Alert archive / Minnesota / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 387, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Sep 21, 2007, 1:36 AM CDT for Todd County, Minnesota. It was in force for 54 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
- Sep 21, 2007, 1:36 AM CDT (06:36 UTC)
- Expired
- Sep 21, 2007, 2:30 AM CDT
- In force
- 54 min
- Issued by
- NWS Twin Cities, MN
- Area
- Counties, with a storm outline in the text
County Todd County, MN
The radar
The Minneapolis radar (KMPX), 193 km from the middle of the area, began a volume at 06:39 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 |
|---|---|---|---|
| Sep 21, 2:00 AM CDT | HAIL 1 | Hewitt, MN | NICKEL TO QUARTER SIZE HAIL REPORTED. |
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 |
|---|---|---|---|
| Sep 21, 12:00 AM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 6.6 hours before the alert went out and 192 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
- 1394 J/kg
- Mixed-layer CIN
- -85 J/kg
- Mixed-layer LCL
- 838 m above ground
- 0-6 km bulk shear
- 60 kt
- 0-1 km storm-relative helicity
- 192 m²/s²
- 0-3 km storm-relative helicity
- 567 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 24.8
The text
As transmitted, in the capitals the NWS used until 2016.
000
WUUS53 KMPX 210636
SVRMPX
MNC153-210730-
/O.NEW.KMPX.SV.W.0387.070921T0636Z-070921T0730Z/
BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
136 AM CDT FRI SEP 21 2007
THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A
* SEVERE THUNDERSTORM WARNING FOR...
NORTHERN TODD COUNTY IN CENTRAL MINNESOTA...
* UNTIL 230 AM CDT
* AT 135 AM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM...
CAPABLE OF PRODUCING GOLF BALL...TO BASEBALL SIZE HAIL. THIS
STORM WAS LOCATED 10 MILES WEST OF BERTHA...OR ABOUT 26 MILES
NORTH OF ALEXANDRIA... AND MOVING NORTHEAST AT 40 MPH.
* LOCATIONS IMPACTED INCLUDE...
EAGLE BEND...
BERTHA...
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.
STAY INDOORS...AND AWAY FROM WINDOWS.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 AM CDT FRIDAY MORNING FOR
CENTRAL MINNESOTA.
LAT...LON 4635 9467 4616 9465 4613 9516 4627 9516
4628 9518 4634 9518 4636 9514
TIME...MOT...LOC 0636Z 244DEG 38KT 4624 9525
$$
JPR3 follow-up statements
000
WWUS53 KMPX 210658
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
157 AM CDT FRI SEP 21 2007
MNC153-210730-
/O.CON.KMPX.SV.W.0387.000000T0000Z-070921T0730Z/
TODD MN-
157 AM CDT FRI SEP 21 2007
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 AM CDT
FOR TODD COUNTY...
AT 153 AM CDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE
THUNDERSTORM...CAPABLE OF PRODUCING GOLF BALL...TO BASBALL SIZE
HAIL. THIS STORM WAS LOCATED NEAR HEWITT...OR ABOUT OVER
BERTHA...AND MOVING NORTHEAST AT 40 MPH.
OTHER LOCATIONS IN THE WARNING INCLUDE PHILBROOK...HEWITT...EAGLE
BEND AND BERTHA.
THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A
SHELTER...PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.
A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 AM CDT FRIDAY MORNING FOR
CENTRAL MINNESOTA.
LAT...LON 4635 9467 4616 9465 4613 9516 4627 9516
4628 9518 4634 9518 4636 9514
TIME...MOT...LOC 0657Z 244DEG 38KT 4632 9505
$$
JPR000 WWUS53 KMPX 210707 SVSMPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 206 AM CDT FRI SEP 21 2007 MNC153-210730- /O.CON.KMPX.SV.W.0387.000000T0000Z-070921T0730Z/ TODD MN- 206 AM CDT FRI SEP 21 2007 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 230 AM CDT FOR TODD COUNTY... AT 200 AM CDT...NICKEL SIZE HAIL WAS REPORTED IN HEWITT. AT 202 AM CDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM...CAPABLE OF PRODUCING GOLF BALL SIZE HAIL. THIS STORM WAS LOCATED 5 MILES EAST OF HEWITT...OR ABOUT OVER VERNDALE...AND MOVING NORTHEAST AT 40 MPH. OTHER LOCATIONS IN THE WARNING INCLUDE PHILBROOK...HEWITT AND BERTHA. THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER... PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS. A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 AM CDT FRIDAY MORNING FOR CENTRAL MINNESOTA. LAT...LON 4635 9467 4622 9466 4622 9510 4636 9514 TIME...MOT...LOC 0706Z 244DEG 38KT 4636 9492 $$ JPR
000 WWUS53 KMPX 210725 SVSMPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 224 AM CDT FRI SEP 21 2007 MNC153-210734- /O.EXP.KMPX.SV.W.0387.000000T0000Z-070921T0730Z/ TODD MN- 224 AM CDT FRI SEP 21 2007 ...THE SEVERE THUNDERSTORM WARNING FOR TODD COUNTY EXPIRES AT 230 AM CDT... SEVERE STORMS WERE ABOUT TO MOVE OUT OF THE COUNTY. NO ADDITIONAL WARNINGS ARE EXPECTED AT THIS TIME. A TORNADO WATCH REMAINS IN EFFECT UNTIL 700 AM CDT FRIDAY MORNING FOR CENTRAL MINNESOTA. LAT...LON 4635 9467 4622 9466 4622 9510 4636 9514 TIME...MOT...LOC 0724Z 244DEG 38KT 4644 9467 $$ JPR
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Sep 20, 7:29 PM CDT | Severe Thunderstorm Warning | MPX | Anoka, Washington | 34 min |
| Sep 20, 7:56 PM CDT | Severe Thunderstorm Warning | MPX | Isanti | 38 min |
| Sep 21, 1:06 AM CDT | Severe Thunderstorm Warning | MPX | Douglas | 38 min |
| Sep 21, 4:30 AM CDT | Wind Advisory | MPX | Benton, Brown, Chippewa, Douglas, Kandiyohi, Lac qui Parle and 15 more | 10 hr |
| Sep 21, 5:31 AM CDT | Severe Thunderstorm Warning | MPX | Wright | 44 min |
| Sep 21, 5:36 AM CDT | Severe Thunderstorm Warning | MPX | Chisago, Isanti | 25 min |
| Sep 21, 5:45 AM CDT | Severe Thunderstorm Warning | MPX | Benton | 18 min |
| Sep 21, 5:59 AM CDT | Severe Thunderstorm Warning | MPX | Sherburne | 17 min |
| Sep 21, 6:13 AM CDT | Severe Thunderstorm Warning | MPX | Anoka, Isanti | 22 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.