Alert archive / North Dakota / Severe Thunderstorm Warnings in 2001

Severe Thunderstorm Warning 175, NWS Grand Forks, ND

July 19, 2001Cass County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 19, 2001, 6:02 AM CDT for Cass County, North Dakota. It was in force for 28 min. No storm report in the archive falls inside the area while it was in force.

The area

The counties it named.

The facts

Issued
Jul 19, 2001, 6:02 AM CDT (11:02 UTC)
Expired
Jul 19, 2001, 6:30 AM CDT
In force
28 min
Issued by
NWS Grand Forks, ND
Area
Whole counties

County Cass County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 66 km from the middle of the area, began a volume at 11:05 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.

The watch it was issued in

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

IssuedProductOfficeLasted
Jul 19, 3:00 AM CDTSevere Thunderstorm WatchSPC5 hr

The nearest sounding before it

Aberdeen, SD (KABR), launched 00:00Z, 11.0 hours before the alert went out and 243 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 2001-07-19Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 4034 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 2001-07-19The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity -14 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
4034 J/kg
Mixed-layer CIN
-17 J/kg
Mixed-layer LCL
1645 m above ground
0-6 km bulk shear
35 kt
0-1 km storm-relative helicity
-14 m²/s²
0-3 km storm-relative helicity
40 m²/s²
Significant tornado parameter
0.1
Supercell composite
1.5

Open this sounding in Storm Lab

The text

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

296 
WUUS53 KFGF 191102
SVRFAR
NDC017-191130-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS
602 AM CDT THU JUL 19 2001

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  EAST CENTRAL CASS COUNTY IN SOUTHEAST NORTH DAKOTA.
  INCLUDING THE CITY OF FARGO...

* UNTIL 630 AM CDT.

* AT 600 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 4 MILES SOUTHEAST OF MAPLETON...OR ABOUT 8
  MILES WEST OF FARGO...MOVEMENT WAS TO THE EAST AT 30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...

  HORACE AT 605 AM CDT...
  WEST FARGO AT 610 AM CDT AND
  OXBOW AT 615 AM CDT.

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

A SEVERE THUNDERSTORM WATCH REMAINS IN EFFECT UNTIL 800 AM CDT
THURSDAY MORNING FOR NORTHWESTERN MINNESOTA AND SOUTHEAST NORTH
DAKOTA.


$$
23

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 19, 3:25 AM CDT, 2 hours 37 minutes earlier.

Area forecast discussion, Jul 19, 3:25 AM CDT, 2 hours 37 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
325 AM CDT THU JUL 19 2001

FORECAST CONCERN CONTINUES TO BE CONVECTION

LITTLE OVERALL CHANGE IN PATTERN EXPECTED ACROSS FORECAST AREA.
ONGOING CONVECTION AHEAD OF SW/NE BOUNDARY THROUGH EASTERN NORTH
DAKOTA WILL CONTINUE TO BE MONITORED FOR AM MENTION. IN ADDITION
CONVECTIVE CLUSTER ALONG CENTRAL ND/SD BORDER WILL ALSO BE A CONCERN.

FOR TODAY WK SFC HIGH TO SHIFT OVER FORECAST AREA HOWEVER WILL
PROVIDE LITTLE PROTECTION FROM CONVECTIVE DEVELOPENT. CURRENT
BOUNDARY TO MOVE LITTLE BEING ORIENTED PARALLEL TO FLOW AND
ADDITIONAL BOUNDARIES AS A RESULT OF CURRENT CONVECTION TO LIKELY BE
FOCUS FOR ADDITIONAL CONVECTIVE DEVELOPMENT AND S/W EVIDENT ON WV
OVR IDAHO LIFTS NORTHEAST LATE IN DAY. ALSO WITH FAVORABLE LOW LEVEL
CONVERGENCE OVR NW SD AND ENTRANCE REGION OF UPPER JET COULD SEE
ROUND OF LATE NIGHT TSRA ORIGINATING FROM THIS AREA. WILL NOT GET
INTO DETAILS HOWEVER AIRMASS CONTINUES TO BE VERY MOIST AND UNSTABLE
FAVORING DEEP CONVECTION. ATTM FAVOR SOUTHERN HALF OF FA FOR
FAVORABLE LOCATION OF STRONGEST CONVECTION BASED ON STRONGEST
BOUNDARIES AND HIGH THETA-E AND THIS AREA MAY AGAIN SEE NEED FOR
FLASH FLOOD WATCH. AT THIS TIME WILL HOLD OFF WITH UNCERTAINTY ON
LATE NIGHT MCS. TEMPS STATUS-QUO WITH LITTLE CHANGE IN AIRMASS.

WILL LIKELY CONFINE PCPN CHANCES FR'IDAY TO AM HOURS AS HIGH BUILDS
IN DURING DAY ALONG WITH THETA-E RIDGE SHIFTING SOUTH AND LACK OF
ANY SIG BOUNDARIES.

.FGF...NONE.

VOELKER

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 18, 7:00 PM CDTTornado WarningFGFPembina45 min
Jul 18, 7:08 PM CDTFlash Flood WarningFGFPembina3 hr
Jul 18, 7:09 PM CDTSevere Thunderstorm WarningFGFGriggs51 min
Jul 18, 7:09 PM CDTTornado WarningFGFNelson51 min
Jul 18, 7:13 PM CDTTornado WarningFGFWalsh47 min
Jul 18, 7:15 PM CDTTornado WarningFGFGriggs, Steele45 min
Jul 18, 7:15 PM CDTTornado WarningFGFGrand Forks45 min
Jul 18, 7:17 PM CDTFlash Flood WarningFGFGrand Forks, Nelson3 hr
Jul 18, 7:42 PM CDTSevere Thunderstorm WarningFGFPembina48 min
Jul 18, 7:55 PM CDTSevere Thunderstorm WarningFGFWalsh50 min
Jul 18, 8:00 PM CDTTornado WarningFGFGriggs, Steele45 min
Jul 18, 8:46 PM CDTSevere Thunderstorm WarningFGFBarnes59 min
Jul 18, 10:47 PM CDTSevere Thunderstorm WarningFGFGrand Forks43 min
Jul 18, 11:28 PM CDTSevere Thunderstorm WarningFGFGrand Forks47 min
Jul 18, 11:47 PM CDTTornado WarningFGFGrand Forks28 min
Jul 19, 12:04 AM CDTSevere Thunderstorm WarningFGFTraill41 min
Jul 19, 12:14 AM CDTTornado WarningFGFGrand Forks31 min
Jul 19, 12:27 AM CDTFlash Flood WarningFGFGrand Forks, Traill2 hr
Jul 19, 12:27 AM CDTTornado WarningFGFTraill33 min
Jul 19, 1:59 AM CDTSevere Thunderstorm WarningFGFWalsh46 min
Jul 19, 5:07 AM CDTSevere Thunderstorm WarningFGFRansom23 min
Jul 19, 5:16 AM CDTSevere Thunderstorm WarningFGFRichland44 min

Nearby

Severe Thunderstorm Warnings in North Dakota, 2001Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.