Alert archive / South Dakota / Severe Thunderstorm Warnings in 2005

Severe Thunderstorm Warning 197, NWS Sioux Falls, SD

June 21, 2005Gregory County, South Dakota

NWS Sioux Falls, SD issued this severe thunderstorm warning at Jun 21, 2005, 2:25 AM CDT for Gregory County, South Dakota. It was in force for 38 min. 1 report came from inside the area while it was in force.

The area

The outline as issued, with what was reported inside it.

The facts

Issued: Jun 21, 2005, 2:25 AM CDT (07:25 UTC)
Expired: Jun 21, 2005, 3:03 AM CDT
In force: 38 min
Issued by: NWS Sioux Falls, SD
Area: Counties, with a storm outline in the text

County Gregory County, SD

What was reported inside it

Time	Report	Where	Remark
Jun 21, 2:35 AM CDT	HAIL 1	10 S Dallas, SD

Local storm reports filed while the alert was in force, from inside its polygon or its counties.

Did it verify

Verified. The Iowa Environmental Mesonet's Cow matched one storm report to this severe thunderstorm warning; the first came 10 minutes after it went out.

Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 7.4 hours before the alert went out and 215 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: 1190 J/kg
Mixed-layer CIN: -164 J/kg
Mixed-layer LCL: 1807 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 22 m²/s²
0-3 km storm-relative helicity: 55 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 1.0

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KFSD 210726
SVRFSD
SDC053-210800-
/O.NEW.KFSD.SV.W.0197.050621T0725Z-050621T0800Z/

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE SIOUX FALLS SD
225 AM CDT TUE JUN 21 2005

THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHWESTERN GREGORY COUNTY IN SOUTH CENTRAL SOUTH DAKOTA

* UNTIL 300 AM CDT

* AT 225 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL.  THIS
  STORM WAS LOCATED 7 MILES SOUTHWEST OF DALLAS...OR ABOUT 21 MILES
  SOUTHEAST OF WINNER...MOVING SOUTHEAST AT 20 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  RURAL GREGORY COUNTY SOUTH OF GREGORY THROUGH 250 AM CDT

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

LAT...LON 4325 9953 4300 9954 4300 9924

$$

CHAPMAN

2 follow-up statements

000 
WWUS53 KFSD 210749
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
250 AM CDT TUE JUN 21 2005

SDC053-210800-
/O.CON.KFSD.SV.W.0197.000000T0000Z-050621T0800Z/
GREGORY SD-
250 AM CDT TUE JUN 21 2005

...A SEVERE THUNDERSTORM WARNING CONTINUES UNTIL 300 AM CDT FOR 
SOUTHWESTERN GREGORY COUNTY...

AT 250 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR CONTINUED TO
INDICATE A SEVERE THUNDERSTORM CAPABLE OF PRODUCING NICKEL SIZE HAIL.
 THIS STORM WAS LOCATED 15 MILES SOUTH OF DALLAS...OR ABOUT 32 MILES
NORTH OF BASSETT...MOVING SOUTHEAST AT 25 MPH.

THIS STORM WILL PRODUCE LARGE HAIL. GO INSIDE A STURDY BUILDING AND
STAY AWAY FROM WINDOWS.

LAT...LON 4325 9953 4300 9954 4300 9924

$$

CHAPMAN

000 
WWUS53 KFSD 210803
SVSFSD

SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
303 AM CDT TUE JUN 21 2005

SDC053-210813-
/O.EXP.KFSD.SV.W.0197.000000T0000Z-050621T0800Z/
GREGORY SD-
303 AM CDT TUE JUN 21 2005

...THE SEVERE THUNDERSTORM WARNING FOR SOUTHWESTERN GREGORY COUNTY 
EXPIRES AT 300 AM CDT...

THE WARNING HAS EXPIRED. THE STORM HAS EXITED THE COUNTY.

LAT...LON 4325 9953 4300 9954 4300 9924

$$

CHAPMAN

What forecasters said that day

The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.

NWS Sioux Falls, SD wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 20, 3:30 PM CDT, 10 hours 55 minutes earlier.

Area forecast discussion, Jun 20, 3:30 PM CDT, 10 hours 55 minutes before

AREA FORECAST DISCUSSION FOR SOUTHEAST SD/SOUTHWEST MN/NORTHWEST IA
NATIONAL WEATHER SERVICE SIOUX FALLS SD
330 PM CDT MON JUN 20 2005

.DISCUSSION...
ONGOING SVR WX. NO DISCUSSION.

&&

.FSD WATCHES/WARNINGS/ADVISORIES...
SD...NONE.
MN...NONE.
IA...NONE.
NE...NONE.

&&

Hazardous weather outlook, Jun 20, 1:19 PM CDT, 13 hours 6 minutes before

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE SIOUX FALLS SD
119 PM CDT MON JUN 20 2005

SDZ038>040-050-052>071-MNZ071-072-080-081-089-090-097-098-
IAZ001>003-012>014-020>022-031-032-NEZ013-014-211200-
AURORA-BEADLE-BON HOMME-BROOKINGS-BRULE-BUENA VISTA IA-
CHARLES MIX-CHEROKEE IA-CLAY-CLAY IA-COTTONWOOD MN-DAKOTA NE-
DAVISON-DICKINSON IA-DIXON NE-DOUGLAS-GREGORY-HANSON-HUTCHINSON-
IDA IA-JACKSON MN-JERAULD-KINGSBURY-LAKE-LINCOLN-LINCOLN MN-
LYON IA-LYON MN-MCCOOK-MINER-MINNEHAHA-MOODY-MURRAY MN-NOBLES MN-
OBRIEN IA-OSCEOLA IA-PIPESTONE MN-PLYMOUTH IA-ROCK MN-SANBORN-
SIOUX IA-TURNER-UNION-WOODBURY IA-YANKTON-
119 PM CDT MON JUN 20 2005

THIS HAZARDOUS WEATHER OUTLOOK IS FOR SOUTHEAST SOUTH DAKOTA...
SOUTHWEST MINNESOTA...NORTHWEST IOWA...AND NORTHEAST NEBRASKA.

.DAY ONE...TODAY AND TONIGHT

THUNDERSTORMS...
SCATTERED THUNDERSTORMS SHOULD DEVELOP ALONG A SERIES OF OUTFLOW
BOUNDARIES NORTH OF INTERSTATE 90 THIS AFTERNOON AND
EVENING...THEN PROGRESS SOUTHEAST OVER THE AREA. A FEW OF THE
STORMS COULD BECOME SEVERE WITH DAMAGING WINDS AND PENNY SIZE
HAIL AS THE PRIMARY THREAT...ESPECIALLY ALONG AND NORTH OF
INTERSTATE 90. HOWEVER...THERE IS AN ISOLATED TORNADO THREAT
ALONG ANY OF THESE BOUNDARIES THROUGH THE EARLY EVENING HOURS.

EXCESSIVE TEMPERATURES...
HEAT INDICES WILL RISE INTO THE 100 TO 105 RANGE THIS AFTERNOON
WEST OF INTERSTATE 29...AS TEMPERATURES RISE INTO THE LOWER 90S
AND DEW POINTS REMAIN IN THE 70 TO 75 RANGE.

.DAYS TWO THROUGH SEVEN...TUESDAY THROUGH SUNDAY

THERE IS STILL A CHANCE OF THUNDERSTORMS REDEVELOPING NORTH OF
INTERSTATE 90 TUESDAY AFTERNOON AND MOVING SOUTHEAST THROUGH THE
AREA TUESDAY NIGHT. A FEW OF THESE STORMS COULD ALSO BE SEVERE.

A COLD FRONT SHOULD MOVE SOUTHEAST OVER THE AREA THURSDAY
NIGHT...BRINGING A CHANCE OF THUNDERSTORMS ALONG WITH IT. A FEW
OF THESE STORMS COULD BE SEVERE.

.SPOTTER INFORMATION STATEMENT...

SPOTTER ACTIVATION WILL BE LIKELY AFTER 2 PM NORTH OF INTERSTATE
90.

&&

FOR MORE INFORMATION PLEASE VISIT OUR WEBSITE AT
WWW.CRH.NOAA.GOV/FSD. THIS INCLUDES THE GRAPHICAL HAZARDOUS
WEATHER OUTLOOK.

BT

In the hours before

Local storm report, Jun 20, 11:25 PM CDT, 3 hours before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1125 PM CDT MON JUN 20 2005

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1118 PM     HAIL             2 E LOOMIS              43.79N 98.07W
06/20/2005  0.75 INCH        DAVISON            SD   EMERGENCY MNGR

&&

GH

Local storm report, Jun 20, 11:29 PM CDT, 2 hours 56 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1129 PM CDT MON JUN 20 2005

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1118 PM     FLASH FLOOD      WORTHINGTON             43.63N 95.60W
06/20/2005                   NOBLES             MN   TRAINED SPOTTER

            HEAVY RAIN HAS CAUSED FLOODING IN LOW LYING STREETS
            AROUND THE LAKE.IT WAS ABOUT 3 FEET DEEP AT 8TH STREET
            AND 10TH AVENUE.

&&

TRM

Local storm report, Jun 20, 11:55 PM CDT, 2 hours 30 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1155 PM CDT MON JUN 20 2005

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0848 PM     HAIL             PARKER                  43.40N 97.14W
06/20/2005  0.75 INCH        TURNER             SD   TRAINED SPOTTER

            0.75 INCH HAIL LASTED 3 MINUTES.

0851 PM     HAIL             PARKER                  43.40N 97.14W
06/20/2005  1.00 INCH        TURNER             SD   AMATEUR RADIO

            QUARTER SIZED HAIL LASTED 3 MINUTES.

0910 PM     HAIL             PARKER                  43.40N 97.14W
06/20/2005  1.75 INCH        TURNER             SD   TRAINED SPOTTER

1000 PM     FLASH FLOOD      BROOKINGS               44.31N 96.79W
06/20/2005                   BROOKINGS          SD   TRAINED SPOTTER

            FLOODING IN BROOKINGS AT THE VIADUCT AND AT SEXAUR
            STREET. ALSO THERE WERE WIND GUSTS TO 56 MPH AND PEA
            SIZED HAIL.

1144 PM     HAIL             4 NW FULTON             43.77N 97.88W
06/20/2005  0.75 INCH        HANSON             SD   EMERGENCY MNGR

            INTERMITTENT THREE QUARTER INCH HAIL WAS REPORTED BETWEEN
            4 MILES NORTHWEST OF FULTON AND ALEXANDRIA.

&&

TRM

Local storm report, Jun 21, 12:33 AM CDT, 1 hour 52 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1233 AM CDT TUE JUN 21 2005

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

1145 PM     FLASH FLOOD      FLANDREAU               44.05N 96.60W
06/20/2005                   MOODY              SD   TRAINED SPOTTER

            FLOODING WAS REPORTED IN THE CITY PARK.

1219 AM     FLASH FLOOD      FLANDREAU               44.05N 96.60W
06/21/2005                   MOODY              SD   TRAINED SPOTTER

            LOCALIZED FLOODING OF CREEKS OBSERVED.

&&

TRM

Local storm report, Jun 21, 1:04 AM CDT, 1 hour 21 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
104 AM CDT TUE JUN 21 2005

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0100 AM     FLASH FLOOD      WAGNER                  43.08N 98.30W
06/21/2005                   CHARLES MIX        SD   LAW ENFORCEMENT

            6 TO 8 INCHES OF WATER WAS REPORTED ON THE STREETS OF
            WAGNER BY THE LAKES ANDES WARNING POINT.

&&

TRM

Local storm report, Jun 21, 2:00 AM CDT, 25 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
200 AM CDT TUE JUN 21 2005

..TIME...   ...EVENT...      ...CITY LOCATION...     ...LAT.LON...
..DATE...   ....MAG....      ..COUNTY LOCATION..ST.. ...SOURCE....
            ..REMARKS..

0151 AM     HAIL             KIMBALL                 43.75N 98.96W
06/21/2005  0.88 INCH        BRULE              SD   TRAINED SPOTTER

0145 AM     HAIL             GREGORY                 43.23N 99.43W
06/21/2005  0.88 INCH        GREGORY            SD   TRAINED SPOTTER

&&

PS

The office that day

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

Issued	Product	Office	Counties	Lasted
Jun 20, 7:21 PM CDT	Flash Flood Warning	FSD	Clay, Union	3 hr
Jun 20, 7:25 PM CDT	Severe Thunderstorm Warning	FSD	Union	50 min
Jun 20, 7:33 PM CDT	Severe Thunderstorm Warning	FSD	Clay	42 min
Jun 20, 8:07 PM CDT	Severe Thunderstorm Warning	FSD	Minnehaha	23 min
Jun 20, 8:11 PM CDT	Flash Flood Warning	FSD	Minnehaha	3 hr
Jun 20, 8:14 PM CDT	Flash Flood Warning	FSD	Brookings	3 hr
Jun 20, 8:15 PM CDT	Severe Thunderstorm Warning	FSD	Clay, Union	61 min
Jun 20, 8:17 PM CDT	Flash Flood Warning	FSD	Turner	3 hr
Jun 20, 8:40 PM CDT	Severe Thunderstorm Warning	FSD	Turner	65 min
Jun 20, 9:22 PM CDT	Severe Thunderstorm Warning	FSD	Brookings	42 min
Jun 20, 9:25 PM CDT	Severe Thunderstorm Warning	FSD	Gregory	50 min
Jun 20, 9:38 PM CDT	Tornado Warning	FSD	Turner	37 min
Jun 20, 9:43 PM CDT	Flash Flood Warning	FSD	Moody	2 hr
Jun 20, 9:43 PM CDT	Severe Thunderstorm Warning	FSD	Jerauld, Sanborn	62 min
Jun 20, 10:08 PM CDT	Flash Flood Warning	FSD	Clay	2 hr
Jun 20, 10:13 PM CDT	Severe Thunderstorm Warning	FSD	Sanborn	62 min
Jun 20, 10:15 PM CDT	Severe Thunderstorm Warning	FSD	Gregory	60 min
Jun 20, 10:16 PM CDT	Severe Thunderstorm Warning	FSD	Turner	29 min
Jun 20, 10:28 PM CDT	Severe Thunderstorm Warning	FSD	McCook	32 min
Jun 20, 10:31 PM CDT	Severe Thunderstorm Warning	FSD	Hanson	44 min
Jun 20, 10:39 PM CDT	Severe Thunderstorm Warning	FSD	Beadle, Jerauld	44 min
Jun 20, 10:43 PM CDT	Severe Thunderstorm Warning	FSD	Turner	32 min
Jun 20, 10:49 PM CDT	Flash Flood Warning	FSD	Bon Homme, Yankton	3 hr
Jun 20, 10:49 PM CDT	Severe Thunderstorm Warning	FSD	Bon Homme	41 min
Jun 20, 10:57 PM CDT	Flash Flood Warning	FSD	Beadle, Sanborn	2 hr
Jun 20, 11:06 PM CDT	Severe Thunderstorm Warning	FSD	Davison	24 min
Jun 20, 11:10 PM CDT	Flash Flood Warning	FSD	McCook, Minnehaha, Turner	2 hr
Jun 20, 11:10 PM CDT	Severe Thunderstorm Warning	FSD	Clay, Yankton	16 min
Jun 20, 11:15 PM CDT	Severe Thunderstorm Warning	FSD	Turner	12 min
Jun 20, 11:18 PM CDT	Severe Thunderstorm Warning	FSD	Hanson	58 min
Jun 20, 11:26 PM CDT	Flash Flood Warning	FSD	Davison, Hanson	2 hr
Jun 20, 11:28 PM CDT	Severe Thunderstorm Warning	FSD	Davison	32 min
Jun 20, 11:32 PM CDT	Severe Thunderstorm Warning	FSD	Charles Mix	47 min
Jun 20, 11:35 PM CDT	Severe Thunderstorm Warning	FSD	Bon Homme	25 min
Jun 20, 11:37 PM CDT	Flash Flood Warning	FSD	Moody	113 min
Jun 21, 12:29 AM CDT	Severe Thunderstorm Warning	FSD	Charles Mix	47 min
Jun 21, 12:56 AM CDT	Flash Flood Warning	FSD	Charles Mix	3 hr
Jun 21, 1:04 AM CDT	Severe Thunderstorm Warning	FSD	Brule	56 min
Jun 21, 1:35 AM CDT	Flash Flood Warning	FSD	Bon Homme	115 min
Jun 21, 1:35 AM CDT	Severe Thunderstorm Warning	FSD	Gregory	40 min
Jun 21, 1:58 AM CDT	Severe Thunderstorm Warning	FSD	Brule	30 min
Jun 21, 3:11 AM CDT	Flash Flood Warning	FSD	Charles Mix	3 hr

Nearby

Severe Thunderstorm Warnings in South Dakota, 2005 Every severe thunderstorm warning in 2005

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; local storm reports from the same archive; the sounding from the Mesonet's radiosonde archive.