Alert archive / Iowa / Flash Flood Warnings in 2016
Flash Flood Warning 12, NWS La Crosse, WI
NWS La Crosse, WI issued this flash flood warning at Jul 23, 2016, 2:04 PM CDT for 4 counties in Iowa. It was in force for 3 hr. 2 reports 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
- Jul 23, 2016, 2:04 PM CDT (19:04 UTC)
- Expired
- Jul 23, 2016, 5:00 PM CDT
- In force
- 3 hr
- Issued by
- NWS La Crosse, WI
- Area
- Storm-based polygon
- Flood severity
- None
Counties Chickasaw County, IA, Fayette County, IA, Howard County, IA, Winneshiek County, IA
The radar
The La Crosse radar (KARX), 101 km from the middle of the area, began a volume at 19:03 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 23, 2:47 PM CDT | FLASH FLOOD | 2 Nne Fredericksburg, IA | NUMEROUS WASHOUT ON ROANOKE AVE BETWEEN 200TH AND 270TH ST. |
| Jul 23, 3:32 PM CDT | FLASH FLOOD | 2 E Kendallville, IA | WATER FROM THE UPPER IOWA RIVER WAS COVERING COUNTY ROAD W14. |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 7.1 hours before the alert went out and 210 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
- 2703 J/kg
- Mixed-layer CIN
- -29 J/kg
- Mixed-layer LCL
- 782 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- -5 m²/s²
- 0-3 km storm-relative helicity
- 4 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.4
The text
As transmitted.
414 WGUS53 KARX 231904 FFWARX IAC037-065-089-191-232200- /O.NEW.KARX.FF.W.0012.160723T1904Z-160723T2200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE LA CROSSE WI 204 PM CDT SAT JUL 23 2016 THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A * FLASH FLOOD WARNING FOR... NORTHERN FAYETTE COUNTY IN NORTHEASTERN IOWA... CHICKASAW COUNTY IN NORTHEASTERN IOWA... HOWARD COUNTY IN NORTHEASTERN IOWA... WINNESHIEK COUNTY IN NORTHEASTERN IOWA... * UNTIL 500 PM CDT * AT 159 PM CDT...DOPPLER RADAR INDICATED THUNDERSTORMS PRODUCING HEAVY RAIN ACROSS THE WARNED AREA. TWO TO FOUR INCHES OF RAIN HAVE ALREADY FALLEN. AN ADDITIONAL ONE TO TWO INCHES OF RAIN ARE POSSIBLE AS ANOTHER AREA OF STRONG THUNDERSTORMS MOVE THROUGH NORTHEAST IOWA THROUGH 5 PM. FLASH FLOODING IS EXPECTED TO BEGIN SHORTLY. * CAMPERS NEAR RIVERS AND STREAMS SHOULD CONSIDER EVACUATION AS WATER LEVELS WILL RISE RAPIDLY. * SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... DECORAH...CRESCO...NEW HAMPTON...WEST UNION...NASHUA...CALMAR... FREDERICKSBURG...OSSIAN...RICEVILLE...ELGIN...CLERMONT...AND ELMA. PRECAUTIONARY/PREPAREDNESS ACTIONS... TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD DEATHS OCCUR IN VEHICLES. FLOODING IS OCCURRING OR IS IMMINENT. IT IS IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO STREAMS...RIVERS...OR CREEKS WHICH CAN BECOME KILLERS IN HEAVY RAINS. CAMPERS AND HIKERS SHOULD AVOID STREAMS OR CREEKS. && LAT...LON 4350 9255 4350 9161 4290 9161 4291 9255 $$ ROGERS
2 follow-up statements
759 WGUS73 KARX 232033 FFSARX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LA CROSSE WI 333 PM CDT SAT JUL 23 2016 IAC037-065-089-191-232200- /O.CON.KARX.FF.W.0012.000000T0000Z-160723T2200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ FAYETTE IA-CHICKASAW IA-HOWARD IA-WINNESHIEK IA- 333 PM CDT SAT JUL 23 2016 ...THE FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 500 PM CDT FOR NORTHERN FAYETTE...CHICKASAW...HOWARD AND WINNESHIEK COUNTIES... AT 328 PM CDT...DOPPLER RADAR AND AUTOMATED RAIN GAUGES INDICATED THREE TO FIVE INCHES OF RAIN HAVE FALLEN OVER THE WARNED AREA. WHILE THE HEAVIEST RAINFALL HAS NOW MOVED EASTWARD INTO FAR NORTHEAST IOWA AND SOUTHWEST WISCONSIN...AN ADDITIONAL HALF INCH OF RAIN IS POSSIBLE THROUGH 500 PM. FLASH FLOODING WILL CONTINUE AS WATER MOVES INTO AND THROUGH THE RIVER SYSTEM. CAMPERS NEAR RIVERS AND STREAMS SHOULD CONSIDER EVACUATION AS WATER LEVELS WILL RISE RAPIDLY. SOME LOCATIONS THAT WILL EXPERIENCE FLOODING INCLUDE... DECORAH...CRESCO...NEW HAMPTON...WEST UNION...NASHUA...CALMAR... FREDERICKSBURG...OSSIAN...RICEVILLE...ELGIN...CLERMONT...AND ELMA.. PRECAUTIONARY/PREPAREDNESS ACTIONS... TURN AROUND...DON'T DROWN WHEN ENCOUNTERING FLOODED ROADS. MOST FLOOD DEATHS OCCUR IN VEHICLES. FLOODING IS OCCURRING OR IS IMMINENT. IT IS IMPORTANT TO KNOW WHERE YOU ARE RELATIVE TO STREAMS...RIVERS...OR CREEKS WHICH CAN BECOME KILLERS IN HEAVY RAINS. CAMPERS AND HIKERS SHOULD AVOID STREAMS OR CREEKS. && LAT...LON 4350 9255 4350 9161 4290 9161 4291 9255 $$ ROGERS
952 WGUS73 KARX 232153 FFSARX FLASH FLOOD STATEMENT NATIONAL WEATHER SERVICE LA CROSSE WI 453 PM CDT SAT JUL 23 2016 IAC037-065-089-191-232200- /O.EXP.KARX.FF.W.0012.000000T0000Z-160723T2200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ FAYETTE IA-CHICKASAW IA-HOWARD IA-WINNESHIEK IA- 453 PM CDT SAT JUL 23 2016 ...THE FLASH FLOOD WARNING FOR NORTHERN FAYETTE...CHICKASAW...HOWARD AND WINNESHIEK COUNTIES WILL EXPIRE AT 500 PM CDT... THE HEAVY RAIN HAS ENDED. AS WATER MOVES INTO AND THROUGH THE RIVER SYSTEM...CONTINUE TO MONITOR RIVER LEVELS AND BE PREPARED TO SEEK HIGHER GROUND IF NECESSARY. PLEASE CONTINUE TO HEED ANY REMAINING ROAD CLOSURES...AS THERE HAVE BEEN REPORTS OF SOME ROAD WASH OUTS ACROSS PORTIONS OF NORTHEAST IOWA. LAT...LON 4350 9255 4350 9161 4290 9161 4291 9255 $$ ROGERS
The office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 23, 12:03 PM CDT | Flash Flood Warning | ARX | Clayton | 6 hr |
| Jul 23, 2:57 PM CDT | Flash Flood Warning | ARX | Allamakee, Clayton | 3 hr |
| Jul 23, 5:08 PM CDT | Special Weather Statement | ARX | Dubuque | 37 min |
Nearby
Flash Flood Warnings in Iowa, 2016Every flash flood warning in 2016
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; radar from the NEXRAD Level II archive.