Alert archive / Nebraska / Flash Flood Warnings in 2003

Flash Flood Warning 1, NWS Sioux Falls, SD

June 9, 2003Dixon County, Nebraska

NWS Sioux Falls, SD issued this flash flood warning at Jun 9, 2003, 7:35 PM CDT for Dixon 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 9, 2003, 7:35 PM CDT (00:35 UTC)
Expired: Jun 9, 2003, 10:30 PM CDT
In force: 3 hr
Issued by: NWS Sioux Falls, SD
Area: Counties, with a storm outline in the text

County Dixon County, NE

The radar

The Sioux Falls radar (KFSD), 122 km from the middle of the area, began a volume at 00:34 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 00:00Z, 0.6 hours before the alert went out and 136 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 223 J/kg
Mixed-layer CIN: -235 J/kg
Mixed-layer LCL: 2359 m above ground
0-6 km bulk shear: 45 kt
0-1 km storm-relative helicity: 132 m²/s²
0-3 km storm-relative helicity: 272 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.2

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KFSD 100037
FFWFSD
NEC051-100330-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
735 PM CDT MON JUN 9 2003

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  DIXON COUNTY IN NORTHEAST NEBRASKA

* UNTIL 1030 PM CDT

* AT 735 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THUNDERSTORMS WERE PRODUCING VERY HEAVY RAINFALL OVER THE WARNED   
  AREA. SOME LOCATIONS COULD RECEIVE RAINFALL OF THREE TO FIVE       
  INCHES THROUGH 1030 PM CDT. THE HEAVIEST RAIN WILL LIKELY FALL IN
  THE MARTINSBURG AND AREAS JUST NORTH AND WEST.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND.

LAT...LON 4232 9701 4231 9674 4253 9674 4253 9663
          4270 9684 4274 9701

$$

08

2 follow-up statements

000 
WGUS73 KFSD 100252
FFSFSD
IAC193-NEC043-051-100445-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
952 PM CDT MON JUN 9 2003

...FLASH FLOOD WARNING CONTINUES FOR...

...DIXON COUNTY IN NORTHEAST NEBRASKA UNTIL 1030 PM CDT...
...WESTERN WOODBURY COUNTY IN NORTHWEST IOWA UNTIL 1130 PM CDT...
...DAKOTA COUNTY IN NORTHEAST NEBRASKA 1130 PM CDT...

WHILE MOST OF THE HEAVIEST RAIN HAS SHIFTED SOUTH AND EAST OF THE 
AREA...ADDITIONAL THUNDERSTORMS WILL MOVE THROUGH OVER THE NEXT 
COUPLE OF HOURS. RAINFALL RATES OF AN INCH AN HOUR WILL BE POSSIBLE 
DURING THIS TIME...WITH TOTAL RAINFALL OF THREE TO FIVE INCHES IN 
MANY LOCATIONS...ESPECIALLY OVER DIXON COUNTY.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE THE WATER COVERS THE
ROADWAY. THE WATER DEPTH MAY BE TOO GREAT TO ALLOW YOUR CAR TO CROSS
SAFELY. VEHICLES CAUGHT IN RISING WATER SHOULD BE ABANDONED QUICKLY.
MOVE TO HIGHER GROUND.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS AND FLASH FLOODS. IF FLASH FLOODING IS OBSERVED ACT
QUICKLY. MOVE UP TO HIGHER GROUND TO ESCAPE FLOOD WATERS. DO NOT STAY
IN AREAS SUBJECT TO FLOODING WHEN WATER BEGINS RISING.

$$

08

000 
WGUS73 KFSD 100335
FFSFSD
NEC051-100400-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1035 PM CDT MON JUN 9 2003

...FLASH FLOOD WARNING EXPIRED FOR...

...DIXON COUNTY IN NORTHEAST NEBRASKA...

AT 1035 PM...WIDESPREAD HEAVY RAINFALL HAS SHIFTED EAST OF DIXON 
COUNTY...AND THE FLASH FLOOD WARNING HAS BEEN ALLOWED TO EXPIRE.   
HOWEVER...ISOLATED THUNDERSTORMS WILL CONTINUE TO PRODUCE LOCALLY 
HEAVY RAINFALL OF A QUARTER TO HALF INCH THROUGH MIDNIGHT IN AREAS 
NEAR PONCA AND WATERBURY.  

USE CAUTION AND DO NOT DRIVE INTO AREAS WHERE WATER IS PONDED OVER 
ROADWAYS...AS IT IS DIFFICULT TO DETERMINE THE DEPTH OF 
WATER...ESPECIALLY AT NIGHT.

$$
CHAPMAN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 9, 7:03 PM CDT	Severe Thunderstorm Warning	FSD	Dakota	42 min
Jun 9, 7:14 PM CDT	Severe Thunderstorm Warning	FSD	Dixon	31 min
Jun 9, 7:47 PM CDT	Severe Thunderstorm Warning	FSD	Dakota	58 min
Jun 9, 8:10 PM CDT	Tornado Warning	FSD	Dakota	35 min
Jun 9, 8:20 PM CDT	Severe Thunderstorm Warning	FSD	Dixon	25 min
Jun 9, 8:38 PM CDT	Flash Flood Warning	FSD	Dakota	3 hr
Jun 9, 8:46 PM CDT	Severe Thunderstorm Warning	FSD	Dakota	59 min
Jun 9, 9:55 PM CDT	Severe Thunderstorm Warning	FSD	Dixon	50 min

Nearby

Flash Flood Warnings in Nebraska, 2003 Every flash flood warning in 2003

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.