Alert archive / Minnesota / Special Weather Statements in 2017
Special Weather Statement, NWS Twin Cities, MN
NWS Twin Cities, MN issued this special weather statement at Jun 30, 2017, 7:21 PM CDT for Isanti 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
- Jun 30, 2017, 7:21 PM CDT (00:21 UTC)
- Expired
- Jun 30, 2017, 8:00 PM CDT
- In force
- 39 min
- Issued by
- NWS Twin Cities, MN
County Isanti County, MN
The radar
The Minneapolis radar (KMPX), 74 km from the middle of the area, began a volume at 00:22 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 nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 0.4 hours before the alert went out and 75 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
- 337 J/kg
- Mixed-layer CIN
- -43 J/kg
- Mixed-layer LCL
- 1484 m above ground
- 0-6 km bulk shear
- 24 kt
- 0-1 km storm-relative helicity
- 17 m²/s²
- 0-3 km storm-relative helicity
- 37 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.4
The text
As transmitted.
668
WWUS83 KMPX 010021
SPSMPX
Special Weather Statement
National Weather Service Twin Cities/Chanhassen MN
721 PM CDT FRI JUN 30 2017
MNZ052-010100-
Isanti-
721 PM CDT FRI JUN 30 2017
...A STRONG THUNDERSTORM WILL AFFECT SOUTHERN ISANTI COUNTY
THROUGH 800 PM CDT...
At 720 PM CDT, a strong thunderstorm was located over Spencer Brook,
or 10 miles west of Cambridge, moving southeast at 20 mph.
Winds in excess of 30 mph and dime size hail are possible with this
storm.
Locations impacted through 800 PM CDT include...
Cambridge, St. Francis, Isanti, Athens, Spencer Brook and Weber.
Torrential rainfall is also occurring with this storm, and may cause
localized flooding. Do not drive your vehicle through flooded
roadways.
Frequent cloud to ground lightning is occurring with this storm.
Lightning can strike 10 miles away from a thunderstorm. Seek a safe
shelter inside a building or vehicle.
This storm may intensify, so be certain to monitor local radio
stations and available television stations for additional information
and possible warnings from the National Weather Service.
To report severe weather, contact your nearest law enforcement
agency. They can relay your report to the National Weather Service
office in The Twin Cities.
LAT...LON 4546 9308 4541 9328 4541 9341 4556 9351
4562 9344
TIME...MOT...LOC 0020Z 314DEG 17KT 4556 9345
$$
JPCThe office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 30, 7:15 PM CDT | Special Weather Statement | MPX | McLeod | 45 min |
| Jun 30, 8:28 PM CDT | Special Weather Statement | MPX | Isanti | 62 min |
| Jun 30, 8:50 PM CDT | Special Weather Statement | MPX | Blue Earth | 40 min |
| Jun 30, 8:56 PM CDT | Severe Thunderstorm Warning | MPX | Blue Earth | 34 min |
| Jun 30, 9:23 PM CDT | Special Weather Statement | MPX | Isanti | 37 min |
| Jun 30, 9:38 PM CDT | Special Weather Statement | MPX | Hennepin | 52 min |
| Jun 30, 10:26 PM CDT | Special Weather Statement | MPX | Faribault | 34 min |
| Jun 30, 10:34 PM CDT | Special Weather Statement | MPX | Polk | 41 min |
Nearby
Special Weather Statements in Minnesota, 2017Every special weather statement in 2017
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.