Alert archive / Nebraska / Flash Flood Warnings in 2021
Flash Flood Warning 6, NWS Omaha, NE
NWS Omaha, NE issued this flash flood warning at Jun 25, 2021, 4:40 PM CDT for Cedar County, Wayne County, Nebraska. It was in force for 3 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
- Jun 25, 2021, 4:40 PM CDT (21:40 UTC)
- Expired
- Jun 25, 2021, 7:45 PM CDT
- In force
- 3 hr
- Issued by
- NWS Omaha, NE
- Area
- Storm-based polygon
- Flood severity
- None
Counties Cedar County, NE, Wayne County, NE
The radar
The Omaha radar (KOAX), 131 km from the middle of the area, began a volume at 21:43 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, 9.7 hours before the alert went out and 131 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
- 381 J/kg
- Mixed-layer CIN
- -66 J/kg
- Mixed-layer LCL
- 702 m above ground
- 0-6 km bulk shear
- 13 kt
- 0-1 km storm-relative helicity
- -29 m²/s²
- 0-3 km storm-relative helicity
- -34 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted.
421
WGUS53 KOAX 252140
FFWOAX
NEC027-179-260045-
/O.NEW.KOAX.FF.W.0006.210625T2140Z-210626T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
BULLETIN - EAS ACTIVATION REQUESTED
Flash Flood Warning
National Weather Service Omaha/Valley NE
440 PM CDT Fri Jun 25 2021
The National Weather Service in Omaha/Valley has issued a
* Flash Flood Warning for...
Southeastern Cedar County in northeastern Nebraska...
North Central Wayne County in northeastern Nebraska...
* Until 745 PM CDT.
* At 440 PM CDT, emergency management reported thunderstorms
producing heavy rain across the warned area. Between 2 and 3
inches of rain have fallen. Additional rainfall amounts up to 1
inch are possible in the warned area. Flash flooding is ongoing or
expected to begin shortly.
HAZARD...Flash flooding caused by thunderstorms.
SOURCE...Emergency management reported.
IMPACT...Flash flooding of small creeks and streams, urban
areas, highways, streets and underpasses as well as
other poor drainage and low-lying areas.
* Some locations that will experience flash flooding include...
Carroll and Laurel.
Emergency management indicated parts of 859th Road east of Carroll
was covered with water.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Turn around, don't drown when encountering flooded roads. Most flood
deaths occur in vehicles.
&&
LAT...LON 4240 9716 4246 9702 4234 9702 4231 9710
4224 9711 4228 9724 4235 9725
FLASH FLOOD...OBSERVED
$$
Dergan1 follow-up statement
093
WGUS73 KOAX 260040
FFSOAX
Flash Flood Statement
National Weather Service Omaha/Valley NE
740 PM CDT Fri Jun 25 2021
NEC027-179-260050-
/O.EXP.KOAX.FF.W.0006.000000T0000Z-210626T0045Z/
/00000.0.ER.000000T0000Z.000000T0000Z.000000T0000Z.OO/
Cedar NE-Wayne NE-
740 PM CDT Fri Jun 25 2021
...FLASH FLOOD WARNING WILL EXPIRE AT 745 PM CDT THIS EVENING FOR
SOUTHEASTERN CEDAR AND NORTH CENTRAL WAYNE COUNTIES...
The heavy rain has ended. Flooding is no longer expected to pose a
threat. Please continue to heed remaining road closures.
LAT...LON 4240 9716 4246 9702 4234 9702 4231 9710
4224 9711 4228 9724 4235 9725
$$
CAThe office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 24, 7:05 PM CDT | Severe Thunderstorm Warning | OAX | Pawnee, Richardson | 21 min |
| Jun 24, 7:16 PM CDT | Flash Flood Warning | OAX | Richardson | 8 hr |
| Jun 24, 9:27 PM CDT | Areal Flood Warning | OAX | Cass, Lancaster, Otoe | 13 hr |
| Jun 25, 12:58 AM CDT | River Flood Warning | OAX | Richardson | 20 hr |
| Jun 25, 1:58 AM CDT | Areal Flood Warning | OAX | Pawnee, Richardson | 32 hr |
| Jun 25, 3:45 AM CDT | Areal Flood Warning | OAX | Richardson | 30 hr |
| Jun 25, 1:23 PM CDT | Special Weather Statement | OAX | Polk | 52 min |
| Jun 25, 6:00 PM CDT | Severe Thunderstorm Warning | OAX | Thurston | 27 min |
| Jun 25, 6:39 PM CDT | Special Weather Statement | OAX | Boone | 51 min |
| Jun 25, 6:53 PM CDT | Severe Thunderstorm Warning | OAX | Boone | 52 min |
Nearby
Flash Flood Warnings in Nebraska, 2021Every flash flood warning 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.