Alert archive / Iowa / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 104, NWS Sioux Falls, SD
NWS Sioux Falls, SD issued this severe thunderstorm warning at May 19, 2012, 7:56 PM CDT for 4 counties in Iowa. It was in force for 38 min. 2 reports 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
- May 19, 2012, 7:56 PM CDT (00:56 UTC)
- Expired
- May 19, 2012, 8:34 PM CDT
- In force
- 38 min
- Issued by
- NWS Sioux Falls, SD
- Area
- Storm-based polygon
- Hail
- 1.25 in
- Wind
- 60.0 mph
Counties Cherokee County, IA, Ida County, IA, Plymouth County, IA, Woodbury County, IA
The radar
The Omaha radar (KOAX), 136 km from the middle of the area, began a volume at 00:57 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 |
|---|---|---|---|
| May 19, 8:00 PM CDT | HAIL 0.75 | 5 Wsw Anthon, IA | ALSO RECEIVED 1 INCH OF RAIN |
| May 19, 8:00 PM CDT | HAIL 1 | 4 W Anthon, IA | MOSTLY SMALL HAIL...BUT A FEW STONES TO SIZE OF QUARTERS |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| May 19, 6:52 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Omaha, NE (KOAX), launched 00:00Z, 0.9 hours before the alert went out and 136 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
- 1597 J/kg
- Mixed-layer CIN
- -7 J/kg
- Mixed-layer LCL
- 1383 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- 122 m²/s²
- 0-3 km storm-relative helicity
- 188 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 8.3
The text
As transmitted, in the capitals the NWS used until 2016.
423 WUUS53 KFSD 200056 SVRFSD IAC035-093-149-193-200145- /O.NEW.KFSD.SV.W.0104.120520T0056Z-120520T0145Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE SIOUX FALLS SD 756 PM CDT SAT MAY 19 2012 THE NATIONAL WEATHER SERVICE IN SIOUX FALLS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHWESTERN CHEROKEE COUNTY IN NORTHWEST IOWA... EXTREME NORTHWESTERN IDA COUNTY IN WEST CENTRAL IOWA... SOUTHEASTERN PLYMOUTH COUNTY IN NORTHWEST IOWA... EASTERN WOODBURY COUNTY IN WEST CENTRAL IOWA... * UNTIL 845 PM CDT * AT 756 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING HALF DOLLAR SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR ANTHON...OR 23 MILES WEST OF IDA GROVE...AND MOVING NORTH AT 25 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... MOVILLE AROUND 810 PM CDT... CORRECTIONVILLE AROUND 815 PM CDT... PIERSON AROUND 825 PM CDT... KINGSLEY AND WASHTA AROUND 830 PM 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 4269 9609 4267 9568 4222 9570 4222 9614 TIME...MOT...LOC 0056Z 187DEG 23KT 4237 9592 WIND...HAIL 60MPH 1.25IN $$ MJF
2 follow-up statements
901 WWUS53 KFSD 200118 SVSFSD SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 818 PM CDT SAT MAY 19 2012 IAC035-093-149-193-200145- /O.CON.KFSD.SV.W.0104.000000T0000Z-120520T0145Z/ PLYMOUTH IA-IDA IA-CHEROKEE IA-WOODBURY IA- 818 PM CDT SAT MAY 19 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN WOODBURY...SOUTHWESTERN CHEROKEE...EXTREME NORTHWESTERN IDA AND SOUTHEASTERN PLYMOUTH COUNTIES UNTIL 845 PM CDT... AT 818 PM CDT...NATIONAL WEATHER SERVICE METEOROLOGISTS WERE TRACKING A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR CORRECTIONVILLE...OR 22 MILES WEST OF IDA GROVE...MOVING NORTH AT 25 MPH. THE SEVERE THUNDERSTORM WILL BE NEAR... PIERSON AROUND 830 PM CDT... WASHTA AND KINGSLEY AROUND 835 PM CDT... PRECAUTIONARY/PREPAREDNESS ACTIONS... SEVERE THUNDERSTORMS PRODUCE DAMAGING WIND IN EXCESS OF 60 MILES PER HOUR...DESTRUCTIVE HAIL...DEADLY LIGHTNING...AND VERY HEAVY RAIN. FOR YOUR PROTECTION MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF YOUR HOME OR BUSINESS. HEAVY RAINS FLOOD ROADS QUICKLY SO DO NOT DRIVE INTO AREAS WHERE WATER COVERS THE ROAD. && LAT...LON 4269 9609 4267 9568 4222 9570 4222 9614 TIME...MOT...LOC 0118Z 191DEG 21KT 4248 9587 WIND...HAIL 60MPH 1.00IN $$ MJF
410 WWUS53 KFSD 200134 SVSFSD SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE SIOUX FALLS SD 834 PM CDT SAT MAY 19 2012 IAC035-093-149-193-200144- /O.CAN.KFSD.SV.W.0104.000000T0000Z-120520T0145Z/ PLYMOUTH IA-IDA IA-CHEROKEE IA-WOODBURY IA- 834 PM CDT SAT MAY 19 2012 ...THE SEVERE THUNDERSTORM WARNING FOR EASTERN WOODBURY... SOUTHWESTERN CHEROKEE...EXTREME NORTHWESTERN IDA AND SOUTHEASTERN PLYMOUTH COUNTIES IS CANCELLED... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY. SMALL HAIL AND GUSTY WINDS ARE STILL POSSIBLE WITH THESE THUNDERSTORM. LAT...LON 4269 9609 4267 9568 4222 9570 4222 9614 TIME...MOT...LOC 0134Z 191DEG 21KT 4257 9585 $$ MJF
The office that day
Everything else NWS Sioux Falls, SD issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 19, 9:09 PM CDT | Severe Thunderstorm Warning | FSD | Cherokee, Ida, Plymouth, Woodbury | 51 min |
| May 19, 9:38 PM CDT | Severe Thunderstorm Warning | FSD | Buena Vista, Cherokee, Clay, O'Brien, Plymouth | 37 min |
| May 19, 10:11 PM CDT | Flash Flood Warning | FSD | Clay, Dickinson, O'Brien | 3 hr |
Nearby
Severe Thunderstorm Warnings in Iowa, 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.