Alert archive / Iowa / Flash Flood Warnings in 2005
Flash Flood Warning 36, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this flash flood warning at Jun 25, 2005, 2:23 AM CDT for Plymouth County, Iowa. It was in force for 2 hr. 1 report came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Jun 25, 2005, 2:23 AM CDT (07:23 UTC)
- Expired
- Jun 25, 2005, 4:30 AM CDT
- In force
- 2 hr
- Issued by
- NWS Sioux Falls, SD
- Area
- Counties, with a storm outline in the text
County Plymouth County, IA
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jun 25, 2:48 AM CDT | FLASH FLOOD | Le Mars, IA | LOTS OF STREET FLOODING IN LEMARS...ALSO FIELDS AROUND LEMARS ARE BEGINNING TO FLOOD. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 7.4 hours before the alert went out and 166 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
- 2829 J/kg
- Mixed-layer CIN
- -49 J/kg
- Mixed-layer LCL
- 1743 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 155 m²/s²
- 0-3 km storm-relative helicity
- 310 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 19.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 WGUS53 KFSD 250727 FFWFSD IAC149-250930- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 223 AM CDT SAT JUN 25 2005 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A * FLASH FLOOD WARNING FOR... PLYMOUTH COUNTY IN NORTHWEST IOWA * UNTIL 430 AM CDT * AT 223 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED THUNDERSTORMS WITH HEAVY RAIN COVERING ALL OF NORTHERN PLYMOUTH COUNTY...WITH MORE STORMS DEVELOPING TO THE SOUTHWEST. RAINFALL ESTIMATES UP TO FOUR INCHES ARE INDICATED IN CENTRAL PLYMOUTH COUNTY...WEST OF LEMARS. THE HEAVY RAIN IS EXPECTED TO CONTINUE FOR THE NEXT HOUR OR TWO. BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE DANGERS OF FLOODING. IF FLASH FLOODING IS OBSERVED ACT QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING. DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS SAFELY. LAT...LON 4289 9651 4268 9652 4269 9590 4290 9590 $$ GH
2 follow-up statements
000 WGUS73 KFSD 250822 FFSFSD FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 319 AM CDT SAT JUN 25 2005 IAC149-250930- PLYMOUTH IA- 319 AM CDT SAT JUN 25 2005 ...A FLASH FLOOD WARNING CONTINUES UNTIL 430 AM CDT FOR PLYMOUTH COUNTY... AT 316 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO INDICATE HEAVY RAIN ACROSS PORTIONS OF PLYMOUTH COUNTY. THE HEAVIEST RAIN HAS SHIFTED TO THE SOUTHERN PART OF THE COUNTY...WITH LIGHT RAIN CONTINUING ACROSS THE NORTH. STREET FLOODING WAS REPORTED IN LEMARS AT 248 AM...WITH FIELDS AROUND LEMARS STARTING TO FLOOD AT THAT TIME. EXCESSIVE RUNOFF FROM HEAVY RAINFALL WILL CAUSE FLOODING OF SMALL CREEKS AND STREAMS...HIGHWAYS AND UNDERPASSES. ADDITIONALLY...COUNTRY ROADS AND FARMLANDS ALONG THE BANKS OF CREEKS...STREAMS AND OTHER LOW LYING AREAS ARE SUBJECT TO FLOODING. LAT...LON 4289 9651 4268 9652 4269 9590 4290 9590 $$ GH
000 WGUS73 KFSD 250930 FFSFSD FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 428 AM CDT SAT JUN 25 2005 IAC149-250938- PLYMOUTH IA- 428 AM CDT SAT JUN 25 2005 ...THE FLASH FLOOD WARNING FOR PLYMOUTH COUNTY HAS EXPIRED... THE HEAVY RAIN PRODUCING THUNDERSTORMS HAVE WEAKENED...WHILE SHIFTING TO A PART OF PLYMOUTH COUNTY THAT DID NOT RECEIVE A LOT OF RAIN. THEREFORE...THE FLASH FLOOD WARNING HAS BEEN ALLOWED TO EXPIRE. LAT...LON 4289 9651 4268 9652 4269 9590 4290 9590 $$ GH
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 24, 9:30 PM CDT | Severe Thunderstorm Warning | FSD | Woodbury | 46 min |
| Jun 24, 9:40 PM CDT | Severe Thunderstorm Warning | FSD | Buena Vista | 37 min |
| Jun 24, 10:26 PM CDT | Severe Thunderstorm Warning | FSD | Woodbury | 35 min |
| Jun 24, 11:16 PM CDT | Flash Flood Warning | FSD | Buena Vista | 4 hr |
| Jun 24, 11:44 PM CDT | Flash Flood Warning | FSD | Cherokee | 4 hr |
| Jun 25, 3:10 AM CDT | Flash Flood Warning | FSD | Buena Vista, Cherokee | 2 hr |
| Jun 25, 5:11 AM CDT | Flash Flood Warning | FSD | Buena Vista, Cherokee | 64 min |
| Jun 25, 6:09 AM CDT | Flash Flood Warning | FSD | Buena Vista | 2 hr |
Nearby
Flash Flood Warnings in Iowa, 2005Every flash flood warning in 2005
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.