Alert archive / Nebraska / Flash Flood Warnings in 2000

Flash Flood Warning 8, NWS Sioux Falls, SD

June 25, 2000Union County, South Dakota; Dakota County, Dixon County, Nebraska

NWS Sioux Falls, SD issued this flash flood warning at Jun 25, 2000, 10:32 AM CDT for Union County, South Dakota; Dakota County, Dixon County, Nebraska. It was in force for 118 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jun 25, 2000, 10:32 AM CDT (15:32 UTC)
Expired
Jun 25, 2000, 12:30 PM CDT
In force
118 min
Issued by
NWS Sioux Falls, SD
Area
Whole counties

Counties Dakota County, NE, Dixon County, NE, Union County, SD

The radar

The Sioux Falls radar (KFSD), 113 km from the middle of the area, began a volume at 15:34 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, 3.5 hours before the alert went out and 142 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.

Skew-T log-pSkew-T log-p diagram, Omaha, NE at 12:00Z on 2000-06-25Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 371 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Omaha, NE at 12:00Z on 2000-06-25The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 42 square meters per square second.193958Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
371 J/kg
Mixed-layer CIN
-296 J/kg
Mixed-layer LCL
1430 m above ground
0-6 km bulk shear
17 kt
0-1 km storm-relative helicity
42 m²/s²
0-3 km storm-relative helicity
47 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.0

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

000 
WGUS53 KFSD 251533
FFWFSD
NEC043-051-SDC127-251730-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1032 AM CDT SUN JUN 25 2000

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* URBAN FLOOD WARNING FOR...
  UNION COUNTY IN SOUTHEAST SOUTH DAKOTA
  DAKOTA COUNTY IN NORTHEAST NEBRASKA
  DIXON COUNTY IN NORTHEAST NEBRASKA

* UNTIL 1230 PM CDT

* AT 1028 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THUNDERSTORMS FROM 10 MILES SOUTHEAST OF BERESFORD TO NEAR CONCORD 
  NEBRASKA MOVING EAST AT 20 MPH. 

RAINFALL AMOUNTS OF 1 TO 2 INCHES CAN BE EXPECTED WITH THESE STORMS. 
WITH THE GROUND SATURATED FROM STORMS LAST WEEK...ADDITIONAL RAINS 
WILL LIKELY CAUSE URBAN AND SMALL STREAM FLOODING. 

DO NOT TRY AND CROSS ROADS THAT ARE FLOODED AS VEHICLES CAN BE SWEPT 
AWAY BY THE STRONG UNDER CURRENTS. 

REPORT SEVERE WEATHER TO THE NEAREST LAW ENFORCEMENT AGENCY. THEY 
WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE FORECAST 
OFFICE IN SIOUX FALLS.

NNNN

The office that day

Everything else NWS Sioux Falls, SD issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jun 25, 10:50 AM CDTSevere Thunderstorm WarningFSDDixon40 min
Jun 25, 12:30 PM CDTFlash Flood WarningFSDDakota60 min
Jun 25, 12:46 PM CDTSevere Thunderstorm WarningFSDDakota29 min

Nearby

Flash Flood Warnings in Nebraska, 2000Flash Flood Warnings in South Dakota, 2000Every flash flood warning in 2000

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.