Alert archive / Iowa / Flash Flood Watches in 2021
Flash Flood Watch 1, NWS Des Moines, IA
NWS Des Moines, IA issued this flash flood watch at Jun 24, 2021, 6:55 PM CDT for 12 counties in Iowa. It was in force for 12 hr.
The area
The counties it named.
The facts
- Issued
- Jun 24, 2021, 6:55 PM CDT (23:55 UTC)
- Expired
- Jun 25, 2021, 6:34 AM CDT
- In force
- 12 hr
- Issued by
- NWS Des Moines, IA
- Flood severity
- None
Counties Adams County, IA, Appanoose County, IA, Clarke County, IA, Davis County, IA, Decatur County, IA, Lucas County, IA, Monroe County, IA, Ringgold County, IA, Taylor County, IA, Union County, IA, Wapello County, IA, Wayne County, IA
The radar
The Des Moines radar (KDMX), 95 km from the middle of the area, began a volume at 23:57 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
Omaha, NE (KOAX), launched 12:00Z, 11.9 hours before the alert went out and 241 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
- 23 J/kg
- Mixed-layer CIN
- -488 J/kg
- Mixed-layer LCL
- 2303 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- 309 m²/s²
- 0-3 km storm-relative helicity
- 375 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
905 WGUS63 KDMX 242355 FFADMX URGENT - IMMEDIATE BROADCAST REQUESTED Flood Watch National Weather Service Des Moines IA 655 PM CDT Thu Jun 24 2021 IAZ081>086-092>097-250800- /O.NEW.KDMX.FF.A.0001.210624T2355Z-210625T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Adams-Union-Clarke-Lucas-Monroe-Wapello-Taylor-Ringgold-Decatur- Wayne-Appanoose-Davis- Including the cities of Bedford, Creston, Bloomfield, Seymour, Albia, New Market, Allerton, Chariton, Humeston, Leon, Osceola, Lamoni, Corning, Mount Ayr, Corydon, Centerville, Ottumwa, and Lenox 655 PM CDT Thu Jun 24 2021 ...FLASH FLOOD WATCH IN EFFECT THROUGH FRIDAY MORNING... The National Weather Service in Des Moines has issued a * Flash Flood Watch for portions of south central Iowa, southeast Iowa and southwest Iowa, including the following areas, in south central Iowa, Appanoose, Clarke, Decatur, Lucas, Monroe, Ringgold, Union and Wayne. In southeast Iowa, Davis and Wapello. In southwest Iowa, Adams and Taylor. * Through Friday morning. * Thunderstorms with heavy rain are expected tonight over southern Iowa. Some of this heavy rain may lead to flash flooding. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ Zogg
2 follow-up statements
192 WGUS63 KDMX 250921 FFADMX Flood Watch National Weather Service Des Moines IA 421 AM CDT Fri Jun 25 2021 ...Flash Flood Watch until 7 AM this Morning... .Though the rain has ended across the region for now, there remains some thunderstorm activity in northeast Kansas which may clip far southern Iowa counties with isolated heavy rainfall yet early this morning. IAZ081>086-092>097-251200- /O.CON.KDMX.FF.A.0001.000000T0000Z-210625T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Adams-Union-Clarke-Lucas-Monroe-Wapello-Taylor-Ringgold-Decatur- Wayne-Appanoose-Davis- Including the cities of Corning, Creston, Osceola, Chariton, Albia, Ottumwa, Bedford, Lenox, New Market, Mount Ayr, Lamoni, Leon, Corydon, Seymour, Allerton, Humeston, Centerville, and Bloomfield 421 AM CDT Fri Jun 25 2021 ...FLASH FLOOD WATCH REMAINS IN EFFECT UNTIL 7 AM CDT THIS MORNING... The Flash Flood Watch continues for * Portions of south central Iowa, southeast Iowa, and southwest Iowa, including the following areas, in south central Iowa, Appanoose, Clarke, Decatur, Lucas, Monroe, Ringgold, Union, and Wayne. In southeast Iowa, Davis and Wapello. In southwest Iowa, Adams and Taylor. * Until 7 AM CDT this morning * Thunderstorms over northeast Kansas may edge north into southern Iowa prior to 7 am. If this occurs, this may lead to isolated flash flooding. PRECAUTIONARY/PREPAREDNESS ACTIONS... You should monitor later forecasts and be prepared to take action should Flash Flood Warnings be issued. && $$ REV
191 WGUS63 KDMX 251134 FFADMX Flood Watch National Weather Service Des Moines IA 634 AM CDT Fri Jun 25 2021 ...Threat For Heavy Rainfall Has Ended for Now... .Showers and thunderstorms continue across Missouri early this morning. Though a few showers may creep into southern Iowa this morning, the threat for any additional flash flooding has ended for now. Later today and tonight, additional rainfall may impact the same areas of southern Iowa. If a renewed threat for flash flooding is expected, an additional watch will be issued this afternoon. IAZ081>086-092>097-251245- /O.CAN.KDMX.FF.A.0001.000000T0000Z-210625T1200Z/ /00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/ Adams-Union-Clarke-Lucas-Monroe-Wapello-Taylor-Ringgold-Decatur- Wayne-Appanoose-Davis- Including the cities of Corning, Creston, Osceola, Chariton, Albia, Ottumwa, Bedford, Lenox, New Market, Mount Ayr, Lamoni, Leon, Corydon, Seymour, Allerton, Humeston, Centerville, and Bloomfield 634 AM CDT Fri Jun 25 2021 ...FLASH FLOOD WATCH IS CANCELLED... The Flash Flood Watch for portions of south central Iowa, southeast Iowa, and southwest Iowa has been cancelled. Several Areal Flood Warnings remain in effect until this afternoon and affect portions of Appanoose, Lucas, Monroe, Wayne, Davis and Wapello Counties. If high water or barricades are encountered, avoid these areas. Turn Around, Don't Drown. $$ REV
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 24, 3:05 AM CDT | Special Weather Statement | DMX | Audubon, Carroll, Crawford, Sac | 55 min |
| Jun 24, 3:58 AM CDT | Special Weather Statement | DMX | Audubon, Calhoun, Carroll, Dallas, Greene, Guthrie and 2 more | 62 min |
| Jun 24, 4:38 AM CDT | Special Weather Statement | DMX | Boone, Dallas, Greene, Polk, Story | 52 min |
| Jun 24, 6:18 PM CDT | Tornado Warning | DMX | Adams | 27 min |
Nearby
Flash Flood Watches in Iowa, 2021Every flash flood watch in 2021
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.