Alert archive / Nebraska / Flash Flood Warnings in 1998
Flash Flood Warning 32, NWS Omaha, NE
NWS Omaha, NE issued this flash flood warning at Aug 21, 1998, 6:05 AM CDT for Saunders County, Nebraska. It was in force for 4 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
- Aug 21, 1998, 6:05 AM CDT (11:05 UTC)
- Expired
- Aug 21, 1998, 10:00 AM CDT
- In force
- 4 hr
- Issued by
- NWS Omaha, NE
- Area
- Whole counties
County Saunders County, NE
The radar
The Omaha radar (KOAX), 25 km from the middle of the area, began a volume at 11:04 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
Topeka, KS (KTOP), launched 00:00Z, 11.1 hours before the alert went out and 262 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
- 1580 J/kg
- Mixed-layer CIN
- -28 J/kg
- Mixed-layer LCL
- 1726 m above ground
- 0-6 km bulk shear
- 19 kt
- 0-1 km storm-relative helicity
- 21 m²/s²
- 0-3 km storm-relative helicity
- 78 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.2
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KOMA 211107 FFWOMA NEC155-211500- BULLETIN - EAS ACTIVATION REQUESTED FLASH FLOOD WARNING NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 605 AM CDT FRI AUG 21 1998 THE NATIONAL WEATHER SERVICE IN OMAHA HAS ISSUED A * FLASH FLOOD WARNING FOR... SAUNDERS COUNTY IN EAST CENTRAL NEBRASKA * UNTIL 1000 AM CDT * AT 605 AM CDT...RADAR INDICATED THAT THREE TO FIVE INCHES OF RAIN HAD OCCURRED ACROSS MUCH OF SAUNDERS COUNTY DURING THE NIGHT. MORE THUNDERSTORMS WILL BE SCATTERED ACROSS THE AREA EARLY THIS MORNING...SO EVEN MORE RAIN IS POSSIBLE. SOME STREAMS AFFECTED INCLUDE...WAHOO CREEK...SAND CREEK...SILVER CREEK. DO NOT DRIVE ACROSS FLOODED ROADS. MOST FLASH FLOOD DEATHS OCCUR IN AUTOMOBILES. IF YONUR VEHICLE STALLS...ABANDON IT IMMEDIATELY AND SEEK HIGHER GROUND. MILLER
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
Local storm report, Aug 21, 4:14 AM CDT, 1 hour 51 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
414 AM CDT FRI AUG 21 1998
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1155 PM OFFUTT AFB NE 84 MPH TSTM GUST
08/20/98 SARPY
1201 AM OFFUTT AFB NE 57 MPH TSTM GUST
08/21/98 SARPYLocal storm report, Aug 21, 4:14 AM CDT, 1 hour 51 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE OMAHA/VALLEY NE
414 AM CDT FRI AUG 21 1998
TIME(CDT) .....CITY LOCATION..... STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1155 PM OFFUTT AFB NE 84 MPH TSTM GUST
08/20/98 SARPY
1201 AM OFFUTT AFB NE 57 MPH TSTM GUST
08/21/98 SARPYSpecial weather statement, Aug 21, 5:10 AM CDT, 55 minutes before
NEZ011-012-015>018-030>034-042>045-050>053-065>068-078-088>093- IAZ043-055-056-069-079-080-090-091-221200- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 510 AM CDT FRI AUG 21 1998 ...SEVERE WEATHER OUTLOOK FOR EASTERN NEBRASKA AND SOUTHWEST IOWA... SPOTTER ACTION... STORM SPOTTER ACTIVATION MAY BE NEEDED IN PARTS OF NORTHEAST NEBRASKA TODAY...BUT IT WILL PROBABLY NOT BE NEED OVER THE REMAINDER OF EASTERN NEBRASKA AND SOUTHWEST IOWA TODAY OR TONIGHT. DISCUSSION... A FRONT EXTENDS FROM EAST TO WEST THROUGH THE AREA. SHOWERS AND THUNDERSTORMS WILL BE WIDESPREAD ACROSS A LARGE PART OF EASTERN NEBRASKA AND SOUTHWEST IOWA THROUGH THE MORNING. THE GREATEST THREAT FROM THESE STORMS IS HEAVY RAIN...WHICH COULD CAUSE FLOODING. A FEW STORMS COULD PRODUCE STRONG WINDS AND HAIL. > STORMS SHOULD DECREASE IN COVERAGE THIS AFTERNOON...BUT MAY REDEVELOP NEAR THE FRONT TOWARD EVENING AS THE FRONT LIFTS BACK NORTH. MILLER
Special weather statement, Aug 21, 5:10 AM CDT, 55 minutes before
NEZ011-012-015>018-030>034-042>045-050>053-065>068-078-088>093- IAZ043-055-056-069-079-080-090-091-221200- SEVERE WEATHER OUTLOOK NATIONAL WEATHER SERVICE OMAHA/VALLEY NE 510 AM CDT FRI AUG 21 1998 ...SEVERE WEATHER OUTLOOK FOR EASTERN NEBRASKA AND SOUTHWEST IOWA... SPOTTER ACTION... STORM SPOTTER ACTIVATION MAY BE NEEDED IN PARTS OF NORTHEAST NEBRASKA TODAY...BUT IT WILL PROBABLY NOT BE NEED OVER THE REMAINDER OF EASTERN NEBRASKA AND SOUTHWEST IOWA TODAY OR TONIGHT. DISCUSSION... A FRONT EXTENDS FROM EAST TO WEST THROUGH THE AREA. SHOWERS AND THUNDERSTORMS WILL BE WIDESPREAD ACROSS A LARGE PART OF EASTERN NEBRASKA AND SOUTHWEST IOWA THROUGH THE MORNING. THE GREATEST THREAT FROM THESE STORMS IS HEAVY RAIN...WHICH COULD CAUSE FLOODING. A FEW STORMS COULD PRODUCE STRONG WINDS AND HAIL. > STORMS SHOULD DECREASE IN COVERAGE THIS AFTERNOON...BUT MAY REDEVELOP NEAR THE FRONT TOWARD EVENING AS THE FRONT LIFTS BACK NORTH. MILLER
The office that day
Everything else NWS Omaha, NE issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 20, 7:29 PM CDT | Severe Thunderstorm Warning | OAX | Cass, Douglas, Sarpy, Saunders | 61 min |
| Aug 20, 7:42 PM CDT | Severe Thunderstorm Warning | OAX | Dodge, Washington | 63 min |
| Aug 20, 11:46 PM CDT | Flash Flood Warning | OAX | Sarpy, Saunders | 4 hr |
| Aug 20, 11:59 PM CDT | Severe Thunderstorm Warning | OAX | Sarpy | 46 min |
| Aug 21, 12:53 AM CDT | Severe Thunderstorm Warning | OAX | Saunders | 62 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; radar from the NEXRAD Level II archive.