Alert archive / Illinois / Flash Flood Warnings in 2014

Flash Flood Warning 19, NWS Quad Cities, IA

June 30, 2014Carroll County, Whiteside County, Illinois

NWS Quad Cities, IA issued this flash flood warning at Jun 30, 2014, 8:08 PM CDT for Carroll County, Whiteside County, Illinois. It was in force for 6 hr. 3 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: Jun 30, 2014, 8:08 PM CDT (01:08 UTC)
Expired: Jul 1, 2014, 2:00 AM CDT
In force: 6 hr
Issued by: NWS Quad Cities, IA
Area: Storm-based polygon
Flood severity: None

Counties Carroll County, IL, Whiteside County, IL

The radar

The Quad Cities radar (KDVN), 53 km from the middle of the area, began a volume at 01:09 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
Jun 30, 9:00 PM CDT	FLASH FLOOD	Rock Falls, IL	STREET FLOODING UP TO CAR DOORS.
Jun 30, 9:26 PM CDT	HEAVY RAIN 2.6	1 Wnw Morrison, IL	24 HOUR TOTAL.
Jun 30, 10:40 PM CDT	HEAVY RAIN 2.97	Thomson, IL	RAIN TOTAL TODAY.

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 one storm report to this flash flood warning; the first came 52 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, 1.1 hours before the alert went out and 47 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: 157 J/kg
Mixed-layer CIN: -178 J/kg
Mixed-layer LCL: 1059 m above ground
0-6 km bulk shear: 63 kt
0-1 km storm-relative helicity: 268 m²/s²
0-3 km storm-relative helicity: 552 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 5.3

Open this sounding in Storm Lab

The text

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

586 
WGUS53 KDVN 010108
FFWDVN
ILC015-195-010700-
/O.NEW.KDVN.FF.W.0019.140701T0108Z-140701T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
808 PM CDT MON JUN 30 2014

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  CARROLL COUNTY IN NORTHWEST ILLINOIS...
  THIS INCLUDES THE CITY OF MOUNT CARROLL...
  WHITESIDE COUNTY IN NORTHWEST ILLINOIS...
  THIS INCLUDES THE CITIES OF...STERLING...ROCK FALLS...MORRISON...

* UNTIL 200 AM CDT

* AT 804 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAIN FROM THUNDERSTORMS OVER THE WARNED AREA.
  RAINFALL OF 1 TO 2 INCHES IN AN HOUR OR LESS IS LIKELY FROM
  THESE STORMS.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO GARDEN
  PLAIN...FULTON...SAVANNA...MILLEDGEVILLE...AND LANARK.

PRECAUTIONARY/PREPAREDNESS ACTIONS...

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

&&

LAT...LON 4158 8964 4159 9019 4160 9016 4164 9016
      4168 9023 4178 9024 4181 9018 4190 9015
      4196 9017 4201 9014 4204 9016 4212 9016
      4219 9031 4220 9030 4220 8969 4193 8969
      4193 8963

$$

08

1 follow-up statement

467 
WGUS73 KDVN 010427
FFSDVN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1127 PM CDT MON JUN 30 2014

ILC015-195-010438-
/O.CAN.KDVN.FF.W.0019.000000T0000Z-140701T0700Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
WHITESIDE IL-CARROLL IL-
1127 PM CDT MON JUN 30 2014

...THE FLASH FLOOD WARNING HAS BEEN CANCELLED FOR CARROLL AND
WHITESIDE COUNTIES...

CALLS TO LOCAL SHERIFF DEPARTMENTS INDICATE NO RECENT REPORTS OF 
WATER ON AREA ROADS.

LAT...LON 4158 8964 4159 9019 4160 9016 4164 9016
      4168 9023 4178 9024 4181 9018 4190 9015
      4196 9017 4201 9014 4204 9016 4212 9016
      4219 9031 4220 9030 4220 8969 4193 8969
      4193 8963

$$

08

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 Jun 30, 6:38 PM CDT, 1 hour 30 minutes earlier.

Area forecast discussion, Jun 30, 6:38 PM CDT, 1 hour 30 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
638 PM CDT MON JUN 30 2014

.SHORT TERM...(THIS EVENING THROUGH TUESDAY)
ISSUED AT 320 PM CDT MON JUN 30 2014

SIGNIFICANT BOWING SVR MCS ONGOING ACRS THE CWA. TORNADO AND FLASH
FLOOD WATCHES CONTINUE INTO THE EVENING. SEVERAL OF THE NEW HIRES
MODEL RUNS SUGGEST THAT MOST OF THE SVR CONVECTION MAY BLOW
THROUGH THE CWA AND BE OFF TO THE EAST AND SOUTHEAST OF THE DVN
CWA BY 02Z THIS EVENING. BUT WILL HAVE TO WATCH FOR TRAINING
BEHIND THE MAIN ONGOING LINE AS FORCING AND LLVL JET FEED AHEAD OF
APPROACHING UPPER TROF CONTINUES TO INTERACT AND RIDE UP OVER
LINGERING COLD POOL OR OUTFLOW BOUNDARY THROUGH MID EVENING. THIS
OF COURSE WILL ENHANCE FLASH FLOODING AND RIVER/STREAM FLOODING
WHERE LINGERING CONVECTION OCCURS. CLEAR OUT TOTALLY AFTER
MIDNIGHT HOPEFULLY...BUT WATER ISSUES WILL LINGER INTO EARLY TUE
MORNING. AFTER A QUIET MORNING ON TUE...SCTRD SHOWERS UNDER UPPER
TROF SHEARING ACRS THE MID AND UPPER MS RVR VALLEY DURING THE AFTERNOON.
HIGHS IN THE 70S TO LOW 80S...THE 70S MORE PREVALENT IN THE NORTH WHERE
CLOUD COVER INCREASES EARLIER IN THE DAY.

.LONG TERM...(TUESDAY NIGHT THROUGH MONDAY)
ISSUED AT 320 PM CDT MON JUN 30 2014

BRIEF OVERVIEW...WELL BELOW NORMAL CONDITIONS/TEMPS FOR THE MID
WEEK STILL APPEAR TO BE ON TAP. ANOTHER CHANCE FOR INSTABILITY
SHOWERS AND PLENTY OF CLOUD COVER ON WED UNDER COOL CORE UPPER
TROF. CLEAR OUT FOR THU INTO FRI AS BOTH SFC AND UPPER RIDGING
SHIFT ACRS THE REGION. IT STILL APPEARS IDEAL 4TH OF JULY
CONDITIONS FOR FRI. WILL HAVE TO WATCH FOR ELEVATED WARM AIR
ADVECTION WING/RETURN FLOW SHOWERS AND POSSIBLE STORMS LATE FRI
NIGHT WEST OF THE MS RVR. NORTHWEST FLOW MAY DUMP VORTS/UPPER
WAVES ACRS PORTIONS OF THE REGION FROM SAT INTO MON FOR A
POTENTIALLY MORE UNSETTLED PERIOD AGAIN. STILL SUB-NORMAL TEMPS FOR
SAT AND SUNDAY...BUT WARMING TO NORMAL BY MONDAY. OMINOUS SHELF
CLOUD NOW OUT THE WINDOW LOOKING WEST OF THE OFFICE...TIME TO SEND
THIS DISCUSSION.     ..12..

&&

.AVIATION...(FOR THE 00Z TAFS THROUGH 00Z TUESDAY EVENING)
ISSUED AT 634 PM CDT MON JUN 30 2014

LINGERING SCATTERED THUNDERSTORMS...MAY IMPACT THE TERMINALS THROUGH
01/04Z AS A COOL FRONT PASSES WITH IFR/MVFR CONDITIONS IN LOW VISIBILITY
IN HEAVY RAIN. SKIES TO PARTIALLY CLEAR TO CLEAR THROUGH EARLY MORNING
AS COOL FRONT PASSES WITH WEST WINDS OF 5 TO 10 KTS. AFTER 01/14Z...SKIES
TO BECOME PARTLY TO MOSTLY CLOUDY WITH SCT-BKN-OVC COVERAGE OF CIGS
3-4K AGL AND GUSTY WESTERLY TO NORTHWESTERLY WINDS OF 10 TO 20 KTS.

&&

.HYDROLOGY...
ISSUED AT 320 PM CDT MON JUN 30 2014

MANY RIVER FLOOD WARNINGS UPGRADED AN EXPANDED EARLIER TODAY. SOME
CRESTS MAY APPROACH OR GET INTO THE TOP 5 RECORD CRESTS EVER
RECORDED FOR SEVERAL TRIBUTARY RIVER FORECAST SITES...DEPENDING ON
IF THE BASINS GET 1 TO 3+ INCHES OF ADDITIONAL RAINFALL THIS
EVENING. MAJOR FLOODING EXPANDED ON THE MAIN STEM MISSISSIPPI RIVER.

AS THE PREVIOUS SHIFT STATED...THIS IS A HIGH IMPACT SITUATION!
SEE THE LATEST RIVER FLOOD WARNINGS AND FLOOD STATEMENTS FOR FULL
DETAILS.

&&

.DVN WATCHES/WARNINGS/ADVISORIES...
IA...FLASH FLOOD WATCH UNTIL 1 AM CDT TUESDAY FOR BENTON-BUCHANAN-
     CEDAR-CLINTON-DELAWARE-DES MOINES-DUBUQUE-HENRY IA-IOWA-
     JACKSON-JEFFERSON-JOHNSON-JONES-KEOKUK-LEE-LINN-LOUISA-
     MUSCATINE-SCOTT-VAN BUREN-WASHINGTON.

IL...FLASH FLOOD WATCH UNTIL 1 AM CDT TUESDAY FOR BUREAU-CARROLL-
     HANCOCK-HENDERSON-HENRY IL-JO DAVIESS-MCDONOUGH-MERCER-
     PUTNAM-ROCK ISLAND-STEPHENSON-WARREN-WHITESIDE.

MO...FLASH FLOOD WATCH UNTIL 1 AM CDT TUESDAY FOR CLARK-SCOTLAND.

&&

SHORT TERM...12
LONG TERM...12
AVIATION...NICHOLS
HYDROLOGY...12

Hazardous weather outlook, Jun 30, 3:58 AM CDT, 16 hours 10 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
358 AM CDT MON JUN 30 2014

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-010900-
BUCHANAN-DELAWARE-DUBUQUE-BENTON-LINN-JONES-JACKSON-IOWA-JOHNSON-
CEDAR-CLINTON-MUSCATINE-SCOTT-KEOKUK-WASHINGTON-LOUISA-JEFFERSON-
HENRY IA-DES MOINES-VAN BUREN-LEE-JO DAVIESS-STEPHENSON-CARROLL-
WHITESIDE-ROCK ISLAND-HENRY IL-BUREAU-PUTNAM-MERCER-HENDERSON-
WARREN-HANCOCK-MCDONOUGH-SCOTLAND-CLARK-
358 AM CDT MON JUN 30 2014

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

THE COMBINATION OF LIFE THREATENING FLASH FLOODING AND SIGNIFICANT
SEVERE WEATHER WILL MAKE TODAY AND THIS EVENING A VERY IMPORTANT
DAY TO BE A STORM SPOTTER. AFTER THE EXCEPTIONALLY HEAVY RAINS
THIS PAST NIGHT...ANOTHER ROUND OF WIDESPREAD TORRENTIAL RAINFALL
AND SEVERE WEATHER IS EXPECTED TODAY OVER THE OUTLOOK AREA. THE
THREAT FOR FLASH FLOODING...WILL BE HIGHEST IN SATURATED
AREAS...GENERALLY NORTH OF HIGHWAY 34 IN IOWA...AND NORTH OF
GALESBURG IN ILLINOIS. TORRENTIAL RAINFALL OVER 2 INCHES IN ONE
HOUR ARE POSSIBLE AGAIN TODAY...RESULTING IN A SIGNIFICANT THREAT
FOR FLASH FLOODING. IN ADDITION...RIVER FLOODING WILL INCREASE
SIGNIFICANTLY DUE TO THIS VERY HEAVY RAIN.

THE STORM PREDICTION CENTER IS FORECASTING A MODERATE RISK FOR
SEVERE STORMS OVER THE ENTIRE OUTLOOK AREA TODAY AND TONIGHT.
SUPERCELL THUNDERSTORMS WILL FORM IN CENTRAL IOWA TODAY...AND MOVE
EAST...AS THEY FORM INTO ANOTHER LARGE BOWING LINE THIS AFTERNOON. THE
THREAT FOR LARGE HAIL...DAMAGING WINDS AND TORNADOES IS WIDESPREAD
TODAY AND EARLY THIS EVENING AS STORMS MOVE EAST.

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

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

THE PROBABILITY FOR WIDESPREAD HAZARDOUS WEATHER IS LOW.

.SPOTTER INFORMATION STATEMENT...

SPOTTER REPORTS OF HEAVY RAIN...FLASH FLOODING...STORM
DAMAGE...AND SEVERE WEATHER ARE NEEDED TODAY THROUGH THIS EVENING.
SPOTTER ACTIVATION WILL BE NEEDED TODAY AND TONIGHT.

A CONFERENCE CALL FOR EMERGENCY MANAGEMENT COORDINATORS WILL BE CONDUCTED
LATER THIS MORNING OR EARLY THIS AFTERNOON.

ERVIN

In the hours before

Local storm report, Jun 30, 7:04 PM CDT, 1 hour 4 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
704 PM CDT MON JUN 30 2014

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

0255 PM     TSTM WND DMG     1 E WHITTIER            42.10N 91.45W
06/30/2014                   LINN               IA   TRAINED SPOTTER

            TREES UPROOTED AND OUTBUILDINGS DOWN.

&&

Local storm report, Jun 30, 7:09 PM CDT, 59 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
709 PM CDT MON JUN 30 2014

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

0705 PM     TSTM WND GST     OLIN                    42.00N 91.14W
06/30/2014  E50 MPH          JONES              IA   TRAINED SPOTTER

            ESTIMATED 45 TO 50 MPH...NO DISCERNABLE DAMAGE.

&&

BILLN

Special weather statement, Jun 30, 7:27 PM CDT, 41 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
727 PM CDT MON JUN 30 2014

IAZ042-053-054-065>068-ILZ001-002-007-009-015-016-010130-
CARROLL-CEDAR-CLINTON-DUBUQUE-HENRY-JACKSON-JO
DAVIESS-JONES-MUSCATINE-ROCK ISLAND-SCOTT-STEPHENSON-WHITESIDE-
727 PM CDT MON JUN 30 2014

...LINE OF STORMS WITH STRONG WINDS AND VERY HEAVY RAIN...

AT 722 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM GALENA TO
ROCHESTER...MOVING EAST AT 45 MPH.

* THUNDERSTORMS WILL BE NEAR...
  BENNETT...WHEATLAND...SPRINGBROOK AND BELLEVUE AROUND 730 PM CDT...
  SCHAPVILLE...DURANT...HANOVER AND ELIZABETH AROUND 735 PM CDT...
  WOODBINE AND WELTON AROUND 740 PM CDT...

STRONG GUSTY WINDS OF 40 TO 55 MPH ARE POSSIBLE WITH THIS LINE OF
STORMS. IN ADDITION...EXPECT VERY HEAVY RAIN OF POSSIBLY UP TO
AN INCH IN LESS THAN AN HOUR WITH PONDING WATER ON STREETS AND
ROADS.

SEEK SHELTER IN A STURDY STRUCTURE UNTIL THIS STORM HAS PASSED.

LAT...LON 4250 8962 4157 9009 4160 9129 4251 9059
TIME...MOT...LOC 0024Z 271DEG 41KT 4237 9036 4169 9111

Local storm report, Jun 30, 7:45 PM CDT, 23 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
745 PM CDT MON JUN 30 2014

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

0744 PM     TSTM WND GST     1 ENE MUSCATINE         41.42N 91.05W
06/30/2014  E50 MPH          MUSCATINE          IA   TRAINED SPOTTER

            ESTIMATED 45 TO 50 MPH.

&&

BILLN

Special weather statement, Jun 30, 7:49 PM CDT, 19 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
749 PM CDT MON JUN 30 2014

IAZ054-066-010145-
JACKSON IA-CLINTON IA-
749 PM CDT MON JUN 30 2014

...THUNDERSTORMS WITH HEAVY RAIN...

AT 745 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR HAD
THUNDERSTORMS WITH HEAVY RAIN...MOVING ACROSS JACKSON AND CLINTON
COUNTIES.

WINDS UP TO 40 MPH AND RAINFALL OF UP TO 1.5 INCHES WILL BE POSSIBLE
THROUGH 845 PM.

&&

LAT...LON 4232 9041 4228 9043 4223 9040 4216 9022
      4212 9016 4199 9014 4181 9018 4173 9032
      4173 9036 4174 9043 4178 9047 4176 9068
      4174 9072 4177 9079 4177 9090 4229 9090
      4229 9067 4238 9066 4238 9048

08

Special weather statement, Jun 30, 8:02 PM CDT, 6 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
802 PM CDT MON JUN 30 2014

IAZ065-067-068-078-088-089-ILZ015>017-024>026-010200-
BUREAU-CEDAR-DES MOINES-HENDERSON-HENRY-LOUISA-MERCER-MUSCATINE-ROCK
ISLAND-SCOTT-WARREN-
802 PM CDT MON JUN 30 2014

...LINE OF STORMS WITH STRONG WINDS AND HEAVY RAIN...

AT 759 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM RIVERDALE TO
WAPELLO...MOVING SOUTHEAST AT 40 MPH.

* THUNDERSTORMS WILL BE NEAR...
  HAMPTON...NEW BOSTON...HAMLET AND TAYLOR RIDGE AROUND 805 PM CDT...
  COLONA...CLEVELAND...REYNOLDS AND MILLERSBURG AROUND 810 PM CDT...
  OSBORN AND WARNER AROUND 815 PM CDT...

WINDS UP TO 55 MPH...AND VERY HEAVY RAINFALL WITH AMOUNTS UP TO
THREE QUARTERS OF AN INCH IN LESS THAN AN HOUR CAN BE EXPECTED WITH
THIS LINE OF STORMS.

LAT...LON 4114 9007 4114 9043 4073 9044 4069 9047
      4116 9147 4161 9095 4155 8971
TIME...MOT...LOC 0100Z 300DEG 36KT 4153 9047 4113 9116

KINNEY

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 30, 7:27 PM CDT	Special Weather Statement	DVN	Carroll, Jo Daviess	63 min
Jun 30, 8:02 PM CDT	Special Weather Statement	DVN	Henry, Mercer, Rock Island, Warren	58 min
Jun 30, 8:25 PM CDT	Flash Flood Warning	DVN	Stephenson	6 hr
Jun 30, 8:29 PM CDT	Flash Flood Warning	DVN	Bureau, Putnam	6 hr
Jun 30, 8:36 PM CDT	Special Weather Statement	DVN	Bureau, Henderson, Henry, Putnam, Warren	54 min
Jun 30, 8:44 PM CDT	Special Weather Statement	DVN	Mercer, Warren	61 min
Jun 30, 9:03 PM CDT	Special Weather Statement	DVN	Hancock, McDonough	57 min
Jun 30, 9:32 PM CDT	Severe Thunderstorm Warning	DVN	McDonough	32 min
Jun 30, 9:43 PM CDT	Severe Thunderstorm Warning	DVN	Hancock	47 min
Jun 30, 10:01 PM CDT	Severe Thunderstorm Warning	DVN	McDonough	44 min
Jun 30, 10:32 PM CDT	Areal Flood Warning	DVN	Rock Island	12 hr

Nearby

Flash Flood Warnings in Illinois, 2014 Every flash flood 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; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.