Alert archive / Minnesota / Severe Thunderstorm Warnings in 2007
Severe Thunderstorm Warning 299, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 11, 2007, 8:43 PM CDT for Nicollet County, Minnesota. It was in force for 62 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, 8:43 PM CDT (01:43 UTC)
- Expired
- Aug 11, 2007, 9:45 PM CDT
- In force
- 62 min
- Issued by
- NWS Twin Cities, MN
- Area
- Counties, with a storm outline in the text
County Nicollet County, MN
The radar
The Minneapolis radar (KMPX), 73 km from the middle of the area, began a volume at 01:46 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, 6:21 PM CDT | Severe Thunderstorm Watch | SPC | 6 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 1.7 hours before the alert went out and 72 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
- 3342 J/kg
- Mixed-layer CIN
- -4 J/kg
- Mixed-layer LCL
- 1149 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 11 m²/s²
- 0-3 km storm-relative helicity
- 56 m²/s²
- Significant tornado parameter
- 0.9
- Supercell composite
- 5.6
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS53 KMPX 120143 SVRMPX MNC103-120245- /O.NEW.KMPX.SV.W.0299.070812T0143Z-070812T0245Z/ BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 843 PM CDT SAT AUG 11 2007 THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NICOLLET COUNTY IN SOUTH CENTRAL MINNESOTA... * UNTIL 945 PM CDT * AT 842 PM 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 6 MILES NORTHEAST OF NICOLLET...OR ABOUT 8 MILES WEST OF ST PETER...AND MOVING EAST AT 25 MPH. * LOCATIONS IMPACTED INCLUDE... NORSELAND... SAINT PETER... 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 4445 9428 4428 9440 4416 9405 4445 9392 $$
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 11, 7:02 PM CDT | Severe Thunderstorm Warning | MPX | Ramsey, Washington | 58 min |
| Aug 11, 7:41 PM CDT | Severe Thunderstorm Warning | MPX | Carver, McLeod | 64 min |
| Aug 11, 7:55 PM CDT | Severe Thunderstorm Warning | MPX | Washington | 65 min |
| Aug 11, 7:57 PM CDT | Severe Thunderstorm Warning | MPX | Scott | 63 min |
| Aug 11, 8:01 PM CDT | Severe Thunderstorm Warning | MPX | Dakota | 59 min |
| Aug 11, 8:16 PM CDT | Severe Thunderstorm Warning | MPX | Le Sueur, Rice | 59 min |
| Aug 11, 8:26 PM CDT | Severe Thunderstorm Warning | MPX | Chisago, Isanti | 64 min |
| Aug 11, 8:32 PM CDT | Severe Thunderstorm Warning | MPX | Goodhue | 58 min |
| Aug 11, 8:58 PM CDT | Severe Thunderstorm Warning | MPX | Dakota | 32 min |
| Aug 11, 9:13 PM CDT | Severe Thunderstorm Warning | MPX | Le Sueur, Rice | 47 min |
| Aug 11, 9:36 PM CDT | Severe Thunderstorm Warning | MPX | Blue Earth, Steele, Waseca | 54 min |
| Aug 11, 10:27 PM CDT | Severe Thunderstorm Warning | MPX | Freeborn, Steele, Waseca | 63 min |
| Aug 11, 11:31 PM CDT | Severe Thunderstorm Warning | MPX | Freeborn | 27 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.