Alert archive / South Dakota / Flash Flood Warnings in 2001

Flash Flood Warning 8, NWS Aberdeen, SD

July 19, 2001Edmunds County, South Dakota

NWS Aberdeen, SD issued this flash flood warning at Jul 19, 2001, 7:21 PM CDT for Edmunds County, South Dakota. 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: Jul 19, 2001, 7:21 PM CDT (00:21 UTC)
Expired: Jul 19, 2001, 11:15 PM CDT
In force: 4 hr
Issued by: NWS Aberdeen, SD
Area: Whole counties

County Edmunds County, SD

The radar

The Aberdeen radar (KABR), 63 km from the middle of the area, began a volume at 00:23 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

Aberdeen, SD (KABR), launched 00:00Z, 0.4 hours before the alert went out and 86 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: 4721 J/kg
Mixed-layer CIN: -25 J/kg
Mixed-layer LCL: 1120 m above ground
0-6 km bulk shear: 26 kt
0-1 km storm-relative helicity: 61 m²/s²
0-3 km storm-relative helicity: 78 m²/s²
Significant tornado parameter: 0.9
Supercell composite: 5.8

Open this sounding in Storm Lab

The text

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

000 
WGUS53 KABR 200025
FFWABR
SDC045-200415-

BULLETIN - EAS ACTIVATION REQUESTED
FLASH FLOOD WARNING
NATIONAL WEATHER SERVICE ABERDEEN SD
721 PM CDT THU JUL 19 2001

THE NATIONAL WEATHER SERVICE IN ABERDEEN HAS ISSUED A

* FLASH FLOOD WARNING FOR...
  SOUTHWEST EDMUNDS COUNTY IN NORTH CENTRAL SOUTH DAKOTA

* UNTIL 1115 PM CDT

* AT 721 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  THUNDERSTORMS WERE PRODUCING VERY HEAVY RAINFALL OVER THE WARNED   
  AREA. THIS STORM IS IN THE SAME LOCATION AS THE STORM THAT         
  PRODUCED HEAVY RAINFALL YESTERDAY.  CURRENT RADAR ESTIMATES
  SHOW OVER 3 INCHES OVER THE PAST HOUR.

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.

$$

KEARNS

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.

NWS Aberdeen, SD wrote its last area forecast discussion before this flash flood warning went out at Jul 19, 3:40 PM CDT, 3 hours 41 minutes earlier.

Area forecast discussion, Jul 19, 3:40 PM CDT, 3 hours 41 minutes before

AREA FORECAST DISCUSSION FOR CENTRAL/NORTHCENTRAL AND NORTHEAST
SOUTH DAKOTA AND WEST CENTRAL MINNESOTA
NATIONAL WEATHER SERVICE ABERDEEN SD
300 PM CDT THU JUL 19 2001

LOOKS LIKE ANOTHER INTERESTING NIGHT ON TAP.  FOCUS FOR THIS PACKAGE
IS CONVECTION CHANCES AND EXTENT TONIGHT.  MODELS HAVING SOME
TROUBLE RESOLVING DETAILS.  SEVERAL THINGS ARE GIVEN...UPPER RIDGE
AXIS CURRENTLY OVER CENTRAL SOUTH DAKOTA.  MINOR WAVES ARE RIDING
THE WEST SIDE OF THIS FLOW.  WATER VAPOR SHOWS MINOR DISTURBANCE
CURRENTLY OVER WESTERN SOUTH DAKOTA.  VISIBLE SATELLITE SHOWING
CLOUDS FORMING IN THIS AREA.  THIS AREA HAS BOUNDARY LAYER LIFTED
INDEX VALUES OF -8.  CAPE VALUES ARE GREATER THAN 3K J/KG.
DEWPOINTS ARE NOT AS HIGH AS YESTERDAY BUT STILL IN THE 70S F.  LOW
LEVEL JET GETS ORGANIZED LATER TONIGHT AND FEEDS LIKELY AREA OF
CONVECTION.  WITH THUNDERSTORMS STARTING NOW IN THE WEST PART OF THE
AREA EXPECT STORMS TO CONTINUE THIS EVENING.  AGREE WITH SPC
DISCUSSION ABOUT STORMS LIKELY FORMING MCS THAT WILL FOLLOW THE
RIDGE TONIGHT.  WILL PUT IN ANOTHER CHANCE OF STORMS SATURDAY NIGHT
AS ANOTHER MID LEVEL WAVE MOVES OVER THE AREA.

.EXTENDED DISCUSSION...
THE STRONG UPPER RIDGE THAT HAS PLAGUED THE REGION WILL CONTINUE TO
DO SO THROUGH THE EXTENDED PERIOD. H5 HEIGHTS LOWER SOME ON THE
NORTH SIDE OF THE RIDGE DURING THE MID PART OF THE WEEK AS A SERIES
OF SHORTWAVES RIDES OVER THE RIDGE AND ACROSS THE NORTHERN PLAINS.
AT THIS TIME...IT APPEARS THE STRONGEST WAVES WILL TRACK THROUGH ON
TUESDAY AND WEDNESDAY...AT THE SAME TIME THAT A STATIONARY FRONT
SETS UP ACROSS SOUTHERN SOUTH DAKOTA AND NORTHERN NEBRASKA. HIGH
PRESSURE MOVES INTO 4THE AREA FOR THE LATTER PART OF THE WEEK. WILL
SEE SOME SLIGHT MODERATING TO THE TEMPS AS THE UPPER RIDGE DAMPENS
SOME...BUT EXPECT TEMPS TO STILL REMAIN NEAR OR ABOVE NORMAL.

.ABR...NONE.

KEEFE/PARKIN

In the hours before

Local storm report, Jul 19, 5:37 PM CDT, 1 hour 44 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN, SD
537 PM CDT THU JUL 19 2001

TIME(CDT)  .....CITY LOCATION.....STATE   ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0855 PM    4.5 NE TOLSTOY            SD   TORNADO
07/18/01   EDMUNDS                        TORNADO DAMAGED A HOUSE
                                          AND SEVERAL OUTBUILDINGS

0910 PM    5 NW ONAKA                SD   TORNADO
07/18/01   FAULK                          REPORTED BY  PUBLIC

0855 PM    5 E HOVEN                 SD   TORNADO
07/18/01   POTTER

0903 PM    5 E HOVEN                 SD   2.75 INCH HAIL
07/18/01   POTTER                         IN EXTREME NE CORNER OF
                                          COUNTY

0915 PM    13 NW LOYALTON            SD   1.00 INCH HAIL
07/18/01   EDMUNDS

0919 PM    4 NW ONAKA                SD   TORNADO
07/18/01   FAULK

0915 PM    4 NE TOLSTOY              SD   1.75 INCH HAIL
07/18/01   POTTER

1030 PM    13 S BOWDLE               SD   1.00 INCH HAIL
07/18/01   EDMUNDS

1030 PM    4 NW ONAKA                SD   FLOOD
07/18/01   FAULK                          FLOODING OF COUNTY ROADS

1154 PM    KELDRON                   SD   60 MPH TSTM WIND GUST
07/18/01   CORSON

0150 AM    9W MOUND CITY             SD   60 MPH TSTM WIND GUST
07/19/01   CAMPBELL

1207 AM    3 SW MCINTOSH             SD   1.00 INCH HAIL
07/19/01   CORSON

1207 AM    3 SW MCINTOSH             SD   58 MPH TSTM WIND GUST
07/19/01   CORSON

0230 AM    10 NE MOUND CITY          SD   60 MPH TSTM WIND GUST
07/19/01   CAMPBELL

0335 AM    7 E LEOLA                 SD   60-70 MPH TSTM WIND GUST
07/19/01   MCPHERSON

0457 AM    REDFIELD                  SD   1.00 INCH HAIL
07/19/01   SPINK                          IN AND AROUND TOWN

1215 AM    1 SW MCINTOSH             SD   75 MPH TSTM WIND GUST
07/19/01   CORSON                         REPORTED BY SPOTTER

1235 AM    MCLAUGHLIN                SD   70 MPH TSTM WIND GUST
07/19/01   CORSON                         LAW ENFORCEMENT REPORTED
                                          SMALL TREES DOWN

1235 AM    MCLAUGHLIN                SD   1.00 INCH HAIL
07/19/01   CORSON                         LAW ENFORCEMENT REPORTED
                                          MOST WINDOWS OUT IN TOWN
                                          AND CARS

GS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 19, 7:31 PM CDT	Severe Thunderstorm Warning	ABR	Edmunds, Faulk	59 min
Jul 19, 8:42 PM CDT	Severe Thunderstorm Warning	ABR	Dewey	33 min
Jul 19, 9:15 PM CDT	Severe Thunderstorm Warning	ABR	Corson, Dewey	45 min
Jul 19, 9:49 PM CDT	Severe Thunderstorm Warning	ABR	Corson	56 min
Jul 19, 11:32 PM CDT	Severe Thunderstorm Warning	ABR	Edmunds	28 min
Jul 20, 12:13 AM CDT	Severe Thunderstorm Warning	ABR	Dewey	62 min
Jul 20, 2:52 AM CDT	Severe Thunderstorm Warning	ABR	Corson	23 min
Jul 20, 3:55 AM CDT	Severe Thunderstorm Warning	ABR	Campbell, Corson, Walworth	50 min
Jul 20, 4:20 AM CDT	Severe Thunderstorm Warning	ABR	Marshall, Roberts	55 min
Jul 20, 4:40 AM CDT	Severe Thunderstorm Warning	ABR	Campbell, Walworth	50 min
Jul 20, 4:57 AM CDT	Severe Thunderstorm Warning	ABR	Edmunds, McPherson	48 min
Jul 20, 5:07 AM CDT	Severe Thunderstorm Warning	ABR	Roberts	38 min
Jul 20, 5:39 AM CDT	Severe Thunderstorm Warning	ABR	Faulk	51 min
Jul 20, 5:45 AM CDT	Severe Thunderstorm Warning	ABR	Edmunds, McPherson	45 min
Jul 20, 6:22 AM CDT	Severe Thunderstorm Warning	ABR	Brown	38 min
Jul 20, 6:59 AM CDT	Severe Thunderstorm Warning	ABR	Brown	46 min
Jul 20, 7:03 AM CDT	Severe Thunderstorm Warning	ABR	Hand, Spink	27 min
Jul 20, 7:34 AM CDT	Severe Thunderstorm Warning	ABR	Hand	11 min
Jul 20, 7:37 AM CDT	Severe Thunderstorm Warning	ABR	Day, Marshall	38 min
Jul 20, 8:03 AM CDT	Severe Thunderstorm Warning	ABR	Spink	27 min
Jul 20, 9:36 AM CDT	Severe Thunderstorm Warning	ABR	Clark, Codington	39 min

Nearby

Flash Flood Warnings in South Dakota, 2001 Every flash flood warning in 2001

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.