Alert archive / Illinois / Severe Thunderstorm Warnings in 2014
Severe Thunderstorm Warning 9, NWS Chicago, IL
NWS Chicago, IL issued this severe thunderstorm warning at May 11, 2014, 4:02 PM CDT for Boone County, McHenry County, Winnebago County, Illinois. It was in force for 58 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- May 11, 2014, 4:02 PM CDT (21:02 UTC)
- Expired
- May 11, 2014, 5:00 PM CDT
- In force
- 58 min
- Issued by
- NWS Chicago, IL
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
Counties Boone County, IL, McHenry County, IL, Winnebago County, IL
The radar
The Milwaukee radar (KMKX), 74 km from the middle of the area, began a volume at 21:04 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.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 11, 3:05 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 9.0 hours before the alert went out and 160 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
- 52 J/kg
- Mixed-layer CIN
- -261 J/kg
- Mixed-layer LCL
- 1382 m above ground
- 0-6 km bulk shear
- 28 kt
- 0-1 km storm-relative helicity
- 140 m²/s²
- 0-3 km storm-relative helicity
- 162 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this severe thunderstorm 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 severe thunderstorm warning went out at May 11, 3:51 PM CDT, 11 minutes earlier.
Area forecast discussion, May 11, 3:51 PM CDT, 11 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 351 PM CDT SUN MAY 11 2014 .MESOSCALE DISCUSSION... 335 PM CDT A SEVERE THUNDERSTORM WATCH IS IN EFFECT FOR MOST OF THE ILLINOIS FORECAST AREA AND LAKE AND PORTER COUNTIES IN NW INDIANA UNTIL 10 PM. THIS DOES INCLUDE ALL OF THE CHICAGO METRO AREA. THE PRIMARY CONCERN REMAINS LARGE HAIL AS WELL AS POTENTIAL WINDS...AND EARLY STORM TRENDS HAVE INDICATED THAT. THERE REMAINS SOME TORNADO POTENTIAL...MAINLY WEST OF ILLINOIS HIGHWAY 47. SCATTERED STORMS...SOME SEVERE...THAT HAVE DEVELOPED ACROSS NORTH CENTRAL ILLINOIS ARE ASSOCIATED WITH STRONG LOW-LEVEL WARM AND MOIST ADVECTION AND SOME STRENGTHENING LOW-LEVEL CONVERGENCE. THIS IS ALSO HELPED FROM A LOW AMPLITUDE SHORT WAVE IMPULSE AND ASSOCIATED MCV RESPONSIBLE FOR PERSISTENT CONVECTION MUCH OF TODAY ACROSS IA. CONVECTIVE INHIBITION HAS ERODED WITH MLCAPES AROUND 2000 J/KG ACROSS MUCH OF THE WESTERN AND SOUTHERN FORECAST AREA. AS A MID-LEVEL SPEED MAX ASSOCIATED WITH THE AFOREMENTIONED IMPULSE MOVES EASTWARD INTO NORTHERN ILLINOIS...DEEP LAYER SHEAR WILL ALSO INCREASE INTO EARLY EVENING. SO THE POTENTIAL WILL CONTINUE TO GROW FOR WELL-ORGANIZED SUSTAINED CONVECTION ACROSS NORTH CENTRAL ILLINOIS. IN ADDITION...SECONDARY SURFACE WARM FRONT...MORE ASSOCIATED WITH DEW POINTS IN THE UPPER 60S AND SLIGHTLY BACKING WINDS...CONTINUES TO MOVE NORTH ACROSS CENTRAL ILLINOIS. ENHANCED CUMULUS ACROSS WEST CENTRAL IL EASTWARD TOWARD BMI MAY EVOLVE INTO SCATTERED CONVECTION MOVING EAST-NORTHEAST. THAT WOULD BE ROOTED NEAR THE BOUNDARY AND OF CONCERN TO BE MORE DISCRETE AND ROOTED LOWER. AS LOW-LEVEL SHEAR VALUES INCREASE THROUGH THE NEXT SEVERAL HOURS...WILL HAVE TO MONITOR FOR SOME TORNADO POTENTIAL...AND THAT PRESENTLY IS MAINLY ACROSS THE SOUTHWEST FORECAST AREA. THOUGH WALL CLOUD REPORTS WITH INITIAL CONVECTION IN WINNEBAGO COUNTY INDICATE THAT AT LEAST THE SUPERCELL MODE IS FAIRLY HIGH ACROSS A LARGER PART OF THE FORECAST AREA THIS AFTERNOON. STORMS SHOULD SHIFT EASTWARD ACROSS THE CHICAGO METRO AREA IN THE 5-8 PM WINDOW. HOW HIGH THE COVERAGE WILL BE DEPENDS PARTLY ON HOW ACTIVE THE WARM FRONT WILL BECOME AND IF CLUSTERS OF STORMS ACROSS THE DVN CWA CAN SUSTAIN THEMSELVES AS THEY PROPAGATE EAST. HAVE GONE WITH LIKELY POPS MOST AREAS IN THE SEVERE THUNDERSTORM WATCH...WITH HIGHEST POPS ACROSS THE NORTH. MTF && .DISCUSSION... 300 PM CDT FORECAST CONCERNS ARE MAINLY ON THE IMMEDIATE SEVERE WEATHER CHANCES THROUGH EARLY/MID EVENING. ALSO FOCUS ON THE SEVERE WEATHER POTENTIAL ON MONDAY...PRIMARILY MONDAY LATE AFTERNOON INTO THE NIGHTTIME PERIOD. OVERNIGHT INTO MONDAY MORNING... STRONG UPPER JET WILL PROPAGATE AROUND THE UPPER TROUGH LATE TONIGHT INTO THE MORNING ON MONDAY AND WITH THAT LEAD TO FURTHER AMPLIFYING OF THE UPSTREAM RIDGE...INCLUDING BUILDING HEIGHTS ACROSS MUCH OF THE FORECAST AREA. MUCH OF THE FORCING FOR RAIN/STORMS IN THIS PERIOD WOULD BE FOCUSED TO THE WEST AND NORTH IN SUCH A PATTERN. THE STRONG LOW-LEVEL JET WILL AT LEAST IN PART BE OVER THE AREA...HOWEVER THE NOSE OF IT WILL BE POINTED FURTHER NORTH. CONVECTIVE CHANCES LOOK MINIMAL AND MAINLY THE NORTHWEST FORECAST AREA TOWARD ROCKFORD. CHANCES MAY BE INCREASED SOMEWHAT IF ANY ORGANIZED CONVECTION FROM THE CENTRAL PLAINS WERE TO PROPAGATE EASTWARD INTO NORTHERN IL...BUT THE GRADUALLY MORE MERIDIONAL FLOW AND ORIENTATION OF FORECAST CORFIDI VECTORS WOULD PUSH MUCH OF THE CONVECTION NORTH OF THE AREA. LOW TEMPS WILL BE BALMY WITH CONTINUED SOUTHERLY FLOW AND HIGH DEW POINT AIR...WITH SOME PLACES EXPERIENCING SOME WARMING OF TEMPS LATER THIS EVENING...ESPECIALLY THOSE IMPACTED BY EARLY EVE CONVECTION AND THOSE COMMUNITIES NEAR THE LAKE SHORE THAT HAD AFTERNOON/EVE COOLING. MONDAY AFTERNOON THROUGH TUESDAY... THE UPPER TROUGH WILL CONTINUE TO AMPLIFY AS THE UPPER JET TO ITS FRONT AND BACK INTENSITY. A WARM AND MUGGY DAY IS ANTICIPATED MONDAY. CONVECTIVE INHIBITION ON MONDAY AFTERNOON DOES LOOK TO BE OVERCOME BUT A FOCUS IS NOT OVERLY EVIDENT IN OUR FORECAST AREA. GRADUALLY MORE CONVERGENCE AND INCREASING DEEP LAYER MOISTURE AND UPWARD MOTION IS FORECAST TO MOVE EASTWARD ACROSS MAINLY NORTH CENTRAL ILLINOIS LATE IN THE DAY INTO EARLY EVE AND EASE ITS WAY EASTWARD THROUGH THE REMAINDER OF THE NIGHT. THIS LOOKS LIKE A PERIOD OF STORMS MOVING NORTHEAST WITHIN THE DEEP MOIST PLUME. THE SEVERE POTENTIAL WOULD SEEM MOST FAVORED WITH THE INITIAL CONVECTION IN THE LATE AFTERNOON/EVE AND THEN A GENERAL WANING LATER INTO THE NIGHT. LOCALLY HEAVY RAINFALL WILL BE PROBABLE IN SOME OF THESE STORMS AS THE PWATS ARE FORECAST TO BE AROUND 1.50 INCHES AND DEEP MOISTURE CONVERGENCE WILL BE ORIENTED PARALLEL TO THE UPPER FLOW. THIS PLUME WILL SHIFT EASTWARD THROUGH TUESDAY MORNING AND LIKELY POPS CERTAINLY SEEM JUSTIFIED TUESDAY MORNING. IF THE FRONT IS SLOW ENOUGH SOME AFTERNOON ENHANCEMENT OF A FEW STORMS COULD HAPPEN IN THE EAST...BUT THIS SEEMS MOST FAVORED EAST OF THE FORECAST AREA AT THIS TIME. THE COLD AIR ADVECTION WITH THE COLD FRONT...ALONG WITH POTENTIALLY SOME ANAFRONTAL SHOWERS...WILL LIKELY LEAD TO FALLING TEMPS IN SOME PLACES AT LEAST AT TIMES ON TUESDAY. WEDNESDAY AND BEYOND... LITTLE CHANGES MADE TO THIS PART OF THE FORECAST DUE TO ONGOING HIGHER IMPACT WEATHER. LARGE MODEL DIFFERENCES EXIST IN THE WED-THU TIME FRAME...WITH THE 12Z EC COMING IN SLOWER AND MORE AGGRESSIVE WITH A LOW RIDING UP THE BAROCLINIC ZONE TO OUR EAST. THIS PROVIDES WIDESPREAD SHOWERS WEDNESDAY AFTERNOON THROUGH EARLY THURSDAY AND PARTICULARY COOL TEMPS. WITH AN EC/GFS/GOING FORECAST BLEND THIS PROVIDES A FEW PERIODS OF CHANCE POPS. TEMPS TO LOOK TO BE BELOW NORMAL NO MATTER WHICH MODEL VERIFIES IN THE WED-FRI TIME FRAME. IF CONDITIONS CLEAR AND SURFACE RIDGING MOVES OVER...POSSIBLY THU NIGHT...THERE PROBABLY WILL BE A CONCERN FOR FROST. MTF && .AVIATION... //ORD AND MDW CONCERNS...UPDATED 20Z... * SCATTERED THUNDERSTORMS LATE THIS AFTERNOON AND EVENING. * LAKE BREEZE TURNING WINDS TO THE E/ESE LATE THIS AFTERNOON OR EVENING. BMD/RODRIGUEZ //DISCUSSION...UPDATED 18Z... COMPLEX WEATHER SITUATION WILL BRING A COUPLE DECENT CHANCES FOR THUNDERSTORMS THIS FORECAST PERIOD...AS WELL AS CHANGING WIND CONDITIONS. TODAY LOW PRESSURE IS TAKING SHAPE WITH AN ILL-DEFINED WARM FRONT LIFTING NORTH ACROSS ILLINOIS. THE NEXT FEW HOURS SHOULD BE RELATIVELY QUIET AT THE TERMINALS WITH A LIGHT SOUTH WIND AND VFR CONDITIONS. VERY UNSTABLE CONDITIONS ARE DEVELOPING HOWEVER...AND ALREADY SEEING SIGNS ON SATELLITE IMAGERY OF DEEPENING CLOUD GROWTH OVER PORTIONS OF MISSOURI AND IOWA. THE THUNDERSTORMS ALREADY IN PLACE ACROSS SOUTHERN IOWA ARE EXPECTED TO CONTINUE EAST TODAY...ALONG WITH NEW DEVELOPMENT AHEAD WHICH WILL THEN LIFT EAST/NORTHEAST ACROSS THE FORECAST AREA. COVERAGE REMAINS UNCERTAIN...HOWEVER GIVEN THE RELATIVELY WEAK SYNOPTIC FORCING WOULD EXPECT IT TO BE SOMEWHAT SCATTERED IN NATURE. ANY THUNDERSTORMS THAT DO DEVELOP HAVE THE POTENTIAL TO BE STRONG TO SEVERE WITH HAIL AND VERY GUSTY WINDS. WHILE THERE WILL LIKELY BE TIMING ADJUSTMENTS AS WE NEAR THE EVENT...STILL FEEL THE BEST TIME FOR TSRA AT THE TERMINALS WILL BE MID TO LATE THIS AFTERNOON INTO THE EVENING. IN ADDITION TO CONCERNS FOR TSRA THIS AFTERNOON...THERE ALSO REMAINS THE POSSIBILITY OF A WIND SHIFT TO THE EAST DUE TO A LAKE BREEZE. COASTAL OBS REMAIN SOUTHERLY THIS HOUR SO THERE IS NO SIGN OF DEVELOPMENT YET...AND WINDS WILL BE OF MARGINAL STRENGTH FOR A LAKE BREEZE TO MAKE IT ALL THE WAY INLAND TO THE TERMINALS. THIS MEANS THAT THERE IS LOW CERTAINTY ON THE WIND DIRECTION THIS AFTERNOON. SEVERAL HIGHER RES MODELS CONTINUE TO BRING IT THROUGH SO WOULD PREFER TO NOT MAKE ANY SIGNIFICANT CHANGES AT THIS TIME. FURTHER COMPLICATING MATTERS WILL BE THE POTENTIAL FOR THUNDERSTORMS DEVELOPING ON ANY LAKE BREEZE THAT DEVELOPS WHICH COULD THEN GET AN ASSIST FROM OUTFLOWS THAT DEVELOP. ADDITIONAL THUNDERSTORMS ARE POSSIBLE AGAIN MONDAY AFTERNOON/EVENING AND AGAIN COULD BE STRONG...BUT CURRENT TIMING PLACES IT BEYOND THE CURRENT FORECAST PERIOD. BMD //ORD AND MDW CONFIDENCE...UPDATED 20Z... * MEDIUM CONFIDENCE IN SCATTERED TSRA AND TIMING. * MEDIUM CONFIDENCE IN LAKE BREEZE DEVELOPING...LOW/MEDIUM CONFIDENCE IN TIMING THROUGH TERMINALS. BMD/RODRIGUEZ //OUTLOOK FOR ORD/MDW FOR 00Z TUESDAY-12Z SUNDAY...UPDATED 12Z... MONDAY NIGHT...PERIODS OF SHRA/TSRA POSSIBLE. TUESDAY THROUGH SATURDAY...PERIODIC CHANCES OF SHRA. KJB && .MARINE... 242 PM...LOW PRESSURE OVER KANSAS WILL MOVE NORTHEAST TO LAKE SUPERIOR TUESDAY MORNING. AS IT DOES...A WARM FRONT EXTENDING EAST FROM THE LOW WILL MOVE NORTH ACROSS THE LAKE TONIGHT THROUGH MONDAY NIGHT...SHIFTING EASTERLY WINDS SOUTHERLY. LOW LEVEL MOISTURE WILL ALSO BE INCREASING AND AS IT SPREADS ACROSS THE COOLER LAKE...AREAS OF FOG ARE POSSIBLE AND SOME OF THE FOG MAY BECOME DENSE. CURRENT WIND SPEEDS ARE FAIRLY LIGHT IN THE 5-15 KT RANGE AND WILL INCREASE INTO THE 15-25KT RANGE AND REMAIN THERE UNTIL A COLD FRONT MOVES ACROSS THE LAKE TUESDAY MORNING. THERE IS A POTENTIAL FOR WINDS TO BE A BIT STRONGER ON MONDAY...ESPECIALLY WITH THE EASTERLY FLOW NORTH OF THE WARM FRONT ACROSS NORTHERN LAKE MICHIGAN. THERE REMAINS UNCERTAINTY REGARDING THE POTENTIAL FOR STRONG NORTHERLY WINDS WEDNESDAY NIGHT INTO THURSDAY AS LOW PRESSURE DEEPENS MOVING NORTH ACROSS THE GREAT LAKES REGION. THIS TIME PERIOD WILL NEED TO BE MONITORED FOR HIGHER NORTHERLY WIND SPEEDS. CMS && .LOT WATCHES/WARNINGS/ADVISORIES... IL...NONE. IN...NONE. LM...NONE. && VISIT US AT HTTP://WEATHER.GOV/CHICAGO (ALL LOWERCASE) FOLLOW US ON FACEBOOK...TWITTER...AND YOUTUBE AT: WWW.FACEBOOK.COM/US.NATIONALWEATHERSERVICE.CHICAGO.GOV WWW.TWITTER.COM/NWSCHICAGO WWW.YOUTUBE.COM/NWSCHICAGO
Hazardous weather outlook, May 11, 10:44 AM CDT, 5 hours 18 minutes before
HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL
1044 AM CDT SUN MAY 11 2014
ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019-
121545-
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-
1044 AM CDT SUN MAY 11 2014 /1144 AM EDT SUN MAY 11 2014/
THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS...
NORTHEAST ILLINOIS AND NORTHWEST INDIANA.
.DAY ONE...THIS AFTERNOON AND TONIGHT.
WEATHER HAZARDS EXPECTED:
SCATTERED THUNDERSTORMS...SOME COULD BE SEVERE WITH:
HAIL UP TO THE SIZE OF GOLF BALLS.
DAMAGING WINDS OVER 60 MPH.
TORRENTIAL DOWNPOURS.
FREQUENT LIGHTNING.
ALONG WITH SOME TORNADO POTENTIAL.
AREAS AFFECTED AND TIMING:
SCATTERED THUNDERSTORMS WILL LIKELY DEVELOP BETWEEN 2 PM AND 5
PM WITH THE HIGHEST CHANCES FOR INITIAL DEVELOPMENT BEING SOUTH
OF INTERSTATES 88 AND 290. STORMS WILL LIKELY MOVE NORTHEAST
OR EAST. THE SEVERE THUNDERSTORM THREAT APPEARS HIGHEST BETWEEN
3 PM AND 9 PM...WITH A CHANCE OF MAINLY NON-SEVERE THUNDERSTORMS
LINGERING THROUGH TONIGHT.
DISCUSSION:
A WARM FRONT WILL LIFT NORTH INTO NORTHERN ILLINOIS EARLY THIS
AFTERNOON WITH THE ATMOSPHERE BECOMING QUITE UNSTABLE IN ADVANCE
OF AND NEAR THIS WARM FRONT. SCATTERED THUNDERSTORMS ARE
EXPECTED TO DEVELOP BY MID AFTERNOON AND CONTINUE INTO THE MID
EVENING HOURS. WINDS ALOFT ARE FORECAST TO BECOME INCREASINGLY
FAVORABLE FOR SEVERE THUNDERSTORMS...SO THAT ANY STORMS THAT DO
DEVELOP COULD EASILY BECOME SEVERE LATE THIS AFTERNOON INTO VERY
EARLY THIS EVENING. THE PRIMARY HAZARD APPEARS TO BE LARGE
HAIL...POSSIBLY UP TO THE SIZE OF GOLF BALLS OR PERHAPS A BIT
LARGER IN SPOTS. THERE ARE INDICATIONS THAT THERE COULD BE A
WINDOW OF OPPORTUNITY FOR THUNDERSTORMS TO POTENTIALLY BECOME
TORNADIC...ESPECIALLY BETWEEN 4 PM AND 8 PM THIS EVENING.
WHILE SOME LINGERING CHANCE OF STORMS WILL CONTINUE
LATE THIS EVENING AND OVERNIGHT...THE GREATEST FOCUS FOR
THUNDERSTORM DEVELOPMENT WILL LIKELY SHIFT NORTH INTO WISCONSIN.
.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.
THERE IS A CHANCE OF THUNDERSTORMS MONDAY WITH THE THREAT
INCREASING MONDAY NIGHT. THERE DOES APPEAR TO BE SOME LIMITED
THREAT OF ISOLATED SEVERE THUNDERSTORMS MONDAY NIGHT...MAINLY
WEST TOWARD THE INTERSTATE 39 CORRIDOR. THERE IS A SLIGHT CHANCE
THAT THUNDERSTORMS COULD LINGER INTO TUESDAY MORNING...ESPECIALLY
OVER NORTHWEST INDIANA.
.SPOTTER INFORMATION STATEMENT...
SPOTTERS ACTIVATION MAY BE NEEDED FROM MID AFTERNOON THROUGH MID
EVENING.
&&
LMZ740>745-121545-
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-
1044 AM CDT SUN MAY 11 2014
THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE ILLINOIS NEARSHORE
WATERS OF LAKE MICHIGAN AND THE INDIANA NEARSHORE WATERS OF LAKE
MICHIGAN.
.DAY ONE...THIS AFTERNOON AND TONIGHT.
SCATTERED THUNDERSTORMS ARE EXPECTED THIS AFTERNOON INTO EARLY
THIS EVENING...WITH A LESSER CHANCE OF THUNDERSTORMS LINGERING
THROUGH OVERNIGHT. SOME OF THE STORMS COULD PRODUCE LARGE HAIL
AND WIND GUSTS OVER 35 KNOTS THIS AFTERNOON AND EVENING.
.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.
THERE IS A SLIGHT CHANCE OF THUNDERSTORMS MONDAY...WITH THE
THREAT OF THUNDERSTORMS INCREASING MONDAY NIGHT AND POTENTIALLY
LINGERING INTO TUESDAY MORNING. SOME THREAT DOES EXISTS FOR
THUNDERSTORMS MONDAY NIGHT TO PRODUCE WIND GUSTS OVER 35 KNOTS.
STRONG WINDS WILL LEAD TO HAZARDOUS CONDITIONS FOR SMALL CRAFT
MONDAY.
&&
LMZ080-261-362-364-366-563-565-567-669-671-673-675-777-779-868-
870-872-874-876-878-121545-
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-
1044 AM CDT SUN MAY 11 2014
THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE OPEN WATERS OF LAKE
MICHIGAN.
.DAY ONE...THIS AFTERNOON AND TONIGHT.
THUNDERSTORMS ARE POSSIBLE OVER SOUTHERN PORTIONS OF THE LAKE
LATER THIS AFTERNOON WITH THE THREAT SPREADING NORTH ACROSS THE
LAKE TONIGHT. SOME OF THE STORMS COULD PRODUCE LARGE HAIL AND WIND
GUSTS OVER 35 KNOTS.
.DAYS TWO THROUGH SEVEN...MONDAY THROUGH SATURDAY.
THUNDERSTORMS ARE POSSIBLE MONDAY THROUGH TUESDAY MORNING...SOME
MAY BE SEVERE.
DENSE FOG IS POSSIBLE MONDAY AND MONDAY NIGHT.
&&
IZZI/MTF
VISIT US AT HTTP://WEATHER.GOV/CHICAGO (ALL LOWERCASE)
FOLLOW US ON FACEBOOK...TWITTER...AND YOUTUBE AT:
WWW.FACEBOOK.COM/US.NATIONALWEATHERSERVICE.CHICAGO.GOV
WWW.TWITTER.COM/NWSCHICAGO
WWW.YOUTUBE.COM/NWSCHICAGOIn the hours before
Local storm report, May 11, 3:03 PM CDT, 59 minutes before
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</html>Local storm report, May 11, 3:32 PM CDT, 30 minutes before
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</html>The office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 11, 2:54 PM CDT | Severe Thunderstorm Warning | LOT | Boone, McHenry, Winnebago | 66 min |
| May 11, 3:19 PM CDT | Severe Thunderstorm Warning | LOT | Boone, Ogle, Winnebago | 56 min |
| May 11, 3:48 PM CDT | Severe Thunderstorm Warning | LOT | Lee | 57 min |
| May 11, 4:32 PM CDT | Severe Thunderstorm Warning | LOT | Lake, McHenry | 58 min |
| May 11, 4:36 PM CDT | Severe Thunderstorm Warning | LOT | DuPage, Kane | 54 min |
| May 11, 4:50 PM CDT | Severe Thunderstorm Warning | LOT | LaSalle, Livingston | 55 min |
| May 11, 5:01 PM CDT | Severe Thunderstorm Warning | LOT | Ford, Iroquois, Livingston | 59 min |
| May 11, 5:14 PM CDT | Special Marine Warning | LOT | 2 hr | |
| May 11, 5:15 PM CDT | Severe Thunderstorm Warning | LOT | Lake, McHenry | 45 min |
| May 11, 5:26 PM CDT | Severe Thunderstorm Warning | LOT | Ford, Grundy, Iroquois, Kankakee, Kendall, Livingston and 1 more | 64 min |
| May 11, 5:44 PM CDT | Severe Thunderstorm Warning | LOT | Grundy, Kendall, LaSalle, Livingston | 61 min |
| May 11, 5:50 PM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage | 55 min |
| May 11, 5:52 PM CDT | Special Marine Warning | LOT | 113 min | |
| May 11, 6:10 PM CDT | Severe Thunderstorm Warning | LOT | Cook, Kendall, Will | 35 min |
| May 11, 6:20 PM CDT | Areal Flood Advisory | LOT | Cook, DeKalb, DuPage, Ford, Grundy, Iroquois and 6 more | 3 hr |
| May 11, 6:32 PM CDT | Severe Thunderstorm Warning | LOT | Cook, Will | 58 min |
| May 11, 6:57 PM CDT | Flash Flood Warning | LOT | Cook, Ford, Grundy, Iroquois, Kankakee, Kendall and 2 more | 4 hr |
| May 11, 6:19 PM CDT | Severe Thunderstorm Warning | LOT | Jasper, Lake, Newton, Porter | 56 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 2014Every severe thunderstorm warning in 2014
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.