Alert archive / North Dakota / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 112, NWS Bismarck, ND

July 30, 2002Adams County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Jul 30, 2002, 9:17 PM MDT for Adams County, North Dakota. It was in force for 58 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 30, 2002, 9:17 PM MDT (03:17 UTC)
Expired: Jul 30, 2002, 10:15 PM MDT
In force: 58 min
Issued by: NWS Bismarck, ND
Area: Counties, with a storm outline in the text

County Adams County, ND

What was reported inside it

Time	Report	Where	Remark
Jul 30, 9:55 PM MDT	Hail 1	Hettinger, 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 nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 3.3 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.

Skew-T log-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.

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

Open this sounding in Storm Lab

The text

As transmitted, in the capitals the NWS used until 2016.

140 
WUUS53 KBIS 310317
SVRBIS
NDC001-310415-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE BISMARCK ND
917 PM MDT TUE JUL 30 2002

THE NATIONAL WEATHER SERVICE IN BISMARCK HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  ADAMS COUNTY IN SOUTHWEST NORTH DAKOTA

* UNTIL 1015 PM MDT

* AT 917 PM MDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER REEDER...OR ABOUT 25 MILES EAST OF
  BOWMAN...MOVING EAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  BUCYRUS AT 925 PM MDT
  HETTINGER AT 940 PM MDT

VERY LARGE HAIL IS POSSIBLE WITH THIS SEVERE THUNDERSTORM. IF YOU ARE
IN THE PATH OF THE STORM...PUT YOUR CAR IN A GARAGE AND MOVE TO A
SUBSTANTIAL SHELTER.

LAT...LON 4624 10297 4598 10296 4597 10216 4620 10220

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, 6 hours 47 minutes earlier.

Area forecast discussion, Jul 30, 2:30 PM MDT, 6 hours 47 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

The office that day

Everything else NWS Bismarck, ND issued on the same UTC day.

Issued	Product	Office	Counties	Lasted
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, 1:28 AM MDT	Severe Thunderstorm Warning	BIS	Morton, Stark	47 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, 2002 Every 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.