Alert archive / North Dakota / Tornado Warnings in 2011
Tornado Warning 92, NWS Bismarck, ND
NWS Bismarck, ND issued this tornado warning at Aug 15, 2011, 4:41 PM MDT for 4 counties in North Dakota. It was in force for 34 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
- Aug 15, 2011, 4:41 PM MDT (22:41 UTC)
- Expired
- Aug 15, 2011, 5:15 PM MDT
- In force
- 34 min
- Issued by
- NWS Bismarck, ND
- Area
- Storm-based polygon
Counties Dunn County, ND, Mercer County, ND, Morton County, ND, Stark County, ND
The radar
The Bismarck radar (KBIS), 112 km from the middle of the area, began a volume at 22:43 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 15, 4:57 PM MDT | HAIL 1.75 | 5 N Richardton, ND | HAIL STARTED APPROX AT 557 PM CDT AND WAS STILL OCCURRING WHEN REPORTED AT 610 PM CDT. |
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 |
|---|---|---|---|
| Aug 15, 4:23 PM MDT | Severe Thunderstorm Watch | SPC | 9 hr |
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 12:00Z, 10.7 hours before the alert went out and 116 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 7951 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- -27 m²/s²
- 0-3 km storm-relative helicity
- 119 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
355 WFUS53 KBIS 152241 TORBIS NDC025-057-059-089-152315- /O.NEW.KBIS.TO.W.0092.110815T2241Z-110815T2315Z/ BULLETIN - EAS ACTIVATION REQUESTED TORNADO WARNING NATIONAL WEATHER SERVICE BISMARCK ND 441 PM MDT MON AUG 15 2011 THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A * TORNADO WARNING FOR... SOUTHEASTERN DUNN COUNTY IN SOUTHWEST NORTH DAKOTA... SOUTHWESTERN MERCER COUNTY IN SOUTH CENTRAL NORTH DAKOTA... NORTHWESTERN MORTON COUNTY IN SOUTH CENTRAL NORTH DAKOTA... NORTHEASTERN STARK COUNTY IN SOUTHWEST NORTH DAKOTA... * UNTIL 515 PM MDT/615 PM CDT/ * AT 438 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR HIRSCHVILLE...OR 19 MILES NORTHEAST OF DICKINSON...AND MOVING SOUTHEAST AT 35 MPH. * LOCATIONS IMPACTED INCLUDE... MARSHALL...RICHARDTON AND HEBRON. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS. REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE IN BISMARCK AT 701-223-4582. && LAT...LON 4720 10185 4677 10199 4697 10263 4719 10250 TIME...MOT...LOC 2242Z 295DEG 32KT 4703 10242 $$ MERRIMAN
1 follow-up statement
097 WWUS53 KBIS 152306 SVSBIS SEVERE WEATHER STATEMENT NATIONAL WEATHER SERVICE BISMARCK ND 606 PM CDT MON AUG 15 2011 NDC025-057-059-089-152315- /O.CON.KBIS.TO.W.0092.000000T0000Z-110815T2315Z/ MERCER ND-STARK ND-MORTON ND-DUNN ND- 506 PM MDT MON AUG 15 2011 ...A TORNADO WARNING REMAINS IN EFFECT FOR SOUTHEASTERN DUNN... NORTHWESTERN MORTON...NORTHEASTERN STARK AND SOUTHWESTERN MERCER COUNTIES UNTIL 515 PM MDT/615 PM CDT/... AT 506 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM CAPABLE OF PRODUCING A TORNADO. THIS DANGEROUS STORM WAS LOCATED NEAR RICHARDTON...OR 24 MILES EAST OF DICKINSON... MOVING SOUTHEAST AT 25 MPH. LOCATIONS IMPACTED INCLUDE... HEBRON. PRECAUTIONARY/PREPAREDNESS ACTIONS... TAKE COVER NOW. MOVE TO AN INTERIOR ROOM ON THE LOWEST FLOOR OF A STURDY BUILDING. AVOID WINDOWS. IF IN A MOBILE HOME...A VEHICLE OR OUTDOORS...MOVE TO THE CLOSEST SUBSTANTIAL SHELTER AND PROTECT YOURSELF FROM FLYING DEBRIS. REPORT SEVERE WEATHER TO THE NATIONAL WEATHER SERVICE IN BISMARCK AT 701-223-4582. && LAT...LON 4719 10241 4720 10185 4677 10199 4693 10251 TIME...MOT...LOC 2307Z 311DEG 20KT 4692 10227 $$ MERRIMAN
The office that day
Everything else NWS Bismarck, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 14, 7:22 PM MDT | Severe Thunderstorm Warning | BIS | Emmons, Logan, McIntosh | 53 min |
| Aug 14, 8:18 PM MDT | Areal Flood Advisory | BIS | Emmons, Logan, McIntosh, Morton | 6 hr |
| Aug 14, 8:30 PM MDT | Severe Thunderstorm Warning | BIS | Divide, Williams | 51 min |
| Aug 14, 9:14 PM MDT | Flash Flood Warning | BIS | Emmons, Morton | 6 hr |
| Aug 14, 10:27 PM MDT | Severe Thunderstorm Warning | BIS | Divide, Williams | 63 min |
| Aug 14, 11:23 PM MDT | Severe Thunderstorm Warning | BIS | Morton, Oliver | 67 min |
| Aug 15, 12:48 AM MDT | Severe Thunderstorm Warning | BIS | McKenzie | 57 min |
| Aug 15, 1:44 AM MDT | Severe Thunderstorm Warning | BIS | Dunn, McKenzie, McLean, Mountrail | 61 min |
| Aug 15, 2:46 AM MDT | Severe Thunderstorm Warning | BIS | Dunn, Mercer | 59 min |
| Aug 15, 3:04 AM MDT | Areal Flood Warning | BIS | Emmons, Morton | 7 hr |
| Aug 15, 3:23 AM MDT | Severe Thunderstorm Warning | BIS | McLean, Mercer | 50 min |
| Aug 15, 3:46 AM MDT | Severe Thunderstorm Warning | BIS | Mercer, Oliver | 29 min |
| Aug 15, 4:10 AM MDT | Severe Thunderstorm Warning | BIS | Burleigh, McLean, Mercer, Morton, Oliver | 65 min |
| Aug 15, 7:19 AM MDT | Severe Thunderstorm Warning | BIS | Dickey, LaMoure | 56 min |
| Aug 15, 4:12 PM MDT | Severe Thunderstorm Warning | BIS | Dunn, Stark | 63 min |
| Aug 15, 4:23 PM MDT | Severe Thunderstorm Warning | BIS | Bowman, Slope | 67 min |
| Aug 15, 5:14 PM MDT | Severe Thunderstorm Warning | BIS | Dunn, Mercer, Morton, Stark | 20 min |
| Aug 15, 5:18 PM MDT | Severe Thunderstorm Warning | BIS | Bottineau, Renville | 38 min |
| Aug 15, 5:20 PM MDT | Severe Thunderstorm Warning | BIS | Adams, Bowman, Hettinger, Slope | 55 min |
Nearby
Tornado Warnings in North Dakota, 2011Every tornado warning in 2011Tornadoes 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.