Alert archive / Minnesota / Severe Thunderstorm Warnings in 2000

Severe Thunderstorm Warning 153, NWS Grand Forks, ND

July 25, 2000Mahnomen County, Minnesota

NWS Grand Forks, ND issued this severe thunderstorm warning at Jul 25, 2000, 12:40 PM CDT for Mahnomen County, Minnesota. It was in force for 30 min. 2 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 25, 2000, 12:40 PM CDT (17:40 UTC)
Expired: Jul 25, 2000, 1:10 PM CDT
In force: 30 min
Issued by: NWS Grand Forks, ND
Area: Whole counties; the outline is the Mesonet’s reconstruction

County Mahnomen County, MN

The radar

The Fargo/Grand Forks radar (KMVX), 137 km from the middle of the area, began a volume at 17:44 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

Time	Report	Where	Remark
Jul 25, 12:55 PM CDT	Hail 1	Naytahwaush, MN
Jul 25, 12:55 PM CDT	Hail 1	Zerkel, 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 12:00Z, 5.7 hours before the alert went out and 221 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: 795 J/kg
Mixed-layer CIN: -38 J/kg
Mixed-layer LCL: 852 m above ground
0-6 km bulk shear: 42 kt
0-1 km storm-relative helicity: 68 m²/s²
0-3 km storm-relative helicity: 79 m²/s²
Significant tornado parameter: 0.2
Supercell composite: 1.4

Open this sounding in Storm Lab

The text

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

000 
WUUS53 KFGF 251743
SVRFAR
MNC029-087-251810-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND-GRAND FORKS
1240 PM CDT TUE JUL 25 2000

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...
  SOUTHEASTERN MAHNOMEN COUNTY IN NORTHWEST MINNESOTA...

* UNTIL 110 PM CDT

* AT 1232 PM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM 4 MILES NORTHWEST OF NAYTAHWAUSH...OR ABOUT 33
  MILES NORTH OF DETROIT LAKES...MOVEMENT WAS TO THE NORTHEAST AT 30
  MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR...
  ROY LAKE AT 1245 PM CDT...
  
REMEMBER SEVERE THUNDERSTORMS CAN AND OCCASIONALLY DO PRODUCE
TORNADOES WITH LITTLE OR NO ADVANCE WARNING.

LAT...LON 4728 9579 4716 9561 4718 9522 4742 9530

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 25, 9:55 AM CDT, 2 hours 45 minutes earlier.

Area forecast discussion, Jul 25, 9:55 AM CDT, 2 hours 45 minutes before

FORECAST DISCUSSION FOR EASTERN NORTH DAKOTA AND NORTHWEST MINNESOTA
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
955 AM CDT TUE JUL 25 2000

FORECAST PROBLEM FOR TODAY IS PCPN. LATEST VIS SATELLITE IMAGERY
SHOWS AC ASSOCIATED WITH SHRA AND TSRA PRIMARILY IN THE N AND W
PARTS OF CWFA. KMVX HAS SHRA AND ISOLD TSRA OVER NE ND AND NW MN.
LATEST MSAS SFC PRESSURE ANALYSIS HAS LOW PRESSURE TROF EXTENDING
THROUGH CWFA ALONG A BDE-CKN LINE...THEN SW BETWEEN JMS AND FAR.
WHEN COMPARING CURRENT MSAS SFC PLOT TO MODELS...ETA MATCHES BEST
WITH AVN ALSO PRETTY CLOSE. SFC TROF AND UPPER LEVEL TROF CONTINUE
TO SLIDE SE THIS AFTERNOON...KEEPING UVV OVER THE CWFA...AND THE
POTENTIAL FOR SHRA AND TSRA. THEREFORE...CURRENT FORECAST RIGHT
ON TRACK...WITH ONLY MINOR CHANGES NEEDED.

.FGF...NONE.

NG

In the hours before

Local storm report, Jul 25, 6:43 AM CDT, 5 hours 57 minutes before

PRELIMINARY LOCAL STORM REPORT
NATIONAL WEATHER SERVICE EASTERN NORTH DAKOTA/GRAND FORKS
643 AM CDT TUE JUL 25 2000

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

0710 PM    BRAMPTON                  ND   1 INCH HAIL
07/24/00   SARGENT

N

Special weather statement, Jul 25, 11:53 AM CDT, 47 minutes before

MNZ017-024-028-030>032-040-251850-

HAZARDOUS WEATHER OUTLOOK
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS ND
1153 AM CDT TUE JUL 25 2000

...SEVERE THUNDERSTORMS POSSIBLE ACROSS PORTIONS OF WEST CENTRAL
MINNESOTA THIS AFTERNOON...

SYNOPSIS...MOIST AND UNSTABLE AIR AHEAD OF A TROUGH OF LOW PRESSURE
COULD TRIGGER SCATTERED SEVERE THUNDERSTORMS THIS AFTERNOON AND
EVENING.

AREA OF CONCERN...A SLIGHT RISK OF SEVERE THUNDERSTORMS ARYE POSSIBLE
THIS AFTERNOON ALONG AND EAST OF A NORCROSS TO FERGUS FALLS TO
DETROIT LAKES TO WASKISH LINE.

TIME...START TIME AFTER 1 PM UNTIL 8 PM.

TYPE OF HAZARD...LARGE HAIL AND STRONG WIND.

DJK

NNNN

The office that day

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

Issued	Product	Office	Counties	Lasted
Jul 24, 11:43 PM CDT	Severe Thunderstorm Warning	FGF	Wilkin	32 min
Jul 25, 12:11 AM CDT	Severe Thunderstorm Warning	FGF	Otter Tail	29 min
Jul 25, 12:35 PM CDT	Severe Thunderstorm Warning	FGF	Beltrami, Clearwater	30 min
Jul 25, 1:17 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Clay	28 min
Jul 25, 1:48 PM CDT	Severe Thunderstorm Warning	FGF	Hubbard	32 min
Jul 25, 2:37 PM CDT	Severe Thunderstorm Warning	FGF	Becker, Otter Tail	28 min
Jul 25, 3:04 PM CDT	Severe Thunderstorm Warning	FGF	Otter Tail	31 min
Jul 25, 3:42 PM CDT	Severe Thunderstorm Warning	FGF	Otter Tail	28 min

Nearby

Severe Thunderstorm Warnings in Minnesota, 2000 Every 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.