Alert archive / Nebraska / Flash Flood Warnings in 1998
Flash Flood Warning 28, NWS Omaha, NE
NWS Omaha, NE issued this flash flood warning at Jul 5, 1998, 10:28 PM CDT for Washington 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 5, 1998, 10:28 PM CDT (03:28 UTC)
- Expired
- Jul 6, 1998, 4:25 AM CDT
- In force
- 6 hr
- Issued by
- NWS Omaha, NE
- Area
- Whole counties
County Washington County, NE
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 3.5 hours before the alert went out and 27 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
- 2793 J/kg
- Mixed-layer CIN
- -16 J/kg
- Mixed-layer LCL
- 661 m above ground
- 0-6 km bulk shear
- 35 kt
- 0-1 km storm-relative helicity
- 134 m²/s²
- 0-3 km storm-relative helicity
- 265 m²/s²
- Significant tornado parameter
- 3.3
- Supercell composite
- 14.8
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KOMA 060328 FFWOMA NEC177-060925- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 1028 PM CDT SUN JUL 5 1998 THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A * FLASH FLOOD WARNING FOR... WASHINGTON COUNTY IN EAST CENTRAL NEBRASKA * UNTIL 425 AM CDT * AT 1025 PM...HEAVY RAIN OF UP TO 2 INCHES WAS INDICATED BY NATIONAL WEATHER SERVICE DOPPLER RADAR IN NORTHWEST WASHINGTON COUNTY BETWEEN HERMAN AND HOOPER. THE STORMS CAUSING THE RAIN WERE MOVING SLOWLY SOUTHEAST. THIS WILL CAUSE ADDITIONAL FLOODING ON CREEKS AND SMALL STREAMS IN THE AREA. SOME STREAMS AFFECTED INCLUDE...BELL CREEK AND NEW YORK CREEK. DO NOT DRIVE INTO AREAS WHERE WATER COVERS TH@E ROAD. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR VEHICLE TO CROSS SAFELY. POLLACK
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 5, 5:15 PM CDT, 5 hours 13 minutes before
NEZ011-012-015>018-030>034-042>045-050>053-065>068-078-088>093- IAZ043-055-056-069-079-080-090-091-061200- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 515 PM CDT SUN JUL 5 1998 ...SEVERE WEATHER OUTLOOK FOR EASTERN NEBRASKA AND SOUTHWEST IOWA... SPOTTER ACTION... STORM SPOTTER ACTIVATION MAY BE REQUIRED TONIGHT IN PARTS OF NORTHEAST NEBRASKA AND WEST CENTRAL IOWA. DISCUSSION... A FRONTAL BOUNDARY EXTENDING FROM CENTRAL SOUTH DAKOTA ACROSS NORTHEAST NEBRASKA AND SOUTHWEST IOWA WILL CONTINUE TO MOVE SLOWLY NORTHEAST TONIGHT. SCATTERED THUNDERSTORMS WERE OCCURRING ALONG AND EAST OF THIS BOUNDRY LATE THIS AFTERNOON. A FEW STORMS MAY BECOME SEVERE THIS EVENING MANILY EAST OF A LINE FROM NELIGH TO NORFOLK TO OMAHA TO CLARINDA IN SOUTHWEST IOWA. LARGE HAIL AND DAMAGING WINDS WILL BE THE PRIMARY SEVERE WEATHER THREAT. ANY STORMS THAT DEVELOP WILL BE CAPABLE OF PRODUCING VERY HEAVY RAIN WHICH COULD CAUSE NEW FLOODING OR AGGRAVATE THE FLOODING WHICH IS ALREADY OCCURRING. FOBERT
Special weather statement, Jul 5, 5:15 PM CDT, 5 hours 13 minutes before
NEZ011-012-015>018-030>034-042>045-050>053-065>068-078-088>093- IAZ043-055-056-069-079-080-090-091-061200- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 515 PM CDT SUN JUL 5 1998 ...SEVERE WEATHER OUTLOOK FOR EASTERN NEBRASKA AND SOUTHWEST IOWA... SPOTTER ACTION... STORM SPOTTER ACTIVATION MAY BE REQUIRED TONIGHT IN PARTS OF NORTHEAST NEBRASKA AND WEST CENTRAL IOWA. DISCUSSION... A FRONTAL BOUNDARY EXTENDING FROM CENTRAL SOUTH DAKOTA ACROSS NORTHEAST NEBRASKA AND SOUTHWEST IOWA WILL CONTINUE TO MOVE SLOWLY NORTHEAST TONIGHT. SCATTERED THUNDERSTORMS WERE OCCURRING ALONG AND EAST OF THIS BOUNDRY LATE THIS AFTERNOON. A FEW STORMS MAY BECOME SEVERE THIS EVENING MANILY EAST OF A LINE FROM NELIGH TO NORFOLK TO OMAHA TO CLARINDA IN SOUTHWEST IOWA. LARGE HAIL AND DAMAGING WINDS WILL BE THE PRIMARY SEVERE WEATHER THREAT. ANY STORMS THAT DEVELOP WILL BE CAPABLE OF PRODUCING VERY HEAVY RAIN WHICH COULD CAUSE NEW FLOODING OR AGGRAVATE THE FLOODING WHICH IS ALREADY OCCURRING. FOBERT
The office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 5, 10:20 PM CDT | Severe Thunderstorm Warning | OAX | Knox | 60 min |
| Jul 5, 11:20 PM CDT | Severe Thunderstorm Warning | OAX | Knox | 45 min |
| Jul 5, 11:32 PM CDT | Severe Thunderstorm Warning | OAX | Antelope | 48 min |
| Jul 6, 3:51 PM CDT | Severe Thunderstorm Warning | OAX | Knox | 64 min |
| Jul 6, 4:27 PM CDT | Severe Thunderstorm Warning | OAX | Antelope | 63 min |
| Jul 6, 4:30 PM CDT | Severe Thunderstorm Warning | OAX | Cedar | 65 min |
| Jul 6, 4:45 PM CDT | Tornado Warning | OAX | Antelope, Knox, Pierce | 60 min |
| Jul 6, 5:07 PM CDT | Tornado Warning | OAX | Cedar | 63 min |
| Jul 6, 5:19 PM CDT | Severe Thunderstorm Warning | OAX | Boone, Madison | 61 min |
| Jul 6, 5:19 PM CDT | Severe Thunderstorm Warning | OAX | Pierce, Wayne | 61 min |
| Jul 6, 5:26 PM CDT | Severe Thunderstorm Warning | OAX | Stanton | 79 min |
| Jul 6, 5:58 PM CDT | Severe Thunderstorm Warning | OAX | Cuming, Thurston | 67 min |
| Jul 6, 5:58 PM CDT | Severe Thunderstorm Warning | OAX | Cuming, Thurston | 62 min |
| Jul 6, 6:11 PM CDT | Tornado Warning | OAX | Colfax, Platte | 64 min |
| Jul 6, 6:16 PM CDT | Severe Thunderstorm Warning | OAX | Burt | 64 min |
| Jul 6, 6:37 PM CDT | Severe Thunderstorm Warning | OAX | Dodge | 63 min |
| Jul 6, 6:59 PM CDT | Severe Thunderstorm Warning | OAX | Washington | 61 min |
Nearby
Flash Flood Warnings in Nebraska, 1998Every flash flood warning in 1998
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.