Alert archive / South Dakota / Flash Flood Warnings in 2003

Flash Flood Warning 3, NWS Aberdeen, SD

May 3, 2003Dewey County, South Dakota

NWS Aberdeen, SD issued this flash flood warning at May 3, 2003, 7:35 PM MDT for Dewey County, South Dakota. 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 counties it named.

The facts

Issued: May 3, 2003, 7:35 PM MDT (01:35 UTC)
Expired: May 3, 2003, 10:30 PM MDT
In force: 3 hr
Issued by: NWS Aberdeen, SD
Area: Whole counties

County Dewey County, SD

The radar

The Bismarck radar (KBIS), 180 km from the middle of the area, began a volume at 01:38 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

Bismarck Municip, ND (KBIS), launched 00:00Z, 1.6 hours before the alert went out and 180 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: 666 J/kg
Mixed-layer CIN: -8 J/kg
Mixed-layer LCL: 1547 m above ground
0-6 km bulk shear: 30 kt
0-1 km storm-relative helicity: 5 m²/s²
0-3 km storm-relative helicity: 69 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.4

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KABR 040135
FFWABR
SDC041-040430-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ABERDEEN SD
735 PM MDT SAT MAY 3 2003

THE NATIONAL WEATHER SERVICE IN ABERDEEN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  DEWEY COUNTY IN SOUTH DAKOTA

* UNTIL 1030 PM MDT

* AT 735 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  VERY HEAVY RAINFALL WAS OCCURRING OVER THE WARNED AREA.

DO NOT DRIVE YOUR VEHICLE INTO AREAS WHERE WATER COVERS THE ROAD.
NEARLY HALF OF ALL FLOOD FATALITIES ARE VEHICLE RELATED.

BE ESPECIALLY CAUTIOUS AT NIGHT WHEN IT IS HARDER TO RECOGNIZE THE
DANGERS OF FLOODS OR FLASH FLOODS. IF FLASH FLOODING OCCURS...ACT
QUICKLY...MOVE TO HIGHER GROUND.

$$
DORN

2 follow-up statements

780 
RWUS32 KABR 040303
FFSABR
SDC041-040430-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ABERDEEN SD
900 PM MDT SAT MAY 3 2003

...FLASH FLOOD WARNING CONTINUES FOR DEWEY COUNTY UNTIL 1030 PM 
MDT...

LIGHT TO MODERATE RAINFALL CONTINUED TO FALL OVER THE WARNING AREA. 
THE RAIN IS EXPECTED TO TAPER OFF IN INTENSITY AS THE EVENING WEARS 
ON. THE AREA OF MOST CONCERN IS FAR SOUTHEASTERN DEWEY COUNTY...NEAR 
THE MISSOUR RIVER.

DO NOT DRIVE ACROSS FLOODED ROADS. FLOODED ROADS ARE EXTREMELY 
DIFFICULT TO DETECT DURING THE NIGHT.

STAY TUNED TO NOAA WEATHER RADIO OR LOCAL MEDIA OUTLETS FOR LATER 
STATEMENTS AND POSSIBLE WARNINGS.

$$
HINTZ

838 
RWUS32 KABR 040423
FFSABR
SDC041-040430-

FLASH FLOOD STATEMENT
NATIONAL WEATHER SERVICE ABERDEEN SD
1022 PM MDT SAT MAY 3 2003

...THE FLASH FLOOD WARNING WARNING FOR DEWEY COUNTY HAS BEEN
CANCELLED...

ALTHOUGH AREAS OF LIGHT RAIN STILL PERSIST OVER EASTERN DEWEY 
COUNTY...THE THREAT OF HEAVY RAIN HAS PASSED...THUS LOWERING THE 
FLASH FLOOD POTENTIAL.

THERE STILL MAY BE ROADS THAT ARE IMPASSABLE DUE TO HIGH WATER. DO 
NOT DRIVE ACROSS FLOODED ROADS OR DRIVE AROUND BARRICADES THAT ARE 
IN PLACE DUE TO ROAD CLOSURE.

$$
HINTZ

The office that day

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

Issued	Product	Office	Counties	Lasted
May 3, 6:27 PM MDT	Severe Thunderstorm Warning	ABR	Dewey	48 min
May 3, 6:45 PM MDT	Flash Flood Warning	ABR	Edmunds, Potter, Walworth	3 hr
May 4, 3:40 PM MDT	Severe Thunderstorm Warning	ABR	Hughes, Stanley	50 min
May 4, 3:50 PM MDT	Severe Thunderstorm Warning	ABR	Jones, Lyman	40 min
May 4, 4:04 PM MDT	Tornado Warning	ABR	Jones	26 min
May 4, 4:20 PM MDT	Severe Thunderstorm Warning	ABR	Stanley	40 min

Nearby

Flash Flood Warnings in South Dakota, 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.