Alert archive / Minnesota / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 325, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 21, 2007, 8:08 PM CDT for Freeborn County, Minnesota. It was in force for 67 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
- Aug 21, 2007, 8:08 PM CDT (01:08 UTC)
- Expired
- Aug 21, 2007, 9:15 PM CDT
- In force
- 67 min
- Issued by
- NWS Twin Cities, MN
- Area
- Counties, with a storm outline in the text
County Freeborn County, MN
The radar
The Minneapolis radar (KMPX), 147 km from the middle of the area, began a volume at 01:09 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 |
|---|---|---|---|
| Aug 21, 8:40 PM CDT | HAIL 1 | Glenville, 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 00:00Z, 1.1 hours before the alert went out and 148 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
- 1298 m above ground
- 0-6 km bulk shear
- 65 kt
- 0-1 km storm-relative helicity
- 8 m²/s²
- 0-3 km storm-relative helicity
- 453 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 220108 SVRMPX MNC047-220215- /O.NEW.KMPX.SV.W.0325.070822T0108Z-070822T0215Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 808 PM CDT TUE AUG 21 2007 THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN FREEBORN COUNTY IN SOUTH CENTRAL MINNESOTA... * UNTIL 915 PM CDT * AT 806 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM... CAPABLE OF PRODUCING NICKEL SIZE HAIL. THIS STORM WAS LOCATED 30 MILES SOUTHWEST OF GLENVILLE...OR ABOUT 26 MILES SOUTHEAST OF BLUE EARTH...AND MOVING EAST AT 30 MPH. * LOCATIONS IMPACTED INCLUDE... GLENVILLE... 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 4356 9364 4337 9380 4351 9304 4364 9303 $$
4 follow-up statements
000
WWUS53 KMPX 220120
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
818 PM CDT TUE AUG 21 2007
MNC047-220215-
/O.CON.KMPX.SV.W.0325.000000T0000Z-070822T0215Z/
FREEBORN MN-
818 PM CDT TUE AUG 21 2007
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM CDT
FOR SOUTHERN FREEBORN COUNTY...
AT 817 PM CDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE
THUNDERSTORM...CAPABLE OF PRODUCING QUARTER SIZE HAIL. THIS STORM
WAS LOCATED 4 MILES EAST OF EMMONS IOWA...OR ABOUT 8 MILES SOUTHWEST
OF GLENVILLE...AND MOVING NORTHEAST AT 45 MPH.
OTHER LOCATIONS IN THE WARNING INCLUDE LONDON...TWIN
LAKES...MYRTLE...HAYWARD...GLENVILLE...EMMONS...CONGER...AND
INTERSTATE 35 SOUTH OF ALBERT LEA.
VERY HEAVY RAIN IS EXPECTED WITH THIS STORM. BE ALERT FOR POSSIBLE
FLOODING.
THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH...PREPARE
IMMEDIATELY FOR DAMAGING WINDS...DESTRUCTIVE HAIL...AND DEADLY CLOUD
TO GROUND LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER...
PREFERABLY INSIDE A STRONG BUILDING BUT AWAY FROM WINDOWS.
LAT...LON 4359 9359 4351 9366 4350 9305 4368 9304
4364 9342
$$000
WWUS53 KMPX 220136
SVSMPX
SEVERE WEATHER STATEMENT
NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN
832 PM CDT TUE AUG 21 2007
MNC047-220215-
/O.CON.KMPX.SV.W.0325.000000T0000Z-070822T0215Z/
FREEBORN MN-
832 PM CDT TUE AUG 21 2007
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM CDT
FOR SOUTHERN FREEBORN COUNTY...
AT 830 PM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM
CAPABLE OF PRODUCING HALF DOLLAR SIZE HAIL. THIS STORM WAS LOCATED
ABOUT OVER GLENVILLE...AND MOVING EAST NORTHEAST AT 40 MPH.
OTHER LOCATIONS IN THE WARNING INCLUDE LONDON...TWIN
LAKES...MYRTLE...HAYWARD...AND INTERSTATE 35 SOUTH OF ALBERT LEA.
VERY HEAVY RAIN IS EXPECTED WITH THIS STORM. BE ALERT FOR POSSIBLE
FLOODING.
DOPPLER RADAR HAS INDICATED SOME WEAK ROTATION WITHIN THIS STORM.
WHILE THE ENVIRONMENT IS NOT FAVORABLE FOR A TORNADO...ONE MAY STILL
DEVELOP. IF A TORNADO IS SPOTTED...ACT QUICKLY AND MOVE TO A PLACE
OF SAFETY IN A STURDY STRUCTURE...SUCH AS A BASEMENT OR SMALL
INTERIOR ROOM.
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.
LAT...LON 4358 9356 4351 9362 4350 9305 4374 9305
4370 9317 4364 9342
$$000 WWUS53 KMPX 220159 SVSMPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 857 PM CDT TUE AUG 21 2007 MNC047-220215- /O.CON.KMPX.SV.W.0325.000000T0000Z-070822T0215Z/ FREEBORN MN- 857 PM CDT TUE AUG 21 2007 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 915 PM CDT FOR SOUTHERN FREEBORN COUNTY... AT 855 PM CDT...DOPPLER RADAR INDICATED THE INITIAL SEVERE THUNDERSTORM HAS MOVED EAST OUT OF FREEBORN COUNTY. HOWEVER...ANOTHER INTENSIFYING THUNDERSTORM WAS MOVING EAST NORTHEAST FROM WORTH COUNTY IOWA AND WILL BE CAPABLE OF PRODUCING PENNY SIZE HAIL AS IT MOVES ACROSS FAR SOUTHEAST FREEBORN COUNTY. THIS STORM WAS LOCATED 12 MILES SOUTH OF GLENVILLE...OR ABOUT 7 MILES WEST OF NORTHWOOD IOWA...AND MOVING EAST NORTHEAST AT 50 MPH. OTHER LOCATIONS IN THE WARNING INCLUDE LONDON...MYRTLE AND GLENVILLE. LAT...LON 4364 9322 4350 9342 4350 9305 4371 9305 $$
000 WWUS53 KMPX 220214 SVSMPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 912 PM CDT TUE AUG 21 2007 MNC047-220222- /O.EXP.KMPX.SV.W.0325.000000T0000Z-070822T0215Z/ FREEBORN MN- 912 PM CDT TUE AUG 21 2007 ...THE SEVERE THUNDERSTORM WARNING FOR SOUTHERN FREEBORN COUNTY EXPIRES AT 915 PM CDT... AT 912 PM CDT...DOPPLER RADAR INDICATED THAT SEVERE THUNDERSTORMS HAD MOVED OUT OF THE COUNTY. HOWEVER...MORE THUNDERSTORMS WERE DEVELOPING IN THE AREA...REMAIN ALERT FOR POSSIBLE ADDITIONAL WARNINGS. ALSO...FLOODING WILL REMAIN A CONCERN THROUGH THE REST OF THE EVENING AS THUNDERSTORMS TRACK OVER THE SATURATED GROUND. AT 840 PM CDT...HAIL OF QUARTER SIZE WAS REPORTED JUST SOUTH OF GLENVILLE WITH THE STORM. REPORT ANY SEVERE WEATHER TO YOUR LOCAL LAW ENFORCEMENT FOR RELAY TO THE NATIONAL WEATHER SERVICE. LAT...LON 4364 9322 4350 9342 4350 9305 4371 9305 $$
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 21, 7:06 PM CDT | Severe Thunderstorm Warning | MPX | Blue Earth, Le Sueur, Rice, Waseca | 37 min |
| Aug 21, 8:42 PM CDT | Flash Flood Warning | MPX | Faribault, Freeborn | 3 hr |
| Aug 22, 3:21 AM CDT | Flash Flood Watch | MPX | Blue Earth, Brown, Faribault, Freeborn, Goodhue, Le Sueur and 6 more | 33 hr |
| Aug 22, 3:25 AM CDT | Dense Fog Advisory | MPX | Anoka, Benton, Blue Earth, Brown, Carver, Chippewa and 36 more | 7 hr |
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.