Alert archive / South Dakota / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 4, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at Apr 15, 2012, 11:22 AM CDT for 4 counties in South Dakota. It was in force for 23 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
- Apr 15, 2012, 11:22 AM CDT (16:22 UTC)
- Expired
- Apr 15, 2012, 11:45 AM CDT
- In force
- 23 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 58.0 mph
Counties Davison County, SD, Hanson County, SD, Miner County, SD, Sanborn County, SD
The radar
The Sioux Falls radar (KFSD), 106 km from the middle of the area, began a volume at 16:22 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 |
|---|---|---|---|
| Apr 15, 11:28 AM CDT | HAIL 1 | 7 Nne Mitchell, SD | MOSTLY NICKEL SIZE BUT A FEW QUARTERS |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Aberdeen, SD (KABR), launched 12:00Z, 4.4 hours before the alert went out and 115 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 484 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 91 m²/s²
- 0-3 km storm-relative helicity
- 656 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
As transmitted, in the capitals the NWS used until 2016.
598 WUUS53 KFSD 151622 SVRFSD SDC035-061-097-111-151645- /O.NEW.KFSD.SV.W.0004.120415T1622Z-120415T1645Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 1122 AM CDT SUN APR 15 2012 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHEASTERN DAVISON COUNTY IN SOUTHEAST SOUTH DAKOTA... NORTHWESTERN HANSON COUNTY IN SOUTHEAST SOUTH DAKOTA... WEST CENTRAL MINER COUNTY IN EAST CENTRAL SOUTH DAKOTA... SOUTHEASTERN SANBORN COUNTY IN EAST CENTRAL SOUTH DAKOTA... * UNTIL 1145 AM CDT * AT 1122 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM WAS LOCATED NEAR LOOMIS...OR NEAR MITCHELL...AND MOVING NORTHEAST AT 30 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... ARTESIAN AROUND 1145 AM CDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. && LAT...LON 4406 9798 4398 9777 4370 9798 4376 9816 TIME...MOT...LOC 1622Z 205DEG 26KT 4382 9801 WIND...HAIL <58MPH 1.00IN $$ MJF
1 follow-up statement
467
WWUS53 KFSD 151639
SVSFSD
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE SIOUX FALLS SD
1139 AM CDT SUN APR 15 2012
SDC035-061-151649-
/O.CAN.KFSD.SV.W.0004.000000T0000Z-120415T1645Z/
HANSON SD-DAVISON SD-
1139 AM CDT SUN APR 15 2012
...THE SEVERE THUNDERSTORM WARNING FOR NORTHEASTERN DAVISON AND
NORTHWESTERN HANSON COUNTIES IS CANCELLED...
THE STORM WHICH PROMPTED THE WARNING HAS MOVED OUT OF THE WARNED
AREA.
LAT...LON 4404 9792 4400 9781 4398 9779 4385 9788
4385 9795 4389 9808 4406 9798 4406 9797
TIME...MOT...LOC 1639Z 205DEG 26KT 4396 9795
$$
SDC097-111-151645-
/O.CON.KFSD.SV.W.0004.000000T0000Z-120415T1645Z/
SANBORN SD-MINER SD-
1139 AM CDT SUN APR 15 2012
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR WEST CENTRAL
MINER AND SOUTHEASTERN SANBORN COUNTIES UNTIL 1145 AM CDT...
AT 1139 AM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE
TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE
HAIL. THIS STORM WAS LOCATED 5 MILES SOUTH OF ARTESIAN...OR 14 MILES
NORTH OF MITCHELL...MOVING NORTHEAST AT 30 MPH.
THE SEVERE THUNDERSTORM WILL BE NEAR...
ARTESIAN AROUND 1145 AM CDT...
THIS STORM HAS A HISTORY OF PRODUCING A LOT OF DIME TO NICKEL SIZED
HAIL...WITH SOME QUARTERS. A LOCAL STORM REPORT IS FORTHCOMING.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER
HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR
YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR
HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE
INTO AREAS WHERE WATER COVERS THE ROAD.
&&
LAT...LON 4404 9792 4400 9781 4398 9779 4385 9788
4385 9795 4389 9808 4406 9798 4406 9797
TIME...MOT...LOC 1639Z 205DEG 26KT 4396 9795
WIND...HAIL <58MPH 1.00IN
$$The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 15, 11:45 AM CDT | Severe Thunderstorm Warning | FSD | Beadle, Kingsbury, Miner, Sanborn | 45 min |
| Apr 15, 2:56 PM CDT | Tornado Warning | FSD | Bon Homme | 34 min |
| Apr 15, 3:19 PM CDT | Severe Thunderstorm Warning | FSD | Brookings, Moody | 16 min |
| Apr 15, 5:10 PM CDT | High Wind Warning | FSD | Aurora, Beadle, Bon Homme, Brookings, Brule, Charles Mix and 17 more | 11 hr |
| Apr 15, 5:10 PM CDT | Wind Advisory | FSD | Aurora, Brule, Charles Mix, Douglas, Gregory, Jerauld | 3 hr |
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.