Alert archive / Minnesota / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 285, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 11, 2007, 4:39 AM CDT for Le Sueur County, Minnesota. It was in force for 39 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
- Aug 11, 2007, 4:39 AM CDT (09:39 UTC)
- Expired
- Aug 11, 2007, 5:18 AM CDT
- In force
- 39 min
- Issued by
- NWS Twin Cities, MN
- Area
- Counties, with a storm outline in the text
County Le Sueur County, MN
The radar
The Minneapolis radar (KMPX), 50 km from the middle of the area, began a volume at 09:42 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 |
|---|---|---|---|
| Aug 11, 1:31 AM CDT | Severe Thunderstorm Watch | SPC | 4 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 9.7 hours before the alert went out and 50 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
- 639 J/kg
- Mixed-layer CIN
- -156 J/kg
- Mixed-layer LCL
- 1768 m above ground
- 0-6 km bulk shear
- 26 kt
- 0-1 km storm-relative helicity
- 8 m²/s²
- 0-3 km storm-relative helicity
- 13 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.1
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS53 KMPX 110939 SVRMPX MNC079-111045- /O.NEW.KMPX.SV.W.0285.070811T0939Z-070811T1045Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 439 AM CDT SAT AUG 11 2007 THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... LE SUEUR COUNTY IN SOUTH CENTRAL MINNESOTA... * UNTIL 545 AM CDT * AT 438 AM CDT...DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM... CAPABLE OF PRODUCING NICKEL SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR LE CENTER...OR ABOUT 13 MILES EAST OF ST PETER...AND MOVING SOUTHEAST AT 35 MPH. * LOCATIONS IMPACTED INCLUDE... MONTGOMERY... STAY INDOORS...AND AWAY FROM WINDOWS. LAT...LON 4450 9374 4434 9386 4421 9355 4447 9355 $$
2 follow-up statements
000 WWUS53 KMPX 110958 SVSMPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 458 AM CDT SAT AUG 11 2007 MNC079-111045- /O.CON.KMPX.SV.W.0285.000000T0000Z-070811T1045Z/ LE SUEUR MN- 458 AM CDT SAT AUG 11 2007 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 545 AM CDT FOR LE SUEUR COUNTY... AT 455 AM CDT...DOPPLER RADAR CONTINUED TO INDICATE A SEVERE THUNDERSTORM...CAPABLE OF PRODUCING DAMAGING WINDS IN EXCESS OF 60 MPH. THIS STORM WAS LOCATED NEAR KILKENNY...OR ABOUT 7 MILES SOUTH OF MONTGOMERY...AND MOVING SOUTHEAST AT 30 MPH. THE STORM HAS SHOWN SOME WEAKENING IN THE LAST 10 MINUTES BUT REMAINS A THREAT. OTHER LOCATIONS IN THE WARNING INCLUDE ST HENRY...MONTGOMERY...LE CENTER AND KILKENNY. LAT...LON 4450 9374 4434 9386 4421 9355 4447 9355 $$
000 WWUS53 KMPX 111018 SVSMPX SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 518 AM CDT SAT AUG 11 2007 MNC079-111028- /O.CAN.KMPX.SV.W.0285.000000T0000Z-070811T1045Z/ LE SUEUR MN- 518 AM CDT SAT AUG 11 2007 ...THE SEVERE THUNDERSTORM WARNING FOR LE SUEUR COUNTY IS CANCELLED... RADAR INDICATED THAT THE SEVERE THUNDERSTORM HAD WEAKENED AND MOVED OUT OF THE WARNED AREA. THUS THE WARNING HAS BEEN CANCELLED. LAT...LON 4450 9374 4434 9386 4421 9355 4447 9355 $$ JPR
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 10, 11:53 PM CDT | Severe Thunderstorm Warning | MPX | Lac qui Parle | 67 min |
| Aug 10, 11:59 PM CDT | Severe Thunderstorm Warning | MPX | Douglas | 46 min |
| Aug 11, 12:16 AM CDT | Severe Thunderstorm Warning | MPX | Stevens | 59 min |
| Aug 11, 12:28 AM CDT | Severe Thunderstorm Warning | MPX | Swift | 62 min |
| Aug 11, 12:34 AM CDT | Severe Thunderstorm Warning | MPX | Chippewa, Kandiyohi | 56 min |
| Aug 11, 12:52 AM CDT | Severe Thunderstorm Warning | MPX | Pope | 53 min |
| Aug 11, 1:07 AM CDT | Severe Thunderstorm Warning | MPX | Stearns | 53 min |
| Aug 11, 1:27 AM CDT | Severe Thunderstorm Warning | MPX | Douglas, Todd | 44 min |
| Aug 11, 1:34 AM CDT | Severe Thunderstorm Warning | MPX | Chippewa, Kandiyohi, Swift | 56 min |
| Aug 11, 1:47 AM CDT | Severe Thunderstorm Warning | MPX | Morrison | 58 min |
| Aug 11, 1:54 AM CDT | Severe Thunderstorm Warning | MPX | Meeker | 66 min |
| Aug 11, 1:57 AM CDT | Severe Thunderstorm Warning | MPX | Benton, Sherburne, Stearns, Wright | 63 min |
| Aug 11, 2:01 AM CDT | Severe Thunderstorm Warning | MPX | Renville | 59 min |
| Aug 11, 2:33 AM CDT | Severe Thunderstorm Warning | MPX | Carver, McLeod | 57 min |
| Aug 11, 2:44 AM CDT | Severe Thunderstorm Warning | MPX | Hennepin | 61 min |
| Aug 11, 2:53 AM CDT | Flash Flood Warning | MPX | Anoka, Hennepin, Ramsey | 3 hr |
| Aug 11, 2:53 AM CDT | Flash Flood Warning | MPX | Anoka, Dakota, Hennepin, Ramsey | 3 hr |
| Aug 11, 3:01 AM CDT | Severe Thunderstorm Warning | MPX | Wright | 29 min |
| Aug 11, 3:07 AM CDT | Flash Flood Warning | MPX | Wright | 113 min |
| Aug 11, 3:15 AM CDT | Severe Thunderstorm Warning | MPX | Sibley | 44 min |
| Aug 11, 3:27 AM CDT | Severe Thunderstorm Warning | MPX | Dakota, Ramsey, Washington | 63 min |
| Aug 11, 3:40 AM CDT | Flash Flood Warning | MPX | Scott | 65 min |
| Aug 11, 3:51 AM CDT | Severe Thunderstorm Warning | MPX | Goodhue | 54 min |
| Aug 11, 6:04 PM CDT | Severe Thunderstorm Warning | MPX | Meeker, Wright | 56 min |
| Aug 11, 6:39 PM CDT | Severe Thunderstorm Warning | MPX | Carver, McLeod | 66 min |
| Aug 11, 6:56 PM CDT | Severe Thunderstorm Warning | MPX | Wright | 49 min |
| Aug 11, 6:58 PM CDT | Severe Thunderstorm Warning | MPX | Hennepin | 62 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.