Alert archive / Iowa / Flash Flood Watches in 2008
Flash Flood Watch 4, NWS Quad Cities, IA
NWS Quad Cities, IA issued this flash flood watch at Apr 9, 2008, 3:15 AM CDT for 18 counties in Iowa; 13 counties in Illinois; Clark County, Scotland County, Missouri. It took effect at Apr 10, 2008, 1:00 AM CDT. It was in force for 20 hr.
The area
The counties it named.
The facts
- Issued
- Apr 9, 2008, 3:15 AM CDT (08:15 UTC)
- In effect from
- Apr 10, 2008, 1:00 AM CDT
- Expired
- Apr 10, 2008, 9:07 PM CDT
- In force
- 20 hr
- Issued by
- NWS Quad Cities, IA
- Flood severity
- None
All 33 counties
Cedar County, IA, Clinton County, IA, Des Moines County, IA, Dubuque County, IA, Henry County, IA, Iowa County, IA, Jackson County, IA, Jefferson County, IA, Johnson County, IA, Jones County, IA, Keokuk County, IA, Lee County, IA, Linn County, IA, Louisa County, IA, Muscatine County, IA, Scott County, IA, Van Buren County, IA, Washington County, IA, Bureau County, IL, Carroll County, IL, Hancock County, IL, Henderson County, IL, Henry County, IL, Jo Daviess County, IL, McDonough County, IL, Mercer County, IL, Putnam County, IL, Rock Island County, IL, Stephenson County, IL, Warren County, IL, Whiteside County, IL, Clark County, MO, Scotland County, MO
The radar
The Quad Cities radar (KDVN), 40 km from the middle of the area, began a volume at 08:21 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
Davenport, (KDVN), launched 00:00Z, 8.3 hours before the alert went out and 46 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 460 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- 289 m²/s²
- 0-3 km storm-relative helicity
- 497 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
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 Quad Cities, IA wrote its last area forecast discussion before this flash flood watch went out at Apr 8, 3:11 PM CDT, 12 hours 4 minutes earlier.
Area forecast discussion, Apr 8, 3:11 PM CDT, 12 hours 4 minutes before
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</html>Hazardous weather outlook, Apr 8, 4:49 AM CDT, 22 hours 26 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE QUAD CITIES IA IL 449 AM CDT TUE APR 8 2008 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- 449 AM CDT TUE APR 8 2008 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 HEAVY RAIN IS EXPECTED TODAY...ESPECIALLY EAST OF A LINE FROM FAIRFIELD TO DUBUQUE. PERIODS OF RAIN...HEAVY AT TIMES WILL SPREAD ACROSS THE ENTIRE OUTLOOK AREA DURING THE DAY TODAY. THUNDERSTORMS WILL BE EMBEDDED IN THE RAIN...ESPECIALLY THIS MORNING. LOCATIONS MOST LIKELY TO HEAR THUNDER WILL BE SOUTHEAST IOWA...AND ALL ILLINOIS AND MISSOURI COUNTIES. THUNDERSTORMS ARE NOT EXPECTED TO BE SEVERE. WIDESPREAD RAINFALL OF ONE HALF TO ONE INCH IS LIKELY ACROSS THE ENTIRE OUTLOOK AREA...WITH POTENTIAL FOR GREATER THAN ONE INCH EAST OF A FAIRFIELD TO DUBUQUE LINE. MINOR FLOODING CONTINUES ON A FEW TRIBUTARY RIVERS IN EASTERN IOWA AND NORTHWEST ILLINOIS. PLEASE SEE THE LATEST FLOOD STATEMENT FOR FURTHER DETAILS. .DAYS TWO THROUGH SEVEN...WEDNESDAY THROUGH MONDAY HEAVY RAINFALL IS LIKELY LATE WEDNESDAY NIGHT INTO THURSDAY EVENING AS AN STRONG SPRING STORM SYSTEM SLOWLY MOVES INTO THE AREA. WIDESPREAD RAINFALL AMOUNTS IN THE RANGE OF 1 TO 2 INCHES ARE EXPECTED THURSDAY...WITH LOCALLY HIGHER AMOUNTS POSSIBLE. THIS MAY RESULT IN PONDING OF WATER IN LOW LYING AREAS AND LEAD TO ADDITIONAL RISES AND FLOODING ON AREA RIVERS. THERE IS A SLIGHT RISK FOR SEVERE STORMS THURSDAY IN THE AREA ALONG AND SOUTH OF HIGHWAY 30. THE PRIMARY SEVERE WEATHER THREAT IS LARGE HAIL WITH A SECONDARY THREAT FOR DAMAGING WIND WITH STORMS IN THE AFTERNOON AND EARLY EVENING HOURS. NON-SEVERE THUNDERSTORMS ARE POSSIBLE ACROSS MUCH OF THE OUTLOOK AREA FROM LATE WEDNESDAY NIGHT THROUGH THURSDAY NIGHT. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION WILL NOT BE NEEDED TODAY OR TONIGHT. ERVIN/SHEETS
The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 9, 3:57 AM CDT | River Flood Warning | DVN | Lee | 30 hr |
| Apr 9, 9:52 AM CDT | River Flood Warning | DVN | Johnson, Louisa, Washington | 4 days |
| Apr 9, 9:52 AM CDT | River Flood Warning | DVN | Des Moines, Henry, Lee | 3 days |
| Apr 9, 10:15 AM CDT | River Flood Warning | DVN | Hancock | 43 days |
Nearby
Flash Flood Watches in Iowa, 2008Flash Flood Watches in Illinois, 2008Flash Flood Watches in Missouri, 2008Every flash flood watch in 2008
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.