$$

SHEETS

What forecasters said that day

The local office's own words before this flash flood warning went out, 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 this flash flood warning went out at Jul 22, 3:00 PM CDT, 7 hours 52 minutes earlier.

Area forecast discussion, Jul 22, 3:00 PM CDT, 7 hours 52 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
300 PM CDT THU JUL 22 2010

.DISCUSSION...
TONIGHT AND FRIDAY...WATCHING CONVERGENT LINE FROM JUST NORTH OF
OMA...TO 25 MILES SOUTH OF MASON CITY...AND TO EAST OF DECORAH FOR
THUNDERSTORM DEVELOPMENT OVER THE NEXT FEW HOURS. THIS AREA ON EDGE
OF A HIGH SBCAPE AIR MASS AND MAY BE GETTING READY TO EXPLODE WITH
STRONG TO SVR CONVECTION. MSAS INDICATED PRESSURE FALLS INCREASING
AREA AND LLVL MOISTURE CONVERGENCE SUGGEST THE OMA TO SOUTH MASON
CIT AREA PRIME FOR DEVELOPMENT. THE RESULTANT DEVELOPMENT SHOULD
THEN PROPAGATE EAST-SOUTHEAST FEEDING ON THE RICH THTA-E IN-FEED AND
IMPACT THE NORTHERN THIRD TO HALF OF THE DVN CWA FROM LATE AFTERNOON
AND WELL INTO THE EVENING. THE LATEST RUC GUIDANCE ACTUALLY LOOKS
LIKE IT MAY HAVE A HANDLE ON THE DEVELOPING SITUATION AND WILL
GENERALLY FOLLOW IT IN THE NEAR TERM FOR TONIGHT. CONVECTIVE
PARAMETERS SUGGEST THAT THE PRIMARY SVR THREAT WILL COME FROM BOWING
LINE SEGMENTS PRODUCING 60-70 MPH WINDS AGAIN IN AREAS MAINLY ALONG
AND NORTH OF I80 THROUGH 05Z FRI. 1 INCH HAIL SECONDARY AND BEST
LLVL WIND SHEAR FOR TORNADOES MAY BE JUST TO THE NORTH OF THE DVN
CWA THIS EVENING. BESIDES THE SVR THREAT...LOCALLY HEAVY RAIN BY
STORMS FEEDING ON AN 2+ INCH PW AIR MASS A GOOD BET WITH RATES AT 2+
INCHES AN HOUR POSSIBLE. WILL ISSUE A FLASH FLOOD WATCH AREAS IN AND
NEAR THE ZONE THAT RECEIVED LOCALLY HEAVY RAIN THIS MORNING/ROUGHLY
THE NORTHERN 2 TIERS OF DVN CWA COUNTIES/...WITH THE INDEPENDENCE
THROUGH THE DUBUQUE AREAS THE MOST SENSITIVE. WILL TAPER OFF TO CHC
POPS AFTER MIDNIGHT AS THE CONVECTION EITHER MOVES OUT OF THE CWA OR
WANES INTO EARLY FRI MORNING. WITH HEATING AND SFC DPT INCREASE...
HAVE EXPANDED THE HEAT ADVISORY IN BOTH AREA AND TIME. WILL EXPAND
TO ANOTHER TIRE OF COUNTIES NORTH...AND EXTEND EXPIRATION TIME
THROUGH FRI EVENING/00Z SAT. MUCH WILL DEPEND ON CONVECTIVE DEBRIS
LIMITATIONS ON FRI...BUT ENOUGH HEATING WITH MID TO UPPER 70 DPTS TO
FUEL ADVISORY CRITERIA AT LEAST ALONG AND SOUTH OF I80 THROUGH FRI
AFTERNOON. OVERNIGHT LOWS MAY STAY IN THE UPPER 70S IN AREAS THAT DO
NOT GET RAIN COOLED T-STORM OUTFLOW. WITH ANOTHER INCOMING VORT OR
MCV AND REMNANT OUTFLOW BOUNDARIES PROBABLY POLLUTING THE
LANDSCAPE...WILL BLANKET THE CWA WITH MODERATE TO HIGH CHC POPS FOR
NOW ON FRI WITH THE AFTERNOON BECOMING THE PRIME CONVECTIVE WINDOW
AGAIN IN CAPE-BUILDING HEATING.      ..12..

.LONG TERM...FRIDAY NIGHT THROUGH NEXT THURSDAY...
...ROUNDS OF SHOWERS AND THUNDERSTORMS INTO LATE SATURDAY...SOME
STORMS POSSIBLY SEVERE WITH FRONTAL PASSAGE MAIN ISSUE...

OVERVIEW...INITIALIZATION AND VERIFICATION BELOW AVERAGE DUE TO
MISSING OF OUTFLOW BOUNDARY TO REFIRE CONVECTION LATE THIS PM.
BESIDES THIS...VERIFICATION SUPPORTS A BLEND OF GFS AND HI-RES ECMWF
WITH MINOR FORCING AND THERMAL INPUTS FROM 80 KM NAM-WRF DAYS 2-3.
LINGERING QUESTION IS CHANCE OF PRECIPITATION MAINLY MONDAY WITH
WEAK WAVE.

FRIDAY NIGHT AND SATURDAY...COMPLEX SITUATION WITH MCS FRIDAY NIGHT
TO MOVE ACROSS AREA...MAINLY NORTH 1/2 TO 2/3 AREA WITH LOCALLY HEAVY
RAIN AND ISOLATED STRONG WINDS.  THEN...FRONT WILL PASS ACROSS AREA
MID TO LATE SATURDAY PM WITH STORMS RE-FIRING WITH EARLIER OUTFLOW
BOUNDARIES KEY TOWARD DETERMINING MAGNITUDE AND RISK OF SEVERE
WEATHER. THIS IS THE MAIN CONCERN FOR LATER SHIFTS.  LOCALS TOOLS AND
TECHNIQUES SUGGEST ISOLATED STRONG WINDS OF 60-70 MPH WITH LARGE HAIL
TO ONE QUARTER INCH WITH SFC TEMPS TO NEAR 90 DEGREES WITH
CONVECTIVE INITIATION. HEAVY RAINS ALSO POSSIBLE DUE TO HIGH PW/S
NEAR TO ABOVE 2 INCHES. HIGHS SATURDAY COULD VARY BY 10 DEGREES OR
MORE DUE TO CLOUDS AND TIMING OF FRONT WITH NEAR 80 FAR NW TO NEAR 90
SOUTH SECTIONS.

SATURDAY NIGHT INTO MONDAY AM...MADE MINOR CHANGES.  TEMPS TO BE A
FEW DEGREES BELOW NORMAL.  STILL SUGGESTION OF MORNING LOWS OF 57-59
DEGREES POSSIBLE ALONG AND NORTH OF HIGHWAY 30 IF SKIES ARE CLEAR AND
WINDS LIGHT. SOME WEAK SHRA AND ISOLATED TSRA MAY ARRIVE EARLY MONDAY
AM BASED ON WEAK WAVE OVER SOUTH PLAINS.

MONDAY...POOR CONFIDENCE IN WEAK WAVE TO SLIDE ALONG OLD FRONT AND
HAVE ADDED LOW POPS FOR LATER SHIFTS TO REASSESS.  THIS SHOULD BE
CONFIRMED NEXT 12-24 HOURS.  HIGHS MONDAY WOULD BE IMPACTED BY
AMOUNTS OF CLOUDS AND PRECIPITATION.  RISK IS FOR COOLER HIGHS THEN
IN THIS FORECAST.

TUESDAY AND THURSDAY...LOW CHANCE POPS...RETURN TO ABOVE NORMAL TEMPS
AND HUMID.  ANALYSIS OF LOW LEVEL THERMAL FIELDS SUGGESTS NEAR HEAT
ADVISORY CRITERIA REMAINS POSSIBLE IF NOT PROBABLE AS NEXT FRONT
APPROACHES.     ..NICHOLS..

&&

.AVIATION...
A VFR LATE AFTERNOON-EARLY EVENING WITH GUSTY SSW SFC WINDS TO
23KTS...WILL DETERIORATE AROUND THE CID AND DBQ TERMINALS BY
DEVELOPING THUNDERSTORMS FROM 22Z ON THROUGH 03Z. GUSTY SFC WINDS
BY THE STORMS MAY REACH AT LEAST 50 KTS AND BE A HIGH TURBULENT
IMPACT...AS WELL AS LOWERING CIGS AND SHARPLY REDUCED VSBYS BY HEAVY
RAIN TO UNDER A MILE POSSIBLY. THIS ACTIVITY MAY REACH THE MLI
TERMINAL BY AROUND 03Z-05Z. OTHERWISE HIGH AMBIENT MOISTURE LEVELS
MAY PRODUCE 3-5SM FOG/HAZE WELL INTO THE EVENING AT BRL AND MLI
BEFORE THE STORMS ARRIVE. THE BRL TERMINAL HAS THE BEST CHC OF
STAYING STORM-FREE OVERNIGHT.    ..12..

&&

.DVN WATCHES/WARNINGS/ADVISORIES...
IA...FLASH FLOOD WATCH THROUGH FRIDAY MORNING FOR BENTON-
     BUCHANAN-DELAWARE-DUBUQUE-JACKSON-JONES-LINN.

     HEAT ADVISORY UNTIL 7 PM CDT FRIDAY FOR CEDAR-DES MOINES-HENRY
     IA-IOWA-JEFFERSON-JOHNSON-KEOKUK-LEE-LOUISA-MUSCATINE-SCOTT-
     VAN BUREN-WASHINGTON.

IL...FLASH FLOOD WATCH THROUGH FRIDAY MORNING FOR CARROLL-JO DAVIESS-
     STEPHENSON.

     HEAT ADVISORY UNTIL 7 PM CDT FRIDAY FOR BUREAU-HANCOCK-
     HENDERSON-HENRY IL-MCDONOUGH-MERCER-PUTNAM-ROCK ISLAND-WARREN.

MO...HEAT ADVISORY UNTIL 7 PM CDT FRIDAY FOR CLARK-SCOTLAND.

&&

12/NICHOLS

Hazardous weather outlook, Jul 22, 5:00 AM CDT, 17 hours 52 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
500 AM CDT THU JUL 22 2010

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-231000-
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 THU JUL 22 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...TODAY AND TONIGHT

A HEAT ADVISORY IS IN EFFECT THIS AFTERNOON AND EVENING FOR
AREAS ALONG AND SOUTH OF A LINE FROM SIGOURNEY TO ALEDO.

THUNDERSTORMS WILL AGAIN BE SEEN ACROSS THE AREA TODAY AND TONIGHT.

THE STORM PREDICTION CENTER HAS A SLIGHT RISK OF SEVERE STORMS
ACROSS THE ENTIRE AREA. ALTHOUGH SOMEWHAT UNCERTAIN...DAMAGING
WINDS AND LARGE HAIL ARE POSSIBLE. THE MOST LIKELY TIME PERIOD
WOULD BE MID AFTERNOON THROUGH SUNRISE FRIDAY.

SOME AREA RIVERS ARE EXPERIENCING FLOODING. PLEASE SEE THE LATEST
FLOOD STATEMENTS AND FLOOD WARNINGS FOR DETAILS.

.DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY

DANGEROUS HEAT WILL CONTINUE THROUGH FRIDAY AS TEMPERATURES CLIMB
INTO THE 90S AND HEAT INDICES APPROACH 105 DEGREES. DUE TO HIGH
HUMIDITY...HEAT INDICES FRIDAY NIGHT WILL REMAIN IN THE 75 TO 80
DEGREE RANGE...OFFERING LITTLE RELIEF FROM THE OPPRESSIVE AND
DANGEROUS HEAT.

FRIDAY AND FRIDAY NIGHT...THERE IS A SLIGHT RISK OF SEVERE
THUNDERSTORMS...MAINLY NORTH OF INTERSTATE 80. ABUNDANT HEAT AND
INSTABILITY IN THE ATMOSPHERE SUGGEST THAT THE PRIMARY THREAT WILL
BE HEAVY RAIN AND DAMAGING WIND.

A COLD FRONT WILL MOVE THROUGH THE AREA SATURDAY...PROVIDING SOME
RELIEF FROM THE WARM TEMPERATURES BUT ALSO TRIGGERING ANOTHER ROUND
OF THUNDERSTORMS. THERE IS A SLIGHT RISK THAT THESE STORMS ON
SATURDAY WILL REACH SEVERE LEVELS...WITH THE PRIMARY THREAT BEING
DAMAGING WINDS AND LARGE HAIL.

LOOKING FURTHER AHEAD...THE NEXT CHANCE FOR THUNDERSTORMS WILL BE
NEXT TUESDAY NIGHT INTO WEDNESDAY.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED THIS AFTERNOON AND TONIGHT.

In the hours before

Local storm report, Jul 22, 8:59 PM CDT, 1 hour 53 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
859 PM CDT THU JUL 22 2010

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0855 PM     FLOOD            WSW EDGEWOOD            42.64N 91.40W
07/22/2010                   CLAYTON            IA   TRAINED SPOTTER

            TWO CREEKS NEAR EDGEWOOD ARE OUT OF THEIR BANKS.

&&

TG

Local storm report, Jul 22, 9:21 PM CDT, 1 hour 31 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
921 PM CDT THU JUL 22 2010

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0909 PM     TSTM WND DMG     1 W DUBUQUE             42.50N 90.71W
07/22/2010                   DUBUQUE            IA   EMERGENCY MNGR

            16 INCH DIAMETER TREES DOWN ON THE WEST SIDE OF DUBUQUE.

&&

DLF

Local storm report, Jul 22, 9:49 PM CDT, 1 hour 3 minutes before

PRELIMINARY LOCAL STORM REPORT...CORRECTED
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
949 PM CDT THU JUL 22 2010

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0855 PM     FLOOD            EDGEWOOD                42.64N 91.40W
07/22/2010                   DELAWARE           IA   TRAINED SPOTTER

            TWO CREEKS NEAR EDGEWOOD ARE OUT OF THEIR BANKS.

&&

12

Local storm report, Jul 22, 10:04 PM CDT, 48 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1004 PM CDT THU JUL 22 2010

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0928 PM     TSTM WND DMG     1 W ROCK GROVE          42.47N 89.54W
07/22/2010                   STEPHENSON         IL   EMERGENCY MNGR

            MANY 6-8 INCH TREES DOWN NEAR ROCK GROVE.

0933 PM     TSTM WND DMG     ROCK CITY               42.41N 89.47W
07/22/2010                   STEPHENSON         IL   EMERGENCY MNGR

            20 INCH LIVE TREE DOWN ON DAKOTA ROAD...TIME ESTIMATED

&&

TG

Local storm report, Jul 22, 10:43 PM CDT, 9 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1043 PM CDT THU JUL 22 2010

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1040 PM     TSTM WND GST     FREEPORT                42.29N 89.63W
07/22/2010  E50 MPH          STEPHENSON         IL   TRAINED SPOTTER

            ALONG WITH HEAVY RAIN.

&&

ERVIN

Local storm report, Jul 22, 10:52 PM CDT, 0 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1052 PM CDT THU JUL 22 2010

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1051 PM     HEAVY RAIN       3 W BALLTOWN            42.64N 90.93W
07/22/2010  M4.15 INCH       DUBUQUE            IA   CO-OP OBSERVER

            RAINFALL AMOUNT SINCE 7AM THIS MORNING.

&&

TG

The office that day

Everything else NWS Quad Cities, IA issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
Jul 22, 8:47 PM CDT	Severe Thunderstorm Warning	DVN	Jo Daviess	43 min
Jul 23, 11:09 AM CDT	River Flood Warning	DVN	Jo Daviess	11 hr
Jul 23, 11:09 AM CDT	River Flood Warning	DVN	Jo Daviess	11 hr
Jul 23, 11:09 AM CDT	River Flood Warning	DVN	Stephenson	9 days
Jul 23, 11:09 AM CDT	River Flood Warning	DVN	Henry, Rock Island, Whiteside	19 days
Jul 23, 11:47 AM CDT	Areal Flood Warning	DVN	Carroll, Jo Daviess, Stephenson	15 hr
Jul 23, 3:09 PM CDT	Special Weather Statement	DVN	Mercer, Rock Island	66 min
Jul 23, 3:27 PM CDT	Severe Thunderstorm Warning	DVN	Henry, Mercer, Rock Island	48 min
Jul 23, 4:11 PM CDT	Severe Thunderstorm Warning	DVN	Bureau, Henry, Mercer, Rock Island	52 min
Jul 23, 4:37 PM CDT	Severe Thunderstorm Warning	DVN	Bureau, Putnam	38 min
Jul 22, 8:07 PM CDT	Flash Flood Warning	DVN	Buchanan, Delaware	8 hr
Jul 22, 8:23 PM CDT	Tornado Warning	DVN	Dubuque	52 min
Jul 22, 9:42 PM CDT	Flash Flood Warning	DVN	Dubuque	8 hr
Jul 23, 3:52 AM CDT	Areal Flood Warning	DVN	Buchanan, Delaware	9 hr
Jul 23, 4:25 AM CDT	River Flood Warning	DVN	Delaware, Jones	65 hr
Jul 23, 5:46 AM CDT	Flash Flood Warning	DVN	Dubuque	6 hr
Jul 23, 10:32 AM CDT	River Flood Warning	DVN	Jackson	4 days
Jul 23, 10:32 AM CDT	River Flood Warning	DVN	Buchanan, Linn	3 days
Jul 23, 10:32 AM CDT	River Flood Warning	DVN	Jones, Linn	7 days
Jul 23, 10:32 AM CDT	River Flood Warning	DVN	Clinton, Scott	12 days
Jul 23, 12:51 PM CDT	Areal Flood Warning	DVN	Delaware	6 hr

Nearby

Flash Flood Warnings in Illinois, 2010 Flash Flood Warnings in Iowa, 2010 Every flash flood warning in 2010

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.