Alert archive / Iowa / Flash Flood Warnings in 2007

Flash Flood Warning 39, NWS Quad Cities, IA

July 18, 2007Dubuque County, Iowa

NWS Quad Cities, IA issued this flash flood warning at Jul 18, 2007, 1:11 AM CDT for Dubuque County, Iowa. It was in force for 6 hr. 12 reports came from inside the area while it was in force.

The area

The counties it named, with what was reported inside it.

The facts

Issued: Jul 18, 2007, 1:11 AM CDT (06:11 UTC)
Expired: Jul 18, 2007, 7:00 AM CDT
In force: 6 hr
Issued by: NWS Quad Cities, IA
Area: Whole counties

County Dubuque County, IA

The radar

The Quad Cities radar (KDVN), 99 km from the middle of the area, began a volume at 06:12 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
Jul 18, 1:21 AM CDT	FLASH FLOOD	Dubuque, IA	WATER OVER RUPP HOLLOW ROAD
Jul 18, 1:28 AM CDT	FLASH FLOOD	N Dubuque, IA	SHERIFFS OFFICE REPORTS STREETS FLOODED DOWNTOWN ON WEST LOCUST AND 22ND STREETS. MANHOLE COVERS POPPED OFF BY WATER.
Jul 18, 1:30 AM CDT	FLASH FLOOD	Dubuque, IA	FLOODING ON 17TH AND LOCUST STREETS
Jul 18, 1:36 AM CDT	FLASH FLOOD	Dubuque, IA	SEVERE STREET FLOODING IN DOWNTOWN AREAS, ALL ALONG LOCUST. HIGHWAY 52 ON NORTH SIDE OF TOWN ALSO FLOODED.
Jul 18, 1:43 AM CDT	FLASH FLOOD	Dubuque, IA	WASHOUT WITH WATER AND ROCKS OVER 52ND ST AND CLAYHILL RD
Jul 18, 1:52 AM CDT	FLASH FLOOD	1 Ene Dubuque, IA	22ND STREET COMPLETELY CLOSED AND BLOCKED OFF. STREETS COVERED WITH WATER FROM CURB TO CURB. INTERSECTION OF 22ND AND WHITE STREET CLOSED.
Jul 18, 4:36 AM CDT	HEAVY RAIN 4	10 Nnw Dubuque, IA	CALLER ESTIMATED 4 INCHES OR MORE RAINFALL SO FAR.
Jul 18, 5:07 AM CDT	HEAVY RAIN 4.6	Dubuque, IA	RAIN FALL TOTAL SINCE 1130 PM.
Jul 18, 5:15 AM CDT	FLASH FLOOD	Dubuque, IA	LAW ENFORCEMENT REPORTS MAJOR FLOODING ALONG US HIGHWAY 52, AND MANY ROADS ARE CLOSED ALONG AND NORTH OF HIGHWAY 20 DUE TO RAPIDLY RISING WATER.
Jul 18, 5:15 AM CDT	HEAVY RAIN 6	Dubuque, IA	LAW ENFORCEMENT RELAYED SEVERAL REPORTS OF RAINFALL TOTAL IN THE AREA RANGING FROM 3 TO 6 INCHES SINCE LAST EVENING.
Jul 18, 7:00 AM CDT	HEAVY RAIN 2.94	Dubuque, IA	TOTAL DURING THE PAST 6 HOURS. 24 HOUR TOTAL 3.77 INCHES.
Jul 18, 7:03 AM CDT	HEAVY RAIN 4.07	Dubuque, IA	24 HOUR TOTAL.

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

The nearest sounding before it

Davenport, (KDVN), launched 00:00Z, 6.2 hours before the alert went out and 100 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: 78 J/kg
Mixed-layer CIN: -337 J/kg
Mixed-layer LCL: 1823 m above ground
0-6 km bulk shear: 46 kt
0-1 km storm-relative helicity: 236 m²/s²
0-3 km storm-relative helicity: 388 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KDVN 180611
FFWDVN
IAC061-181200-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
111 AM CDT WED JUL 18 2007

THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  DUBUQUE COUNTY IN NORTHEAST IOWA...
  THIS INCLUDES THE CITY OF DUBUQUE...

* UNTIL 700 AM CDT

* AT 103 AM CDT...LOCAL LAW ENFORCEMENT OFFICIALS REPORTED VERY HEAVY
  RAIN FROM THUNDERSTORMS OVER THE WARNED AREA.

* LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SHERRILL...
  SAGEVILLE...RICKARDSVILLE...LUXEMBURG...HOLY CROSS...DURANGO...
  BANKSTON...BALLTOWN AND ASBURY

STORMS TONIGHT HAVE ALREADY BROUNGHT RAINFALL AMOUNTS OF 1.5 TO 2 
INCHES...ON TOP OF AROUND 1.5 INCHES OF RAINFALL THAT FELL OVERNIGHT 
LAST NIGHT. ADDITIONAL RAINFALL OF UP TO 2 INCHES IS EXPECTED.  THE 
GREATEST THREAT IS OVER THE EASTERN PORTIONS OF THE COUNTY...OVER 
WHICH SEVERAL THUNDERSTORMS HAVE MOVED IN THE LAST COUPLE HOURS.

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

FLASH FLOODING IS LIKELY ON THE MIDDLE AND NORTH FORKS OF THE LITTLE 
MAQUOKETA RIVER.

LAT...LON 4238 9065 4230 9068 4233 9083 4264 9113
      4264 9088 4267 9086 4267 9084 4264 9070
      4257 9068 4255 9064 4247 9065 4239 9053

$$

LRE

3 follow-up statements

000 
WGUS73 KDVN 180643
FFSDVN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
140 AM CDT WED JUL 18 2007

IAC061-181200-
DUBUQUE IA-
140 AM CDT WED JUL 18 2007

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 700 AM CDT FOR
DUBUQUE COUNTY...

AT 137 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO 
INDICATE THUNDERSTORMS PRODUCING VERY HEAVY RAIN OVER THE WARNED 
AREA. A FEW INDIVIDUAL STORMS HAVE MOVED OVER THE SAME AREAS IN THE 
LAST THREE HOURS.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SHERRILL...
SAGEVILLE...RICKARDSVILLE...LUXEMBURG...HOLY CROSS...DURANGO AND 
BALLTOWN.

THE COUNTY SHERRIFF INDICATED THERE WAS SEVERE STREET FLOODING IN 
DOWNTOWN DUBUQUE...ESPECIALLY ALONG LOCUST AND HIGHWAY 52 ON THE 
NORTH SIDE OF TOWN.

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

FLASH FLOODING IS LIKELY ON THE MIDDLE AND NORTH FORKS OF THE LITTLE 
MAQUOKETA RIVER.

FLOODING OF SMALL STREAMS AND CREEKS...STREETS...UNDERPASSES AND LOW
LYING URBAN AREAS IS LIKELY.

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 400 AM CDT
WEDNESDAY MORNING FOR NORTHEASTERN IOWA.

LAT...LON 4238 9065 4230 9068 4233 9083 4264 9113
      4264 9088 4267 9086 4267 9084 4264 9070
      4257 9068 4255 9064 4247 9065 4239 9053

$$
LRE

000 
WGUS73 KDVN 180921
FFSDVN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
417 AM CDT WED JUL 18 2007

IAC061-181200-
DUBUQUE IA-
417 AM CDT WED JUL 18 2007

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 700 AM CDT FOR
DUBUQUE COUNTY...

AT 413 AM CDT...A THUNDERSTORM PRODUCING VERY HEAVY RAIN WAS REPORTED
OVER THE WARNED AREA.  ADDITIONAL THUNDERSTORMS WILL CONTINUE TO 
MOVE ACROSS THE REGION PRODUCING ANOTHER ONE TO LOCALLY TWO INCHES OF
RAINFALL THROUGH 7 AM. THIS IS ON TOP OF THE ONE TO FOUR INCHES THAT 
HAS ALREADY FALLEN.  THIS WILL KEEP WATER LEVELS HIGH AND AGGRAVATE 
CURRENT LOCALIZED FLOODING OCCURRING IN MANY PLACES.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SHERRILL...
SAGEVILLE...RICKARDSVILLE...LUXEMBURG...HOLY CROSS...DURANGO AND
BALLTOWN

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

FLOODING OF SMALL STREAMS AND CREEKS...HIGHWAYS AND STREETS...
UNDERPASSES AND LOW LYING URBAN AND RURAL AREAS IS LIKELY.

LAT...LON 4238 9065 4230 9068 4233 9083 4264 9113
      4264 9088 4267 9086 4267 9084 4264 9070
      4257 9068 4255 9064 4247 9065 4239 9053

$$

NICHOLS

000 
WGUS73 KDVN 181020 CCA
FFSDVN

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
519 AM CDT WED JUL 18 2007

IAC061-181200-
DUBUQUE IA-
519 AM CDT WED JUL 18 2007

...A FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 700 AM CDT FOR
DUBUQUE COUNTY...

...MAJOR FLOODING OCCURRING IN DUBUQUE COUNTY...

AT 505 AM CDT...LOCAL OFFICIALS REPORT MAJOR FLOODING IS UNDERWAY
FOR LOCATIONS ALONG AND NORTH OF US HIGHWAY 52.  MANY ROADS ARE
CLOSED ALONG AND ESPECIALLY NORTH OF HIGHWAY 20 AS WATER IS RAPIDLY
RISING WITH THE MAQUOKETA RIVER WELL OVER ITS BANKS AND WATER RISING 
RAPIDLY.  LOCATIONS AROUND SAGEVILLE...RICKARDSVILLE...HOLLY CROSS 
ARE REPORTING WIDESPREAD FLOODING.  WATER IS REPORTED TO BE 6 INCHES 
OR MORE DEEP ON MANY ROADWAYS WITH NUMEROUS ROADS IMPASSABLE OR 
CLOSED AT THIS TIME. 

REPORTS OF THREE TO SIX INCHES OF RAIN HAVE BEEN RECEIVED OVER THE 
REGION THE PAST SIX HOURS.  MORE THUNDERSTORMS WILL MOVE ACROSS THE 
NEXT TWO HOURS PRODUCING AN ADDITIONAL ONE TO TWO INCHES.  THIS WILL 
KEEP WATER LEVELS HIGH AND AGGRAVATE CURRENT LOCALIZED FLOODING 
OCCURRING IN MANY PLACES.

LOCATIONS IN THE WARNING INCLUDE BUT ARE NOT LIMITED TO SHERRILL...
SAGEVILLE...RICKARDSVILLE...LUXEMBURG...HOLY CROSS...DURANGO AND
BALLTOWN

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

FLOODING OF SMALL STREAMS AND CREEKS...HIGHWAYS AND STREETS...
UNDERPASSES AND LOW LYING URBAN AND RURAL AREAS IS LIKELY.

LAT...LON 4238 9065 4230 9068 4233 9083 4264 9113
      4264 9088 4267 9086 4267 9084 4264 9070
      4257 9068 4255 9064 4247 9065 4239 9053

$$

NICHOLS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 17, 7:57 PM CDT	River Flood Advisory	DVN	Clinton, Scott	14 hr
Jul 17, 11:57 PM CDT	Severe Thunderstorm Warning	DVN	Dubuque	63 min
Jul 18, 6:55 AM CDT	Flash Flood Warning	DVN	Dubuque	2 hr
Jul 18, 9:50 AM CDT	River Flood Warning	DVN	Clinton, Scott	19 hr
Jul 18, 10:57 AM CDT	River Flood Advisory	DVN	Louisa	25 hr
Jul 18, 10:57 AM CDT	River Flood Advisory	DVN	Jones, Linn	10 hr
Jul 18, 10:57 AM CDT	River Flood Advisory	DVN	Delaware, Jones	10 hr
Jul 18, 10:57 AM CDT	River Flood Advisory	DVN	Jackson	10 hr
Jul 18, 6:17 PM CDT	Severe Thunderstorm Warning	DVN	Benton	58 min
Jul 18, 6:42 PM CDT	Severe Thunderstorm Warning	DVN	Linn	63 min
Jul 18, 6:46 PM CDT	Severe Thunderstorm Warning	DVN	Buchanan	44 min

Nearby

Flash Flood Warnings in Iowa, 2007 Every flash flood warning in 2007

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.