Alert archive / Minnesota / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 82, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 8, 2020, 1:37 PM CDT for Chippewa County, Renville County, Yellow Medicine County, Minnesota. It was in force for 23 min. 3 reports 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 8, 2020, 1:37 PM CDT (18:37 UTC)
- Expired
- Aug 8, 2020, 2:00 PM CDT
- In force
- 23 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Hail
- 0.88 in
- Wind
- 60.0 mph
Counties Chippewa County, MN, Renville County, MN, Yellow Medicine County, MN
The radar
The Minneapolis radar (KMPX), 147 km from the middle of the area, began a volume at 18:38 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 8, 1:40 PM CDT | TSTM WND GST 69 | 4 Nw Granite Falls, MN | MEASURED WITH ANEMOMETER. |
| Aug 8, 1:57 PM CDT | TSTM WND DMG | 3 Ese Granite Falls, MN | MEASURED 22 INCH TREE SNAPPED AT BASE OFF HWY 212. |
| Aug 8, 1:59 PM CDT | TSTM WND DMG | Granite Falls, MN | WIDESPREAD TREE DAMAGE UP TO 44 INCHES IN DIAMETER. POWER OUTAGES AND ROOF DAMAGE. |
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 12:00Z, 6.6 hours before the alert went out and 144 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
- 1441 J/kg
- Mixed-layer CIN
- -202 J/kg
- Mixed-layer LCL
- 776 m above ground
- 0-6 km bulk shear
- 32 kt
- 0-1 km storm-relative helicity
- 250 m²/s²
- 0-3 km storm-relative helicity
- 273 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.9
The text
As transmitted.
487
WUUS53 KMPX 081837
SVRMPX
MNC023-129-173-081900-
/O.NEW.KMPX.SV.W.0082.200808T1837Z-200808T1900Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
137 PM CDT Sat Aug 8 2020
The National Weather Service in The Twin Cities has issued a
* Severe Thunderstorm Warning for...
Southeastern Chippewa County in west central Minnesota...
Northeastern Yellow Medicine County in west central Minnesota...
Northwestern Renville County in central Minnesota...
* Until 200 PM CDT.
* At 137 PM CDT, a severe thunderstorm was located near Sacred Heart,
or 17 miles northwest of Redwood Falls, moving east at 45 mph.
HAZARD...60 mph wind gusts and nickel size hail.
SOURCE...Radar indicated.
IMPACT...Expect damage to roofs, siding, and trees.
* Locations impacted include...
Granite Falls, Olivia, Renville, Sacred Heart, Maynard, Danube,
Minnesota Falls and Bechyn.
This includes the following highways...
U.S. Highway 212 between mile markers 38 and 77.
U.S. Highway 71 between mile markers 95 and 104.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
Prepare immediately for large hail and damaging winds. People outside
should move immediately to shelter inside a strong building. Stay
away from windows.
Large hail and damaging winds and continuous cloud to ground
lightning is occurring with this storm. Move indoors immediately.
Lightning is one of nature's leading killers. Remember, if you can
hear thunder, you are close enough to be struck by lightning.
&&
LAT...LON 4492 9572 4489 9524 4484 9493 4458 9509
4467 9525 4466 9529 4469 9532 4475 9548
4478 9552 4479 9550 4482 9568 4489 9574
TIME...MOT...LOC 1837Z 273DEG 41KT 4472 9535
HAIL...0.88IN
WIND...60MPH
$$
ETAThe office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 12:12 PM CDT | Special Weather Statement | MPX | Lac qui Parle | 48 min |
| Aug 8, 12:38 PM CDT | Special Weather Statement | MPX | Yellow Medicine | 37 min |
| Aug 8, 12:45 PM CDT | Severe Thunderstorm Warning | MPX | Lac qui Parle, Yellow Medicine | 45 min |
| Aug 8, 1:14 PM CDT | Severe Thunderstorm Warning | MPX | Redwood, Yellow Medicine | 46 min |
| Aug 8, 2:03 PM CDT | Severe Thunderstorm Warning | MPX | Chippewa, Kandiyohi, Meeker, Redwood, Renville, Sibley | 42 min |
| Aug 8, 2:14 PM CDT | Special Weather Statement | MPX | Brown, Watonwan | 46 min |
| Aug 8, 2:28 PM CDT | Severe Thunderstorm Warning | MPX | Carver, McLeod, Meeker, Nicollet, Sibley | 47 min |
| Aug 8, 2:48 PM CDT | Severe Thunderstorm Warning | MPX | Kandiyohi, Meeker, Renville, Sibley, Wright | 27 min |
| Aug 8, 3:13 PM CDT | Special Weather Statement | MPX | Carver, Hennepin, McLeod, Meeker, Wright | 47 min |
| Aug 8, 3:17 PM CDT | Special Weather Statement | MPX | Blue Earth, Le Sueur, Rice, Scott, Waseca | 58 min |
| Aug 8, 4:11 PM CDT | Special Weather Statement | MPX | Rice, Steele, Waseca | 49 min |
| Aug 8, 4:28 PM CDT | Severe Thunderstorm Warning | MPX | Freeborn, Steele, Waseca | 47 min |
| Aug 8, 4:58 PM CDT | Severe Thunderstorm Warning | MPX | Goodhue, Rice, Steele | 36 min |
| Aug 8, 5:25 PM CDT | Severe Thunderstorm Warning | MPX | Dakota, Goodhue | 35 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 2020Every severe thunderstorm warning in 2020
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.