Alert archive / North Dakota / Severe Thunderstorm Warnings in 1999

Severe Thunderstorm Warning 52, NWS Bismarck, ND

June 21, 1999Burleigh County, Morton County, North Dakota

NWS Bismarck, ND issued this severe thunderstorm warning at Jun 21, 1999, 2:30 AM CDT for Burleigh County, Morton County, North Dakota. It was in force for 60 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
Jun 21, 1999, 2:30 AM CDT (07:30 UTC)
Expired
Jun 21, 1999, 3:30 AM CDT
In force
60 min
Issued by
NWS Bismarck, ND
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Burleigh County, ND, Morton County, ND

What was reported inside it

TimeReportWhereRemark
Jun 21, 3:25 AM CDTHail 0.75Moffit, 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.

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 7.5 hours before the alert went out and 16 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-pSkew-T log-p diagram, Bismarck Municip, ND at 00:00Z on 1999-06-21Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1451 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Bismarck Municip, ND at 00:00Z on 1999-06-21The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 46 square meters per square second.1939Sfc1 km3 km6 km9 kmRMLM
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
1451 J/kg
Mixed-layer CIN
-71 J/kg
Mixed-layer LCL
907 m above ground
0-6 km bulk shear
36 kt
0-1 km storm-relative helicity
46 m²/s²
0-3 km storm-relative helicity
118 m²/s²
Significant tornado parameter
0.3
Supercell composite
3.0

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 Jun 20, 3:20 PM CDT, 11 hours 10 minutes earlier.

Area forecast discussion, Jun 20, 3:20 PM CDT, 11 hours 10 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE BISMARCK ND
320 PM CDT SUN JUN 20 1999

SCATTERED SHOWERS/TSTMS OVER NRN HALF OF ND ATTM...AND STRONG/SVR
TSTMS IN NERN MT. MODELS HAVE VORT IN ERN MT AT 18Z PROGGED TO THE
ND/MT BORDER BY 00Z...THEN ETA HAS MORE REALISTIC PLACING OF VORT
OVER CNTRL ND BY 06Z TON. THINK THIS WL BE THE BEST FOCUS/TIMING OF
TSTMS. LIS WELL BELOW ZERO. CAPE THIS AM AT BIS WAS 2000...AND ETA
KEEPS CAPES WELL ABOVE 1500 THROUGH 48 HOURS. HERE AT BIS THE
CONVECTIVE TEMP IS IN THE MID 80S...BUT WITH H5 SHORTWAVE KICKER...
TSTMS SHOULD HAVE NO PROBLEM FIRING OFF. DEWPOINTS WELL INTO THE 60S
THIS AFTN. K INDEX WAS 33 THIS AM WITH PW OF 1.32. LARGE HAIL AND
HEAVY RAIN THE BIGGEST THREAT. HODOGRAPH NOT IMPRESSIVE FOR TORNADIC
ACTIVITY. ANTICIPATING WEATHER WATCH FOR WRN COUNTIES EITHER NOW OR
IN EARLY EVE HOURS...WITH POSSIBLE ADDITIONAL WATCHES CNTRL ND LATER.

FOR MON...H7 TEMPS BUILD UP AND FORM A CAP OVER WRN ND BY 18Z.
ANOTHER SHORTWAVE MOVING IN FROM WY SHOULD BREAK CAP BY LATE
AFTN/EARLY EVE. WL KEEP MENTION OF TSTMS UNTIL LATE AFTN IN THE
WEST...AND FOR MON NIGHT REST OF CWA. LOOKS LIKE ANOTHER DAY OF
SEVERE WEATHER MON NIGHT. SFC TROUGH/COLD FRONT FINALLY MOVES
THROUGH STA MON NIGHT AND TUE WITH A FEW H5 SHORTWAVES TO KEEP
SHOWERS/TSTMS IN THE FCST THROUGH TUE. GOOD NWLY WINDS BEHIND FRONT
TO BRING WINDY DAY TUE WITH COOLER TEMPS.

IN THE LONGER TERM...WED LOOKS LIKE A DRY DAY...BUT THU...AND ESP
FRI NIGHT LOOKING GOOD FOR PCPN.

.BIS...NONE.
JV

In the hours before

Local storm report, Jun 20, 11:00 PM CDT, 3 hours 30 minutes before
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Local storm report, Jun 20, 11:00 PM CDT, 3 hours 30 minutes before
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Special weather statement, Jun 21, 1:21 AM CDT, 1 hour 9 minutes before
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Special weather statement, Jun 21, 1:21 AM CDT, 1 hour 9 minutes before
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The office that day

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

IssuedProductOfficeCountiesLasted
Jun 20, 8:50 PM CDTSevere Thunderstorm WarningBISGolden Valley, Slope55 min
Jun 20, 9:00 PM CDTTornado WarningBISGolden Valley, Slope45 min
Jun 20, 9:47 PM CDTSevere Thunderstorm WarningBISBowman58 min
Jun 20, 10:00 PM CDTTornado WarningBISBowman45 min
Jun 20, 10:34 PM CDTSevere Thunderstorm WarningBISSlope26 min
Jun 20, 10:43 PM CDTSevere Thunderstorm WarningBISBowman47 min
Jun 21, 2:15 AM CDTSevere Thunderstorm WarningBISBurleigh, Oliver45 min
Jun 21, 7:16 AM CDTSevere Thunderstorm WarningBISEmmons, Logan, McIntosh44 min
Jun 21, 9:24 AM CDTSevere Thunderstorm WarningBISMcIntosh66 min
Jun 21, 9:35 AM CDTSevere Thunderstorm WarningBISLogan55 min
Jun 21, 10:30 AM CDTSevere Thunderstorm WarningBISMcIntosh30 min
Jun 21, 11:25 AM CDTSevere Thunderstorm WarningBISDickey30 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 1999Every severe thunderstorm warning in 1999

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.