Severe Thunderstorm Warning 142, NWS Aberdeen, SD

Issued

Jul 20, 2001, 5:07 AM CDT (10:07 UTC)

Expired

Jul 20, 2001, 5:45 AM CDT

In force

38 min

Issued by

NWS Aberdeen, SD

Area

Whole counties

Counties Big Stone County, MN, Traverse County, MN, Roberts County, SD

The Aberdeen radar (KABR), 142 km from the middle of the area, began a volume at 10:07 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.

595 
WUUS53 KABR 201007
SVRABR
MNC011-155-SDC109-201045-
/NEW.KABR.SV.W.0210.201007-201045/

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE ABERDEEN SD
507 AM CDT FRI JUL 20 2001

THE NATIONAL WEATHER SERVICE IN ABERDEEN HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ROBERTS COUNTY IN NORTHEAST SOUTH DAKOTA
  BIG STONE COUNTY IN WEST CENTRAL MINNESOTA
  TRAVERSE COUNTY IN WEST CENTRAL MINNESOTA

* UNTIL 545 AM CDT

* AT 507 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  LINE OF SEVERE THUNDERSTORMS FROM 4 MILES NORTH OF NEW EFFINGTON TO
  10 MILES WEST OF PEEVER...OR FROM 11 MILES SOUTH OF HANKINSON TO 13
  MILES SOUTH OF SISSETON...MOVING EAST AT 20 MPH.

* SEVERE THUNDERSTORMS WILL BE NEAR...
  PEEVER AROUND 515 AM CDT
  BROWNS VALLEY...DAKOMIN...ROSHOLT AROUND 520 AM CDT
  WILMOT AROUND 540 AM CDT
  WHITE ROCK...WHEATON...YANKEETOWN...COLLIS AROUND 545 AM CDT

THIS IS A DANGEROUS STORM. TAKE SHELTER NOW

THIS STORM HAS A HISTORY OF PRODUCING DAMAGING WIND. GO INSIDE A
STURDY BUILDING AND STAY AWAY FROM WINDOWS.

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

$$
LAT...LON 4594 9701 4540 9703 4536 9626 4602 9627

HINTZ

NWS Aberdeen, SD wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 20, 2:35 AM CDT, 2 hours 32 minutes earlier.

AREA FORECAST DISCUSSION FOR CENTRAL/NORTHCENTRAL AND NORTHEAST
SOUTH DAKOTA AND WEST CENTRAL MINNESOTA
NATIONAL WEATHER SERVICE ABERDEEN SD
235 AM CDT FRI JUL 20 2001

JUST ENOUGH DETAILS TO KEEP TRACK OF FOR THIS FCST TO MAKE IT
DIFFICULT. CURRENT CONVECTION SEEMS TO BE DUE TO SEVERAL FACTORS.
FIRST IS STRENGTH OF LOW LEVEL JET DEVELOPING OUT WEST. KUDX VAD WID
PROFILE SHOWS SPEEDS INCR IN LOWER GATES. LOOKING AT 700-500MB MEAN
VORTICITY...CONVECTION ALSO FIRING IN FAVORED POSN COMPARED TO WAVE
MOVING THROUGH WRN SD. 00Z ETA/M-ETA SHOW TSRA IN ND MAKING A RIGHT
TURN AND SLIDING SE THROUGH XTRM NERN SD. HOWEVER...AVN SHOWS
CONVECTION CONT TO MOVE NE INTO ND WITH SMALL AMT OF NVA WORKING IN.
JUDGING FROM IR SAT PIX...WOULD HAVE TO SAY THAT AVN WINS THIS
ROUND. WILL HAVE TO MENTION SOME MORNING TSRA ACROSS THE NRN TIER
GROUPS. WITH AIR MASSES VIRTUALLY UNCHANGED...HIGHS TODAY SHOULD BE
SIMILAR TO THURSDAY'S...AND TWEAKED WHERE NECESSARY. WINDS WILL BE
TOUGH...DUE IN LARGE PART TO NUMBER OF BOUNDARIES THAT ARE FLOATING
AROUND. MEAN DIRECTION SHOULD BE SE AND WILL MENTION THIS IN ZONES.
FOR TONIGHT...NEXT IN SERIES OF WAVES MOVES THROUGH IN SW FLOW.
MODELS POINT TO SOME MINOR TSRA DEVELOPING LATER THIS AFTERNOON IN
KMBG AREA...BUT REAL THREAT WILL RESIDE FURTHER WEST. EXPECT MOST
ACTIVITY TO TAKE PLACE SERN MT/SWRN ND...THEN TREND SSE OVERNIGHT
INTO CWA. AGAIN...STRENGTHENING LOW LEVEL JET PLAYS MAJOR ROLE
HERE...WITH AVN SHOWING THAT BEST VEERING TAKES PLACE FURTHER WEST.
BY TIME TSRA GETS INTO CWA...PROBABLY JUST LOOKING AT HEAVY RAIN.
MEAN PATTERN CHANGES LITTLE THROUGH FCST PERIOD...WITH WARM AND
HUMID CONDS STICKING AROUND.

.ABR...NONE.
HINTZ

In the hours before

SDZ006-007-011-018>020-022-200530-

SPECIAL WEATHER STATEMENT
NATIONAL WEATHER SERVICE ABERDEEN SD
1201 AM CDT THU JUL 19 2001

...TORNADO WATCH HAS EXPIRED...

THE TORNADO WATCH WHICH WAS IN EFFECT FOR MUCH OF NORTHEAST SOUTH
DAKOTA HAS BEEN ALLOWED TO EXPIRE.

MOHR

Severe Thunderstorm Warnings in Minnesota, 2001Severe Thunderstorm Warnings in South Dakota, 2001Every severe thunderstorm warning in 2001

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.