Alert archive / Illinois / Flash Flood Watches in 2012
Flash Flood Watch 1, NWS Chicago, IL
NWS Chicago, IL issued this flash flood watch at May 3, 2012, 8:43 PM CDT for 6 counties in Illinois; Lake County, Porter County, Indiana. It was in force for 7 hr.
The area
The counties it named.
The facts
- Issued
- May 3, 2012, 8:43 PM CDT (01:43 UTC)
- Expired
- May 4, 2012, 3:38 AM CDT
- In force
- 7 hr
- Issued by
- NWS Chicago, IL
- Flood severity
- None
Counties DuPage County, IL, Grundy County, IL, Kankakee County, IL, Kendall County, IL, LaSalle County, IL, Livingston County, IL, Lake County, IN, Porter County, IN
The radar
The Chicago radar (KLOT), 24 km from the middle of the area, began a volume at 01:43 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 nearest sounding before it
Lincoln, IL (KILX), launched 00:00Z, 1.7 hours before the alert went out and 144 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
- 1905 J/kg
- Mixed-layer CIN
- -30 J/kg
- Mixed-layer LCL
- 1071 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 12 m²/s²
- 0-3 km storm-relative helicity
- 96 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.3
What forecasters said that day
The local office's own words before this flash flood watch 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 watch went out at May 3, 8:24 PM CDT, 19 minutes earlier.
Area forecast discussion, May 3, 8:24 PM CDT, 19 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 824 PM CDT THU MAY 3 2012 .MESOSCALE DISCUSSION... 815 PM CDT MAIN CONCERN FOR THE REST OF THE NIGHT IS FLASH FLOOD POTENTIAL. TRAINING STORMS OVER NORTHEAST DUPAGE AND NORTHERN COOK COUNTY CONTINUE TO REGENERATE. SOME ALSO PRODUCING SEVERE HAIL. OTHER SLOW MOVING HEAVY RAIN PRODUCERS OVER BUREAU-LASALLE COUNTIES...AND YET ANOTHER CLUSTER OF STORMS MOVING IN FROM EASTERN IA. SPC ANALYSIS INDICATES RIBBON OF PRECIPITABLE WATER IN EXCESS OF 1.5 FROM WEST CENTRAL TO NORTHEAST ILLINOIS. THIS IS ALSO AN AREA OF HIGH 850 MOISTURE TRANSPORT. HRRR INDICATING HEAVIEST RAIN IN THIS CORRIDOR AS WELL. WILL BE ISSUING A FLASH FLOOD WATCH FOR OVERNIGHT FOR ALL BUT THE NORTH TIER OF COUNTIES. ALLSOPP && .DISCUSSION... 315 PM CDT TONIGHT... SHOWER AND THUNDERSTORM ACTIVITY IS EXPECTED TO BE ONGOING OVERNIGHT AND IT IS DIFFICULT TO ADD ANY SPECIFICS THIS AFTERNOON AS TO WHEN THE HEAVIEST OF ACTIVITY WILL POP AND MOVE ACROSS...AS GUIDANCE HAS BEEN STRUGGLING TO LATCH ONTO A SOLID SOLUTION. THE HRRR AND RAP HAVE BEEN PRETTY CONSISTENT FROM RUN TO RUN IN DEVELOPING CONVECTION ACROSS THE NORTHERN BORDER THIS AFTERNOON AND EVENING...BUT AS THE MODELS HAVE BEEN UNDER PERFORMING THE LAST FEW DAYS...NOT GOING TO COMPLETELY BITE OFF ON ANY ONE SOLUTION HAPPENING THIS EVENING...LEADING TO A LOW CONFIDENCE OVERNIGHT FORECAST. DO BELIEVE THAT THE ONGOING ACTIVITY FROM MKE TO ROUGHLY MSN WILL TRY TO WORK SOUTH WHILE MOVING EAST...BUT WILL DEFER TO SPECIFICS THAT FALL WITHIN THE MESO AFD ABOVE. FRONT WILL SLOWLY BE SAGGING SOUTH ACROSS SOUTHERN WISCONSIN AND WORK INTO ILLINOIS THROUGH THE OVERNIGHT HOURS. ACTIVITY WILL THEN BE ON THE WANE AS WE GET CLOSER TO THE MORNING. THE STRONG WARM AIR ADVECTION THAT SHOT TEMPERATURES INTO THE 80S TODAY WILL SHIFT SOUTH. WITH THE FRONT DROPPING THROUGH AND ACROSS CHICAGO...WINDS WILL FLIP AROUND TO THE NORTHEAST AND PULL A COOLER MARINE AIRMASS ACROSS MUCH OF THE COASTLINE. MODELS CONTINUE TO SLOW THIS TREND SLIGHTLY OVER PREVIOUS RUNS...BUT DOES CONTINUE TO KEEP IT DRAPED ACROSS THE AREA. FORECAST SOUNDINGS AND RAW NUMERICAL GUIDANCE HIGHLIGHTS GOOD INSTABILITY TO PERSIST SOUTH AND WEST OF THIS FEATURE...THOUGH THE BEST INSTABILITY WILL BE WEST ACROSS IOWA...AND OVERALL EFFECTIVE SHEAR WILL IS SUGGESTED TO BE AT OR BELOW 30 KT INTO THE PEAK OF THE AFTERNOON. SPC HAS MOST OF THE CWA IN A SLIGHT RISK FOR SEVERE STORMS TOMORROW...BUT IT DOES FOLLOW THE OVERALL LOCATION OF THE FRONT...FAVORING AREAS WITH THE BEST INSTABILITY. WITH NO REAL FORCING WIGGLING THROUGH THE FLOW TOMORROW...THE OVERALL THREAT DOES NOT APPEAR TO BE HIGH...BUT CANNOT RULE OUT THE POSSIBILITY OF SOME UNORGANIZED CELLS DEVELOPING WITH MARGINAL SEVERE HAIL AND WIND GUSTS. DID MAKE BIGGER CHANGES TO THE DAYTIME HIGHS ACROSS LAKE AND COOK COUNTIES. WITH THE FRONT SAGGING SOUTH OF MOST THE METRO INTO THE EARLY AFTERNOON...SHOULD SEE TEMPS HIT THEIR PEAK IN THE EARLY AFTERNOON AND THEN FALL. STILL SOME CONSIDERABLE DIFFERENCES BETWEEN THE MAV AND THE MET THIS AFTERNOON...WITH A 10+ DEGREE DIFFERENCE BETWEEN THE TWO. THE THOUGHT IS THAT WITH THE FRONT TO THE SOUTH...MOST COASTAL AREAS /INCLUDING THE CHICAGO METRO/ WILL SEE HIGHS PEAKING IN THE UPPER 60S TO AROUND 70 BEFORE FALLING INTO THE AFTERNOON...THOUGH IF MORE RAIN FALLS OVERNIGHT AND KEEPS CLOUDS IN...MID 60S COULD BE PUSHING IT. BY THE WEEKEND...UPPER LEVEL RIDGING ACROSS THE FOUR CORNERS REGION WILL BEGIN TO SHIFT EAST AND OVERHEAD...BUT CONTINUED DISPARITY BETWEEN LONG RANGE GUIDANCE IS LEADING TO FURTHER LOW END CONFIDENCE ON PRECIP CHANCES INTO THE NEXT WEEK. TRENDS ARE INDICATING A WEAK SHORTWAVE ROLLING ACROSS THE RIDGE LATE SUNDAY AND INTO MONDAY WILL BRING THE NEXT BEST CHANCE FOR SHOWERS. AS THE RIDGE SLIDES EAST AND A TROUGH MOVES THROUGH...WILL GENERALLY FALL BACK INTO A COOLER NORTHWESTERLY FLOW REGIME KEEPING DAYTIME HIGHS CLOSE TO SEASONAL WITH OFF AND ON CHANCES THROUGH THE WEEK. SHEA && .AVIATION... //ORD AND MDW CONCERNS...UPDATED 00Z... * POTENTIAL FOR ADDITIONAL ROUNDS OF CONVECTION THIS EVENING/OVERNIGHT. * NORTHEASTERLY WINDS AND LOW MVFR OR IFR CIGS DEVELOPING EARLY FRIDAY MORNING. KJB //DISCUSSION...UPDATED 00Z... THE MAIN CONCERNS DURING THE PERIOD WILL THE POTENTIAL FOR SEVERAL ROUNDS OF CONVECTION THROUGH THIS EVENING/OVERNIGHT AND A GOOD POTENTIAL TO SEE SOME LOW MVFR AND IFR CIGS ON FRIDAY. A BROKEN LINE OF CONVECTION HAS DEVELOPED ACROSS NORTHERN ILLINOIS WITH SOME TRAINING OF CELLS NOTED. A STRONG STORM JUST MOVED ACROSS KORD...WITH ADDITIONAL CELLS DEVELOPING TO THE WEST ACROSS DUPAGE COUNTY. THESE STORMS LOOK TO MOVE ACROSS KORD THOUGH THE NEXT HOUR OR TWO. ADDITIONAL STORMS ARE EXPECTED LATER THIS EVENING INTO THE OVERNIGHT HOURS AS ADDITIONAL CONVECTION CURRENTLY FIRING UP ACROSS NORTHERN MO AND FAR SOUTHERN IOWA IS EXPECTED TO MOVE EASTWARD ACROSS ILLINOIS. THE ENVIRONMENT LOOKS TO SUPPORT TRAINING CELLS TONIGHT...WHICH COULD LEAD TO SEVERAL HOURS OF THUNDER IN SOME AREAS. THE BIG QUESTION MARK IS WHERE THESE TRAINING CELLS WILL SET UP. THERE ARE SOME INDICATIONS THAT THE MAIN AREA OF CONVECTION COULD SHIFT JUST TO THE SOUTH OF THE TERMINALS THIS EVENING ALONG AN AREA OF GOOD MOISTURE CONVERGENCE AHEAD OF AN APPROACHING MID LEVEL SHORT WAVE DISTURBANCE. IF THIS DOES OCCUR THE TERMINALS WILL MISS OUT ON MOST OF THE ACTIVITY. THE WINDS WILL TURN NORTHEASTERLY OFF OF LAKE MICHIGAN EARLY ON FRIDAY MORNING. IT APPEARS THAT LOW CLOUDS WILL ALSO MOVE ACROSS THE AREA...WITH IFR CIGS POSSIBLE FOR MUCH OF DAY. KJB //ORD AND MDW CONFIDENCE...UPDATED 00Z... * LOW CONFIDENCE ON THUNDERSTORMS TRENDS LATER THIS EVENING/OVERNIGHT. * MEDIUM TO HIGH CONFIDENCE ON WIND TRENDS. * MEDIUM TO HIGH CONFIDENCE IN LOW MVFR/IFR CIGS ON FRIDAY. KJB //OUTLOOK FOR ORD/MDW FOR 12Z SATURDAY-12Z THURSDAY...UPDATED 00Z... SATURDAY THROUGH TUESDAY...GENERALLY PREVAILING VFR BUT WITH PERIODIC CHANCES FOR SHRA/TSRA. BEST CHANCES FOR TSRA APPEAR TO BE FRIDAY INTO THE WEEKEND. WEDNESDAY...CHANCE SHRA. OTRW...VFR. KJB && .MARINE... 223 PM CDT BROAD LOW PRESSURE WILL EVOLVE EAST ACROSS THE CENTRAL PORTION OF LAKE MICHIGAN TONIGHT. IN ASSOCIATION WITH THIS FEATURE...CLUSTERS OF THUNDERSTORMS WILL TRAVERSE ACROSS THE SOUTHERN TWO-THIRDS OF THE LAKE...SOME OF THESE POTENTIALLY PRODUCING GUSTY WINDS IN EXCESS OF 35 KTS. GUSTY SOUTHWEST WINDS WILL CONTINUE INTO EARLY THIS EVENING FROM CHICAGO EASTWARD ACROSS NEARSHORE AREAS...POTENTIALLY CONTINUING INTO SMALL CRAFT ADVISORY CRITERIA THROUGH 8 OR 9 PM. THE LOW WILL STEER A COLD FRONT SLOWLY SOUTHWARD ACROSS THE LAKE TONIGHT INTO FRIDAY MORNING. THIS WILL REACH THE SOUTHERN PORTION OF THE LAKE BY MIDDAY FRIDAY. NORTHEAST WINDS WILL TURN EAST THIS WEEKEND AS LOW PRESSURE EVOLVES EASTWARD FROM THE CENTRAL PLAINS...REACHING THE SOUTHERN GREAT LAKES TO MIDDLE OHIO VALLEY BY SOMETIME EARLY NEXT WEEK. MTF && .LOT WATCHES/WARNINGS/ADVISORIES... IL...NONE. IN...NONE. LM...SMALL CRAFT ADVISORY...INDIANA NEARSHORE WATERS UNTIL 10 PM THURSDAY. &&
Hazardous weather outlook, May 3, 4:50 PM CDT, 3 hours 53 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE CHICAGO/ROMEOVILLE IL 450 PM CDT THU MAY 3 2012 ILZ003>006-008-010>014-019>023-032-033-039-INZ001-002-010-011-019- 042200- 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- 450 PM CDT THU MAY 3 2012 /550 PM EDT THU MAY 3 2012/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR NORTH CENTRAL ILLINOIS... NORTHEAST ILLINOIS AND NORTHWEST INDIANA. .DAY ONE...TONIGHT. WEATHER HAZARDS EXPECTED: THUNDERSTORMS...SOME MAY PRODUCE: HAIL TO THE SIZE OF QUARTERS WIND GUSTS IN EXCESS OF 60 MPH HEAVY RAINFALL...WITH LOCALIZED FLOODING ISOLATED TORNADOES CLOUD TO GROUND LIGHTNING. AREAS AFFECTED AND TIMING: THUNDERSTORMS ARE POSSIBLE THIS EVENING...WITH A THREAT OF DAMAGING WIND AND HAIL. SOME OF THESE STORMS MAY BE SEVERE AND THE THREAT FOR AN ISOLATED TORNADO SOUTH AND WEST OF A MENDOTA TO MORRIS TO PAXTON LINE CANNOT BE RULED OUT. THESE STORMS MAY LINGER INTO THE OVERNIGHT HOURS. DISCUSSION: THUNDERSTORM DEVELOPMENT IS POSSIBLE ACROSS NORTH CENTRAL AND NORTHEASTERN ILLINOIS THIS EVENING AS WARM AND HUMID AIR INTERACTS WITH SURFACE FEATURES FROM STORMS AND A FRONT MOVING SOUTH ACROSS WISCONSIN. CHANCES FOR THUNDERSTORM ACTIVITY ARE LIKELY TO INCREASE INTO THE EVENING HOURS AS THIS BOUNDARY SLOWLY SAGS SOUTH. FARTHER SOUTH AND WEST...INTO WEST CENTRAL ILLINOIS IS THE THREAT FOR TORNADOES AS HIGH INSTABILITY AND BACKING WIND FIELDS SUPPORT THE POTENTIAL FOR ROTATING UPDRAFTS. IN ADDITION TO THESE THREATS OVERNIGHT ARE THE POTENTIAL FOR ISOLATED HEAVY RAINFALL AMOUNTS THAT COULD LEAVE TO POSSIBLE FLASH FLOODING. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. POTENTIAL WILL EXIST FOR SEVERE THUNDERSTORMS FRIDAY...WITH THE PRIMARY THREATS BEING LARGE HAIL AND DAMAGING WIND. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED TONIGHT. && COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO WEBPAGE: WEATHER.GOV/CHICAGO LMZ740>745-042200- 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- 450 PM CDT THU MAY 3 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE ILLINOIS NEARSHORE WATERS OF LAKE MICHIGAN AND THE INDIANA NEARSHORE WATERS OF LAKE MICHIGAN. .DAY ONE...TONIGHT. STRONG WINDS WILL LEAD TO HAZARDOUS CONDITIONS FOR SMALL CRAFT FOR BOTH THE ILLINOIS AND INDIANA NEARSHORE WATERS THROUGH THIS EVENING. POTENTIAL EXISTS FOR THUNDERSTORMS TONIGHT...WITH THE PRIMARY THREATS BEING LARGE HAIL AND GUSTS OVER 50 KT. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. THERE WILL BE PERIODIC CHANCES FOR THUNDERSTORMS THROUGH MONDAY...WITH SOME OF THE THUNDERSTORMS ON THURSDAY POSSIBLY BECOMING SEVERE AND PRODUCING LARGE HAIL AND WIND GUSTS OVER 50 KNOTS. && 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- 870-872-874-876-878-042200- 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- 450 PM CDT THU MAY 3 2012 THIS HAZARDOUS WEATHER OUTLOOK IS FOR THE OPEN WATERS OF LAKE MICHIGAN. .DAY ONE...TONIGHT. THUNDERSTORMS ARE LIKELY TODAY ACROSS THE NORTH HALF OF LAKE MICHIGAN AND POTENTIAL EXISTS FOR THUNDERSTORMS AGAIN TONIGHT...WITH THE PRIMARY THREATS BEING LARGE HAIL AND GUSTS OVER 50 KT. AREAS OF FOG ARE LIKELY ACROSS CENTRAL AND NORTHERN LAKE MICHIGAN TODAY...WITH SOME PATCHY AREAS OF DENSE FOG REDUCING VISIBILITIES BELOW ONE MILE. .DAYS TWO THROUGH SEVEN...FRIDAY THROUGH WEDNESDAY. THERE WILL BE PERIODIC CHANCES FOR THUNDERSTORMS THROUGH TUESDAY. SOME OF THE THUNDERSTORMS ON THURSDAY MAY BE SEVERE WITH LARGE HAIL AND WIND GUSTS OVER 50 KNOTS. && COMPLETE FORECAST INFORMATION IS AVAILABLE ON THE NWS CHICAGO WEBPAGE: WEATHER.GOV/CHICAGO SHEA
In the hours before
Local storm report, May 3, 8:22 PM CDT, 21 minutes before
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</html>Local storm report, May 3, 8:32 PM CDT, 11 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 3, 7:08 PM CDT | Severe Thunderstorm Warning | LOT | Cook | 67 min |
| May 3, 7:23 PM CDT | Flash Flood Warning | LOT | Cook, DuPage | 4 hr |
| May 3, 8:00 PM CDT | Severe Thunderstorm Warning | LOT | Cook, DuPage | 75 min |
| May 3, 8:07 PM CDT | Severe Thunderstorm Warning | LOT | LaSalle, Livingston | 68 min |
| May 3, 8:12 PM CDT | Special Marine Warning | LOT | 2 hr | |
| May 3, 9:19 PM CDT | Special Marine Warning | LOT | 116 min | |
| May 3, 9:29 PM CDT | Special Weather Statement | LOT | Will | 31 min |
| May 3, 9:50 PM CDT | Severe Thunderstorm Warning | LOT | Cook, Will | 55 min |
| May 3, 10:10 PM CDT | Flash Flood Warning | LOT | Cook | 5 hr |
| May 3, 10:47 PM CDT | Special Weather Statement | LOT | Cook | 28 min |
| May 4, 12:34 AM CDT | Severe Thunderstorm Warning | LOT | Grundy, LaSalle, Livingston | 71 min |
| May 4, 12:46 AM CDT | Flash Flood Warning | LOT | LaSalle, Livingston | 6 hr |
| May 4, 1:26 AM CDT | Severe Thunderstorm Warning | LOT | Ford, Grundy, Iroquois, Kankakee, Livingston | 63 min |
| May 4, 3:07 AM CDT | Marine Dense Fog Advisory | LOT | 18 hr |
Nearby
Flash Flood Watches in Illinois, 2012Flash Flood Watches in Indiana, 2012Every flash flood watch in 2012
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.