Alert archive / Iowa / River Flood Warnings in 2007

River Flood Warning 18, NWS Quad Cities, IA

August 9, 2007Johnson County, Washington County, Iowa

NWS Quad Cities, IA issued this river flood warning at Aug 9, 2007, 4:20 AM CDT for Johnson County, Washington County, Iowa. It was in force for 25 hr.

The area

The counties it named.

The facts

Issued: Aug 9, 2007, 4:20 AM CDT (09:20 UTC)
Expired: Aug 10, 2007, 5:05 AM CDT
In force: 25 hr
Issued by: NWS Quad Cities, IA
Flood severity: Minor

Counties Johnson County, IA, Washington County, IA

The radar

The Quad Cities radar (KDVN), 90 km from the middle of the area, began a volume at 09:22 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 river

Written for the forecast point English River at Kalona (KALI4).

Action stage: 13 ft
Minor stage: 14 ft
Moderate stage: 16 ft
Major stage: 18 ft

This gauge today: stage, forecast and historic crests

Stage from the USGS instantaneous record for site 05455500, one reading an hour, from a day before the product to a day after it ended. Flood stages are today's.

What forecasters said that day

The local office's own words before this river 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 river flood warning went out at Aug 9, 2:15 AM CDT, 2 hours 5 minutes earlier.

Area forecast discussion, Aug 9, 2:15 AM CDT, 2 hours 5 minutes before

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Hazardous weather outlook, Aug 8, 4:47 AM CDT, 23 hours 33 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
447 AM CDT WED AUG 8 2007

IAZ040>042-051>054-063>068-076>078-087>089-098-099-ILZ001-002-007-
009-015>018-024>026-034-035-MOZ009-010-091000-
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-
447 AM CDT WED AUG 8 2007

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

THERE IS A SLIGHT RISK OF SEVERE THUNDERSTORMS TODAY AND
TONIGHT. ONGOING STORMS THIS MORNING WILL DIMINISH AND EXIT THE
AREA BY MIDDAY. THUNDERSTORMS ARE EXPECTED TO DEVELOP AGAIN THIS
AFTERNOON AND EVENING IN IOWA...DEVELOPING INTO A LARGER COMPLEX
THAT MOVES ACROSS THE AREA THROUGH THE EVENING AND OVERNIGHT
HOURS. THE MAIN THREAT FROM THESE THUNDERSTORMS WILL BE HEAVY
RAINFALL AND DAMAGING WINDS.

A HEAT ADVISORY REMAINS IN EFFECT SOUTH OF A LINE FROM FAIRFIELD
TO GALESBURG. OPPRESSIVELY HOT AND HUMID AIR WILL REMAIN IN
PLACE...WITH LOCATIONS ALONG AND SOUTH OF INTERSTATE 80 REACHING
HEAT INDEX READINGS ABOVE 100 TODAY AND WITH WARM NIGHTTIME
TEMPERATURES CONTINUING TONIGHT.

.DAYS TWO THROUGH SEVEN...THURSDAY THROUGH TUESDAY

THUNDERSTORMS ARE POSSIBLE ON THURSDAY AS A WEAK FRONT SWEEPS
SOUTHEASTWARD ACROSS THE AREA DURING THE DAY...THOUGH THE CHANCE
OF SEVERE THUNDERSTORMS IS LOWER.

THE HEAT ADVISORY REMAINS IN EFFECT THROUGH THURSDAY
EVENING...WHEN THE WEAK FRONT MOVING THROUGH THE AREA WILL PROVIDE
A BRIEF RESPITE FROM THE HIGH HUMIDITY. HOT TEMPERATURES AND
INCREASING HUMIDITY ARE THEN EXPECTED ACROSS THE AREA THROUGH THE
WEEKEND AND INTO EARLY NEXT WEEK.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION MAY BE NEEDED LATER TODAY AND OVERNIGHT.
ALSO...ANY REPORTS OF HEAVY RAINFALL OVER 1 INCH OR FLOODING ARE
ENCOURAGED.

MAYES

In the hours before

Special weather statement, Aug 8, 11:00 PM CDT, 5 hours 20 minutes before

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE QUAD CITIES IA IL
1100 PM CDT WED AUG 8 2007

IAZ063>065-067-068-076>078-ILZ015-016-024-090700-
CEDAR IA-HENRY IL-IOWA IA-JOHNSON IA-KEOKUK IA-LOUISA IA-MERCER IL-
MUSCATINE IA-ROCK ISLAND IL-SCOTT IA-WASHINGTON IA-
1100 PM CDT WED AUG 8 2007

...STRONG THUNDERSTORMS WITH TORRENTIAL RAIN...

STRONG THUNDERSTORMS WILL CONTINUE THROUGH THE EARLY MORNING...
ESPECIALLY ALONG AND SOUTH OF INTERSTATE 80. THE THUNDERSTORMS WILL
BRING TORRENTIAL RAIN WITH RAINFALL RATES OF 1 TO 2 INCHES IN
LESS THAN AN HOUR...AND FREQUENT AND INTENSE LIGHTNING. GUSTY WINDS
OF 20 TO 35 MPH WILL ALSO BE POSSIBLE. THE THUNDERSTORMS WILL MOVE
OVER SOME OF THE SAME AREAS REPEATEDLY...ESPECIALLY BETWEEN
INTERSTATE 80 AND HIGHWAY 34...THEREBY ENHANCING RAINFALL AMOUNTS
AND THE POTENTIAL FOR FLASH FLOODING IN THESE AREAS. HEAVY RAINS MAY
FLOOD LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES. AVOID THESE
AREAS AND DO NOT CROSS FLOODED ROADS AS THEY MAY BE WASHED OUT. WATER
LEVELS OF SMALL STREAMS AND RIVERS MAY ALSO RISE...THEREFORE SEEK
HIGHER GROUND IF THREATENED BY FLOOD WATERS.

IAZ087>089-098-099-MOZ009-010-090700-
CLARK MO-DES MOINES IA-HENRY IA-JEFFERSON IA-LEE IA-SCOTLAND MO-
VAN BUREN IA-
1100 PM CDT WED AUG 8 2007

...THUNDERSTORMS WITH TORRENTIAL RAIN BECOMING WIDESPREAD...

THUNDERSTORMS WILL BECOME WIDESPREAD INTO THE EARLY MORNING. THE
STORMS WILL BRING TORRENTIAL RAIN WITH RAINFALL RATES OF 1 TO
2 INCHES IN LESS THAN AN HOUR...AND FREQUENT AND INTENSE LIGHTNING.
GUSTY WINDS OF 20 TO 35 MPH WILL ALSO BE POSSIBLE. THE THUNDERSTORMS
WILL MOVE OVER SOME OF THE SAME AREAS REPEATEDLY ENHANCING RAINFALL
AMOUNTS AND THE POTENTIAL FOR FLASH FLOODING. HEAVY RAINS MAY FLOOD
LOW LYING AREAS SUCH AS DITCHES AND UNDERPASSES. AVOID THESE AREAS
AND DO NOT CROSS FLOODED ROADS AS THEY MAY BE WASHED OUT. WATER
LEVELS OF SMALL STREAMS AND RIVERS MAY ALSO RISE...THEREFORE SEEK
HIGHER GROUND IF THREATENED BY FLOOD WATERS.

05

The office that day

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

Issued	Product	Office	Counties	Lasted
Aug 8, 9:40 PM CDT	River Flood Advisory	DVN	Johnson, Washington	24 hr
Aug 8, 9:40 PM CDT	River Flood Advisory	DVN	Keokuk	24 hr
Aug 8, 9:43 PM CDT	Flash Flood Warning	DVN	Keokuk	6 hr
Aug 9, 12:05 AM CDT	River Flood Warning	DVN	Keokuk	41 hr
Aug 9, 11:03 AM CDT	River Flood Warning	DVN	Henry, Jefferson, Washington	23 hr
Aug 9, 11:03 AM CDT	River Flood Warning	DVN	Des Moines, Henry, Lee	9 hr

Nearby

River Flood Warnings in Iowa, 2007 Every river 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; radar from the NEXRAD Level II archive; the gauge from the NWS water service and the USGS.