Alert archive / Illinois / Flash Flood Warnings in 2004

Flash Flood Warning 2, NWS Paducah, KY

April 21, 2004Jackson County, Williamson County, Illinois

NWS Paducah, KY issued this flash flood warning at Apr 21, 2004, 7:45 PM CDT for Jackson County, Williamson County, Illinois. It was in force for 2 hr. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Apr 21, 2004, 7:45 PM CDT (00:45 UTC)
Expired
Apr 21, 2004, 10:00 PM CDT
In force
2 hr
Issued by
NWS Paducah, KY
Area
Counties, with a storm outline in the text

Counties Jackson County, IL, Williamson County, IL

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

Lincoln, IL (KILX), launched 00:00Z, 0.8 hours before the alert went out and 259 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-pSkew-T log-p diagram, Lincoln, IL at 00:00Z on 2004-04-22Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Lincoln, IL at 00:00Z on 2004-04-22The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -9 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
1251 m above ground
0-6 km bulk shear
33 kt
0-1 km storm-relative helicity
-9 m²/s²
0-3 km storm-relative helicity
60 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KPAH 220045
FFWPAH
ILC077-199-220300-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE PADUCAH KY
745 PM CDT WED APR 21 2004

THE NATIONAL WEATHER SERVICE IN PADUCAH HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  NORTHERN JACKSON COUNTY IN SOUTHERN ILLINOIS
  NORTHERN WILLIAMSON COUNTY IN SOUTHERN ILLINOIS

* UNTIL 1000 PM CDT

* AT 736 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A 
  LINE THUNDERSTORMS ACROSS NORTHERN PORTIONS OF JACKSON AND         
  WILLIAMSON COUNTIES...THAT WAS NEARLY STATIONARY. THESE 
  THUNDERSTORMS HAVE BEEN PRODUCING COPIOUS AMOUNTS OF           
  RAIN OVER THE LAST HOUR...WHICH WILL LIKELY CAUSE FLOODING 
  PROBLEMS. ONE TO TWO INCHES OF RAIN IS LIKELY ACROSS THE     
  WARNING AREA...WITH ISOLATED AMOUNTS OF AROUND THREE TO FOUR       
  INCHES.

* LOCATIONS IMPACTED INCLUDE AVA...BUSH...CAMPBELL HILL...COLP...DE
  SOTO...ELKVILLE...FREEMAN SPUR...HURST...PITTSBURG...VERGENNES AND
  WHITEASH

ABSOLUTELY DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER
COVERS THE ROADWAY. VEHICLES CAUGHT IN RISING WATER SHOULD BE
ABANDONED. MOVE TO HIGHER GROUND.

A FLASH FLOOD WARNING MEANS THAT FLOODING IS OCCURRING OR IS
IMMINENT. NEVER ATTEMPT TO CROSS HIGH WATER IN A VEHICLE OR ON FOOT

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODING. ACT QUICKLY IF FLASH FLOODING IS OBSERVED. MOVE
TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT
TO FLOODING WHEN WATER BEGINS RISING.

LAT...LON 3791 8916 3786 8916 3786 8872 3778 8872
          3778 8966 3795 8960

$$

CW
2 follow-up statements
000 
WGUS73 KPAH 220155
FFSPAH
ILC077-199-220300-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PADUCAH KY
855 PM CDT WED APR 21 2004

...THE FLASH FLOOD WARNING FOR NORTHERN WILLIAMSON HAS BEEN 
CANCELLED...

...THE FLASH FLOOD WARNING FOR NORTHERN JACKSON COUNTY IN SOUTHERN 
ILLINOIS REMAINS IN EFFECT UNTIL 1000 PM CDT...

RAIN HAS DIMINISHED ACROSS WILLIAMSON COUNTY. HOWEVER...A BAND OF 
SHOWERS AND THUNDERSTORMS CONTINUES TO SLOWLY DRIFT SOUTH ACROSS 
NORTH CENTRAL JACKSON COUNTY. RECENT RADAR TRENDS SUGGEST THAT THIS
BAND OF SHOWERS AND STORMS IS DECREASING IN BOTH COVERAGE AND 
INTENSITY AS WELL. HOWEVER...SOME HIGH WATER PROBLEMS MAY LINGER
ACROSS NORTHERN SECTIONS OF JACKSON COUNTY...MAINLY IN LOW LYING AND 
POOR DRAINAGE AREAS.

$$
000 
WGUS73 KPAH 220226
FFSPAH
ILC077-220300-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE PADUCAH KY
925 PM CDT WED APR 21 2004

...FLASH FLOOD WARNING CANCELLED FOR NORTHERN JACKSON COUNTY IN 
SOUTHERN ILLINOIS...

SHOWERS AND ISOLATED THUNDERSTORMS CONTINUE TO DECREASE IN BOTH 
COVERAGE AND INTENSITY ACROSS JACKSON COUNTY. THEREFORE THE WARNING 
HAS BEEN CANCELLED. NO ADDITIONAL REPORTS OF HIGH WATER PROBLEMS 
HAVE BEEN RECEIVED.

$$

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 Paducah, KY wrote its last area forecast discussion before this flash flood warning went out at Apr 21, 2:27 PM CDT, 5 hours 18 minutes earlier.

Area forecast discussion, Apr 21, 2:27 PM CDT, 5 hours 18 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE PADUCAH KY
225 PM WED APR 21 2004

.DISCUSSION...

MAIN CONCERN FOR THE FORECAST CONTINUES TO BE POPS AND SEVERE
WEATHER CHANCES THROUGH THE REST OF THE WEEK.

A BAND OF SCATTERED SHOWERS AND THUNDERSTORMS OVER THE SOUTHEAST
THIRD OF THE CWA ASSOCIATED WITH A SHORT WAVE WILL CONTINUE TO MAKE
SLOW PROGRESS TO THE EAST. IN THE MEANTIME...NEARLY STATIONARY COLD
FRONT REMAINS POISED JUST TO THE NORTHWEST OF THE CWA. OVER THE PAST
COUPLE OF HOURS SKIES HAVE CLEARED OVER THE NORTHWEST HALF OF THE
CWA CAUSING THE AIRMASS IN THOSE AREAS TO DESTABILIZE NICELY. LATEST
LAPS DATA SHOWING LIFTED INDICES IN THE -6 TO -10 RANGE AND CAPE
RANGING FROM 500 TO 1800 J/KG. LATEST SAT PIX SHOWING SOME TCU
DEVELOPMENT ALREADY. WILL HAVE TO MONITOR CLOSELY.

FORECAST-WISE...MODELS AGAIN NOT IN THE BEST AGREEMENT. GFS APPEARED
TO AGAIN HAVE A CONVECTIVE FEEDBACK PROBLEM...SO DECIDED TO GO WITH
THE ETA/MESOETA...ESPECIALLY THE MESOETA. MESOETA SAGS THE COLD
FRONT INTO THE NORTHERN SECTIONS OF THE CWA LATE THIS AFTERNOON AND
KEEPS IT THERE. IT THEN DEVELOPS A BAND OF CONVECTION ALONG AND JUST
AHEAD OF THE BOUNDARY. BY MIDNIGHT A STRONG SHORT WAVE WILL BEGIN TO
LIFT ENE ACROSS THE REGION FROM THE SOUTHERN PLAINS. THIS
FEATURE...COMBINED WITH ABUNDANT LOW LEVEL MOISTURE AND THE
STATIONARY BOUNDARY... SHOULD PRODUCE A ROUND OF SHOWERS AND
THUNDERSTORMS BETWEEN MIDNIGHT AND MIDDAY THURSDAY. DONT EXPECT ANY
FLOODING PROBLEMS WITH THIS ROUND...BUT SHOULD WET THINGS DOWN
NICELY. BY LATE THURSDAY AFTERNOON AFTER THIS ROUND OF PRECIP LIFTS
TO THE NORTH...THE MESOETA DEVELOPS A BAND OF RW/TRW ALONG AND JUST
SOUTH OF THE BOUNDARY. THE MESOETA THEN SLOWLY DROPS THE FRONT
SOUTHWARD UNTIL IT CLEARS THE CWA BY LATE FRIDAY AFTERNOON. DURING
THAT 24 HOUR TIME FRAME WITH SEVERAL SHORT WAVES PASSING OVER THE
BOUNDARY COMBINED WITH COPIUS AMOUNTS OF MOISTURE...IT CRANKS OUT
SOME SERIOUS QPF (1 TO 3 INCHES) ACROSS THE CWA. AFTER A VERY BRIEF
RESPITE...SATURDAY NIGHT THE MODELS DEVELOP A WAVE ON THE FRONT IN
RESPONSE TO A SHORT WAVE LIFTING NE OUT OF THE SOUTHERN PLAINS.
MODELS LIFT THE BULK OF THE ENERGY/MOISTURE TO THE NORTH AND WEST OF
OUR CWA...BUT WE WILL PROBABLY SEE PRECIP...ESPECIALLY OVER THE
WESTERN SECTIONS. ON SATURDAY NIGHT INTO SUNDAY MORNING THE SFC
LOW...BY THEN NORTH OF THE CWA...WILL PUSH A COLD FRONT ACROSS THE
AREA THUS PRODUCING ANOTHER ROUND OF RW/TRW. IN THE WAKE OF THIS
SYSTEM...HIGH PRESSURE SHOULD KEEP THE AREA DRY THROUGH WEDNESDAY.

FOR TEMPS...SPLIT THE DIFFERENCE BETWEEN MAV AND FWC MOS.

&&

.PAH WATCHES/WARNINGS/ADVISORIES...
IL...NONE.
IN...NONE.
KY...NONE.
MO...NONE.

&&

JAP
Hazardous weather outlook, Apr 21, 5:08 AM CDT, 14 hours 37 minutes before
HAZARDOUS WEATHER OUTLOOK...CORRECTED DAY ONE DESIGNATOR
NATIONAL WEATHER SERVICE PADUCAH KY
508 AM CDT WED APR 21 2004

ILZ075>078-080>094-INZ081-082-085>088-KYZ001>022-MOZ076-086-087-100-
107>112-114-221000-
ALEXANDER IL-BALLARD KY-BOLLINGER MO-BUTLER MO-CALDWELL KY-
CALLOWAY KY-CAPE GIRARDEAU MO-CARLISLE KY-CARTER MO-CHRISTIAN KY-
CRITTENDEN KY-DAVIESS KY-EDWARDS IL-FRANKLIN IL-FULTON KY-
GALLATIN IL-GIBSON IN-GRAVES KY-HAMILTON IL-HARDIN IL-HENDERSON KY-
HICKMAN KY-HOPKINS KY-JACKSON IL-JEFFERSON IL-JOHNSON IL-
LIVINGSTON KY-LYON KY-MARSHALL KY-MASSAC IL-MCCRACKEN KY-MCLEAN KY-
MISSISSIPPI MO-MUHLENBERG KY-NEW MADRID MO-PERRY MO-PERRY IL-PIKE IN-
POPE IL-POSEY IN-PULASKI IL-RIPLEY MO-SALINE IL-SCOTT MO-SPENCER IN-
STODDARD MO-TODD KY-TRIGG KY-UNION KY-UNION IL-VANDERBURGH IN-
WABASH IL-WARRICK IN-WAYNE MO-WAYNE IL-WEBSTER KY-WHITE IL-
WILLIAMSON IL-
INCLUDING THE CITIES OF...ADVANCE...ALBION...ANNA...BARDWELL...
BENTON...BERNIE...BLOOMFIELD...BOONVILLE...BRECKINRIDGE CENTER...
CADIZ...CAIRO...CALHOUN...CALVERT CITY...CAPE GIRARDEAU...
CARBONDALE...CARMI...CARTERVILLE...CENTRAL CITY...CHAFFEE...
CHANDLER...CHARLESTON...CHRISTOPHER...CLINTON...DAWSON SPRINGS...
DEXTER...DONIPHAN...DU QUOIN...EAST PRAIRIE...EDDYVILLE...ELDORADO...
ELKTON...EVANSVILLE...FAIRFIELD...FORT BRANCH...
FORT CAMPBELL NORTH...FULTON...GREENVILLE...HARRISBURG...HENDERSON...
HERRIN...HICKMAN...HOPKINSVILLE...JACKSON...JOHNSTON CITY...
JONESBORO...LA CENTER...LILBOURN...LONE OAK...MADISONVILLE...
MARBLE HILL...MARION...MAYFIELD...MCLEANSBORO...MELODY HILL...
METROPOLIS...MINER...MORGANFIELD...MOUNT CARMEL...MOUNT VERNON...
MURPHYSBORO...MURRAY...NEW MADRID...NEWBURGH...OAK GROVE...
OAKLAND CITY...ORAN...OWENSBORO...PADUCAH...PERRYVILLE...
PETERSBURG...PIEDMONT...PINCKNEYVILLE...POPLAR BLUFF...
PORTAGEVILLE...PRINCETON...PROVIDENCE...REIDLAND...ROCKPORT...
SCOTT CITY...SHAWNEETOWN...SIKESTON...STURGIS...VIENNA...
WEST FRANKFORT AND WICKLIFFE
508 AM CDT WED APR 21 2004

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST MISSOURI...SOUTHERN
ILLINOIS...SOUTHWEST INDIANA...AND WESTERN KENTUCKY.

.DAY ONE...TODAY AND TONIGHT

THERE IS A SLIGHT CHANCE OF A FEW SEVERE THUNDERSTORMS ALONG AND
NORTH OF A LINE FROM PERRYVILLE MISSOURI TO EVANSVILLE INDIANA AFTER
5 PM THIS AFTERNOON.  ANY SEVERE THUNDERSTORMS WILL BE SHORT-LIVED
AND PRODUCE LARGE HAIL.  THE THREAT FOR SEVERE WEATHER WILL END BY 9
PM.

AN AREA OF SCATTERED SHOWERS AND A FEW THUNDERSTORMS ACROSS THE QUAD
STATE THIS MORNING WILL PUSH EAST OF THE AREA EARLY THIS AFTERNOON.
WITH PLENTIFUL CLOUD COVER AND PRECIPITATION IN THE
REGION...INSTABILITY WILL BE LIMITED...SO SEVERE WEATHER IS NOT
ANTICIPATED.

ANOTHER AREA OF SHOWERS AND THUNDERSTORMS WILL SPREAD NORTHWARD
ACROSS THE ENTIRE QUAD STATE AFTER MIDNIGHT TONIGHT.  SEVERE WEATHER
IS NOT EXPECTED...BUT SOME LOCATIONS MAY RECEIVE OVER AN INCH OF
RAINFALL.

MINOR FLOODING IS OCCURRING AT A FEW POINTS ALONG THE OHIO RIVER.
PLEASE REFER TO THE LATEST FLOOD STATEMENT FOR MORE DETAILS.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

AN AREA OF SHOWERS AND THUNDERSTORMS WILL PUSH OUT OF THE QUAD STATE
BY EARLY THURSDAY AFTERNOON.  A FEW OF THE STORMS MAY BE STRONG AND
PRODUCE LOCALLY HEAVY RAINFALL...BUT SEVERE WEATHER IS NOT EXPECTED
WITH THIS EVENT.

THE CHANCE OF THUNDERSTORMS WILL CONTINUE FROM THURSDAY NIGHT THROUGH
SUNDAY.  AT THIS TIME...SEVERE WEATHER IS NOT EXPECTED DURING THIS
PERIOD.

MINOR FLOODING IS FORECAST TO CONTINUE AT A FEW POINTS ALONG THE OHIO
RIVER INTO THE WEEKEND. SEE THE LATEST FLOOD STATEMENT FOR MORE
DETAILS.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE REQUIRED AFTER 5 PM THIS AFTERNOON ALONG
AND NORTH OF A LINE FROM PERRYVILLE MISSOURI TO EVANSVILLE INDIANA.

DRS

In the hours before

Special weather statement, Apr 21, 6:12 PM CDT, 1 hour 33 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PADUCAH KY
612 PM CDT WED APR 21 2004

ILZ081-082-084>086-088>090-212345-
FRANKLIN IL-HAMILTON IL-JACKSON IL-JOHNSON IL-POPE IL-SALINE IL-
UNION IL-WILLIAMSON IL-
612 PM CDT WED APR 21 2004

...STRONG THUNDERSTORM JUST NORTHEAST OF MARION ILLINOIS...

AT 610 PM CDT...DOPPLER RADAR DETECTED A STRONG THUNDERSTORM BETWEEN
JOHNSON CITY AND PITTSBURG...OR 6 MILES NORTHEAST OF MARION...
MOVING EAST AT 10 MPH.

THROUGH 645 PM...THIS STORM MAY PRODUCE PEA TO SMALL MARBLE
SIZE HAIL...AND GUSTY WINDS UP TO 40 MPH. THIS STORM WILL
CONTINUE TO AFFECT AREAS AROUND...AND JUST WEST OF CORINTH.

NOLES
Special weather statement, Apr 21, 6:32 PM CDT, 1 hour 13 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PADUCAH KY
632 PM CDT WED APR 21 2004

ILZ081-082-084>086-088>090-220000-
FRANKLIN IL-HAMILTON IL-JACKSON IL-JOHNSON IL-POPE IL-SALINE IL-
UNION IL-WILLIAMSON IL-
632 PM CDT WED APR 21 2004

...STRONG THUNDERSTORM JUST NORTHEAST OF MARION ILLINOIS...

AT 630 PM CDT...DOPPLER RADAR CONTINUED TO DETECT A STRONG
THUNDERSTORM BETWEEN JOHNSON CITY AND PITTSBURG...OR 7 MILES
NORTHEAST OF MARION...MOVING EAST AT 10 MPH. THIS STORM HAS PRODUCED
UP TO 1/2 INCH DIAMETER HAIL IN THE VICINITY OF PITTSBURG. THIS
STORM WILL PRODUCE VERY HEAVY RAIN AS WELL OVER NORTH CENTRAL
WILLIAMSON COUNTY.

THROUGH 700 PM...THIS STORM WILL CONTINUE TO PRODUCE PEA TO SMALL
MARBLE SIZE HAIL...AND GUSTY WINDS UP TO 40 MPH. THIS STORM WILL
AFFECT AREAS AROUND...AND JUST WEST OF CORINTH...AS WELL AS THE
PITTSBURG AREA.

NOLES
Special weather statement, Apr 21, 6:32 PM CDT, 1 hour 13 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PADUCAH KY
632 PM CDT WED APR 21 2004

ILZ081-082-084>086-088>090-220000-
FRANKLIN IL-HAMILTON IL-JACKSON IL-JOHNSON IL-POPE IL-SALINE IL-
UNION IL-WILLIAMSON IL-
632 PM CDT WED APR 21 2004

...STRONG THUNDERSTORM JUST NORTHEAST OF MARION ILLINOIS...

AT 630 PM CDT...DOPPLER RADAR CONTINUED TO DETECT A STRONG
THUNDERSTORM BETWEEN JOHNSTON CITY AND PITTSBURG...OR 7 MILES
NORTHEAST OF MARION...MOVING EAST AT 10 MPH. THIS STORM HAS PRODUCED
UP TO 1/2 INCH DIAMETER HAIL IN THE VICINITY OF PITTSBURG. THIS
STORM WILL PRODUCE VERY HEAVY RAIN AS WELL OVER NORTH CENTRAL
WILLIAMSON COUNTY.

THROUGH 700 PM...THIS STORM WILL CONTINUE TO PRODUCE PEA TO SMALL
MARBLE SIZE HAIL...AND GUSTY WINDS UP TO 40 MPH. THIS STORM WILL
AFFECT AREAS AROUND...AND JUST WEST OF CORINTH...AS WELL AS THE
PITTSBURG AREA.

NOLES - COR FOR JOHNSTON CITY
Special weather statement, Apr 21, 6:55 PM CDT, 50 minutes before
SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE PADUCAH KY
655 PM CDT WED APR 21 2004

ILZ075>078-080>089-092-093-MOZ076-086-087-100-107>111-220100-
ALEXANDER IL-BOLLINGER MO-BUTLER MO-CAPE GIRARDEAU MO-CARTER MO-
EDWARDS IL-FRANKLIN IL-GALLATIN IL-HAMILTON IL-JACKSON IL-
JEFFERSON IL-JOHNSON IL-PERRY IL-PERRY MO-PULASKI IL-RIPLEY MO-
SALINE IL-SCOTT MO-STODDARD MO-UNION IL-WABASH IL-WAYNE IL-WAYNE MO-
WHITE IL-WILLIAMSON IL-
655 PM CDT WED APR 21 2004

...SCATTERED STRONG THUNDERSTORMS ACROSS SOUTHEAST MISSOURI AND
SOUTHERN ILLINOIS...

EARLY THIS EVENING...THUNDERSTORMS WERE SCATTERED ALONG A LINE...
FROM CARMI...TO JUST NORTH OF BOTH MARION AND MURPHYSBORO IN
SOUTHERN ILLINOIS. SCATTERED THUNDERSTORMS WERE FROM NEAR PERRYVILLE
TO VAN BUREN IN SOUTHEAST MISSOURI AS WELL.

THE STRONGEST STORMS ACROSS SOUTHERN ILLINOIS...GENERALLY FROM THE
DE SOTO AREA...TO JOHNSTON CITY...EAST TO NEAR CARMI...WILL LIKELY
PRODUCE TORRENTIAL RAINFALL...PEA TO SMALL MARBLE SIZE HAIL...AND
PERHAPS GUSTY WINDS TO 40 MPH...THROUGH 800 PM.

THE STORMS OVER NORTHERN CARTER COUNTY...IN SOUTH CENTRAL MISSOURI
WILL LIKELY RESULT IN HEAVY RAINFALL AS WELL.

THE STORMS CONTINUE TO MOVE SLOWLY...GENERALLY EAST ABOUT 10 MPH.

NOLES

Nearby

Flash Flood Warnings in Illinois, 2004Every flash flood warning in 2004

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.