Alert archive / Minnesota / Severe Thunderstorm Warnings in 1998

Severe Thunderstorm Warning 43, NWS Grand Forks, ND

May 27, 1998Mahnomen County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at May 27, 1998, 11:36 PM CDT for Mahnomen County, Minnesota. It was in force for 34 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: May 27, 1998, 11:36 PM CDT (04:36 UTC)
Expired: May 28, 1998, 12:10 AM CDT
In force: 34 min
Issued by: NWS Grand Forks, ND
Area: Whole counties

County Mahnomen County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 116 km from the middle of the area, began a volume at 04:36 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.

Issued	Product	Office	Lasted
May 27, 8:15 PM CDT	Severe Thunderstorm Watch	SPC	6 hr

The nearest sounding before it

International Fa, MN (KINL), launched 00:00Z, 4.6 hours before the alert went out and 233 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-p

Temperature in red, dew point in green, the mixed-layer parcel dashed.

Hodograph

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: 11 J/kg
Mixed-layer CIN: -4 J/kg
Mixed-layer LCL: 1951 m above ground
0-6 km bulk shear: 27 kt
0-1 km storm-relative helicity: 18 m²/s²
0-3 km storm-relative helicity: 37 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 280436 RRA
SVRFAR
MNC087-280510-

BULLETIN - IMMEDIATE BROADCAST REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1136 PM CDT WED MAY 27 1998

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  MAHNOMEN COUNTY IN WEST CENTRAL MINNESOTA

* UNTIL 1210 AM CDT

* AT 1135 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM NEAR
MAHNOMEN .
  ..OR 35 MILES NORTH OF DETROIT LAKES. THE STORM WAS MOVING EAST AT
  30 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  MAHNOMEN

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

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 May 27, 9:00 PM CDT, 2 hours 36 minutes earlier.

Area forecast discussion, May 27, 9:00 PM CDT, 2 hours 36 minutes before

AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
900 PM CDT WED MAY 27 1998

1ST PERIOD DISCUSSION...SVR WX ACRSS CWA ATTM SO WL BE BRF. NUMEROUS
RPRTS OF SVR HAIL AND FUNNEL CLOUDS ALONG W STRGT LINE WINDS. HEAVY
RAIN ALSO PBLM IN SLO-MOVNG STMS JUST N OF GFK. IR LOOP INDICATES TOPS
STILL COOLING XTRM NE ND INTO NW MN. OTHER AREA OF TSTMS JUST NOW
ENTERING S AND SW CWA AND SHUD PRGRSS THRU MUCH OF SRN/CNTRL ND CWA AND
INTO WCNTRL MN.

LUKS LIKE SVR TO CONT THRU AT LEAST MDNGT AS ADAP SHOWS STRNG MOIST
CONVRGNCE AND INSTABLITY STILL PRESENT. LOW PRES A BIT FRTHR S THAN
EARLIER PROGGED AND W BEST PRESS FALLS JUST W OF FAR...LUKS LIKE SVR
THREAT WILL ENCOMPASS MUCH IF NOT ALL MN SIDE CWA THRU MNDT.

SVR TSTM WATCH TIL 2 AM FOR MUCH OF CWA. ZONES ALRDY UPDATED W WATCH
ISSUANCE.

SOROKA

In the hours before

Local storm report, May 27, 10:30 PM CDT, 1 hour 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA/GRAND FORKS
1030 PM CDT WED MAY 27 1998

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0615 PM    2S ALSEN                  ND    0.75 INCH HAIL
05/27/98   CAVALIER

0710 PM    PARK RIVER                ND    0.75 INCH HAIL
05/27/98   WALSH

0740 PM    GRAFTON                   ND    1.25 INCH HAIL
05/27/98   WALSH

0750 PM    PARK RIVER                ND    1.25 INCH HAIL
05/27/98   WALSH

0812 PM    GRAFTON                   ND    1.00 INCH HAIL
05/27/98   WALSH

0825 PM    4SW STEPHEN               MN    0.75 INCH HAIL
05/27/98   MARSHALL

0855 PM    4W ARGYLE                 MN    0.75 INCH HAIL
05/27/98   MARSHALL

0934 PM    SANBORN                   ND    0.75 INCH HAIL
05/27/98   BARNES

 BELLES

Local storm report, May 27, 10:30 PM CDT, 1 hour 6 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA/GRAND FORKS
1030 PM CDT WED MAY 27 1998

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

0615 PM    2S ALSEN                  ND    0.75 INCH HAIL
05/27/98   CAVALIER

0710 PM    PARK RIVER                ND    0.75 INCH HAIL
05/27/98   WALSH

0740 PM    GRAFTON                   ND    1.25 INCH HAIL
05/27/98   WALSH

0750 PM    PARK RIVER                ND    1.25 INCH HAIL
05/27/98   WALSH

0812 PM    GRAFTON                   ND    1.00 INCH HAIL
05/27/98   WALSH

0825 PM    4SW STEPHEN               MN    0.75 INCH HAIL
05/27/98   MARSHALL

0855 PM    4W ARGYLE                 MN    0.75 INCH HAIL
05/27/98   MARSHALL

0934 PM    SANBORN                   ND    0.75 INCH HAIL
05/27/98   BARNES

 BELLES

Local storm report, May 27, 11:15 PM CDT, 21 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA/GRAND FORKS
1115 PM CDT WED MAY 27 1998

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1040 PM    5N FORT RANSOM            ND   0.75 INCH HAIL
05/27/98   RANSOM

Local storm report, May 27, 11:15 PM CDT, 21 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA/GRAND FORKS
1115 PM CDT WED MAY 27 1998

TIME(CDT)  .....CITY LOCATION..... STATE  ...EVENT/REMARKS...
           ....COUNTY LOCATION....

1040 PM    5N FORT RANSOM            ND   0.75 INCH HAIL
05/27/98   RANSOM

The office that day

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

Issued	Product	Office	Counties	Lasted
May 27, 8:08 PM CDT	Severe Thunderstorm Warning	FGF	Marshall	32 min
May 27, 8:39 PM CDT	Severe Thunderstorm Warning	FGF	Marshall	46 min
May 27, 11:03 PM CDT	Severe Thunderstorm Warning	FGF	Norman	37 min
May 28, 3:27 PM CDT	Severe Thunderstorm Warning	FGF	Marshall	48 min
May 28, 3:59 PM CDT	Severe Thunderstorm Warning	FGF	Pennington	31 min
May 28, 4:33 PM CDT	Severe Thunderstorm Warning	FGF	Marshall	32 min
May 28, 5:16 PM CDT	Severe Thunderstorm Warning	FGF	Kittson	34 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 1998 Every 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.