Alert archive / Minnesota / Severe Thunderstorm Warnings in 2011
Severe Thunderstorm Warning 71, NWS Grand Forks, ND
NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 16, 2011, 9:44 PM CDT for Kittson County, Marshall County, Roseau County, Minnesota. It was in force for 61 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 16, 2011, 9:44 PM CDT (02:44 UTC)
- Expired
- Jul 16, 2011, 10:45 PM CDT
- In force
- 61 min
- Issued by
- NWS Grand Forks, ND
- Area
- Storm-based polygon
- Hail
- 1.0 in
- Wind
- 50.0 mph
Counties Kittson County, MN, Marshall County, MN, Roseau County, MN
The radar
The Fargo/Grand Forks radar (KMVX), 146 km from the middle of the area, began a volume at 02:44 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 16, 10:28 PM CDT | HAIL 1 | 1 E Strathcona, MN | DECK COVERED WITH QUARTER SIZED HAIL...SOME BIGGER BUT NOT AS LARGE AS HALF DOLLARS |
Local storm reports filed while the alert was in force, from inside its polygon or its counties.
The watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 16, 4:57 PM CDT | Tornado Watch | SPC | 7 hr |
The nearest sounding before it
International Fa, MN (KINL), launched 00:00Z, 2.7 hours before the alert went out and 209 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
- 1181 J/kg
- Mixed-layer CIN
- -107 J/kg
- Mixed-layer LCL
- 1398 m above ground
- 0-6 km bulk shear
- 38 kt
- 0-1 km storm-relative helicity
- 121 m²/s²
- 0-3 km storm-relative helicity
- 115 m²/s²
- Significant tornado parameter
- 0.2
- Supercell composite
- 4.9
The text
As transmitted, in the capitals the NWS used until 2016.
651 WUUS53 KFGF 170244 SVRFGF MNC069-089-135-170345- /O.NEW.KFGF.SV.W.0071.110717T0244Z-110717T0345Z/ BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 944 PM CDT SAT JUL 16 2011 THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHEASTERN KITTSON COUNTY IN NORTHWEST MINNESOTA... NORTH CENTRAL MARSHALL COUNTY IN NORTHWEST MINNESOTA... SOUTHWESTERN ROSEAU COUNTY IN NORTHWEST MINNESOTA... * UNTIL 1045 PM CDT * AT 940 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL. THE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 6 MILES NORTHEAST OF STRATHCONA TO 6 MILES WEST OF KARLSTAD...MOVING TO THE EAST AT 20 MPH. * SEVERE THUNDERSTORMS WILL BE NEAR... HALMA AROUND 950 PM CDT. GREENBUSH AROUND 1045 PM CDT. PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. && LAT...LON 4848 9579 4850 9674 4873 9665 4870 9576 TIME...MOT...LOC 0245Z 266DEG 18KT 4859 9601 4858 9661 WIND...HAIL <50MPH 1.00IN $$ DK
1 follow-up statement
624 WWUS53 KFGF 170305 SVSFGF SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND 1005 PM CDT SAT JUL 16 2011 MNC069-089-135-170345- /O.CON.KFGF.SV.W.0071.000000T0000Z-110717T0345Z/ KITTSON MN-ROSEAU MN-MARSHALL MN- 1005 PM CDT SAT JUL 16 2011 ...A SEVERE THUNDERSTORM WARNING REMAINS IN EFFECT FOR NORTH CENTRAL MARSHALL...SOUTHWESTERN ROSEAU AND SOUTHEASTERN KITTSON COUNTIES IN NORTHWEST MINNESOTA UNTIL 1045 PM CDT... AT 1003 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS CAPABLE OF PRODUCING QUARTER SIZE HAIL. THE STORMS WERE LOCATED ALONG A LINE EXTENDING FROM 6 MILES WEST OF TORFIN TO 2 MILES EAST OF KARLSTAD...MOVING TO THE EAST AT 20 MPH. SEVERE THUNDERSTORMS WILL BE NEAR... GREENBUSH AROUND 1045 PM CDT. PRECAUTIONARY/PREPAREDNESS ACTIONS... REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. && LAT...LON 4848 9579 4850 9674 4873 9665 4870 9576 TIME...MOT...LOC 0305Z 266DEG 18KT 4860 9586 4859 9646 $$ DK
The office that day
Everything else NWS Grand Forks, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 16, 7:54 PM CDT | Tornado Warning | FGF | Kittson, Marshall | 51 min |
| Jul 16, 8:42 PM CDT | Tornado Warning | FGF | Kittson, Marshall, Roseau | 48 min |
| Jul 16, 9:34 PM CDT | Flash Flood Warning | FGF | Kittson, Roseau | 9 hr |
| Jul 16, 10:38 PM CDT | Severe Thunderstorm Warning | FGF | Beltrami, Marshall, Roseau | 37 min |
| Jul 16, 10:41 PM CDT | Areal Flood Advisory | FGF | Kittson, Marshall | 8 hr |
| Jul 16, 11:08 PM CDT | Severe Thunderstorm Warning | FGF | Marshall | 52 min |
| Jul 16, 11:20 PM CDT | Severe Thunderstorm Warning | FGF | Kittson, Roseau | 40 min |
| Jul 17, 12:56 AM CDT | Severe Thunderstorm Warning | FGF | Beltrami, Clearwater, Lake of the Woods, Marshall, Pennington | 64 min |
| Jul 17, 1:53 AM CDT | Severe Thunderstorm Warning | FGF | Beltrami | 37 min |
| Jul 17, 2:25 AM CDT | Severe Thunderstorm Warning | FGF | Beltrami | 25 min |
| Jul 17, 3:01 AM CDT | Severe Thunderstorm Warning | FGF | Beltrami | 59 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 2011Every severe thunderstorm warning in 2011
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.