Alert archive / Minnesota / Severe Thunderstorm Warnings in 2020
Severe Thunderstorm Warning 96, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 9, 2020, 11:40 PM CDT for Wright County, Minnesota. It was in force for 50 min. 10 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 9, 2020, 11:40 PM CDT (04:40 UTC)
- Expired
- Aug 10, 2020, 12:30 AM CDT
- In force
- 50 min
- Issued by
- NWS Twin Cities, MN
- Area
- Storm-based polygon
- Hail
- 1.5 in
- Wind
- 50.0 mph
County Wright County, MN
The radar
The Minneapolis radar (KMPX), 38 km from the middle of the area, began a volume at 04:42 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.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 9, 11:48 PM CDT | HAIL 2 | 2 Nne Montrose, MN | . |
| Aug 9, 11:48 PM CDT | HAIL 2 | 2 Nne Montrose, MN | |
| Aug 9, 11:50 PM CDT | HAIL 2 | Buffalo, MN | . |
| Aug 9, 11:50 PM CDT | HAIL 2 | Buffalo, MN | |
| Aug 10, 12:03 AM CDT | HAIL 2 | 4 Sse Buffalo, MN | . |
| Aug 10, 12:03 AM CDT | HAIL 2 | 4 Sse Buffalo, MN | |
| Aug 10, 12:08 AM CDT | HAIL 1 | Rockford, MN | . |
| Aug 10, 12:08 AM CDT | HAIL 1 | Rockford, MN | |
| Aug 10, 12:21 AM CDT | HAIL 1 | 4 Se Buffalo, MN | . |
| Aug 10, 12:21 AM CDT | HAIL 1 | 4 Se Buffalo, 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, 4.7 hours before the alert went out and 37 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
- 2342 J/kg
- Mixed-layer CIN
- -37 J/kg
- Mixed-layer LCL
- 1184 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 107 m²/s²
- 0-3 km storm-relative helicity
- 168 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 10.5
The text
As transmitted.
910
WUUS53 KMPX 100440
SVRMPX
MNC171-100530-
/O.NEW.KMPX.SV.W.0096.200810T0440Z-200810T0530Z/
BULLETIN - IMMEDIATE BROADCAST REQUESTED
Severe Thunderstorm Warning
National Weather Service Twin Cities/Chanhassen MN
1140 PM CDT Sun Aug 9 2020
The National Weather Service in The Twin Cities has issued a
* Severe Thunderstorm Warning for...
Central Wright County in central Minnesota...
* Until 1230 AM CDT.
* At 1140 PM CDT, a severe thunderstorm was located near Montrose, or
near Buffalo, moving east at 15 mph.
HAZARD...Ping pong ball size hail.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect
damage to roofs, siding, windows, and vehicles.
* Locations impacted include...
Buffalo, St. Michael, Otsego, Albertville, Delano, Rockford,
Montrose, Maple Lake, Hanover, Greenfield, Waverly and French Lake.
This includes the following highways...
Interstate 94 in Minnesota between mile markers 202 and 205.
U.S. Highway 12 between mile markers 128 and 140.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4524 9355 4522 9357 4520 9363 4521 9364
4519 9366 4516 9364 4513 9371 4509 9373
4506 9377 4499 9377 4514 9426 4524 9426
TIME...MOT...LOC 0440Z 284DEG 13KT 4512 9391
HAIL...1.50IN
WIND...<50MPH
$$
CEO2 follow-up statements
109
WWUS53 KMPX 100500
SVSMPX
Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
1200 AM CDT Mon Aug 10 2020
MNC171-100530-
/O.CON.KMPX.SV.W.0096.000000T0000Z-200810T0530Z/
Wright MN-
1200 AM CDT Mon Aug 10 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1230 AM CDT
FOR CENTRAL WRIGHT COUNTY...
At 1200 AM CDT, a severe thunderstorm was located near Rockford, or
near Buffalo, moving east at 15 mph.
HAZARD...Ping pong ball size hail.
SOURCE...Radar indicated.
IMPACT...People and animals outdoors will be injured. Expect damage
to roofs, siding, windows, and vehicles.
Locations impacted include...
Buffalo, St. Michael, Otsego, Albertville, Delano, Rockford,
Montrose, Maple Lake, Hanover, Greenfield, Buffalo Airport and
Rassat.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4524 9355 4522 9357 4520 9363 4521 9364
4519 9366 4516 9364 4513 9371 4509 9373
4506 9377 4499 9377 4514 9405 4524 9404
TIME...MOT...LOC 0500Z 284DEG 13KT 4510 9381
HAIL...1.50IN
WIND...<50MPH
$$
CEO455
WWUS53 KMPX 100513
SVSMPX
Severe Weather Statement
National Weather Service Twin Cities/Chanhassen MN
1213 AM CDT Mon Aug 10 2020
MNC171-100530-
/O.CON.KMPX.SV.W.0096.000000T0000Z-200810T0530Z/
Wright MN-
1213 AM CDT Mon Aug 10 2020
...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT UNTIL 1230 AM CDT
FOR SOUTHEASTERN WRIGHT COUNTY...
At 1213 AM CDT, a severe thunderstorm was located over Rockford, or 8
miles southeast of Buffalo, moving east at 15 mph.
HAZARD...Quarter size hail.
SOURCE...Radar indicated.
IMPACT...Damage to vehicles is expected.
Locations impacted include...
Buffalo, St. Michael, Delano, Rockford, Montrose, Hanover,
Greenfield, Buffalo Airport and Rassat.
PRECAUTIONARY/PREPAREDNESS ACTIONS...
For your protection move to an interior room on the lowest floor of a
building.
Torrential rainfall is occurring with this storm, and may lead to
flash flooding. Do not drive your vehicle through flooded roadways.
&&
LAT...LON 4522 9357 4520 9363 4521 9364 4519 9366
4516 9364 4513 9371 4509 9373 4506 9377
4499 9377 4512 9399 4521 9400
TIME...MOT...LOC 0513Z 284DEG 13KT 4509 9374
HAIL...1.00IN
WIND...<50MPH
$$
CEOThe office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 9, 7:52 PM CDT | Special Weather Statement | MPX | Hennepin | 23 min |
| Aug 9, 8:13 PM CDT | Special Weather Statement | MPX | Hennepin | 47 min |
| Aug 9, 8:47 PM CDT | Special Weather Statement | MPX | Scott | 88 min |
| Aug 9, 9:00 PM CDT | Special Weather Statement | MPX | Scott | 30 min |
| Aug 9, 9:21 PM CDT | Special Weather Statement | MPX | Carver | 54 min |
| Aug 9, 9:30 PM CDT | Severe Thunderstorm Warning | MPX | Carver | 45 min |
| Aug 9, 9:39 PM CDT | Severe Thunderstorm Warning | MPX | Hennepin, Scott | 51 min |
| Aug 9, 10:14 PM CDT | Special Weather Statement | MPX | Hennepin | 46 min |
| Aug 9, 10:27 PM CDT | Severe Thunderstorm Warning | MPX | Anoka, Hennepin, Sherburne, Wright | 48 min |
| Aug 9, 10:27 PM CDT | Severe Thunderstorm Warning | MPX | Dakota, Hennepin, Scott | 27 min |
| Aug 9, 10:48 PM CDT | Severe Thunderstorm Warning | MPX | Wright | 57 min |
| Aug 9, 11:16 PM CDT | Severe Thunderstorm Warning | MPX | Hennepin | 44 min |
| Aug 9, 11:56 PM CDT | Severe Thunderstorm Warning | MPX | Hennepin | 49 min |
| Aug 10, 12:28 AM CDT | Severe Thunderstorm Warning | MPX | Wright | 32 min |
| Aug 10, 12:41 AM CDT | Severe Thunderstorm Warning | MPX | Hennepin | 49 min |
| Aug 10, 12:42 AM CDT | Special Weather Statement | MPX | Hennepin | 63 min |
| Aug 10, 12:54 AM CDT | Severe Thunderstorm Warning | MPX | Carver, Hennepin | 51 min |
| Aug 10, 1:21 AM CDT | Severe Thunderstorm Warning | MPX | Dakota, Hennepin, Scott | 39 min |
| Aug 10, 1:29 AM CDT | Special Weather Statement | MPX | Hennepin | 61 min |
| Aug 10, 1:48 AM CDT | Flash Flood Warning | MPX | Carver, Hennepin, Scott | 4 hr |
| Aug 10, 1:57 AM CDT | Severe Thunderstorm Warning | MPX | Dakota, Hennepin, Washington | 48 min |
| Aug 10, 2:04 AM CDT | Severe Thunderstorm Warning | MPX | Meeker, Wright | 26 min |
| Aug 10, 2:08 AM CDT | Severe Thunderstorm Warning | MPX | Rice, Scott | 37 min |
| Aug 10, 2:20 AM CDT | Severe Thunderstorm Warning | MPX | Dakota, Scott | 40 min |
| Aug 10, 2:31 AM CDT | Severe Thunderstorm Warning | MPX | Wright | 44 min |
| Aug 10, 2:41 AM CDT | Severe Thunderstorm Warning | MPX | Dakota, Rice, Scott | 49 min |
| Aug 10, 2:43 AM CDT | Severe Thunderstorm Warning | MPX | Carver, Scott | 32 min |
| Aug 10, 3:06 AM CDT | Severe Thunderstorm Warning | MPX | Anoka, Hennepin | 54 min |
| Aug 10, 3:15 AM CDT | Severe Thunderstorm Warning | MPX | Kanabec, Mille Lacs | 45 min |
| Aug 10, 3:29 AM CDT | Severe Thunderstorm Warning | MPX | Dakota, Goodhue, Rice | 46 min |
| Aug 10, 3:34 AM CDT | Special Weather Statement | MPX | Sherburne | 56 min |
| Aug 10, 3:46 AM CDT | Severe Thunderstorm Warning | MPX | Rice | 44 min |
| Aug 10, 3:58 AM CDT | Special Weather Statement | MPX | Dakota | 32 min |
| Aug 10, 4:10 AM CDT | Severe Thunderstorm Warning | MPX | Goodhue, Rice | 50 min |
| Aug 10, 4:16 AM CDT | Severe Thunderstorm Warning | MPX | Steele, Waseca | 59 min |
| Aug 10, 5:08 AM CDT | Severe Thunderstorm Warning | MPX | Freeborn, Steele, Waseca | 22 min |
| Aug 10, 5:27 AM CDT | Severe Thunderstorm Warning | MPX | Goodhue, Rice | 17 min |
| Aug 10, 7:44 AM CDT | Special Weather Statement | MPX | Blue Earth | 31 min |
| Aug 10, 8:03 AM CDT | Special Weather Statement | MPX | Waseca | 27 min |
| Aug 10, 8:10 AM CDT | Severe Thunderstorm Warning | MPX | Waseca | 35 min |
| Aug 10, 8:36 AM CDT | Severe Thunderstorm Warning | MPX | Freeborn, Steele | 28 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.