Alert archive / Nebraska / Flash Flood Warnings in 1997
Flash Flood Warning 5, NWS Omaha, NE
NWS Omaha, NE issued this flash flood warning at Jul 7, 1997, 8:59 PM CDT for Colfax County, Dodge County, Nebraska. It was in force for 6 hr. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Jul 7, 1997, 8:59 PM CDT (01:59 UTC)
- Expired
- Jul 8, 1997, 2:55 AM CDT
- In force
- 6 hr
- Issued by
- NWS Omaha, NE
- Area
- Whole counties
Counties Colfax County, NE, Dodge County, NE
The radar
The Omaha radar (KOAX), 51 km from the middle of the area, began a volume at 02:00 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 00:00Z, 2.0 hours before the alert went out and 50 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
- 1901 J/kg
- Mixed-layer CIN
- -10 J/kg
- Mixed-layer LCL
- 1492 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 154 m²/s²
- 0-3 km storm-relative helicity
- 328 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 13.4
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KOMA 080159 FFWOMA NEC037-053-080755- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 859 PM CDT MON JUL 7 1997 * FLASH FLOOD WARNING FOR COLFAX COUNTY - IN NORTHEASTERN NEBRASKA DODGE COUNTY - IN EAST CENTRAL NEBRASKA * UNTIL 255 AM CDT * SOME STREAMS AFFECTED MAPLE CREEK * CAUSE AND EFFECT RADAR ESTIMATES INDICATE THAN MORE THAN TWO INCHES OF RAIN HAVE FALLE N IN NORTHERN AND NORTHWEST DODGE COUNTY AND THUNDERSTORMS CONTINUE TO MOVE THROUGH THE AREA. 2 INCHES OF RAIN FELL IN A SHORT TIME AT CLARKSON IN NORTHERN COLFAX COUNTY. FLOODING OF SMALL STREAMS AND ROADS IS LIKELY. IN ADDITION THE RAINFALL SHOULD BE SUFFICIENT TO BRING MAPLE CREEK TO BANKFULL WITH SOME MINOR OVERFLOWS LIKELY WHERE DEBREE OR OTHER BLOCKAGE IS OCCURRING. DO NOT DRIVE THROUGH FLOODED AREAS. SHALLOW...SWIFTLY FLOWING WATER CAN WASH A CAR FROM A ROADWAY. ALSO...THE ROADBED MAY NOT BE INTACT UNDER THE WATER. FURTHER HEAVY RAINFALL MAY CONTRIBUTE TO FURTHER RISES IN DODGE COUNTY. SOME LIGHTER RAINFALL IS LIKELY IN NORTHERN COLFAX COUNTY ALTHOUGH HEAVIER RAIN MAY OCCUR BEFORE 11 PM IN SOUTHERN COLFAX COUNTY. POWERS
What forecasters said that day
The local office's own words before this flash flood warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Jul 7, 7:55 PM CDT, 1 hour 4 minutes before
NEZ011-012-016>018-080300- SPECIAL WEATHER STATEMENT CLEARING PART OF TORNADO WATCH 580 NATIONAL WEATHER SERVICE OMAHA NE 755 PM CDT MON JUL 7 1997 ...TORNADO WATCH CANCELLED FOR COUNTIES IN NORTHEAST NEBRASKA TO THE NORTH OF NORFOLK... TORNADO WATCH NUMBER 580...ISSUED ABOUT 315 PM THIS MONDAY EVENING IS NO LONGER IN EFFECT FOR KNOX...CEDAR...ANTELOPE...PIERCE AND WAYNE COUNTIES OF NORTHEAST NEBRASKA. THE SQUALL LINE AND COLD FRONT GENERATING SEVERE WEATHER HAS PASSED TO THE SOUTHEAST OF THESE COUNTIES. TORNADO WATCH 680 REMAINS IN EFFECT FOR THE COUNTIES OF NORTHEAST NEBRASKA TO THE SOUTHEAST OF A NORFOLK TO SIOUX CITY LINE UNTIL 10 PM CDT. IN ADDITION TORNADO WATCH 581 REMAINS IN EFFECT FOR MUCH OF SOUTH CENTRAL...SOUTHEAST AND EAST CENTRAL NEBRASKA AND ADJACENT SOUTHWEST IOWA UNTIL MIDNIGHT. POWERS
Special weather statement, Jul 7, 7:57 PM CDT, 1 hour 2 minutes before
NEZ011-012-016>018-080300- SPECIAL WEATHER STATEMENT CLEARING PART OF TORNADO WATCH 580 NATIONAL WEATHER SERVICE OMAHA NE 755 PM CDT MON JUL 7 1997 ...TORNADO WATCH CANCELLED FOR COUNTIES IN NORTHEAST NEBRASKA TO THE NORTH OF NORFOLK... TORNADO WATCH NUMBER 580...ISSUED ABOUT 315 PM THIS MONDAY EVENING IS NO LONGER IN EFFECT FOR KNOX...CEDAR...ANTELOPE...PIERCE AND WAYNE COUNTIES OF NORTHEAST NEBRASKA. THE SQUALL LINE AND COLD FRONT GENERATING SEVERE WEATHER HAS PASSED TO THE SOUTHEAST OF THESE COUNTIES. TORNADO WATCH 680 REMAINS IN EFFECT FOR THE COUNTIES OF NORTHEAST NEBRASKA TO THE SOUTHEAST OF A NORFOLK TO SIOUX CITY LINE UNTIL 10 PM CDT. IN ADDITION TORNADO WATCH 581 REMAINS IN EFFECT FOR MUCH OF SOUTH CENTRAL...SOUTHEAST AND EAST CENTRAL NEBRASKA AND ADJACENT SOUTHWEST IOWA UNTIL MIDNIGHT. POWERS
The office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 7, 7:01 PM CDT | Tornado Warning | OAX | Madison | 29 min |
| Jul 7, 7:15 PM CDT | Tornado Warning | OAX | Stanton | 45 min |
| Jul 7, 7:23 PM CDT | Tornado Warning | OAX | Cuming | 47 min |
| Jul 7, 7:30 PM CDT | Severe Thunderstorm Warning | OAX | Platte | 65 min |
| Jul 7, 7:38 PM CDT | Severe Thunderstorm Warning | OAX | Colfax | 62 min |
| Jul 7, 7:55 PM CDT | Tornado Warning | OAX | Colfax | 50 min |
| Jul 7, 8:21 PM CDT | Severe Thunderstorm Warning | OAX | Dodge | 64 min |
| Jul 7, 9:18 PM CDT | Severe Thunderstorm Warning | OAX | Butler | 62 min |
| Jul 7, 9:48 PM CDT | Severe Thunderstorm Warning | OAX | Saunders | 62 min |
| Jul 7, 10:07 PM CDT | Severe Thunderstorm Warning | OAX | Douglas, Sarpy | 48 min |
| Jul 7, 10:10 PM CDT | Severe Thunderstorm Warning | OAX | Cass, Sarpy | 50 min |
Nearby
Flash Flood Warnings in Nebraska, 1997Every flash flood warning in 1997
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.