Alert archive / North Dakota / Tornado Warnings in 1999

Tornado Warning 39, NWS Grand Forks, ND

July 27, 1999Richland County, North Dakota

NWS Grand Forks, ND issued this tornado warning at Jul 27, 1999, 4:55 PM CDT for Richland County, North Dakota. It was in force for 35 min. 4 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 27, 1999, 4:55 PM CDT (21:55 UTC)
Expired
Jul 27, 1999, 5:30 PM CDT
In force
35 min
Issued by
NWS Grand Forks, ND
Area
Whole counties

County Richland County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 143 km from the middle of the area, began a volume at 21:57 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

TimeReportWhereRemark
Jul 27, 5:00 PM CDTThunderstorm Wind 67Wyndmere, ND
Jul 27, 5:00 PM CDTTornado F0Wyndmere, ND
Jul 27, 5:00 PM CDTThunderstorm Wind 52Wyndmere, NDTrees were blown down.
Jul 27, 5:00 PM CDTThunderstorm WindWyndmere, NDTrees were blown down in Wyndmere and some siding on a church was torn off.

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 watch it was issued in

The SPC watch in force over the same counties when this warning went out.

IssuedProductOfficeLasted
Jul 27, 2:30 PM CDTTornado WatchSPC6 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 12:00Z, 9.9 hours before the alert went out and 189 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, Aberdeen, SD at 12:00Z on 1999-07-27Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 3 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, Aberdeen, SD at 12:00Z on 1999-07-27The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 121 square meters per square second.19395878Sfc1 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
3 J/kg
Mixed-layer CIN
-442 J/kg
Mixed-layer LCL
1364 m above ground
0-6 km bulk shear
37 kt
0-1 km storm-relative helicity
121 m²/s²
0-3 km storm-relative helicity
155 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.

000 
TTAA00 KFAR 272156
TORFAR
NDC077-272230-

BULLETIN - EAS ACTIVATION REQUESTED
TORNADO WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
455 PM CDT TUE JUL 27 1999

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* TORNADO WARNING FOR...
  RICHLAND COUNTY IN SOUTHEASTERN NORTH DAKOTA

* UNTIL 530 PM CDT

* AT 454 PM CDT... NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED
  A TORNADO 19 MILES WEST OF WAHPETON OR 6 MILES WEST OF MOORETON...
  MOVING EAST AT 35 MPH.

* THE TORNADO IS EXPECTED TO BE NEAR...
  MOORETON AT 504 PM CDT
  WAHPETON AT 527 PM CDT

IF YOU ARE IN THE PATH OF A TORNADO THE SAFEST PLACE IS A BASEMENT.
GET UNDER A STAIRWAY OR A PIECE OF STURDY FURNITURE.

SOROKA

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 27, 2:07 PM CDTSevere Thunderstorm WarningFGFBarnes33 min
Jul 27, 2:34 PM CDTSevere Thunderstorm WarningFGFCass36 min
Jul 27, 2:49 PM CDTSevere Thunderstorm WarningFGFBarnes31 min
Jul 27, 3:00 PM CDTSevere Thunderstorm WarningFGFCass35 min
Jul 27, 3:12 PM CDTSevere Thunderstorm WarningFGFCass33 min
Jul 27, 3:19 PM CDTSevere Thunderstorm WarningFGFBarnes, Ransom36 min
Jul 27, 3:36 PM CDTSevere Thunderstorm WarningFGFCass29 min
Jul 27, 3:54 PM CDTSevere Thunderstorm WarningFGFRansom36 min
Jul 27, 4:20 PM CDTSevere Thunderstorm WarningFGFRichland35 min
Jul 27, 4:27 PM CDTTornado WarningFGFRansom, Richland33 min
Jul 27, 4:33 PM CDTSevere Thunderstorm WarningFGFCass32 min

Nearby

Tornado Warnings in North Dakota, 1999Every tornado warning in 1999Tornadoes 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; radar from the NEXRAD Level II archive.