Alert archive / North Dakota / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 115, NWS Bismarck, ND
NWS Bismarck, ND issued this severe thunderstorm warning at Jul 31, 2002, 1:28 AM MDT for Morton County, Stark County, North Dakota. It was in force for 47 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jul 31, 2002, 1:28 AM MDT (07:28 UTC)
- Expired
- Jul 31, 2002, 2:15 AM MDT
- In force
- 47 min
- Issued by
- NWS Bismarck, ND
- Area
- Counties, with a storm outline in the text
Counties Morton County, ND, Stark County, ND
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 nearest sounding before it
Bismarck Municip, ND (KBIS), launched 00:00Z, 7.5 hours before the alert went out and 115 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
- 2749 m above ground
- 0-6 km bulk shear
- 52 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 38 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
545 WUUS53 KBIS 310728 SVRBIS NDC059-089-310815- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE BISMARCK ND 127 AM MDT WED JUL 31 2002 THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHWESTERN MORTON COUNTY IN SOUTH CENTRAL NORTH DAKOTA NORTHEASTERN STARK COUNTY IN SOUTHWEST NORTH DAKOTA * UNTIL 215 AM MDT * AT 127 AM MDT...SKYWARN SPOTTERS REPORTED A SEVERE THUNDERSTORM OVER RICHARDTON...OR ABOUT 22 MILES EAST OF DICKINSON...MOVING EAST AT 35 MPH. * THE SEVERE THUNDERSTORM WILL BE NEAR... HEBRON AT 135 AM MDT GLEN ULLIN AT 155 AM MDT LAT...LON 4698 10247 4684 10263 4673 10166 4698 10175
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 Jul 30, 2:30 PM MDT, 10 hours 58 minutes earlier.
Area forecast discussion, Jul 30, 2:30 PM MDT, 10 hours 58 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE BISMARCK ND 330 PM CDT TUE JUL 30 2002 A COLD FRONTAL SYSTEM WILL PUSH ACROSS OUR FORECAST AREA LATE TONIGHT BRINGING A CHANCE OF THUNDERSTORMS. BECAUSE OF THE LACK OF A BERMUDA HIGH OVER THE SOUTHEAST U.S. DEWPOINTS WILL NOT REBOUND TO ANY GREAT EXTENT WITH THE APPROACH OF THIS SYSTEM. IN THE MID LEVELS A DRY ZONAL FLOW WILL CONTINUE THROUGH THE WEEKEND...HOWEVER SOME IMPULSES ALONG THE SOUTHERN PERIPHERY OF THE FLOW MAY PUSH ENOUGH VERTICAL MOTION NORTHWARD TO BRING A CHANCE OF SHOWERS TO THE STATE. WE MAY SEE SOME OVERNIGHT READINGS IN THE 40S WEDNESDAY AND THURSDAY NIGHT AS A COOL HIGH PRESSURE PUSHES SOUTH OUT OF CANADA. .BIS...NONE. RSL
In the hours before
Special weather statement, Jul 30, 10:08 PM MDT, 3 hours 20 minutes before
NDZ009-017-310708- SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE WILLISTON ND 1108 PM CDT TUE JUL 30 2002 AT 1104 PM CDT LOCAL RADAR INDICATED A THUNDERSTORM ENTERING WESTERN WILLIAMS AND MCKENZIE COUNTIES MOVING EAST. THE THUNDERSTORM IS EXPECTED TO CONTINUE MOVING EAST THROUGH THE COUNTIES DURING THE LATE EVENING AND EARLY MORNING HOURS. PERIODS OF LIGHT RAIN AND BRIEF GUSTY WINDS CAN BE EXPECTED WITH THIS STORM. USE CAUTION TO ASSURE SAFETY DURING OUTDOOR ACTIVITY. ASSID
Local storm report, Jul 30, 10:17 PM MDT, 3 hours 11 minutes before
PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE BISMARCK ND
1117 PM CDT TUE JUL 30 2002
TIME(CDT) .....CITY LOCATION.....STATE ...EVENT/REMARKS...
....COUNTY LOCATION....
1055 PM 5 E HETTINGER ND 1 INCH HAIL
07/30/02 ADAMS REPORTED BY LAW
ENFORCEMENT OFFICIAL.The office that day
Everything else NWS Bismarck, ND issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 30, 9:17 PM MDT | Severe Thunderstorm Warning | BIS | Adams | 58 min |
| Jul 30, 10:26 PM MDT | Severe Thunderstorm Warning | BIS | Golden Valley, McKenzie | 64 min |
| Jul 30, 11:08 PM MDT | Severe Thunderstorm Warning | BIS | Sioux | 67 min |
| Jul 31, 2:29 AM MDT | Severe Thunderstorm Warning | BIS | Morton | 61 min |
| Jul 31, 3:17 PM MDT | Severe Thunderstorm Warning | BIS | McHenry | 58 min |
| Jul 31, 4:08 PM MDT | Severe Thunderstorm Warning | BIS | Pierce | 67 min |
| Jul 31, 4:10 PM MDT | Severe Thunderstorm Warning | BIS | Ward | 50 min |
| Jul 31, 4:40 PM MDT | Severe Thunderstorm Warning | BIS | McLean | 65 min |
| Jul 31, 5:17 PM MDT | Severe Thunderstorm Warning | BIS | McHenry, Ward | 58 min |
| Jul 31, 5:30 PM MDT | Severe Thunderstorm Warning | BIS | Pierce | 45 min |
| Jul 31, 5:58 PM MDT | Severe Thunderstorm Warning | BIS | Oliver | 47 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; the sounding from the Mesonet's radiosonde archive.