Alert archive / Minnesota / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 16, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Apr 21, 2007, 9:51 PM CDT for Lac qui Parle County, Minnesota. It was in force for 24 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 21, 2007, 9:51 PM CDT (02:51 UTC)
- Expired
- Apr 21, 2007, 10:15 PM CDT
- In force
- 24 min
- Issued by
- NWS Twin Cities, MN
- Area
- Counties, with a storm outline in the text
County Lac qui Parle County, MN
The radar
The Aberdeen radar (KABR), 163 km from the middle of the area, began a volume at 02:54 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 21, 9:57 PM CDT | HAIL 1 | 6 W Bellingham, MN |
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 |
|---|---|---|---|
| Apr 21, 9:31 PM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
The nearest sounding before it
Aberdeen, SD (KABR), launched 00:00Z, 2.9 hours before the alert went out and 164 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
- 1323 J/kg
- Mixed-layer CIN
- -6 J/kg
- Mixed-layer LCL
- 965 m above ground
- 0-6 km bulk shear
- 49 kt
- 0-1 km storm-relative helicity
- 1 m²/s²
- 0-3 km storm-relative helicity
- 265 m²/s²
- Significant tornado parameter
- 0.8
- Supercell composite
- 4.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS53 KMPX 220252 CCA SVRMPX MNC073-220315- /O.NEW.KMPX.SV.W.0016.070422T0251Z-070422T0315Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING...CORRECTION TO LAT LON POINTS NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 951 PM CDT SAT APR 21 2007 THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... LAC QUI PARLE COUNTY IN WEST CENTRAL MINNESOTA... * UNTIL 1015 PM CDT * AT 948 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM... CAPABLE OF PRODUCING LARGE HAIL. THIS STORM WAS LOCATED OVER EXTREME NORTHWESTERN LAC QUI PARLE COUNTY...OR ABOUT 7 MILES SOUTH OF BIG STONE CITY...AND MOVING NORTHEAST AT 40 MPH. * THE SEVERE THUNDERSTORM WILL OTHERWISE REMAIN OVER MAINLY RURAL AREAS OF THE INDICATED COUNTY SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. PREPARE TO MOVE TO A PLACE OF SAFETY IN A STURDY STRUCTURE SUCH AS A BASEMENT OR SMALL INTERIOR ROOM IF A TORNADO IS SPOTTED. A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 200 AM CDT SUNDAY MORNING FOR WEST CENTRAL MINNESOTA. LAT...LON 4530 9641 4507 9644 4518 9617 $$ LS
1 follow-up statement
000 WWUS53 KMPX 220306 SVSMPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 1007 PM CDT SAT APR 21 2007 MNC073-220317- /O.EXP.KMPX.SV.W.0016.000000T0000Z-070422T0315Z/ LAC QUI PARLE MN- 1007 PM CDT SAT APR 21 2007 ...THE SEVERE THUNDERSTORM WARNING FOR LAC QUI PARLE COUNTY EXPIRES AT 1015 PM CDT... SEVERE STORMS WERE ABOUT TO MOVE OUT OF THE COUNTY. HOWEVER...MORE THUNDERSTORMS WERE DEVELOPING IN THE AREA...REMAIN ALERT FOR POSSIBLE ADDITIONAL WARNINGS. LAT...LON 4530 9641 4507 9644 4518 9617 $$ LS
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 21, 9:27 PM CDT | Severe Thunderstorm Warning | MPX | Stevens | 33 min |
| Apr 21, 9:51 PM CDT | Severe Thunderstorm Warning | MPX | Lac qui Parle | 24 min |
| Apr 21, 10:14 PM CDT | Severe Thunderstorm Warning | MPX | Stevens | 31 min |
| Apr 21, 10:52 PM CDT | Severe Thunderstorm Warning | MPX | Douglas | 23 min |
| Apr 21, 10:58 PM CDT | Severe Thunderstorm Warning | MPX | Lac qui Parle | 19 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 2007Every severe thunderstorm warning in 2007
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.