Alert archive / Illinois / Flash Flood Warnings in 2011
Flash Flood Warning 6, NWS Chicago, IL
NWS Chicago, IL issued this flash flood warning at May 22, 2011, 9:06 PM CDT for 5 counties in Illinois. It was in force for 5 hr. 2 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
- May 22, 2011, 9:06 PM CDT (02:06 UTC)
- Expired
- May 23, 2011, 1:47 AM CDT
- In force
- 5 hr
- Issued by
- NWS Chicago, IL
- Area
- Storm-based polygon
- Flood severity
- None
Counties Boone County, IL, DeKalb County, IL, Lee County, IL, Ogle County, IL, Winnebago County, IL
The radar
The Milwaukee radar (KMKX), 115 km from the middle of the area, began a volume at 02:10 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 |
|---|---|---|---|
| May 22, 9:35 PM CDT | HEAVY RAIN 2 | 5 Nw Polo, IL | SINCE 715 PM. |
| May 22, 11:37 PM CDT | HEAVY RAIN 2.42 | 3 Nnw Dixon, IL | TOTAL RAINFALL IN 6 HOURS. OF THAT TOTAL, 1.5 INCHES FELL FROM 9 TO 10 PM. COCORAHS OBSERVER. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this flash flood warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
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, 2.1 hours before the alert went out and 112 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.
- Mixed-layer CAPE
- 1935 J/kg
- Mixed-layer CIN
- -18 J/kg
- Mixed-layer LCL
- 935 m above ground
- 0-6 km bulk shear
- 46 kt
- 0-1 km storm-relative helicity
- 271 m²/s²
- 0-3 km storm-relative helicity
- 364 m²/s²
- Significant tornado parameter
- 3.4
- Supercell composite
- 19.9
The text
As transmitted, in the capitals the NWS used until 2016.
578
WGUS53 KLOT 230206
FFWLOT
ILC007-037-103-141-201-230800-
/O.NEW.KLOT.FF.W.0006.110523T0206Z-110523T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
906 PM CDT SUN MAY 22 2011
THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A
* FLASH FLOOD WARNING FOR...
LEE COUNTY IN NORTH CENTRAL ILLINOIS...
NORTHWESTERN DE KALB COUNTY IN NORTH CENTRAL ILLINOIS...
OGLE COUNTY IN NORTH CENTRAL ILLINOIS...
WESTERN BOONE COUNTY IN NORTH CENTRAL ILLINOIS...
WINNEBAGO COUNTY IN NORTH CENTRAL ILLINOIS...
* UNTIL 300 AM CDT
* AT 902 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SLOW MOVING THUNDERSTORMS WITH VERY HEAVY RAINFALL CONTINUING TO
MOVE ACROSS THE WARNED AREA. RADAR RAINFALL ESTIMATES OF UP TO
THREE INCHES EXTEND FROM AREAS NEAR POLO NORTHEAST TO FORRESTON
AND PECATONICA.
* RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
BELVIDERE...DIXON...LOVES PARK...MACHESNEY PARK...MOUNT MORRIS...
OREGON...ROCHELLE...ROCKFORD...ROCKFORD AIRPORT...ROCKTON...SOUTH
BELOIT...WALTON...AMBOY...ASHTON...BYRON...CHERRY VALLEY...
DURAND...FORRESTON...FRANKLIN GROVE...HILLCREST...LAKE SUMMERSET...
PECATONICA...POLO...ROSCOE...STILLMAN VALLEY AND WINNEBAGO.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. DO
NOT ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND TO
ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN
WATER BEGINS RISING.
&&
LAT...LON 4249 8880 4213 8886 4158 8923 4158 8963
4192 8963 4193 8969 4220 8970 4221 8940
4250 8940
$$
RODRIGUEZ3 follow-up statements
667
WGUS73 KLOT 230316
FFSLOT
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1016 PM CDT SUN MAY 22 2011
ILC007-037-103-141-201-230800-
/O.CON.KLOT.FF.W.0006.000000T0000Z-110523T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
OGLE IL-WINNEBAGO IL-BOONE IL-DE KALB IL-LEE IL-
1016 PM CDT SUN MAY 22 2011
...FLASH FLOOD WARNING REMAINS IN EFFECT FOR LEE...NORTHWESTERN DE
KALB...WESTERN BOONE...WINNEBAGO AND OGLE COUNTIES UNTIL 300 AM
CDT...
AT 1009 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
THUNDERSTORMS WITH VERY HEAVY RAINFALL ACROSS THE WARNED AREA. RADAR
RAINFALL ESTIMATES PRECIPITATION IN EXCESS OF 4 INCHES FELL ACROSS
PORTIONS OF WESTERN AND SOUTHWESTERN OGLE COUNTY AND FAR
NORTHWESTERN LEE COUNTY. SHOWERS AND THUNDERSTORMS CONTINUE TO
DEVELOP WEST AND SOUTHWEST OF THE WARNED AREA AND COULD DROP AN
ADDITIONAL HALF INCH TO AN INCH OF PRECIPITATION.
RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
BELVIDERE...DIXON...LOVES PARK...MACHESNEY PARK...MOUNT MORRIS...
OREGON...ROCHELLE...ROCKFORD...ROCKFORD AIRPORT...ROCKTON...SOUTH
BELOIT...WALTON...AMBOY...ASHTON...BYRON...CHERRY VALLEY...DURAND...
FORRESTON...FRANKLIN GROVE...HILLCREST...LAKE SUMMERSET...
PECATONICA...POLO...ROSCOE...STILLMAN VALLEY AND WINNEBAGO.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT
ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT
STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
&&
LAT...LON 4249 8880 4213 8886 4158 8923 4158 8963
4192 8963 4193 8969 4220 8970 4221 8940
4250 8940
$$
BMD262
WGUS73 KLOT 230434
FFSLOT
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1134 PM CDT SUN MAY 22 2011
ILC007-037-103-141-201-230800-
/O.CON.KLOT.FF.W.0006.000000T0000Z-110523T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
OGLE IL-WINNEBAGO IL-BOONE IL-DE KALB IL-LEE IL-
1134 PM CDT SUN MAY 22 2011
...FLASH FLOOD WARNING REMAINS IN EFFECT FOR LEE...NORTHWESTERN DE
KALB...WESTERN BOONE...WINNEBAGO AND OGLE COUNTIES UNTIL 300 AM
CDT...
AT 1131 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
SHOWERS AND THUNDERSTORMS ACROSS THE WARNED AREA. RADAR RAINFALL
ESTIMATES THAT PRECIPITATION IN EXCESS OF 4 INCHES FELL ACROSS
PORTIONS OF WESTERN AND SOUTHWESTERN OGLE COUNTY AND FAR
NORTHWESTERN LEE COUNTY. SHOWERS AND THUNDERSTORMS ARE
WEAKENING...BUT LOCALIZED AMOUNTS OF UP TO AN ADDITIONAL QUARTER
INCH IS POSSIBLE.
RUNOFF FROM THIS EXCESSIVE RAINFALL WILL CAUSE FLASH FLOODING TO
OCCUR. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE...
BELVIDERE...DIXON...LOVES PARK...MACHESNEY PARK...MOUNT MORRIS...
OREGON...ROCHELLE...ROCKFORD...ROCKFORD AIRPORT...ROCKTON...SOUTH
BELOIT...WALTON...AMBOY...ASHTON...BYRON...CHERRY VALLEY...DURAND...
FORRESTON...FRANKLIN GROVE...HILLCREST...LAKE SUMMERSET...
PECATONICA...POLO...ROSCOE...STILLMAN VALLEY AND WINNEBAGO.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. IF FLOODING IS OBSERVED...ACT QUICKLY. DO NOT
ENTER THE WATER. TURN AROUND AND MOVE UP TO HIGHER GROUND. DO NOT
STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.
&&
LAT...LON 4249 8880 4213 8886 4158 8923 4158 8963
4192 8963 4193 8969 4220 8970 4221 8940
4250 8940
$$
BMD112
WGUS73 KLOT 230647
FFSLOT
FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
147 AM CDT MON MAY 23 2011
ILC007-037-103-141-201-230701-
/O.CAN.KLOT.FF.W.0006.000000T0000Z-110523T0800Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
OGLE IL-WINNEBAGO IL-BOONE IL-DE KALB IL-LEE IL-
147 AM CDT MON MAY 23 2011
...THE FLASH FLOOD WARNING THAT WAS IN EFFECT FOR LEE...NORTHWESTERN
DE KALB...WESTERN BOONE...WINNEBAGO AND OGLE COUNTIES IS CANCELLED...
EXCESS RUNOFF FROM HEAVY RAIN HAS ENDED OVER THE WARNED AREA. STREAMS
AND CREEKS IN THE WARNED AREA HAVE RECEDED OR WERE BEGINNING TO
RECEDE...ENDING THE FLOOD THREAT.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
IF FLOODING WAS OBSERVED PLEASE RELAY YOUR REPORT TO LOCAL LAW
ENFORCEMENT OR TO THE NATIONAL WEATHER SERVICE IN CHICAGO.
&&
LAT...LON 4249 8880 4213 8886 4158 8923 4158 8963
4192 8963 4193 8969 4220 8970 4221 8940
4250 8940
$$
BEACHLERWhat 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 Chicago, IL wrote its last area forecast discussion before this flash flood warning went out at May 22, 7:30 PM CDT, 1 hour 36 minutes earlier.
Area forecast discussion, May 22, 7:30 PM CDT, 1 hour 36 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 730 PM CDT SUN MAY 22 2011 .MESOSCALE DISCUSSION... 205 PM CDT AS THE ATMOSPHERE CONTINUES TO QUICKLY DESTABILIZE EARLY THIS AFTERNOON...THUNDERSTORMS CAN BE SEEN DEVELOPING ALONG A REMNANT BOUNDARY/GRAVITY WAVE PROPAGATING EAST ACROSS PORTIONS OF CENTRAL ILLINOIS. WITH CU RAPIDLY DEVELOPING AND LATEST GUIDANCE INDICATING THAT THE ATMOSPHERE HAS BECOME MODERATELY TO STRONGLY UNSTABLE ACROSS CENTRAL ILLINOIS...ITS QUITE POSSIBLE THAT THERE COULD BE UPSCALE THUNDERSTORM GROWTH INTO THE SOUTHERN PORTIONS OF THE CWA...WHICH WOULD INCLUDE AREAS SOUTH OF INTERSTATE 80. THIS IS OUT AHEAD OF MAIN THUNDERSTORM DEVELOPMENT STILL ONGOING ACROSS FAR WESTERN ILLINOIS AND EASTERN IOWA. STILL MONITORING THE OVERALL SEVERE THREAT EARLY THIS AFTERNOON ACROSS THIS AREA...AS THEIR IS ALMOST A RACE BETWEEN THIS GRAVITY WAVE PUSHING EAST AND DESTABILIZATION OF THE ATMOSPHERE. EITHER WAY...THUNDERSTORMS TO PUSH EAST EARLY THIS AFTERNOON ALONG AND SOUTH OF INTERSTATE 80 WITH DAMAGING WINDS AND HAIL THE MAIN THREATS...WITH THE TORNADO THREAT ISOLATED AT THIS TIME AS FLOW REMAINS WEAKER AND MORE UNIDIRECTIONAL...WITH HIGH DEWPOINT DEPRESSIONS IN PLACE. STILL ANTICIPATE THUNDERSTORM DEVELOPMENT OFF TO THE WEST TO CONTINUE TODAY WITH BETTER CHANCES FOR WIDESPREAD COVERAGE INTO LATE AFTERNOON AND EVENING. TORNADO THREAT COULD STILL POSSIBLY INCREASE THIS AFTERNOON INTO THE EVENING AS LOW LEVEL MOISTURE INCREASES AND LLJ RAMPS UP. RODRIGUEZ && .DISCUSSION... 326 PM CDT CURRENT SATELLITE TRENDS/SFC OBSERVATIONS SHOW HIGHER DEW POINT AIR CONTINUING TO ADVECT RAPIDLY NWD ACROSS AREA. SURFACE DEW POINTS IN MID-UPPER 60S WILL OVERSPREAD THE REMAINDER OF NRN IL...AS REGION OF STEEPER MID LEVEL LAPSE RATES SHIFT EWD ACROSS REGION WITH THE PROGRESSION OF THE UPPER LOW CENTER OVER SRN MN. THIS WILL ALLOW THE AIR MASS OVER THE ENTIRE FORECAST AREA TO BECOME VERY UNSTABLE HEADING INTO THIS EVENING. THEREFORE...WILL MAKE LITTLE CHANGE TO FORECAST POPS...KEEPING LIKELY PROBABILITIES OF THUNDER THROUGH AT LEAST 06Z OVER WRN CWA...AND OVERNIGHT ACROSS NWRN INDIANA. SATELLITE IMAGERY ALSO SHOWS TWO AREAS OF VIGOROUS THUNDERSTORM DEVELOPMENT. THE LEADING AREA HAS BLOSSOMED ALONG A GRAVITY WAVE FROM JUST WEST OF STL TO NEAR PONTIAC. ANVIL GROWTH AND CLOUD TOP TEXTURE SUGGEST THE STORM OVER LIVINGSTON COUNTY IS VERY INTENSE. THE NORTHEAST TERMINUS OF THIS LINE HAS SHOWN SOME INCREASED CUMULUS GROWTH...BUT AT THE MOMENT RELATIVELY LOW DEW POINTS ARE LIMITING DEVELOPMENT OVER CHICAGO. THIS AREA OF STORMS IS EXPECTED TO CONTINUE TO INCREASE IN COVERAGE ACROSS NERN/EAST CENTRAL IL INTO NWRN INDIANA. ANOTHER AREA OF STORMS IS FORMING A LINE FROM SERN KS...THROUGH ERN IA AND INTO WRN WI/EAST CENTRAL MN. THIS LINE IS EXPECTED TO FORM INTO A SQUALL LINE THIS EVENING...THEN ADVANCE ACROSS THE AREA DURING THE COURSE OF THE EVENING. WILL BEGIN TO LOWER POPS BACK INTO CHC CATEGORY FROM WEST TO EAST AFTER 06Z. ON MONDAY...CHANCES OF ADDITIONAL SHOWER/THUNDERSTORM DEVELOPMENT ARE LOOKING MORE PROBABLE. DIURNAL HEATING IS FORECAST TO ALLOW SFC TEMPS TO INCREASE TO AROUND 80...AS REMNANT UPPER LEVEL COLD POOL ASSD WITH WEAKENING UPPER CIRCULATION OVER THE NRN GREAT LAKES ALLOWS FOR RATHER STEEP LAPSE RATES TO DEVELOP BY AFTERNOON. FOR NOW WILL GO WITH INHERITED CHC POPS...BUT SUSPECT THAT COVERAGE...ESPECIALLY OVER FAR NRN IL...WILL BECOME GREAT ENOUGH TO BUMP UP TO AT LEAST LIKELY CAT BY 18Z. THIS ACTIVITY WILL DIMINISH WITH APPROACH OF SUNSET...AND AS AREA COMES UNDER SUBSIDENT REGION IN THE WAKE OF DEPARTING SHORT WAVE. MONDAY NIGHT...A COLD FRONT WILL BE DROPPING SWD ACROSS THE WESTERN GREAT LAKES REGION. AS WINDS TURN NE LATE MONDAY NIGHT...AND INCREASE IN SPEED ON TUESDAY...CHILLY AIR OFF THE LAKES WILL ACCOUNT FOR ABOUT A 25 DEGREE 24-HOUR DROP IN TEMPS IN SOME AREAS...THUS WILL MAINTAIN "MUCH COOLER" TERMINOLOGY IN FORECAST. TUESDAY IS EXPECTED TO BE CLOUDY AND COOL...BUT DRY AS AREA COMES UNDER RIDGING BOTH SFC AND ALOFT. BY LATE TUESDAY NIGHT...POPS TO BEGIN TO INCREASE AGAIN FROM S-N AS ZONE OF INCREASING THETA-E CONVERGENCE DEVELOPS IN RESPONSE TO STRENGTHENING LOW LEVEL JET AHEAD OF THE NEXT SOUTHERN PLAINS LOW. THIS NEXT SYSTEM IS THEN TO PASS JUST SOUTH OF THE FORECAST AREA WED-WED NIGHT. GUIDANCE FAIRLY CONSISTENT IN DEVELOPING A STRONG FRONTOGENETIC ZONE FROM ERN KS...NEWD TO SRN LOWER MI. IN ADDITION TO A HIGH PRECIPITATION THREAT...TEMPERATURES WILL LIKELY VARY BY AT LEAST 20 DEG ACROSS THE REGION ON WEDNESDAY. PRECIPITATION THREAT WILL SLOWLY DIMINISH THURSDAY INTO THURSDAY EVENING AS THIS SYSTEM HEADS EAST. EXTENDED PERIOD...AFTER A COOL PERIOD FRIDAY...INCREASING SLY-SWLY FLOW NEXT WEEKEND...AS SFC HIGH HEADS TO EAST OF REGION...AND WITH UPPER LEVEL HEIGHTS FORECAST TO UNDERGO SIGNIFICANT RISES...MEMORIAL DAY WEEKEND MAY ACTUALLY TURN RATHER SUMMERLIKE. MERZLOCK && .AVIATION... //ORD AND MDW CONCERNS...UPDATED 00Z... * TIMING AND INTENSITY OF THUNDERSTORMS AND THEIR IMPACT ON THE TERMINALS THIS EVENING * POTENTIAL FOR DAMAGING WIND GUSTS AND HAIL * TORNADO WATCH REMAINS IN EFFECT UNTIL 10 PM CDT ED F //DISCUSSION...UPDATED 00Z... AIR MASS REMAINS UNSTABLE BETWEEN LINES OF THUNDERSTORMS OVER THE LOCAL AREA THIS EVENING ESPECIALLY NORTH AND WEST OF THE TERMINALS. LOW LEVEL JET STREAK CONTINUES TO PUMP WARM MOIST AIR IN THE LOW LEVELS OF THE ATMOSPHERE NORTHWARD. INSTABILITY COMBINED WITH SHEAR DUE TO VEERING AND INCREASING WINDS WITH HEIGHT FUELING EXPLOSIVE THUNDERSTORMS WITH DAMAGING WIND GUSTS IN EXCESS OF 60 KTS AND HAIL UP TO GOLF BALL SIZED. AIR MASS OVER TERMINALS AND POINTS EAST AND SOUTH LESS UNSTABLE DUE TO EARLIER CONVECTION. CELLS TO THE WEST STILL ON TRACK TO COALESCE INTO SOMEWHAT OF A SQUALL LINE BEFORE MOVING EAST ACROSS ORD/MDW TERMINALS THIS EVENING. TIMING OF SUCH LOOKING TO BE BETWEEN 0130Z AND 03Z WITH LINGERING SHOWERS HANGING AROUND A COUPLE OF HOURS AFTER THAT. ED F //ORD AND MDW CONFIDENCE...UPDATED 00Z... * MEDIUM CONFIDENCE IN THE TIMING OF A SQUALL LINE TO PLOW ACROSS THE AREA THIS EVENING... IMPACTING ORD AND MDW BETWEEN 02Z TO 0330Z. * LOW CONFIDENCE THAT DAMAGING WINDS OR LARGE HAIL MAY IMPACT TERMINALS - PLEASE MONITOR FOR LATER WARNINGS ED F //OUTLOOK FOR ORD/MDW FOR 12Z TUESDAY-12Z SUNDAY...UPDATED 00Z... TUESDAY...VFR. WEDNESDAY...VFR OCNL MVFR SHOWERS. THURSDAY...VFR. FRIDAY...VFR. SATURDAY...VFR SCT SHOWERS. ED F && .MARINE... 437 PM CDT INTENSE LOW PRESSURE OVER MINNESOTA WILL MOVE NORTHEAST TO LAKE SUPERIOR TONIGHT MAINTAINING A BRISK SOUTHERLY FLOW ACROSS LAKE MICHIGAN. WARM MOIST AIR MASS MOVING OVER CHILLY WATERS RESULTING IN VERY STABLE PROFILE NEAR THE LAKE SURFACE INHIBITING HIGHER WINDS FROM MIXING DOWN. THIS SCENARIO ALSO RESULTING IN AREAS OF DENSE FOG ACROSS THE LAKE. LEADING COLD FRONT WILL SWEEP SOUTHEAST ACROSS THE LAKE LATE TONIGHT AND EARLY MONDAY WITH A SECONDARY COLD FRONT DROPPING SOUTH ACROSS THE LAKE MONDAY NIGHT. A STRONG AREA OF HIGH PRESSURE WILL BUILD SOUTHWARD INTO ONTARIO BY MID WEEK AS AN AREA OF LOW PRESSURE ORGANIZES OVER THE CENTRAL PLAINS. THE LOW WILL MOVE EAST INTO THE LOWER OHIO VALLEY BY THURSDAY RESULTING IN A BRISK NE FLOW ACROSS LAKE MICHIGAN. ED F && .LOT WATCHES/WARNINGS/ADVISORIES... IL...NONE. IN...NONE. LM...NONE. &&
Hazardous weather outlook, May 22, 4:26 PM CDT, 4 hours 40 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 426 PM CDT SUN MAY 22 2011 ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019- 232130- WINNEBAGO-BOONE-MCHENRY-LAKE ILLINOIS-OGLE-LEE-DE KALB-KANE- DUPAGE-COOK-LA SALLE-KENDALL-GRUNDY-WILL-KANKAKEE-LIVINGSTON- IROQUOIS-FORD-LAKE INDIANA-PORTER-NEWTON-JASPER-BENTON- 426 PM CDT SUN MAY 22 2011 /526 PM EDT SUN MAY 22 2011/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS... NORTHEAST ILLINOIS AND NORTHWEST INDIANA. .DAY ONE...TONIGHT. * WEATHER HAZARDS EXPECTED: THUNDERSTORMS...SOME OF WHICH MAY PRODUCE: VERY LARGE HAIL. DAMAGING WINDS. A FEW TORNADOES. * AREAS AFFECTED AND TIMING: A LINE OF SEVERE THUNDERSTORMS FROM SOUTHERN LAKE MICHIGAN...SOUTHWEST ALONG INTERSTATE 57 THROUGH FORD COUNTY...WILL CONTINUE NORTHEAST ACROSS EAST CENTRAL ILLINOIS AND NORTHWEST INDIANA THROUGH 6 PM CDT THIS EVENING. A SECOND LINE OF STORMS...NOW APPROACHING THE MISSISSIPPI RIVER...WILL BE REACHING AREAS WEST OF INTERSTATE 39 AFTER 7 PM CDT...AND WILL REACH THE CHICAGO AREA AFTER 9 PM CDT. * DISCUSSION: LOW PRESSURE CENTERED OVER CENTRAL MINNESOTA WILL CONTINUE TO LIFT NORTHEAST ACROSS NORTHWEST WISCONSIN TONIGHT. AS IT DOES SO...A POOL OF VERY UNSTABLE AIR AHEAD OF THIS SYSTEM WILL CONTINUE TO STREAM NORTHWARD ACROSS THE OUTLOOK AREA. MEANWHILE...A 70 KT MID LEVEL JET MAX WILL PUNCH ACROSS THE UPPER MISSISSIPPI VALLEY. WIND PROFILES SUGGEST THAT SOME DISCRETE STORMS THAT FORM THROUGH EARLY THIS EVENING WILL LIKELY BECOME SUPERCELLULAR...WITH A POTENTIAL FOR A FEW TORNADOES AND VERY LARGE HAIL. THIS IS MOST LIKELY FROM EASTERN IOWA AND FAR NORTHEAST MISSOURI...NORTHEASTWARD ACROSS ADJACENT AREAS OF WISCONSIN...AND WESTERN THROUGH NORTH CENTRAL ILLINOIS. DURING THE EVENING HOURS...THESE STORMS ARE EXPECTED TO EVOLVE INTO A SQUALL LINE AT THE NOSE OF THE MID LEVEL JET MAX. THIS WILL SUPPORT BOWING STRUCTURES WITHIN THIS LINE...WITH THE PRIMARY SEVERE THREAT SHIFTING MORE TO A DAMAGING STRAIGHT LINE WIND EVENT ACROSS NORTHEAST ILLINOIS AND NORTHWEST INDIANA THROUGH THE EVENING HOURS. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY. THERE WILL BE PERIODIC CHANCES OF THUNDERSTORMS MONDAY INTO MONDAY NIGHT. THUNDERSTORMS ARE LIKELY ACROSS THE AREA WEDNESDAY INTO WEDNESDAY NIGHT. A CHANCE OF THUNDERSTORMS WILL REMAIN FROM EAST CENTRAL ILLINOIS ACROSS NORTHWEST INDIANA ON THURSDAY. PORTIONS OF THE KANKAKEE RIVER IN NORTHWEST INDIANA WILL REMAIN IN FLOOD MONDAY. .SPOTTER INFORMATION STATEMENT... SPOTTERS WILL BE NEEDED THROUGH THIS EVENING. && COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO WEBPAGE: WEATHER.GOV/CHICAGO LMZ740>745-232130- WINTHROP HARBOR TO WILMETTE HARBOR- WILMETTE HARBOR TO NORTHERLY ISLAND- NORTHERLY ISLAND TO CALUMET HARBOR-CALUMET HARBOR TO GARY- GARY TO BURNS HARBOR-BURNS HARBOR TO MICHIGAN CITY- 426 PM CDT SUN MAY 22 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE ILLINOIS NEARSHORE WATERS OF LAKE MICHIGAN AND THE INDIANA NEARSHORE WATERS OF LAKE MICHIGAN. .DAY ONE...TONIGHT. THUNDERSTORMS WILL CONTINUE TO DEVELOP ACROSS NORTHERN ILLINOIS AND NORTHWEST INDIANA THIS EVENING. SOME STORMS MAY BECOME SEVERE AND PRODUCE LARGE HAIL...INTENSE LIGHTNING...AND WIND GUSTS IN EXCESS OF 50 KT. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY. THERE IS A CHANCE OF THUNDERSTORMS MONDAY INTO MONDAY NIGHT. THUNDERSTORMS ARE LIKELY WEDNESDAY AND WEDNESDAY NIGHT...WITH A SLIGHT CHANCE OF THUNDERSTORMS LINGERING INTO THURSDAY. && COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO WEBPAGE: WEATHER.GOV/CHICAGO LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868- 870-872-874-876-878-232130- LAKE MICHIGAN FROM MICHIGAN CITY IN TO ST. JOSEPH MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM SEUL CHOIX POINT TO ROCK ISLAND PASSAGE 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN SOUTH OF A LINE FROM SEUL CHOIX POINT TO THE MACKINAC BRIDGE AND NORTH OF A LINE FROM CHARLEVOIX MI TO SOUTH FOX ISLAND 5 NM OFFSHORE- LAKE MICHIGAN FROM CHARLEVOIX TO POINT BETSIE MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM POINT BETSIE TO MANISTEE MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM ROCK ISLAND PASSAGE TO STURGEON BAY WI- LAKE MICHIGAN FROM STURGEON BAY TO TWO RIVERS WI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM TWO RIVERS TO SHEBOYGAN WI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM SHEBOYGAN TO PORT WASHINGTON WI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM PORT WASHINGTON TO NORTH POINT LIGHT WI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM NORTH POINT LIGHT TO WIND POINT WI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM WIND POINT WI TO WINTHROP HARBOR IL 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM WINTHROP HARBOR TO WILMETTE HARBOR IL 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM WILMETTE HARBOR IL TO MICHIGAN CITY IN 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM PENTWATER TO MANISTEE MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM WHITEHALL TO PENTWATER MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM GRAND HAVEN TO WHITEHALL MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM HOLLAND TO GRAND HAVEN MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM SOUTH HAVEN TO HOLLAND MI 5 NM OFFSHORE TO MID LAKE- LAKE MICHIGAN FROM ST. JOSEPH TO SOUTH HAVEN MI 5 NM OFFSHORE TO MID LAKE- 426 PM CDT SUN MAY 22 2011 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE OPEN WATERS OF LAKE MICHIGAN. .DAY ONE...TONIGHT. THUNDERSTORMS WILL CONTINUE TO DEVELOP THIS EVENING. SOME STORMS MAY BECOME SEVERE AND PRODUCE LARGE HAIL...INTENSE LIGHTNING...AND WIND GUSTS IN EXCESS OF 50 KT. .DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY. THUNDERSTORMS ARE LIKELY WEDNESDAY AND WEDNESDAY NIGHT ON SOUTHERN LAKE MICHIGAN WITH A CHANCE OF THUNDERSTORMS CENTRAL SECTIONS. && COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO WEBPAGE: WEATHER.GOV/CHICAGO MERZLOCK
In the hours before
Local storm report, May 22, 8:26 PM CDT, 40 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
826 PM CDT SUN MAY 22 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0725 PM TSTM WND DMG HEBRON 42.47N 88.43W
05/22/2011 MCHENRY IL TRAINED SPOTTER
AT LEAST 8 LARGE TREES UPROOTED BLOWN DOWN IN HEBRON AREA
IN A NORTHWEST TO SOUTHEAST DIRECTION...INDICATIVE OF
STRAIGHT LINE WIND DAMAGE. ESTIMATED 10 INCH DIAMETER
TREES.7 POWERPOLES BLOWN DOWN ALONG ROUTE 47 3 MILES
SOUTH OF HEBRON.
&&
RCLocal storm report, May 22, 8:34 PM CDT, 32 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
834 PM CDT SUN MAY 22 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0725 PM TSTM WND DMG HEBRON 42.47N 88.43W
05/22/2011 MCHENRY IL TRAINED SPOTTER
POWER OUT EAST OF ROUTE 47. LARGE TREES DOWN. FENCE DOWN
AT SCHOOL.
&&
RCLocal storm report, May 22, 8:41 PM CDT, 25 minutes before
PRELIMINARY LOCAL STORM REPORT...SUMMARY
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
841 PM CDT SUN MAY 22 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0251 PM TSTM WND GST PONTIAC 40.88N 88.64W
05/22/2011 M60.00 MPH LIVINGSTON IL TRAINED SPOTTER
ALSO REPORTED NICKEL SIZE HAIL.
0303 PM HAIL ARLINGTON HEIGHTS 42.09N 87.98W
05/22/2011 E0.50 INCH COOK IL EMERGENCY MNGR
DIME SIZED HAIL AT ARLINGTON HEIGHTS RD AND GOLF RD
0305 PM HAIL 1 NW VILLA PARK 41.90N 87.99W
05/22/2011 E0.25 INCH DUPAGE IL TRAINED SPOTTER
PEA SIZE HAIL. COCORAHS OBSERVER.
0306 PM HAIL LOMBARD 41.87N 88.01W
05/22/2011 E0.75 INCH DUPAGE IL TRAINED SPOTTER
PENNY SIZED HAIL
0307 PM HAIL ARLINGTON HEIGHTS 42.09N 87.98W
05/22/2011 E1.00 INCH COOK IL TRAINED SPOTTER
E SEEGARS RD
0310 PM HAIL LOMBARD 41.87N 88.01W
05/22/2011 E1.00 INCH DUPAGE IL TRAINED SPOTTER
W MADISON ST
0318 PM TSTM WND GST FORREST 40.75N 88.41W
05/22/2011 M60.00 MPH LIVINGSTON IL TRAINED SPOTTER
POWER WENT OUT
0320 PM HAIL RIVERWOODS 42.17N 87.90W
05/22/2011 E0.25 INCH LAKE IL TRAINED SPOTTER
1/4 IN TO 3/8 IN HAIL. COCORAHS OBSERVER.
0326 PM HAIL 2 NW MELROSE PARK 41.92N 87.89W
05/22/2011 E0.25 INCH COOK IL TRAINED SPOTTER
1/4 INCH TO 3/8 INCH
0326 PM HAIL 5 W BOURBONNAIS 41.16N 87.98W
05/22/2011 E0.25 INCH KANKAKEE IL AMATEUR RADIO
3000 N AND 5000 W
0335 PM HAIL OLYMPIA FIELDS 41.52N 87.69W
05/22/2011 E0.50 INCH COOK IL AMATEUR RADIO
DIME SIZED HAIL AT VOLLMER AND GOVERNORS HWY.
0336 PM HAIL 1 S WAUKEGAN 42.36N 87.87W
05/22/2011 E0.88 INCH LAKE IL TRAINED SPOTTER
NEAR JACKSON AND BELVIDERE RD.
0339 PM HAIL BRADLEY 41.15N 87.86W
05/22/2011 M0.50 INCH KANKAKEE IL TRAINED SPOTTER
PEA TO MARBLE SIZE HAIL REPORTED AT RT. 50 AND NORTH
STREET.
0339 PM HAIL NORTH CHICAGO 42.32N 87.86W
05/22/2011 E0.75 INCH LAKE IL TRAINED SPOTTER
1/2 IN TO 3/4 IN HAIL AT 5TH AND SHERIDAN.
0340 PM HAIL CHICAGO 41.88N 87.63W
05/22/2011 E1.00 INCH COOK IL TRAINED SPOTTER
3/4 IN TO 1 INCH HAIL. 59TH AND HALSTEAD. LASTED AROUND 8
MINUTES.
0340 PM HAIL KANKAKEE 41.12N 87.86W
05/22/2011 E0.50 INCH KANKAKEE IL TRAINED SPOTTER
CURTIS AND GRACE
0340 PM TSTM WND DMG KANKAKEE 41.12N 87.86W
05/22/2011 KANKAKEE IL TRAINED SPOTTER
WEST SIDE OF CITY - 4-6 INCH DIA TREE BRANCHES DOWN. ONE
10 INCH DIA TREE DOWN AT SMALL PARK AND A LARGE BRANCH
FELL ON A VAN ON WEST HAWKINS ST.
0341 PM HAIL KANKAKEE 41.12N 87.86W
05/22/2011 E0.50 INCH KANKAKEE IL TRAINED SPOTTER
0342 PM HAIL KANKAKEE 41.12N 87.86W
05/22/2011 E0.75 INCH KANKAKEE IL AMATEUR RADIO
GRINNEL RD AND I-57.
0343 PM HAIL KANKAKEE 41.12N 87.86W
05/22/2011 E0.88 INCH KANKAKEE IL TRAINED SPOTTER
NEAR CURTIS AND STATION ST.
0343 PM TSTM WND DMG ASHKUM 40.88N 87.95W
05/22/2011 IROQUOIS IL EMERGENCY MNGR
TREE DOWN AND GRAIN BIN BLOWN OVER.
0345 PM HAIL CHICAGO 41.88N 87.63W
05/22/2011 E0.50 INCH COOK IL PUBLIC
DIME TO PEA SIXED HAIL. FAR WEST SIDE. CUMBERLAND AND
IRVING PARK RD.
0346 PM HAIL BRADLEY 41.15N 87.86W
05/22/2011 E1.50 INCH KANKAKEE IL TRAINED SPOTTER
NORTH ST AND IL-50.
0348 PM HAIL 3 N BEECHER 41.39N 87.61W
05/22/2011 E0.50 INCH WILL IL TRAINED SPOTTER
PEA TO DIME SIZED HAIL AT I394 AND GOODNOW RD.
0353 PM HAIL 2 S BEECHER 41.32N 87.61W
05/22/2011 E1.25 INCH WILL IL TRAINED SPOTTER
2 MILES S OF BEECHER ON IL-1.
0355 PM HAIL CHICAGO 41.88N 87.63W
05/22/2011 E0.25 INCH COOK IL AMATEUR RADIO
HAIL, 2 TO 2 1/2 INCHES IN DEPTH, COVERING THE GROUND.
0356 PM HAIL 1 S BEECHER 41.33N 87.61W
05/22/2011 E1.75 INCH WILL IL STORM CHASER
TRAVELING SOUTHWARD ON IL-1
0400 PM HEAVY RAIN PONTIAC 40.88N 88.64W
05/22/2011 E1.12 INCH LIVINGSTON IL TRAINED SPOTTER
RAINFALL IN 30 MINUTES. WATER OVERFLOWING MANY STREETS.
NICKEL TO QUARTER SIZE HAIL OCCURRED EARLIER. COCORAHS
OBSERVER.
0402 PM HAIL BEECHER 41.35N 87.61W
05/22/2011 E1.25 INCH WILL IL EMERGENCY MNGR
QUARTER TO HALF DOLLER SIZED HAIL AT ASHLAND RD AND
PEOTONE-BEECHER RD. HOUSE FIRE STARTED BY LIGHTNING.
0411 PM HAIL HAMMOND 41.62N 87.49W
05/22/2011 E0.50 INCH LAKE IN PUBLIC
NORTH HAMMOND. HAIL SLIGHTLY LARGER THAN 1/2 INCH IN
SIZE. RELAYED BY CHICAGO FOX NEWS.
0412 PM HAIL WHITING 41.68N 87.49W
05/22/2011 E1.00 INCH LAKE IN PUBLIC
RELAYED BY CHICAGO FOX NEWS.
0418 PM HAIL CEDAR LAKE 41.37N 87.44W
05/22/2011 E0.25 INCH LAKE IN EMERGENCY MNGR
0419 PM FLOOD GRANT PARK 41.24N 87.64W
05/22/2011 KANKAKEE IL AMATEUR RADIO
4000 E AND 9000 N - WATER COER ROADS.
0425 PM HEAVY RAIN 3 SSE BEECHER 41.31N 87.59W
05/22/2011 E1.09 INCH WILL IL TRAINED SPOTTER
RAINFALL IN 40 MINUTES. 1/2 IN TO 3/4 IN HAIL FROM 350 PM
TO 410 PM. COCORAHS OBSERVER.
0430 PM HAIL 5 NNW POLO 42.05N 89.62W
05/22/2011 E0.75 INCH OGLE IL CO-OP OBSERVER
0434 PM TSTM WND GST CRESCENT CITY 40.77N 87.86W
05/22/2011 E60.00 MPH IROQUOIS IL EMERGENCY MNGR
ESTIMATED WIND GUSTS OF 50 TO 60 MPH.
0437 PM TSTM WND DMG RENSSELAER 40.94N 87.15W
05/22/2011 JASPER IN TRAINED SPOTTER
POSSIBLE TORNADO. 1/4 MILE NORTH OF TOWN ALONG ROUTE 231.
DAMAGE TO 2 BUILDINGS AND ONE BUILDING, FARM BUREAU
OFFICE, DESTROYED. ONE BUILDING ON FIRE. LOTS OF POWER
LINES DOWN.
0445 PM HAIL DIXON 41.85N 89.48W
05/22/2011 E0.50 INCH LEE IL TRAINED SPOTTER
0447 PM TSTM WND DMG 4 W BUCKLEY 40.60N 88.11W
05/22/2011 IROQUOIS IL EMERGENCY MNGR
POWER POLES DOWN BETWEEN GILMAN AND GIBSON CITY.
0452 PM FLOOD WATSEKA 40.78N 87.73W
05/22/2011 IROQUOIS IL EMERGENCY MNGR
RAINFALL CAUSING STREET FLOODING.
0455 PM TSTM WND GST CISSNA PARK 40.57N 87.89W
05/22/2011 E63.00 MPH IROQUOIS IL EMERGENCY MNGR
AT 1359 E RD AND 1129 N RD.
0506 PM HAIL MOUNT MORRIS 42.05N 89.43W
05/22/2011 E0.75 INCH OGLE IL AMATEUR RADIO
0509 PM HAIL MOUNT MORRIS 42.05N 89.43W
05/22/2011 E1.00 INCH OGLE IL TRAINED SPOTTER
0519 PM HAIL OREGON 42.01N 89.34W
05/22/2011 E0.25 INCH OGLE IL PUBLIC
RELAYED BY WREX-TV ROCKFORD
0520 PM HAIL BYRON 42.13N 89.26W
05/22/2011 E0.25 INCH OGLE IL PUBLIC
0525 PM HEAVY RAIN 5 W WATSEKA 40.78N 87.83W
05/22/2011 E1.61 INCH IROQUOIS IL TRAINED SPOTTER
RAINFALL IN 75 MINUTES. PEA SIZED HAIL FELL DURING STORM.
0535 PM HAIL LOVES PARK 42.34N 89.01W
05/22/2011 E0.50 INCH WINNEBAGO IL TRAINED SPOTTER
CLINTON RD AND WINDSOR.
0536 PM HAIL LOVES PARK 42.34N 89.01W
05/22/2011 E1.00 INCH WINNEBAGO IL TRAINED SPOTTER
US 251 AND LOVES PARK DR.
0540 PM TSTM WND DMG 8 NE FOWLER 40.70N 87.21W
05/22/2011 BENTON IN PUBLIC
COUNTY RD 800E AND 400N. TREE DOWN FELL ON OTHER TREES
AND CAUSED DAMAGE TO LAWN DECORATIONS
0547 PM HAIL MACHESNEY PARK 42.36N 89.04W
05/22/2011 E0.25 INCH WINNEBAGO IL TRAINED SPOTTER
US 251 AND FOREST HILLS RD.
0605 PM HAIL PECATONICA 42.31N 89.36W
05/22/2011 E1.25 INCH WINNEBAGO IL PUBLIC
RELAYED BY WREX-TV
0606 PM HAIL PECATONICA 42.31N 89.36W
05/22/2011 E0.25 INCH WINNEBAGO IL TRAINED SPOTTER
N OF US-20
0634 PM TSTM WND GST MOUNT MORRIS 42.05N 89.43W
05/22/2011 E80.00 MPH OGLE IL TRAINED SPOTTER
70 TO 80 MPH NEARLY SUSTAINED FOR 5 TO 6 MINUTES. POWER
POLES SNAPPED. JUST S OF TOWN. ALSO PEA SIZED HAIL.
0635 PM TSTM WND DMG 5 SSE MOUNT MORRIS 41.98N 89.39W
05/22/2011 OGLE IL TRAINED SPOTTER
BARNS AND BUILDINGS BLOWN APART
0635 PM TSTM WND DMG ROSCOE 42.42N 89.01W
05/22/2011 WINNEBAGO IL PUBLIC
TREE KNOCKED DOWN ACROSS ROAD.
0643 PM TSTM WND DMG WINNEBAGO 42.27N 89.24W
05/22/2011 WINNEBAGO IL TRAINED SPOTTER
NUMEROUS 1 FOOT DIAMETER TREES DOWN
0649 PM HAIL ROCKFORD 42.27N 89.06W
05/22/2011 M0.75 INCH WINNEBAGO IL AMATEUR RADIO
IN SOUTHWEST ROCKFORD.
0649 PM TSTM WND GST ROCKFORD 42.27N 89.06W
05/22/2011 E70.00 MPH WINNEBAGO IL TRAINED SPOTTER
ALPINE ROAD AND HARRISON AVENUE IN SOUTHEAST ROCKFORD.
0649 PM TSTM WND DMG ROCKFORD 42.27N 89.06W
05/22/2011 WINNEBAGO IL AMATEUR RADIO
SEVERAL 4-5 INCH DIAMETER TREE BRANCHES DOWN.
0650 PM TSTM WND DMG WINNEBAGO 42.27N 89.24W
05/22/2011 WINNEBAGO IL BROADCAST MEDIA
LARGE TREE BRANCHES DOWN AND DEBRIS FLYING THROUGH THE
AIR OUTSIDE WREX STUDIOS.
0650 PM TSTM WND GST ROCKFORD 42.27N 89.06W
05/22/2011 E75.00 MPH WINNEBAGO IL TRAINED SPOTTER
NEAR I-90 AND BUS US-20.
0650 PM TSTM WND DMG ROCKFORD 42.27N 89.06W
05/22/2011 WINNEBAGO IL PUBLIC
ROOF DAMAGE AT KENNEDY MIDDLE SCHOOL. RELAYED BY WREX.
0650 PM TSTM WND DMG ROCKFORD 42.27N 89.06W
05/22/2011 WINNEBAGO IL PUBLIC
*** 1 INJ *** TREE FELL ONTO HOUSE ON CROSBY STREET.
RELAYED BY WREX.
0650 PM TSTM WND GST ROCKFORD 42.27N 89.06W
05/22/2011 E50.00 MPH WINNEBAGO IL TRAINED SPOTTER
SEVERAL SMALL TREE BRANCHES/LIMBS DOWN IN EAST CENTRAL
ROCKFORD
0650 PM HAIL ROCKFORD 42.27N 89.06W
05/22/2011 E1.00 INCH WINNEBAGO IL PUBLIC
HUFFMAN BLVD AND AUBURN ST.
0650 PM HAIL STILLMAN VALLEY 42.10N 89.18W
05/22/2011 M0.88 INCH OGLE IL TRAINED SPOTTER
JUST NORTH OF TOWN ALONG STILLMAN VALLEY ROAD. ALSO
ESTIMATED 45-50 MPH WIND GUSTS.
0653 PM HAIL 4 NW ROCKFORD 42.31N 89.12W
05/22/2011 E1.00 INCH WINNEBAGO IL CO-OP OBSERVER
NICKEL TO QUARTER SIZE
0654 PM TSTM WND DMG MACHESNEY PARK 42.36N 89.04W
05/22/2011 WINNEBAGO IL TRAINED SPOTTER
TREE LIMBS DOWN. SMALL HAM RADIO TOWERS DOWN.
0654 PM TSTM WND GST ROCKFORD AIRPORT 42.20N 89.10W
05/22/2011 M61.00 MPH WINNEBAGO IL ASOS
0655 PM TSTM WND GST ROCKFORD 42.27N 89.06W
05/22/2011 E70.00 MPH WINNEBAGO IL TRAINED SPOTTER
EAST SIDE OF ROCKFORD
0656 PM HAIL ROCKFORD 42.27N 89.06W
05/22/2011 E1.00 INCH WINNEBAGO IL TRAINED SPOTTER
ALPINE ROAD AND HARRISON ROAD IN SOUTHEAST ROCKFORD.
0656 PM HAIL ROCKFORD 42.27N 89.06W
05/22/2011 E0.75 INCH WINNEBAGO IL TRAINED SPOTTER
IN EAST CENTRAL ROCKFORD.
0658 PM TSTM WND DMG ROSCOE 42.42N 89.01W
05/22/2011 WINNEBAGO IL PUBLIC
FLAGPOLE AT DAIRY QUEEN BENT IN HALF. RELAYED BY WREX.
0700 PM HAIL ROCKFORD 42.27N 89.06W
05/22/2011 E1.50 INCH WINNEBAGO IL TRAINED SPOTTER
0700 PM HAIL ROCKFORD 42.27N 89.06W
05/22/2011 E1.25 INCH WINNEBAGO IL TRAINED SPOTTER
COVERING GROUND...NORTHEAST PORTION OF THE CITY.
0700 PM HAIL ROCKFORD 42.27N 89.06W
05/22/2011 E1.25 INCH WINNEBAGO IL TRAINED SPOTTER
COURT AND JOHN ST. NORTH OF DOWNTOWN.
0704 PM TSTM WND DMG BELVIDERE 42.25N 88.85W
05/22/2011 BOONE IL TRAINED SPOTTER
SMALL TREE BRANCHES BLOWN DOWN. ESTIMATED WIND GUSTS
ABOUT 50 MPH.
0709 PM TSTM WND GST ROSCOE 42.42N 89.01W
05/22/2011 E60.00 MPH WINNEBAGO IL TRAINED SPOTTER
PEA SIZED HAIL AND TREE LIMBS DOWN.
0710 PM HAIL BELVIDERE 42.25N 88.85W
05/22/2011 E1.00 INCH BOONE IL PUBLIC
NEAR I90 AND US 20. 1/4 MI E OF CHRYSLER PLANT.
0714 PM HAIL BELVIDERE 42.25N 88.85W
05/22/2011 E0.25 INCH BOONE IL TRAINED SPOTTER
0725 PM TSTM WND DMG HEBRON 42.47N 88.43W
05/22/2011 MCHENRY IL TRAINED SPOTTER
AT LEAST 8 LARGE TREES UPROOTED BLOWN DOWN IN HEBRON AREA
IN A NORTHWEST TO SOUTHEAST DIRECTION...INDICATIVE OF
STRAIGHT LINE WIND DAMAGE. ESTIMATED 10 INCH DIAMETER
TREES.7 POWERPOLES BLOWN DOWN ALONG ROUTE 47 3 MILES
SOUTH OF HEBRON.
0725 PM TSTM WND DMG HEBRON 42.47N 88.43W
05/22/2011 MCHENRY IL TRAINED SPOTTER
POWER OUT EAST OF ROUTE 47. LARGE TREES DOWN. FENCE DOWN
AT SCHOOL.
0819 PM TSTM WND GST MENDOTA 41.55N 89.12W
05/22/2011 E60.00 MPH LA SALLE IL NWS EMPLOYEE
WIND GUSTS ESTIMATED TO 60 MPH. NOTED BRANCHES DOWN AND
SHELF CLOUD OVERHEAD...MOVING NORTHEAST.
&&
SHEALocal storm report, May 22, 8:54 PM CDT, 12 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
854 PM CDT SUN MAY 22 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0545 PM FLASH FLOOD WATSEKA 40.78N 87.73W
05/22/2011 IROQUOIS IL EMERGENCY MNGR
STREETS CLOSED AND BARRICADED DUE TO FLOODING.
&&
RCLocal storm report, May 22, 8:58 PM CDT, 8 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
858 PM CDT SUN MAY 22 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0704 PM TSTM WND DMG POPLAR GROVE 42.37N 88.82W
05/22/2011 BOONE IL EMERGENCY MNGR
TREES AND WIRES DOWN ALL ACROSS NORTHERN PORTION OF
COUNTY.
&&
RCLocal storm report, May 22, 9:06 PM CDT, 0 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
906 PM CDT SUN MAY 22 2011
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0828 PM HAIL WAUCONDA 42.27N 88.14W
05/22/2011 E0.88 INCH LAKE IL TRAINED SPOTTER
AT INTERSECTION OF ROUTE 12 AND OLD MCHENRY ROAD.
&&
RCThe office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 22, 7:10 PM CDT | Areal Flood Advisory | LOT | Boone, Lee, Ogle, Winnebago | 119 min |
| May 22, 7:22 PM CDT | Severe Thunderstorm Warning | LOT | Lake, McHenry | 53 min |
| May 22, 7:29 PM CDT | Severe Thunderstorm Warning | LOT | Lee, Ogle, Winnebago | 61 min |
| May 22, 8:10 PM CDT | Severe Thunderstorm Warning | LOT | LaSalle | 50 min |
| May 22, 8:15 PM CDT | Severe Thunderstorm Warning | LOT | Boone, DeKalb, McHenry | 60 min |
| May 22, 8:17 PM CDT | Severe Thunderstorm Warning | LOT | Lake, McHenry | 58 min |
| May 22, 8:22 PM CDT | Special Marine Warning | LOT | 113 min | |
| May 22, 8:51 PM CDT | Severe Thunderstorm Warning | LOT | Cook, DeKalb, Kane | 26 min |
| May 22, 9:32 PM CDT | Areal Flood Warning | LOT | Iroquois | 3 hr |
| May 22, 9:38 PM CDT | Severe Thunderstorm Warning | LOT | DeKalb, Lee, Ogle | 52 min |
| May 22, 9:50 PM CDT | Severe Thunderstorm Warning | LOT | LaSalle, Lee | 37 min |
| May 22, 10:24 PM CDT | Special Weather Statement | LOT | DeKalb, DuPage, Kane, Kendall, McHenry | 66 min |
| May 22, 10:25 PM CDT | Special Marine Warning | LOT | 59 min | |
| May 22, 11:07 PM CDT | Special Weather Statement | LOT | DuPage, Kane, Kendall, Lake | 53 min |
| May 23, 9:53 AM CDT | Small Craft Advisory | LOT | 9 hr |
Nearby
Flash Flood Warnings in Illinois, 2011Every flash flood warning in 2011
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.