Alert archive / North Dakota / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 58, NWS Bismarck, ND

July 3, 2001Grant County, Sioux County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Jul 3, 2001, 3:13 PM MDT for Grant County, Sioux County, North Dakota. It was in force for 32 min. 2 reports 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: Jul 3, 2001, 3:13 PM MDT (21:13 UTC)
Expired: Jul 3, 2001, 3:45 PM MDT
In force: 32 min
Issued by: NWS Bismarck, ND
Area: Whole counties; the outline is the Mesonet’s reconstruction

Counties Grant County, ND, Sioux County, ND

The radar

The Bismarck radar (KBIS), 74 km from the middle of the area, began a volume at 21:15 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 3, 3:15 PM MDT	Hail 1.75	Elgin, ND
Jul 3, 3:45 PM MDT	Hail 1.25	Selfridge, ND	The hail was reported along and north highway 12.

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.

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 9.2 hours before the alert went out and 77 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: 1876 m above ground
0-6 km bulk shear: 53 kt
0-1 km storm-relative helicity: -31 m²/s²
0-3 km storm-relative helicity: 95 m²/s²
Significant tornado parameter: 0.0
Supercell composite: 0.1

Open this sounding in Storm Lab

The text

The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.

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 3, 2:00 PM MDT, 1 hour 13 minutes earlier.

Area forecast discussion, Jul 3, 2:00 PM MDT, 1 hour 13 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BISMARCK ND
300 PM CDT TUE JUL 3 2001

SFC HIGH ADVANCING FROM THE NW INTO CNTRL ND WITH NWLY WINDS AND
DWPTS IN THE LOWER 50S. ATMOS UNSTABLE ENOUGH IN SWRN/FAR S CNTRL
ND...WITH CAPE VALUES 200-800...TO SET OFF ISOLATED AND ELEVATED
TSTMS THAT BEGAN AFTER SUNRISE AND CONTINUE TO DEVELOP THIS AFTN
NEAR CNTRL SD BORDER AND MOVE SEWD INTO SD AS THEY GROW STRONGER.
ETA FCST SOUNDINGS ALSO SUGGEST THIS AREA WOULD REACH CONVECTIVE
TEMPS IN THE LOWER 80S...AND CU FIELD BEGINNING TO DEVELOP FROM BIS
TO DIK AND SWD AS TEMPS RISE INTO THE LOW TO MID 80S. WL PUT EVE
POPS IN THIS AREA.

SFC HIGH PUSHES IN ON WED WITH RETURN SELY FLOW IN THE AFTN FAR
WEST. FCST SOUNDINGS SHOW TEMPS IN THE LOW TO MID 80S...BUT
CONVECTIVE TEMPS IN THE UPPER 80S AND IN THE 90S. DRY SFC AIR AND NO
CAPE TO SUPPORT DEVELOPMENT. ON THU...STRONG SLY FLOW INCREASES SFC
DWPTS AND AFTN CAPES REACH 1000 OR SO...BUT MID LEVEL CAP BUILDS TO
INHIBIT CONVECTIVE DEVELOPMENT. ETA HAS +12 TO +14 OVER MUCH OF CWA.
AVN HINTS AT MCS DEVELOPMENT LATE THU NIGHT ACROSS NRN ND AFTER EVE
CONVECTION IN ERN MT. IF CONVECTION DEVELOPS IN NERN MT IT COULD
CONTINUE NORTH OF THE CAP AT THE CANADIAN BORDER...BUT WL LEAVE OUT
CHC TSTMS LATE THU NIGHT FOR ISN AND MOT FOR NOW.

AVN HAS SFC TROUGH IN WRN ND FRI MORNING...AND ADVANCES IT ACROSS
THE STATE ON FRI...SO WL KEEP CHC TSTMS FOR FRI. NEXT HINT OF
CONVECTION IS SAT NIGHT/SUN MORNING FROM THE MRF...BUT ECMWF NOT AS
STRONG WITH THIS SHORTWAVE AND WL NOT MENTION IN EXTENDED. OTHERWISE
H500 RIDGE REMAINS IN PLACE WITH SEASONABLE TEMPS AND MAINLY DRY
WEATHER.

.BIS...NONE.
VINING

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 3, 2:41 PM MDT	Tornado Warning	BIS	Hettinger, Slope	49 min
Jul 3, 3:26 PM MDT	Tornado Warning	BIS	Adams	34 min
Jul 3, 3:59 PM MDT	Severe Thunderstorm Warning	BIS	Adams	31 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 2001 Every severe thunderstorm warning in 2001

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; radar from the NEXRAD Level II archive.