Alert archive / Minnesota / Severe Thunderstorm Warnings in 2012
Severe Thunderstorm Warning 73, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 12, 2012, 6:47 PM CDT for Norman County, Minnesota. It was in force for 35 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
- Jul 12, 2012, 6:47 PM CDT (23:47 UTC)
- Expired
- Jul 12, 2012, 7:22 PM CDT
- In force
- 35 min
- Issued by
- NWS Grand Forks, ND
- Area
- Storm-based polygon
- Hail
- 1.5 in
- Wind
- 60.0 mph
County Norman County, MN
The radar
The Fargo/Grand Forks radar (KMVX), 76 km from the middle of the area, began a volume at 23:47 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 |
|---|---|---|---|
| Jul 12, 6:50 PM CDT | HAIL 0.75 | 2 Sw Ada, 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, 11.8 hours before the alert went out and 263 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
- 80 J/kg
- Mixed-layer CIN
- -183 J/kg
- Mixed-layer LCL
- 1401 m above ground
- 0-6 km bulk shear
- 4 kt
- 0-1 km storm-relative helicity
- -24 m²/s²
- 0-3 km storm-relative helicity
- 1 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- -0.1
The text
As transmitted, in the capitals the NWS used until 2016.
404 WUUS53 KFGF 122347 SVRFGF MNC107-130045- /O.NEW.KFGF.SV.W.0073.120712T2347Z-120713T0045Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 647 PM CDT THU JUL 12 2012 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORMAN COUNTY IN NORTHWEST MINNESOTA... * UNTIL 745 PM CDT * AT 642 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING PING PONG BALL SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THE STORM WAS LOCATED 3 MILES SOUTHWEST OF ADA...OR 30 MILES NORTHEAST OF FARGO...MOVING TO THE EAST AT 20 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... TWIN VALLEY AROUND 720 PM CDT. GARY AND FLAMING AROUND 725 PM CDT. WAUKON AND FAITH AROUND 740 PM CDT. RANUM AROUND 745 PM CDT. PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. && LAT...LON 4749 9607 4722 9608 4720 9673 4742 9675 TIME...MOT...LOC 2348Z 260DEG 19KT 4729 9651 WIND...HAIL 60MPH 1.50IN $$ BRAMER
2 follow-up statements
423 WWUS53 KFGF 130012 SVSFGF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 712 PM CDT THU JUL 12 2012 MNC107-130045- /O.CON.KFGF.SV.W.0073.000000T0000Z-120713T0045Z/ NORMAN MN- 712 PM CDT THU JUL 12 2012 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR EASTERN NORMAN COUNTY IN NORTHWEST MINNESOTA UNTIL 745 PM CDT... AT 710 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING QUARTER SIZE HAIL...AND DAMAGING WINDS IN EXCESS OF 60 MPH. THE STORM WAS LOCATED 4 MILES EAST OF ADA...OR 33 MILES NORTHEAST OF FARGO...MOVING TO THE EAST AT 20 MPH. THE SEVERE THUNDERSTORM WILL BE NEAR... TWIN VALLEY...GARY AND FLAMING AROUND 735 PM CDT. WAUKON...RANUM AND FAITH AROUND 745 PM CDT. PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. && LAT...LON 4749 9607 4722 9608 4721 9657 4743 9657 TIME...MOT...LOC 0012Z 264DEG 17KT 4728 9642 WIND...HAIL 60MPH 1.00IN $$ BRAMER
105 WWUS53 KFGF 130022 SVSFGF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 722 PM CDT THU JUL 12 2012 MNC107-130032- /O.CAN.KFGF.SV.W.0073.000000T0000Z-120713T0045Z/ NORMAN MN- 722 PM CDT THU JUL 12 2012 ...THE SEVERE THUNDERSTORM WARNING FOR EASTERN NORMAN COUNTY IN NORTHWEST MINNESOTA IS CANCELLED... THE STORM WHICH PROMPTED THE WARNING HAS WEAKENED BELOW SEVERE LIMITS...AND NO LONGER POSES AN IMMEDIATE THREAT TO LIFE OR PROPERTY. HOWEVER HEAVY RAIN IS STILL POSSIBLE WITH THIS THUNDERSTORM. LAT...LON 4749 9607 4722 9608 4721 9657 4743 9657 TIME...MOT...LOC 0022Z 264DEG 17KT 4727 9640 $$ BRAMER
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 12, 4:15 PM CDT | Tornado Warning | FGF | Polk | 45 min |
| Jul 12, 4:22 PM CDT | Special Weather Statement | FGF | Norman | 53 min |
| Jul 12, 5:03 PM CDT | Severe Thunderstorm Warning | FGF | Polk | 57 min |
| Jul 12, 5:21 PM CDT | Special Weather Statement | FGF | Kittson | 54 min |
| Jul 12, 5:41 PM CDT | Severe Thunderstorm Warning | FGF | Lake of the Woods, Roseau | 25 min |
| Jul 12, 6:10 PM CDT | Special Weather Statement | FGF | Lake of the Woods | 65 min |
| Jul 12, 6:15 PM CDT | Special Weather Statement | FGF | Polk | 60 min |
| Jul 12, 6:18 PM CDT | Special Weather Statement | FGF | Norman | 57 min |
| Jul 12, 6:22 PM CDT | Special Weather Statement | FGF | Kittson | 53 min |
| Jul 12, 6:39 PM CDT | Severe Thunderstorm Warning | FGF | Roseau | 51 min |
| Jul 12, 6:45 PM CDT | Severe Thunderstorm Warning | FGF | Clay | 60 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.