Alert archive / North Dakota / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 143, NWS Grand Forks, ND

July 12, 2000Ransom County, Sargent County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 12, 2000, 7:26 PM CDT for Ransom County, Sargent County, North Dakota. It was in force for 44 min. 3 reports came from inside the area while it was in force.

The area

The outline the Iowa Environmental Mesonet reconstructed for it; the warning itself named whole counties, with what was reported inside it.

The facts

Issued
Jul 12, 2000, 7:26 PM CDT (00:26 UTC)
Expired
Jul 12, 2000, 8:10 PM CDT
In force
44 min
Issued by
NWS Grand Forks, ND
Area
Whole counties; the outline is the Mesonet’s reconstruction

Counties Ransom County, ND, Sargent County, ND

The radar

The Aberdeen radar (KABR), 105 km from the middle of the area, began a volume at 00:26 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 12, 7:50 PM CDTHail 0.75Gwinner, ND
Jul 12, 7:55 PM CDTHail 1.75Lisbon, ND
Jul 12, 7:55 PM CDTHail 0.88Lisbon, 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

Aberdeen, SD (KABR), launched 00:00Z, 0.4 hours before the alert went out and 163 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 00:00Z on 2000-07-13Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 1124 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 00:00Z on 2000-07-13The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 54 square meters per square second.1939587897Sfc1 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
1124 J/kg
Mixed-layer CIN
-59 J/kg
Mixed-layer LCL
1754 m above ground
0-6 km bulk shear
57 kt
0-1 km storm-relative helicity
54 m²/s²
0-3 km storm-relative helicity
288 m²/s²
Significant tornado parameter
0.4
Supercell composite
13.4

Open this sounding in Storm Lab

The text

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

505 
WUUS53 KFGF 130026
SVRFAR
NDC073-081-130110-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS
726 PM CDT WED JUL 12 2000

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN RANSOM COUNTY IN SOUTHEAST NORTH DAKOTA...
  NORTHERN SARGENT COUNTY IN SOUTHEAST NORTH DAKOTA...

* UNTIL 810 PM CDT

* AT 721 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 11 MILES NORTHWEST OF CRETE...OR ABOUT 45 MILES
  SOUTH OF VALLEY CITY...MOVEMENT WAS TO THE EAST AT 50 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  CRETE AT 730 PM CDT...
  ENGLEVALE AT 735 PM CDT...
  ELLIOTT AT 740 PM CDT...
  GWINNER AT 750 PM CDT...

REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES WITH LITTLE OR NO ADVANCE WARNING.

LAT...LON 4641 9823 4613 9819 4616 9729 4646 9733

NNNN

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 Grand Forks, ND wrote its last area forecast discussion before this severe thunderstorm warning went out at Jul 12, 2:25 PM CDT, 5 hours 1 minute earlier.

Area forecast discussion, Jul 12, 2:25 PM CDT, 5 hours 1 minute before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
225 PM CDT WED JUL 12 2000

UDPATED TO ATTACH EXTENDED DISCUSSION...

CLEAR SAILING FCST WISE INTO FRIDAY AS HIGH PRESSURE BRINGS MUCH
NEEDED BREAK FROM THE RAIN.

.CURRENT...
19Z MAP SHOWS SFC TROUGH ACROSS NE MN INTO WRN WI/ERN IA.  CLOUDS
HAVE CLEARING OUT OF ERN CWFA...AND SUBSIDENCE WITH RIDGE APPARENTLY
SQUASHING MUCH CU FORMATION.

ETA/MESO ETA LOOK GOOD AND FOLLOWED.  MOS GUIDANCE TEMPS TEMPERED BACK
SOME.

.SHORT RANGE...
WILL FOG DEVELOP TONIGHT?  DRIER AIR IS ADVECTING IN AT THE LOW
LEVELS THIS AFTN AS EVIDENCE BY DEW PTS FALLING TO 59 AT KDVL AND 62
AT KGFK.  HOWEVER...BIT HIGHER RESIDUAL MOISTURE REMAINS IN FAR ERN
AND SE CWFA...SE OF A BDE-FAR LINE.  MAIN CENTER OF THE HIGH WILL BE
TO SOUTH OVER THE CNTRL PLAINS...WITH LIGHT WESTERLY FLOW TONIGHT.
WEST WINDS NOT FAVORABLE FOR FOG FORMATION IN THIS AREA.  BUT WITH
RESIDUAL MOISTURE IN THE BDRY LAYER PATCHY FOG PSBL MAINLY MN CWFA.
WILL MENTION PATCHY FOG IN MN CWFA...AND LEAVE OUT OF ND CWFA DUE TO
A BIT DRIER AIRMASS.  SHOULD COOL TO DEW PTS LEVELS TONIGHT...WITH
NR 60 MOST LOCATIONS.

.LONGER RANGE...
HIGH BUILDS SOUTHEAST FROM SASK/ALTA THURSDAY WITH CENTER OVR CWFA
BY 00Z FRI.  85H TEMPS THU REMAIN SIMILAR TO WED...BUT 50H TEMPS
WARM A TAD AND STRONG SUBSIDENCE UNDERNEATH SFC HIGH.  THUS WILL
CONTINUE SUNNY WORDING WITH HIGHS SIMILAR ON THURSDAY. FWC/FAN LOOK
A TAD WARM.

CLEAR SKY THU NIGHT.  ETA/MESO ETA SHOWS GOOD CONTINUITY WITH RETURN
SE FLOW UP INTO MT THU NIGHT ALLOWING MCS TO FORM AND MOVE INTO WRN
ND BY 12Z FRI.  MCS WILL DISSIPATE AS IT MOVES SE TOWARD SCNTRL
ND/NCTRL SD FRIDAY MIDDAY...BUT EXPECT RESIDUAL CLDS TO MOVE INTO
ERN ND.  SO WILL GO PTLY SUNNY FRI AND KEEP NW MN MSTLY SUNNY.
ONCE AGAIN MIDDLE 80S LOOK GOOD MOST LOCATIONS.

.EXTENDED...
THICKNESS RIDGE REMAINS ANCHORED OVER WRN ND THRU 12Z SAT...FAVORING
FRI NGT MCS DEVELOPMENT JUST TO THE NW OF CWA AS AVN/CANADIAN
DEVELOP AN INITIAL VORT MAX THAT SHOULD TOP THE RIDGE AND SLIDE INTO
SRN CANADA. PRECIP COULD SNEAK INTO DVL-HCO-BDE LINE BY 12Z SAT BUT
CONFIDENCE NOT HIGH ENUF TO ADD GHOST PERIOD ATTM. MORE WIDESPREAD
TSRA ACTION EXPECTED BY LATER SAT AS MRF/ECMWF/CANADIAN AND NOGAPS
FAIRLY SIMILAR IN DEVELOPING SIG CDFNT PASSAGE BY 00Z SUNDAY WITH
PLUME OF STEEP LAPSE RATES AND H85 TD/S UP TO 17C AGAIN PROGGED INTO
SRN ND FOR POSSIBLE SEVERE. GOOD CAA PUSH BEHIND FRONT FROM SFC-H5 FAVORS
QUICK MOVEMENT TO SQUALL LINE (LESSENING THREAT FOR ANOTHER FLOODING
EVENT) WITH DRYING INTO ND CWA BY ERY SUN AND LINGERING -TSRA IN MN.
THEREAFTER...NRN EXTENT OF RIDGE IS FLATTENED EARLY NEXT WEEK WITH
PASSING HI PRES NORTH OF BORDER AND U/L CONFLUENT FLO SUPPRESSING
MAIN BOUNDARY SOUTH. MRF HINTS AT A FEW WEAK WAVES DAY 6-7 TIME
FRAMEe SINKING SE FROM TOP OF RE-BUILDING RIDGE...BUT WILL OPT OUT OF
PRECIP MENTION THIS FAR OUT WITH PROTECTIVE SFC HI PRES NEARBY AND
LOW LEVEL E/NE FLO.

.FGF...NONE.

RIDDLE

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 13, 12:11 AM CDTSevere Thunderstorm WarningFGFRichland29 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 2000Every severe thunderstorm warning in 2000

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.