Alert archive / Illinois / Flash Flood Warnings in 2003
Flash Flood Warning 2, NWS Quad Cities, IA
NWS Quad Cities, IA issued this flash flood warning at Apr 30, 2003, 9:24 PM CDT for Henry 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, 9:24 PM CDT (02:24 UTC)
- Expired
- May 1, 2003, 2:15 AM CDT
- In force
- 5 hr
- Issued by
- NWS Quad Cities, IA
- Area
- Counties, with a storm outline in the text
County Henry County, IL
The radar
The Quad Cities radar (KDVN), 50 km from the middle of the area, began a volume at 02:28 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, 2.4 hours before the alert went out and 45 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 010224 FFWDVN ILC073-010715- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE QUAD CITIES IA IL 924 PM CDT WED APR 30 2003 THE NATIONAL WEATHER SERVICE IN THE QUAD CITIES HAS ISSUED A * FLASH FLOOD WARNING FOR... HENRY COUNTY IN NORTHWEST ILLINOIS * UNTIL 215 AM CDT * AT 915 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS WITH VERY HEAVY RAIN WERE OVER WESTERN HENRY COUNTY MOVING EAST AT 40 MPH. THUNDERSTORMS OVER THE SOUTHERN HALF OF THE COUNTY HAVE BEEN MOVING OVER THE SAME AREA REPEATEDLY OVER THE LAST HOUR. * NATIONAL WEATHER SERVICE DOPPLER RADAR ESTIMATES INDICATE THAT UP TO 4 TO 6 INCHES OF RAIN HAS FALLEN FROM THE CAMBRIDGE AREA WEST THROUGH OPHEIM SINCE 7 PM. JUST SOUTH OF THIS AREA RADAR ESTIMATED A LARGE AREA OF 2 TO 3 INCHES OF RAIN. HEAVY RAIN PRODUCING THUNDERSTORMS WILL CONTINUE TO MOVE ACROSS THE SOUTHERN HALF OF THE COUNTY UNTIL AT LEAST 1030 PM AND COULD PRODUCE ANOTHER 2 INCHES OF RAIN. THE HENRY COUNTY SHERIFF HAS ALREADY REPORTED CONSIDERABLE FLOODING OF LOW LYING AREAS...CITY STREETS AND SMALL CREEKS. THE ADDITIONAL RAINS WILL ADD TO 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. LAT...LON 4148 8987 4116 8987 4115 9045 4147 9043 $$ DLF
2 follow-up statements
000 WGUS73 KDVN 010421 FFSDVN ILC073-010715- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 1122 PM CDT WED APR 30 2003 ...A FLASH FLOOD WARNING CONTINUES UNTIL 215 AM CDT FOR HENRY COUNTY ILLINOIS... AT 1102 PM CDT...THE HEAVY RAIN PRODUCING THUNDERSTORMS HAVE MOVED OUT OF THE AREA. HOWEVER...RADAR INDICATED SCATTERED THUNDERSTORMS OVER MERCER AND ROCK ISLAND COUNTIES MOVING EAST AT 40 MPH. THESE STORMS WILL MOVE OVER HENRY COUNTY BY 1230 AM AND COULD PRODUCE ANOTHER ONE HALF INCH OF RAIN IN A FEW LOCATIONS. RADAR RAINFALL ESTIMATES SHOWED AN AREA OF 3 TO 6 INCHES OF RAIN OVER SOUTHERN HENRY COUNTY THROUGH WOODHULL...BISHOP HILL AND GALVA. AT 10 PM CDT A SPOTTER REPORTED 6 INCHES OF RAIN HAD FALLEN IN 3 HOURS NEAR NEW WINDSOR IN EXTREME SOUTHWEST HENRY COUNTY. EVEN THROUGH MOST OF THE HEAVY RAIN HAS ENDED...SCATTERED THUNDERSTORMS THROUGH 2 AM AND EXCESSIVE RUNOFF FROM EARLIER RAINS WILL AGGRAVATE ONGOING FLOODING. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED... QUICKLY MOVE TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT DRIVE YOUR VEHICLE INTO WATER COVERED ROADWAYS. THE WATER MAY BE TOO DEEP TO CROSS SAFELY OR THE ROAD COULD BE WASHED OUT. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY. $$ DLF
000 WGUS73 KDVN 010725 FFSDVN ILC073-010740- FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE QUAD CITIES IA IL 218 AM CDT THU MAY 1 2003 ...THE FLASH FLOOD WARNING WHICH WAS IN EFFECT UNTIL 215 AM CDT FOR HENRY COUNTY ILLINOIS...HAS BEEN ALLOWED TO EXPIRE... AT 212 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THAT THE HEAVY RAINFALL HAS SUBSIDED OVER THE WARNED AREA. ADDITIONAL RAIN WITH SOME EMBEDDED THUNDERSTORMS WILL CONTINUE IN HENRY COUNTY THROUGH AT LEAST 4 AM...BUT AGAIN THE HEAVY RAIN THREAT HAS SHIFTED EAST AND SOUTH OF THE AREA. PEOPLE WITH INTERESTS ALONG SPRING 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. EVEN THOUGH STREAMS AND CREEKS WERE RECEDING... SOME ROADWAYS MAY STILL BE COVERED WITH WATER. MOTORISTS ARE ADVISED TO AVOID DRIVING THROUGH FLOODED ROADWAYS. HENRY COUNTY OFFICIALS REPORTED THAT THE MAJOR STREET FLOODING HAS SUBSIDED. BUT NUISANCE FLOODING AND OTHER MINOR FLOODING PROBLEMS... WILL LAST INTO THURSDAY MORNING IN MUCH OF HENRY COUNTY. 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. $$ 12
The office that day
Everything else NWS Quad Cities, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 30, 7:20 PM CDT | Tornado Warning | DVN | Henry | 55 min |
| Apr 30, 8:00 PM CDT | Flash Flood Warning | DVN | Mercer | 5 hr |
| 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, 9:37 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 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.