Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 38, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Jun 21, 2012, 5:57 PM CDT for Marshall County, Minnesota. It was in force for 30 min. 1 report 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
- Jun 21, 2012, 5:57 PM CDT (22:57 UTC)
- Expired
- Jun 21, 2012, 6:27 PM CDT
- In force
- 30 min
- Issued by
- NWS Grand Forks, ND
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 60.0 mph
County Marshall County, MN
The radar
The Fargo/Grand Forks radar (KMVX), 96 km from the middle of the area, began a volume at 22:58 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 |
|---|---|---|---|
| Jun 21, 6:00 PM CDT | HAIL 1 | 7 W Argyle, MN |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The nearest sounding before it
International Fa, MN (KINL), launched 12:00Z, 11.0 hours before the alert went out and 254 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
- 13 J/kg
- Mixed-layer CIN
- -14 J/kg
- Mixed-layer LCL
- 592 m above ground
- 0-6 km bulk shear
- 36 kt
- 0-1 km storm-relative helicity
- 23 m²/s²
- 0-3 km storm-relative helicity
- 59 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
716 WUUS53 KFGF 212257 SVRFGF MNC089-212345- /O.NEW.KFGF.SV.W.0038.120621T2257Z-120621T2345Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 557 PM CDT THU JUN 21 2012 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WESTERN MARSHALL COUNTY IN NORTHWEST MINNESOTA... * UNTIL 645 PM CDT * AT 553 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THE STORM WAS LOCATED 5 MILES SOUTHWEST OF STEPHEN...OR 21 MILES EAST OF GRAFTON...MOVING TO THE SOUTHEAST AT 25 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... ARGYLE AROUND 610 PM CDT. ALVARADO AROUND 615 PM CDT. MARCH AROUND 625 PM CDT. OLD MILL STATE PARK AROUND 630 PM CDT. THEREAFTER SOME OTHER LOCATIONS IMPACTED BY THE SEVERE THUNDERSTORM INCLUDE WARREN...RADIUM AND VIKING. PRECAUTIONARY/PREPAREDNESS ACTIONS... DURING THUNDERSTORMS YOU SHOULD MOVE INSIDE A STRONG BUILDING. DO NOT STAND BY WINDOWS. DO NOT USE TELEPHONES OR ELECTRICAL APPLIANCES. && LAT...LON 4817 9634 4819 9706 4840 9711 4854 9677 TIME...MOT...LOC 2257Z 315DEG 20KT 4838 9693 WIND...HAIL 60MPH 1.00IN $$ JAR
1 follow-up statement
947 WWUS53 KFGF 212327 SVSFGF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 627 PM CDT THU JUN 21 2012 MNC089-212337- /O.CAN.KFGF.SV.W.0038.000000T0000Z-120621T2345Z/ MARSHALL MN- 627 PM CDT THU JUN 21 2012 ...THE SEVERE THUNDERSTORM WARNING FOR WESTERN MARSHALL COUNTY IN NORTHWEST MINNESOTA IS CANCELLED... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED AND MOVED OUT OF THE WARNED AREA. HOWEVER GUSTY WINDS AND HEAVY RAIN ARE STILL POSSIBLE WITH THIS THUNDERSTORM. LAT...LON 4817 9634 4819 9706 4840 9711 4854 9677 TIME...MOT...LOC 2327Z 315DEG 20KT 4826 9675 $$ JAR
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 20, 7:14 PM CDT | Special Weather Statement | FGF | Marshall | 31 min |
| Jun 20, 9:30 PM CDT | Special Weather Statement | FGF | Mahnomen | 30 min |
| Jun 21, 4:15 PM CDT | Special Weather Statement | FGF | Kittson | 60 min |
| Jun 21, 4:23 PM CDT | Severe Thunderstorm Warning | FGF | Kittson | 42 min |
| Jun 21, 5:05 PM CDT | Special Weather Statement | FGF | Marshall | 55 min |
| Jun 21, 5:37 PM CDT | Special Weather Statement | FGF | Marshall | 68 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 2012Every severe thunderstorm warning in 2012
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.