Alert archive / Minnesota / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 18, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Apr 21, 2007, 10:52 PM CDT for Douglas County, Minnesota. It was in force for 23 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Apr 21, 2007, 10:52 PM CDT (03:52 UTC)
- Expired
- Apr 21, 2007, 11:15 PM CDT
- In force
- 23 min
- Issued by
- NWS Twin Cities, MN
- Area
- Counties, with a storm outline in the text
County Douglas County, MN
The radar
The Minneapolis radar (KMPX), 200 km from the middle of the area, began a volume at 03:55 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.
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
Minneapolis, MN (KMPX), launched 00:00Z, 3.9 hours before the alert went out and 198 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
- 16 J/kg
- Mixed-layer CIN
- -307 J/kg
- Mixed-layer LCL
- 2804 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 146 m²/s²
- 0-3 km storm-relative helicity
- 290 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.4
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS53 KMPX 220353 SVRMPX MNC041-220415- /O.NEW.KMPX.SV.W.0018.070422T0352Z-070422T0415Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 1052 PM CDT SAT APR 21 2007 THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... DOUGLAS COUNTY IN WEST CENTRAL MINNESOTA... * UNTIL 1115 PM CDT * AT 1051 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM... CAPABLE OF PRODUCING LARGE HAIL. THIS STORM WAS LOCATED 5 MILES SOUTHWEST OF BRANDON...OR ABOUT 13 MILES WEST OF ALEXANDRIA...AND MOVING NORTHEAST AT 45 MPH. * LOCATIONS IMPACTED INCLUDE... EVANSVILLE... BRANDON... HAIL UP TO ONE INCH IN DIAMETER HAS BEEN REPORTED SIX MILES WEST OF BELLINGHAM WITH THIS STORM. 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 4610 9574 4577 9573 4589 9538 4609 9513 $$ LS
2 follow-up statements
000 WWUS53 KMPX 220400 SVSMPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 1100 PM CDT SAT APR 21 2007 MNC041-220415- /O.CON.KMPX.SV.W.0018.000000T0000Z-070422T0415Z/ DOUGLAS MN- 1100 PM CDT SAT APR 21 2007 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1115 PM CDT FOR DOUGLAS COUNTY... AT 1059 PM CDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM...CAPABLE OF PRODUCING LARGE HAIL. THIS STORM WAS LOCATED NEAR BRANDON...AND MOVING NORTHEAST AT 45 MPH. OTHER LOCATIONS IN THE WARNING INCLUDE ROSE CITY...MELBY...LEAF VALLEY...HOLMES...MILTONA...MILLERVILLE...GARFIELD...EVANSVILLE... CARLOS AND BRANDON. THIS STORM HAS A HISTORY OF PRODUCING LARGE HAIL. SEEK SHELTER NOW INSIDE A STURDY STRUCTURE AND STAY AWAY FROM WINDOWS LAT...LON 4610 9574 4577 9573 4589 9538 4609 9513 $$ LS
000 WWUS53 KMPX 220415 SVSMPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 1115 PM CDT SAT APR 21 2007 MNC041-220425- /O.EXP.KMPX.SV.W.0018.000000T0000Z-070422T0415Z/ DOUGLAS MN- 1115 PM CDT SAT APR 21 2007 ...THE SEVERE THUNDERSTORM WARNING FOR DOUGLAS COUNTY EXPIRES AT 1115 PM CDT... SEVERE STORMS HAVE MOVED OUT OF THE COUNTY. HOWEVER...MORE THUNDERSTORMS WERE DEVELOPING IN THE AREA...REMAIN ALERT FOR POSSIBLE ADDITIONAL WARNINGS. LAT...LON 4610 9574 4577 9573 4589 9538 4609 9513 $$ 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, 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, 10:58 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.