Alert archive / Iowa / Flash Flood Warnings in 2003
Flash Flood Warning 1, NWS Quad Cities, IA
NWS Quad Cities, IA issued this flash flood warning at Apr 30, 2003, 8:00 PM CDT for Louisa County, Iowa; Mercer County, Illinois. It was in force for 5 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 30, 2003, 8:00 PM CDT (01:00 UTC)
- Expired
- May 1, 2003, 12:45 AM CDT
- In force
- 5 hr
- Issued by
- NWS Quad Cities, IA
- Area
- Counties, with a storm outline in the text
Counties Louisa County, IA, Mercer County, IL
The radar
The Quad Cities radar (KDVN), 50 km from the middle of the area, began a volume at 01:00 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, 1.0 hours before the alert went out and 54 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
- 1022 J/kg
- Mixed-layer CIN
- -104 J/kg
- Mixed-layer LCL
- 839 m above ground
- 0-6 km bulk shear
- 63 kt
- 0-1 km storm-relative helicity
- 457 m²/s²
- 0-3 km storm-relative helicity
- 611 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 12.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS53 KDVN 010059 FFWDVN IAC115-ILC131-010545- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE QUAD CITIES IA IL 800 PM CDT WED APR 30 2003 THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A * FLASH FLOOD WARNING FOR... MERCER COUNTY IN NORTHWEST ILLINOIS LOUISA COUNTY IN SOUTHEAST IOWA * UNTIL 1245 AM CDT * AT 752 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING VERY HEAVY RAIN WERE LOCATED OVER THE WARNED AREA. * NATIONAL WEATHER SERVICE DOPPLER RADAR ESTIMATES INDICATE THAT UP 2 TO 3 INCHES OF RAIN HAS FALLEN IN AN AREA FROM WEST OF CAIRO IN WESTERN LOUISA COUNTY IOWA TO ALEDO IN MERCER COUNTY ILLINOIS. ADDITIONAL THUNDERSTORMS WITH HEAVY RAIN WERE LOCATED TO THE WEST OVER WASHINGTON COUNTY...AND WERE MOVING EAST AT 20 MPH. THESE THUNDERSTORMS HAVE THE POTENTIAL TO PRODUCE ANOTHER 2 INCHES OF RAIN BY 10 PM OVER LOUISA AND MERCER COUNTIES. THIS RAIN...AND THE ADDITIONAL EXPECTED HEAVY RAINFALL WILL CAUSE LOCAL STREAMS AND RIVERS TO RISE RAPIDLY AND OVERFLOW THEIR BANKS. EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS AND STREAMS AND OTHER LOW LYING AREAS ARE SUBJECT TO FLASH FLOODING. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED... QUICKLY MOVE TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT DRIVE YOUR VEHICLE INTO WATER COVERED ROADWAYS. THE WATER MAY BE TOO DEEP TO CROSS SAFELY OR THE ROAD COULD BE WASHED OUT. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY. LAT...LON 4110 9045 4111 9133 4135 9144 4132 9045 $$ DLF
2 follow-up statements
000 WGUS73 KDVN 010407 CCA FFSDVN IAC115-ILC131-010545- FLASH FLOOD STATEMENT...CORRECTED COUNTY CODES AND HEADLINE NATIONAL WEATHER SERVICE QUAD CITIES IA IL 1048 PM CDT WED APR 30 2003 ...A FLASH FLOOD WARNING CONTINUES UNTIL 1245 AM THURSDAY CDT FOR LOUISA AND MERCER COUNTIES... AT 1048 PM CDT...MOST OF THE HEAVY RAIN PRODUCING THUNDERSTORMS HAVE MOVED OUT OF THE AREA. RADAR WAS INDICATING SCATTERED STRONG THUNDERSTORMS FROM WAPELLO TO EAST OF ELIZA MOVING EAST AT 40 MPH. RADAR RAINFALL ESTIMATES SHOW THAT UP TO 4 INCHES OF RAIN MAY HAVE FALLEN OVER NORTHERN WAPELLO COUNTY WHILE A SWATH OF RAIN OF 4 TO 6 INCHES OR MORE FELL FROM EAST OF JOY THROUGH ALEDO TO SOUTHEAST OF SHERARD. THE LOUISA COUNTY SHERIFF REPORTED THAT DITCHES WERE OVERFLOWING ALONG HIGHWAY 61 NORTH OF WAPELLO AND STREET FLOODING DUE TO BACKED UP STORM DRAINS WAS OCCURRING IN WAPELLO AND GRANDVIEW. THE MERCER COUNTY SHERIFFS OFFICE SAID NUMEROUS REPORTS OF FLOODING HAVE BEEN CALLED IN TO THEIR OFFICE. SOME OF THE MORE SIGNIFICANT REPORTS INCLUDE AS MUCH AS 2 TO 3 FT OF WATER OVER SOME STREETS IN ALEDO...WATER 3 TO 4 FT DEEP OVER 30TH AVENUE JUST WEST OF HIGHWAY 94...WATER OF UNKNOWN DEPTH RUNNING OVER ROUTE 17 AND ROUTE 94 SOUTH OF ALEDO. A SHERIFFS DEPUTY ALSO ADVISED THAT POPE CREEK WAS AT BANK FULL AND WOULD LIKELY OVERFLOW ITS BANKS BY MORNING. EVEN THOUGH MOST OF THE RAIN HAS ENDED...SCATTERED THUNDERSTORMS THROUGH MIDNIGHT AND CONTINUED EXCESSIVE RUNOFF WILL CONTINUE TO AGGRAVATE THE ONGOING FLOODING. EXCESSIVE RUNOFF FROM THIS STORM WILL CAUSE FLASH FLOODING OF SMALL CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS AND STREAMS AND OTHER LOW LYING AREAS ARE SUBJECT TO FLASH FLOODING. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED... QUICKLY MOVE TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT DRIVE YOUR VEHICLE INTO WATER COVERED ROADWAYS. THE WATER MAY BE TOO DEEP TO CROSS SAFELY OR THE ROAD COULD BE WASHED OUT. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY. $$ DLF
000 WGUS73 KDVN 010557 FFSDVN IAC115-ILC131-010615- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 1250 AM CDT THU MAY 1 2003 ...THE FLASH FLOOD WARNING WHICH WAS IN EFFECT UNTIL 1245 AM CDT FOR LOUISA AND MERCER COUNTIES...HAS BEEN ALLOWED TO EXPIRE... THE HEAVY RAINFALL HAS SUBSIDED OVER THE WARNED AREA. PEOPLE WITH INTERESTS ALONG POPE CREEK AND THE EDWARDS RIVER SHOULD STILL MONITOR THOSE AREAS FOR HIGH WATER...BUT OTHER STREAMS AND CREEKS HAVE RECEDED OR WERE BEGINNING TO RECEDE. THUS MANY OF THE FLOOD THREATS WERE ENDING. EVEN THOUGH STREAMS AND CREEKS WERE RECEDING... SOME ROADWAYS MAY STILL BE COVERED WITH WATER. MOTORISTS ARE ADVISED TO AVOID DRIVING THROUGH FLOODED ROADWAYS. NUISANCE FLOODING WILL LAST INTO THURSDAY MORNING IN MUCH OF LOUISA AND MERCER COUNTIES. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED... QUICKLY MOVE TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT DRIVE YOUR VEHICLE INTO WATER COVERED ROADWAYS. THE WATER MAY BE TOO DEEP TO CROSS SAFELY OR THE ROAD COULD BE WASHED OUT. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY. $$ 12
The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 30, 7:06 PM CDT | Severe Thunderstorm Warning | DVN | Jefferson | 39 min |
| Apr 30, 7:11 PM CDT | Tornado Warning | DVN | Washington | 34 min |
| Apr 30, 7:28 PM CDT | Severe Thunderstorm Warning | DVN | Jefferson | 17 min |
| Apr 30, 7:43 PM CDT | Severe Thunderstorm Warning | DVN | Johnson | 32 min |
| Apr 30, 7:46 PM CDT | Severe Thunderstorm Warning | DVN | Jefferson | 29 min |
| Apr 30, 7:50 PM CDT | Severe Thunderstorm Warning | DVN | Louisa | 40 min |
| Apr 30, 7:53 PM CDT | Severe Thunderstorm Warning | DVN | Henry | 37 min |
| Apr 30, 7:58 PM CDT | Severe Thunderstorm Warning | DVN | Muscatine | 47 min |
| Apr 30, 8:14 PM CDT | Severe Thunderstorm Warning | DVN | Benton, Buchanan, Linn | 46 min |
| Apr 30, 8:32 PM CDT | Severe Thunderstorm Warning | DVN | Delaware | 28 min |
| Apr 30, 9:27 PM CDT | Severe Thunderstorm Warning | DVN | Des Moines | 48 min |
| Apr 30, 9:33 PM CDT | Severe Thunderstorm Warning | DVN | Buchanan | 27 min |
| Apr 30, 9:38 PM CDT | Severe Thunderstorm Warning | DVN | Jones, Linn | 22 min |
| Apr 30, 10:05 PM CDT | Severe Thunderstorm Warning | DVN | Benton, Iowa | 25 min |
| Apr 30, 10:42 PM CDT | Severe Thunderstorm Warning | DVN | Lee | 48 min |
| Apr 30, 7:20 PM CDT | Tornado Warning | DVN | Henry | 55 min |
| Apr 30, 8:22 PM CDT | Tornado Warning | DVN | Henry | 38 min |
| Apr 30, 8:25 PM CDT | Severe Thunderstorm Warning | DVN | Rock Island | 50 min |
| Apr 30, 8:36 PM CDT | Severe Thunderstorm Warning | DVN | Mercer | 39 min |
| Apr 30, 8:44 PM CDT | Tornado Warning | DVN | Bureau | 61 min |
| Apr 30, 8:55 PM CDT | Tornado Warning | DVN | Bureau | 50 min |
| Apr 30, 9:02 PM CDT | Severe Thunderstorm Warning | DVN | Henry | 58 min |
| Apr 30, 9:24 PM CDT | Flash Flood Warning | DVN | Henry | 5 hr |
| Apr 30, 9:37 PM CDT | Tornado Warning | DVN | Putnam | 38 min |
| Apr 30, 9:42 PM CDT | Severe Thunderstorm Warning | DVN | Henderson | 48 min |
| Apr 30, 9:48 PM CDT | Tornado Warning | DVN | Bureau | 57 min |
| Apr 30, 10:02 PM CDT | Severe Thunderstorm Warning | DVN | Warren | 43 min |
| Apr 30, 10:15 PM CDT | Tornado Warning | DVN | Putnam | 45 min |
Nearby
Flash Flood Warnings in Iowa, 2003Flash Flood Warnings in Illinois, 2003Every flash flood warning in 2003
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.