Alert archive / South Dakota / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 132, NWS Aberdeen, SD
NWS Aberdeen, SD issued this severe thunderstorm warning at Jul 21, 2012, 12:07 AM CDT for Hughes County, Stanley County, Sully 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
- Jul 21, 2012, 12:07 AM CDT (05:07 UTC)
- Expired
- Jul 21, 2012, 12:45 AM CDT
- In force
- 38 min
- Issued by
- NWS Aberdeen, SD
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 70.0 mph
Counties Hughes County, SD, Stanley County, SD, Sully County, SD
The radar
The Rapid City radar (KUDX), 184 km from the middle of the area, began a volume at 05:08 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 21, 12:10 AM CDT | TSTM WND DMG | 9 E Hayes, SD | THE ROOF WAS TAKEN OFF A TRAILER HOME. A QUONSET WAS SEVERELY DAMAGED WITH SOME OF THE STEEL FROM THE QUONSET WRAPPED AROUND A TREE AND SPREAD A QUARTER MILE INTO THE PASTURE. A BARN DOOR WAS ALSO TAKEN OFF. |
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 3 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, 5.1 hours before the alert went out and 178 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.
- Mixed-layer CAPE
- 3969 J/kg
- Mixed-layer CIN
- -61 J/kg
- Mixed-layer LCL
- 1604 m above ground
- 0-6 km bulk shear
- 33 kt
- 0-1 km storm-relative helicity
- 69 m²/s²
- 0-3 km storm-relative helicity
- 141 m²/s²
- Significant tornado parameter
- 0.7
- Supercell composite
- 12.6
The text
As transmitted, in the capitals the NWS used until 2016.
089 WUUS53 KABR 210507 SVRABR SDC065-117-119-210545- /O.NEW.KABR.SV.W.0132.120721T0507Z-120721T0545Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE ABERDEEN SD 1107 PM MDT FRI JUL 20 2012 THE NATIONAL WEATHER SERVICE IN ABERDEEN HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHWESTERN HUGHES COUNTY IN CENTRAL SOUTH DAKOTA... CENTRAL STANLEY COUNTY IN CENTRAL SOUTH DAKOTA... SOUTHWESTERN SULLY COUNTY IN CENTRAL SOUTH DAKOTA... * UNTIL 1145 PM MDT/1245 AM CDT/ * AT 1102 PM MDT...THE PUBLIC REPORTED A SEVERE THUNDERSTORM PRODUCING DESTRUCTIVE WINDS IN EXCESS OF 70 MPH. THIS STORM WAS LOCATED 6 MILES WEST OF CHANTLER CREEK REC AREA...OR 19 MILES WEST OF FORT PIERRE...MOVING EAST NORTHEAST AT 45 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... CHANTLER CREEK REC AREA AROUND 1110 PM MDT... OAHE MISSION REC AREA AROUND 1215 AM CDT... SPRING CREEK REC AREA...WEST SHORE REC AREA AND COW CREEK REC AREA AROUND 1220 AM CDT... OVERLOOK REC AREA...OKOBOJO CREEK REC AREA AND SULLY BUTTES AROUND 1225 AM CDT... GREY GOOSE AROUND 1230 AM CDT... THIS WARNING INCLUDES HIGHWAY 14 BETWEEN MILE MARKERS 202 AND 237. PRECAUTIONARY/PREPAREDNESS ACTIONS... TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE IN ABERDEEN. && LAT...LON 4474 10048 4442 10020 4429 10082 4451 10097 TIME...MOT...LOC 0505Z 253DEG 38KT 4446 10070 WIND...HAIL 70MPH <.75IN $$ CONNELLY
2 follow-up statements
622
WWUS53 KABR 210530
SVSABR
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ABERDEEN SD
1230 AM CDT SAT JUL 21 2012
SDC117-210540-
/O.CAN.KABR.SV.W.0132.000000T0000Z-120721T0545Z/
STANLEY SD-
1130 PM MDT FRI JUL 20 2012
...THE SEVERE THUNDERSTORM WARNING FOR CENTRAL STANLEY COUNTY IS
CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED OR MOVED OUT OF THE
WARNED AREA.
TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN ABERDEEN.
LAT...LON 4466 10041 4448 10026 4444 10039 4446 10042
4445 10056 4446 10058 4449 10058 4452 10052
4454 10052 4455 10059 4458 10062
TIME...MOT...LOC 0530Z 253DEG 38KT 4454 10035
$$
SDC065-119-210545-
/O.CON.KABR.SV.W.0132.000000T0000Z-120721T0545Z/
SULLY SD-HUGHES SD-
1230 AM CDT SAT JUL 21 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTHWESTERN
HUGHES AND SOUTHWESTERN SULLY COUNTIES UNTIL 1245 AM CDT/1145 PM
MDT/...
AT 1229 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
SEVERE THUNDERSTORM CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF
60 MPH. THIS STORM WAS LOCATED NEAR GREY GOOSE...OR 11 MILES NORTH
OF PIERRE...MOVING EAST NORTHEAST AT 45 MPH.
THIS SEVERE THUNDERSTORM WILL AFFECT MAINLY RURAL AREAS OF
NORTHWESTERN HUGHES AND SOUTHWESTERN SULLY COUNTIES.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
TO REPORT SEVERE WEATHER...CONTACT YOUR NEAREST LAW ENFORCEMENT
AGENCY. THEY WILL RELAY YOUR REPORT TO THE NATIONAL WEATHER SERVICE
IN ABERDEEN.
&&
LAT...LON 4466 10041 4448 10026 4444 10039 4446 10042
4445 10056 4446 10058 4449 10058 4452 10052
4454 10052 4455 10059 4458 10062
TIME...MOT...LOC 0530Z 253DEG 38KT 4454 10035
WIND...HAIL 60MPH <.75IN
$$
CONNELLY030
WWUS53 KABR 210540
SVSABR
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE ABERDEEN SD
1240 AM CDT SAT JUL 21 2012
SDC065-119-210550-
/O.EXP.KABR.SV.W.0132.000000T0000Z-120721T0545Z/
SULLY SD-HUGHES SD-
1240 AM CDT SAT JUL 21 2012
...THE SEVERE THUNDERSTORM WARNING FOR NORTHWESTERN HUGHES AND
SOUTHWESTERN SULLY COUNTIES WILL EXPIRE AT 1245 AM CDT/1145 PM
MDT/...
THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE
LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY.
LAT...LON 4466 10041 4448 10026 4444 10039 4446 10042
4445 10056 4446 10058 4449 10058 4452 10052
4454 10052 4455 10059 4458 10062
TIME...MOT...LOC 0540Z 253DEG 38KT 4457 10021
$$
CONNELLYWhat 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 Aberdeen, SD wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 20, 9:29 PM CDT, 2 hours 38 minutes earlier.
Area forecast discussion, Jul 20, 9:29 PM CDT, 2 hours 38 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE ABERDEEN SD
929 PM CDT FRI JUL 20 2012
.UPDATE...
UPDATE TO CLOSE THE BOOK ON OUR HEAT ADVISORY. OTHER FORECAST
ELEMENTS REMAIN IN PLACE. CONVECTIVE CLUSTER IS MOVING OUT OF THE
CWA NOW...HOWEVER STILL ANTICIPATE SCATTERED REDEVELOPMENT THROUGH THE
OVERNIGHT WITH WEAK LOW LEVEL JET AND MINOR SHORT WAVE ACTING AS A
FORCING MECHANISMS.
&&
.PREVIOUS DISCUSSION...
.SHORT TERM...TONIGHT THROUGH SUNDAY NIGHT
A RATHER COMPLEX FORECAST IS EXPECTED DURING THE SHORT TERM AS
MODELS DISAGREE WITH THEIR HANDLING OF CONVECTION. OVERALL FORECASTER
CONFIDENCE WITH REGARD TO PCPN IS LOW.
AS OF 19Z...A SURFACE COLD FRONT IS DRAPED ACROSS THE REGION FROM
NORTHERN MN...SOUTHWEST TO NORTHWEST SD. THIS FRONTAL
BOUNDARY...ALONG WITH AN UPPER SHORT WAVE TROUGH MOVING ACROSS THE
AREA TONIGHT WILL BRING A DECENT CHANCE FOR SHOWERS AND
THUNDERSTORMS. MUCH LIKE LAST NIGHT...SOME THUNDERSTORMS MAY
PRODUCE BRIEF HEAVY RAINFALL. WILL IGNORE THE GFS QPF VALUES OF
TWO PLUS INCHES BETWEEN 6-12Z TONIGHT. AMOUNTS BETWEEN 0.25 - 0.50
INCHES SEEMS MORE REALISTIC. THAT SAID...THESE AMOUNTS WILL LIKELY
BE CONFINED IN A NARROW EAST/WEST CORRIDOR. AND MUCH LIKE THIS
MORNING...BELIEVE CONVECTION WILL CONTINUE THE EASTERN CWA BEYOND
12Z SATURDAY.
MODELS LACK AGREEMENT BEYOND SATURDAY WHICH LEADS A LOW
FORECASTER CONFIDENCE. BOTH THE NAM/GFS SHOWS LLJ INDUCED
CONVECTION IN THE SE CWA FOR SATURDAY NIGHT WITH LITTLE
DEVELOPMENT IN THE WESTERN CWA. DID INCREASE POPS IN THE SE CWA
BUT LEFT POPS ALONE FOR THE REST OF THE CWA. WHEN LOOKING AT THE
NAM12...SUNDAY SHOULD BE DRY EVEN WITH A COLD FRONT SLIDING
THROUGH THE REGION. THE GFS ON THE OTHER HAND DEVELOPS CONVECTION
ALONG THE COLD FRONT AS IT SLIDES SOUTHWARD ACROSS THE NORTHERN
HALF OF THE CWA. WITH THE GFS BEING THE ODD MODEL OUT...WILL USE
THE NAM AND KEEP THE CWA DRY.
.LONG TERM...MONDAY THROUGH FRIDAY
A STRONG MID LEVEL RIDGE OVER THE CENTRAL CONUS GRADUALLY
DE-AMPLIFIES THROUGH THE PERIOD AS S/W ENERGY TRAVERSES THE TOP OF
THE RIDGE. WITH LOWERING HEIGHTS...COOLING MID LEVEL TEMPS AND A
MEAN SFC FRONTAL BOUNDARY IN THE AREA...THERE WILL CONTINUE TO BE
CHANCES FOR MAINLY DIURNAL CONVECTION. FINALLY TOWARD THE END OF
NEXT WEEK A DECENT LOOKING FRONT SHOULD MOVE THROUGH WITH A COOL
DOWN TO MORE NORMAL TEMPERATURES. BEHIND THE FRONT A DRIER AIRMASS
WILL ALSO OVERSPREAD THE AREA.
&&
.AVIATION...
00Z TAFS FOR THE KABR...KATY...KPIR AND KMBG TERMINALS
OVERALL VFR CONDITIONS ARE EXPECTED AT ALL TERMINALS THROUGH THE
NEXT 24 HOURS. ISOLD/SCT THUNDERSTORM COVERAGE IS POSSIBLE
THIS EVENING...OVERNIGHT...AND INTO THE EARLY MORNING
HOURS...WITH STORMS MORE LIKELY TO IMPACT THE KPIR TERMINAL IN THE
NEXT SEVERAL HOURS AFTER WHICH UNCERTAIN BECOMES TOO GREAT TO
INCLUDE AS A PREDOMINANT CONDITION IN THE KMBG/KATY/KABR TAFS.
&&
.ABR WATCHES/WARNINGS/ADVISORIES...
SD...HEAT ADVISORY UNTIL 10 PM CDT /9 PM MDT/ THIS EVENING FOR BROWN-
BUFFALO-CAMPBELL-CORSON-DEWEY-EDMUNDS-FAULK-HAND-HUGHES-
HYDE-JONES-LYMAN-MCPHERSON-POTTER-SPINK-STANLEY-SULLY-
WALWORTH.
MN...NONE.
&&
UPDATE...CONNELLY
SHORT TERM...SD
LONG TERM...TDK
AVIATION...CONNELLY
WEATHER.GOV/ABERDEENHazardous weather outlook, Jul 20, 3:28 AM CDT, 20 hours 39 minutes before
HAZARDOUS WEATHER OUTLOOK NATIONAL WEATHER SERVICE ABERDEEN SD 328 AM CDT FRI JUL 20 2012 MNZ039-046-SDZ003>011-015>023-033>037-045-048-051-210830- TRAVERSE-BIG STONE-CORSON-CAMPBELL-MCPHERSON-BROWN-MARSHALL- ROBERTS-WALWORTH-EDMUNDS-DAY-DEWEY-POTTER-FAULK-SPINK-CLARK- CODINGTON-GRANT-HAMLIN-DEUEL-STANLEY-SULLY-HUGHES-HYDE-HAND-JONES- LYMAN-BUFFALO- 328 AM CDT FRI JUL 20 2012 /228 AM MDT FRI JUL 20 2012/ THIS HAZARDOUS WEATHER OUTLOOK IS FOR PORTIONS OF WEST CENTRAL MINNESOTA...CENTRAL SOUTH DAKOTA...NORTH CENTRAL SOUTH DAKOTA AND NORTHEAST SOUTH DAKOTA. .DAY ONE...TODAY AND TONIGHT A HEAT ADVISORY REMAINS IN EFFECT FROM THE JAMES VALLEY AND WEST THROUGH 10 PM CDT. HEAT INDICES OF 100 TO 110 DEGREES ARE POSSIBLE. ISOLATED TO SCATTERED THUNDERSTORMS ACROSS PARTS OF CENTRAL AND NORTHEAST SOUTH DAKOTA WILL END THIS MORNING. NONE ARE EXPECTED TO BE SEVERE. FOR TONIGHT...ANOTHER ROUND OF SCATTERED THUNDERSTORMS IS EXPECTED TO MOVE ACROSS THE REGION. A FEW MAY BE SEVERE MAINLY WEST IN THE REGION. .DAYS TWO THROUGH SEVEN...SATURDAY THROUGH THURSDAY OFF AND ON CHANCES OF THUNDERSTORMS ARE EXPECTED THROUGH THE PERIOD. .SPOTTER INFORMATION STATEMENT... SPOTTER ACTIVATION MAY BE NEEDED TONIGHT. MOHR
In the hours before
Special weather statement, Jul 20, 7:32 PM CDT, 4 hours 35 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE ABERDEEN SD 732 PM CDT FRI JUL 20 2012 SDZ048-210100- LYMAN- 732 PM CDT FRI JUL 20 2012 ...A SIGNIFICANT WEATHER ADVISORY HAS BEEN ISSUED FOR CENTRAL LYMAN COUNTY UNTIL 800 PM CDT... AT 728 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A STRONG THUNDERSTORM 8 MILES NORTHEAST OF PRESHO...MOVING EAST AT 15 MPH. THE STORMS WILL REMAIN OVER MAINLY RURAL AREAS OF THE ADVISED COUNTY.. SMALL HAIL...AND WINDS AROUND 40 TO 50 MPH ARE EXPECTED WITH THIS STORM. PRECAUTIONARY/PREPAREDNESS ACTIONS... && CONNELLY
Local storm report, Jul 20, 7:51 PM CDT, 4 hours 16 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
751 PM CDT FRI JUL 20 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0745 PM HAIL 9 N KENNEBEC 44.03N 99.86W
07/20/2012 E0.88 INCH LYMAN SD TRAINED SPOTTER
DIME AND NICKEL HAIL FROM 740 TO 745 PM CDT.
&&
EVENT NUMBER ABR1200286
KGLocal storm report, Jul 20, 8:16 PM CDT, 3 hours 51 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
816 PM CDT FRI JUL 20 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0813 PM HAIL 1 SE WEST BEND REC AREA 44.16N 99.70W
07/20/2012 E0.70 INCH HUGHES SD PUBLIC
DIME HAIL. RAING HARD . NO WIND.
&&
EVENT NUMBER ABR1200287
KGLocal storm report, Jul 20, 8:41 PM CDT, 3 hours 26 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
841 PM CDT FRI JUL 20 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0840 PM HAIL 3 E FORT THOMPSON 44.05N 99.35W
07/20/2012 E1.50 INCH BUFFALO SD PUBLIC
HAIL A BIT SMALLER THAN GOLFBALLS.
&&
EVENT NUMBER ABR1200288
KGLocal storm report, Jul 20, 9:07 PM CDT, 3 hours before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
907 PM CDT FRI JUL 20 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
0905 PM HAIL 10 WSW GANN VALLEY 43.98N 99.17W
07/20/2012 E1.00 INCH BUFFALO SD PUBLIC
DIME TO QUARTER HAIL.
&&
EVENT NUMBER ABR1200289
KGLocal storm report, Jul 20, 11:43 PM CDT, 24 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE ABERDEEN SD
1143 PM CDT FRI JUL 20 2012
..TIME... ...EVENT... ...CITY LOCATION... ...LAT.LON...
..DATE... ....MAG.... ..COUNTY LOCATION..ST.. ...SOURCE....
..REMARKS..
1142 PM TSTM WND GST 6 SE HAYES 44.31N 100.94W
07/20/2012 E70 MPH STANLEY SD TRAINED SPOTTER
AT LEAST 70 MPH WINDS
&&
EVENT NUMBER ABR1200290
NWSThe office that day
Everything else NWS Aberdeen, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 20, 7:40 PM CDT | Severe Thunderstorm Warning | ABR | Hughes, Lyman | 35 min |
| Jul 20, 8:09 PM CDT | Severe Thunderstorm Warning | ABR | Buffalo, Hughes, Hyde, Lyman | 36 min |
| Jul 20, 8:42 PM CDT | Severe Thunderstorm Warning | ABR | Buffalo | 33 min |
| Jul 20, 11:26 PM CDT | Severe Thunderstorm Warning | ABR | Jones, Stanley | 49 min |
Nearby
Severe Thunderstorm Warnings in South Dakota, 2012Every severe thunderstorm warning in 2012
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; radar from the NEXRAD Level II archive.