Alert archive / North Dakota / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 187, NWS Bismarck, ND
NWS Bismarck, ND issued this severe thunderstorm warning at Aug 27, 2002, 7:50 PM CDT for McHenry County, Pierce County, North Dakota. It was in force for 55 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Aug 27, 2002, 7:50 PM CDT (00:50 UTC)
- Expired
- Aug 27, 2002, 8:45 PM CDT
- In force
- 55 min
- Issued by
- NWS Bismarck, ND
- Area
- Counties, with a storm outline in the text
Counties McHenry County, ND, Pierce County, ND
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Aug 27, 7:50 PM CDT | Hail 1 | Anamoose, ND |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
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 27, 4:40 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 0.8 hours before the alert went out and 166 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
- 1222 J/kg
- Mixed-layer CIN
- -5 J/kg
- Mixed-layer LCL
- 2291 m above ground
- 0-6 km bulk shear
- 16 kt
- 0-1 km storm-relative helicity
- 0 m²/s²
- 0-3 km storm-relative helicity
- 31 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Bismarck, ND wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 27, 2:50 PM CDT, 5 hours earlier.
Area forecast discussion, Aug 27, 2:50 PM CDT, 5 hours before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BISMARCK ND 250 PM CDT TUE AUG 27 2002 A CONCERN EXISTS AGAIN THIS AFTERNOON AND EVENING FOR A FEW SEVERE THUNDERSTORMS...EXPECIALLY IN THE NORTHEAST PART OF THE FORECAST AREA WHERE MID LEVEL WESTERLY FLOW IS STRONGEST WITH DEEP VERTICAL SHEAR. THE CHANCE OF THUNDERSTORMS WILL DECREASE SHARPLY LATE TONIGHT AS THE WESTERN UPPER TROUGH SHEARS OFF WITH THE NORTHERN BRANCH MOVING INTO SOUTHERN MANITOBA. A SHORT DRY PERIOD IS LIKELY WED AND WED NIGHT...BUT A CHANCE OF THUNDERSTORMS WILL RETURN THURSDAY AS UPPER FLOW BECOMES SOUTHWEST IN ADVANCE OF A DIGGING WEST COAST TROUGH. FOR THE EXTENDED FORECAST...SHORT WAVES IN A SOUTHWEST FLOW WILL MAINTAIN A CHANCE OF THUNDERSTORMS INTO SUNDAY. THE MEDIUM RANGE MODELS THEN SHOW THE MAIN ENERGY SHIFTING NORTH INTO CANADA AS A CLOSED LOW DEVELOPS IN CENTRAL SASKATCHEWAN. THE MRF DEPICTS DRY PACIFIC HIGH PRESSURE ENTERING THE REGION MONDAY. .BIS...NONE. LM
In the hours before
Local storm report, Aug 27, 5:31 PM CDT, 2 hours 19 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
531 PM CDT TUE AUG 27 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0440 PM 6 SW KENMARE ND 1.75 INCH HAIL
08/27/02 WARD REPORTED BY PUBLIC.Local storm report, Aug 27, 5:49 PM CDT, 2 hours 1 minute before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
549 PM CDT TUE AUG 27 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0530 PM 8 S KENMARE ND .75 INCH HAIL
08/27/02 WARD REPORTED BY PUBLIC.Local storm report, Aug 27, 6:56 PM CDT, 54 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
656 PM CDT TUE AUG 27 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0650 PM 3 SW BALFOUR ND .75 INCH HAIL
08/27/02 MCHENRY REPORTED BY COOPERATIVE
OBSERVER.Local storm report, Aug 27, 7:10 PM CDT, 40 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
710 PM CDT TUE AUG 27 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
0700 PM 6 SSW BALFOUR ND 1.75 INCH HAIL
08/27/02 MCHENRY REPORTED BY PUBLIC.
HAIL SINCE 1845. STILL
HAILING.The office that day
Everything else NWS Bismarck, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 27, 7:24 PM CDT | Severe Thunderstorm Warning | BIS | Sheridan | 66 min |
| Aug 28, 4:54 PM CDT | Severe Thunderstorm Warning | BIS | McIntosh | 51 min |
Nearby
Severe Thunderstorm Warnings in North Dakota, 2002Every severe thunderstorm warning in 2002
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.