Alert archive / Minnesota / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 10, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Apr 21, 2007, 9:47 AM CDT for 5 counties in Minnesota. It was in force for 58 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, 9:47 AM CDT (14:47 UTC)
- Expired
- Apr 21, 2007, 10:45 AM CDT
- In force
- 58 min
- Issued by
- NWS Twin Cities, MN
- Area
- Counties, with a storm outline in the text
Counties McLeod County, MN, Meeker County, MN, Renville County, MN, Sibley County, MN, Wright County, MN
The radar
The Minneapolis radar (KMPX), 68 km from the middle of the area, began a volume at 14:48 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, 10:37 AM CDT | HAIL 1 | 1 Se Cokato, MN |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 2.8 hours before the alert went out and 65 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
- 1697 m above ground
- 0-6 km bulk shear
- 42 kt
- 0-1 km storm-relative helicity
- 341 m²/s²
- 0-3 km storm-relative helicity
- 335 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS53 KMPX 211448 SVRMPX MNC085-093-129-143-171-211545- /O.NEW.KMPX.SV.W.0010.070421T1447Z-070421T1545Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 947 AM CDT SAT APR 21 2007 THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WRIGHT COUNTY IN CENTRAL MINNESOTA... MEEKER COUNTY IN CENTRAL MINNESOTA... MCLEOD COUNTY IN CENTRAL MINNESOTA... RENVILLE COUNTY IN CENTRAL MINNESOTA... SIBLEY COUNTY IN CENTRAL MINNESOTA... * UNTIL 1045 AM CDT * AT 944 AM CDT...DOPPLER RADAR INDICATED TWO SEVERE THUNDERSTORMS... ONE NEAR HECTOR...AND THE OTHER NEAR FERNANDO. LARGE HAIL IS EXPECTED WITH THESE STORMS. * LOCATIONS IMPACTED INCLUDE... WINSTED... HUTCHINSON... HECTOR... DASSEL... COKATO... BROWNTON... ANNANDALE... 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. LAT...LON 4478 9483 4451 9449 4500 9391 4531 9406 $$ RJN
3 follow-up statements
000
WWUS53 KMPX 211514
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1012 AM CDT SAT APR 21 2007
MNC129-143-211522-
/O.CAN.KMPX.SV.W.0010.000000T0000Z-070421T1545Z/
RENVILLE MN-SIBLEY MN-
1012 AM CDT SAT APR 21 2007
...THE SEVERE THUNDERSTORM WARNING FOR SIBLEY AND RENVILLE COUNTIES
IS CANCELLED...
LAT...LON 4494 9474 4491 9449 4471 9447 4473 9402
4497 9405 4500 9391 4531 9406
$$
MNC085-093-171-211545-
/O.CON.KMPX.SV.W.0010.000000T0000Z-070421T1545Z/
WRIGHT MN-MEEKER MN-MCLEOD MN-
1012 AM CDT SAT APR 21 2007
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 AM CDT
FOR MCLEOD...MEEKER AND WRIGHT COUNTIES...
AT 1009 AM CDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE
THUNDERSTORM...CAPABLE OF PRODUCING LARGE HAIL. THIS STORM WAS
LOCATED 4 MILES EAST OF CEDAR MILLS...OR ABOUT 13 MILES SOUTHWEST OF
DASSEL...AND MOVING NORTHEAST AT 45 MPH.
ANOTHER SEVERE THUNDERSTORM WAS LOCATED NEAR GLENCOE...MOVING TOWARD
THE NORTHEAST AT 45 MPH.
OTHER LOCATIONS IN THE WARNING INCLUDE...STOCKHOLM...
RICE LAKE...COKATO.
LAT...LON 4494 9474 4491 9449 4471 9447 4473 9402
4497 9405 4500 9391 4531 9406
$$
RJN000
WWUS53 KMPX 211529
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1027 AM CDT SAT APR 21 2007
MNC085-211537-
/O.CAN.KMPX.SV.W.0010.000000T0000Z-070421T1545Z/
MCLEOD MN-
1027 AM CDT SAT APR 21 2007
...THE SEVERE THUNDERSTORM WARNING FOR MCLEOD COUNTY IS CANCELLED...
LAT...LON 4495 9474 4492 9449 4499 9450 4497 9407
4498 9405 4501 9391 4530 9407 4528 9450
4531 9473 4519 9474
$$
MNC093-171-211545-
/O.CON.KMPX.SV.W.0010.000000T0000Z-070421T1545Z/
WRIGHT MN-MEEKER MN-
1027 AM CDT SAT APR 21 2007
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1045 AM CDT
FOR MEEKER AND WRIGHT COUNTIES...
AT 1026 AM CDT...A SEVERE THUNDERSTORM WAS LOCATED 4 MILES
NORTHEAST OF LITCHFIELD...OR ABOUT 9 MILES NORTHWEST OF DASSEL...AND
MOVING NORTHEAST AT 45 MPH.
AT 1022 AM...HAIL THREE QUARTERS OF AN INCH IN DIAMETER WAS REPORTED
BY A SPOTTER 1 MILE SOUTH OF LITCHFIELD.
OTHER LOCATIONS IN THE WARNING INCLUDE
WATKINS AND KINGSTON.
LAT...LON 4495 9474 4492 9449 4499 9450 4497 9407
4498 9405 4501 9391 4530 9407 4528 9450
4531 9473 4519 9474
$$
RJN000
WWUS53 KMPX 211541
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
1040 AM CDT SAT APR 21 2007
MNC093-171-211600-
/O.EXP.KMPX.SV.W.0010.000000T0000Z-070421T1545Z/
WRIGHT MN-MEEKER MN-
1040 AM CDT SAT APR 21 2007
...THE SEVERE THUNDERSTORM WARNING FOR MEEKER AND WRIGHT COUNTIES
EXPIRES AT 1045 AM CDT...
THUNDERSTORMS HAVE WEAKENED...BUT HAIL UP TO DIME SIZE WILL REMAIN
POSSIBLE IN NORTHERN PARTS OF MEEKER AND WRIGHT COUNTIES UNTIL 1115
AM CDT.
LAT...LON 4495 9474 4492 9449 4499 9450 4497 9407
4498 9405 4501 9391 4530 9407 4528 9450
4531 9473 4519 9474
$$
RJNThe office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 21, 3:46 AM CDT | Wind Advisory | MPX | Blue Earth, Brown, Faribault, Freeborn, Martin, Redwood and 4 more | 16 hr |
| Apr 21, 6:12 AM CDT | Severe Thunderstorm Warning | MPX | Stearns | 40 min |
| Apr 21, 11:31 AM CDT | Severe Thunderstorm Warning | MPX | Sherburne | 29 min |
| Apr 21, 11:57 AM CDT | Severe Thunderstorm Warning | MPX | Isanti | 33 min |
| Apr 21, 12:16 PM CDT | Severe Thunderstorm Warning | MPX | Chisago | 44 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.