Alert archive / Minnesota / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 121, NWS Grand Forks, ND

July 14, 1998Hubbard County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 14, 1998, 3:07 AM CDT for Hubbard County, Minnesota. It was in force for 48 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
Jul 14, 1998, 3:07 AM CDT (08:07 UTC)
Expired
Jul 14, 1998, 3:55 AM CDT
In force
48 min
Issued by
NWS Grand Forks, ND
Area
Whole counties

County Hubbard County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 187 km from the middle of the area, began a volume at 08:09 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 14, 3:10 AM CDTHail 0.75Park Rapids, MN

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

International Fa, MN (KINL), launched 00:00Z, 8.1 hours before the alert went out and 202 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, International Fa, MN at 00:00Z on 1998-07-14Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 0 joules per kilogram.LCL10008507005003002001001 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, International Fa, MN at 00:00Z on 1998-07-14The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 39 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
0 J/kg
Mixed-layer CIN
No buoyant parcel
Mixed-layer LCL
2864 m above ground
0-6 km bulk shear
34 kt
0-1 km storm-relative helicity
39 m²/s²
0-3 km storm-relative helicity
112 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.

083 
WUUS1 KFAR 140808 RRA
SVRFAR
MNC057-140855-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
307 AM CDT TUE JUL 14 1998

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHERN HUBBARD COUNTY IN NORTH CENTRAL MINNESOTA

* UNTIL 355 AM CDT

* AT 305 AM CDT...RADAR INDICATED A SEVERE THUNDERSTORM NEAR PARK
  RAPIDS OR 40 MILES SOUTH OF BEMIDJI. MOVEMENT WAS TO THE EAST AT 35
  MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  BADOURA AT 335 AM CDT

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


BRAZZELL

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 13, 8:45 PM CDT, 6 hours 22 minutes earlier.

Area forecast discussion, Jul 13, 8:45 PM CDT, 6 hours 22 minutes before
FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
845 PM CDT MON JUL 13 1998

1ST PERIOD DISCUSSION...TEMPS SHUD BE MAIN FCST ISSUE TNGT. BELIV ANY
TSRA THAT HAVE FORMED OFF SUPERCELL IN CNRTRL SD BEING MAINLY DIURNALLY
DRIVEN ALONG OUTLFOW BNDRY AND WL PLAN ON THEM NOT REACHING CWFA THIS
EVE. IF IT LINGERS LONG ENUF...CUD BECOME MORE OF A MCS TYPE SYSTM
LATER...BUT BELIV THAT WUD SLIDE MORE E/SE W THCKNESS PATTN AND HOLD
JUST S OF CWA.

ADAP SHOWING GUD INSTABILITY GRAD LYING ACRSS SRN ND IN CONJUNCTION W
TIGHT GRADIENT OF SFC MXNG RATIOS. BEST MOIST CNVRGNCE SHUD ALSO HOLD
TO S OF CWA OVNGT IN VCNTY OF STATIONARY BNDRY AND WK SFC LO PRES NR
PIR. HOWEVER...WNDS ALRDY NR CALM IN RRV AND WUD XPCT SHIFT TO LGT S
AFTR MDNGT TO BEGIN ADVCTNG SUM OF THE HIER DEW PT AIR BACK INTO SRN
CWA SO WL BUMP UP SUM LOWS IN XTRM SE ND FOR TNGT. LOWS ON MN SIDE HAVE
GUD HANDLE ON THIS SO WL LEAVE AS IS.

NRN ZONES IN DRIER AIR ATTM BHND THIS AFTN/S FNT W TD/S IN MID 50S
RANGE SO XPCT LOWEST TEMPS THERE OVNGT WHICH FCST HAS COVERED. WL PLAN
ON CHANGING SUM SRN ZONES TO PCLDY TO ALLOW FOR CI BLOWOFF FROM ONGOING
CNVCTN AND ANY LATER CLDS FROM PSBL COMPLEX THAT CUD RIDE JUST TO THE
S.

SOROKA

The office that day

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

IssuedProductOfficeCountiesLasted
Jul 14, 5:32 AM CDTSevere Thunderstorm WarningFGFPennington, Polk33 min
Jul 14, 7:17 AM CDTSevere Thunderstorm WarningFGFMarshall33 min
Jul 14, 8:09 AM CDTSevere Thunderstorm WarningFGFClay, Norman31 min
Jul 14, 8:19 AM CDTSevere Thunderstorm WarningFGFRoseau31 min
Jul 14, 11:18 AM CDTSevere Thunderstorm WarningFGFBeltrami32 min
Jul 14, 11:21 AM CDTSevere Thunderstorm WarningFGFClearwater, Polk34 min
Jul 14, 12:58 PM CDTSevere Thunderstorm WarningFGFBeltrami, Hubbard32 min
Jul 14, 1:14 PM CDTSevere Thunderstorm WarningFGFWilkin31 min
Jul 14, 1:46 PM CDTSevere Thunderstorm WarningFGFOtter Tail, Wilkin34 min
Jul 14, 2:16 PM CDTSevere Thunderstorm WarningFGFOtter Tail34 min
Jul 14, 2:36 PM CDTTornado WarningFGFOtter Tail34 min
Jul 14, 3:07 PM CDTFlash Flood WarningFGFOtter Tail118 min
Jul 14, 3:10 PM CDTSevere Thunderstorm WarningFGFOtter Tail50 min
Jul 14, 4:01 PM CDTSevere Thunderstorm WarningFGFOtter Tail49 min
Jul 14, 4:53 PM CDTSevere Thunderstorm WarningFGFOtter Tail32 min
Jul 14, 5:02 PM CDTFlash Flood WarningFGFOtter Tail3 hr
Jul 14, 5:15 PM CDTSevere Thunderstorm WarningFGFBecker, Clay35 min
Jul 14, 5:26 PM CDTSevere Thunderstorm WarningFGFOtter Tail64 min
Jul 14, 5:30 PM CDTSevere Thunderstorm WarningFGFClearwater, Hubbard35 min
Jul 14, 5:43 PM CDTSevere Thunderstorm WarningFGFGrant32 min
Jul 14, 5:46 PM CDTSevere Thunderstorm WarningFGFBecker34 min
Jul 14, 6:16 PM CDTSevere Thunderstorm WarningFGFGrant34 min
Jul 14, 6:22 PM CDTSevere Thunderstorm WarningFGFWilkin33 min
Jul 14, 6:47 PM CDTSevere Thunderstorm WarningFGFGrant43 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1998Every severe thunderstorm warning in 1998

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.