Alert archive / North Dakota / Severe Thunderstorm Warnings in 2002

Severe Thunderstorm Warning 348, NWS Grand Forks, ND

September 18, 2002Barnes County, North Dakota

NWS Grand Forks, ND issued this severe thunderstorm warning at Sep 18, 2002, 4:20 PM CDT for Barnes County, North Dakota. It was in force for 25 min. No storm report in the archive falls inside the area while it was in force.

The area

The outline as issued.

The facts

Issued
Sep 18, 2002, 4:20 PM CDT (21:20 UTC)
Expired
Sep 18, 2002, 4:45 PM CDT
In force
25 min
Issued by
NWS Grand Forks, ND
Area
Counties, with a storm outline in the text

County Barnes County, ND

The radar

The Fargo/Grand Forks radar (KMVX), 58 km from the middle of the area, began a volume at 21:23 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 nearest sounding before it

Bismarck Municip, ND (KBIS), launched 12:00Z, 9.3 hours before the alert went out and 218 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, Bismarck Municip, ND at 12:00Z on 2002-09-18Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 852 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, Bismarck Municip, ND at 12:00Z on 2002-09-18The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 20 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
852 J/kg
Mixed-layer CIN
-265 J/kg
Mixed-layer LCL
1018 m above ground
0-6 km bulk shear
20 kt
0-1 km storm-relative helicity
20 m²/s²
0-3 km storm-relative helicity
42 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.

448 
WUUS53 KFGF 182120
SVRFAR
NDC003-182145-

BULLETIN - EAS ACTIVATION REQUESTED
SEVERE THUNDERSTORM WARNING
NATIONAL WEATHER SERVICE EASTERN ND/GRAND FORKS
420 PM CDT WED SEP 18 2002

THE NATIONAL WEATHER SERVICE IN GRAND FORKS HAS ISSUED A

* SEVERE THUNDERSTORM WARNING FOR...

  NORTHEASTERN BARNES COUNTY IN SOUTHEAST NORTH DAKOTA.

* UNTIL 445 PM CDT.

* AT 418 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A
  SEVERE THUNDERSTORM OVER PILLSBURY...OR ABOUT 22 MILES NORTHEAST OF
  VALLEY CITY...MOVEMENT WAS TO THE NORTH AT 15 MPH.

* THE SEVERE THUNDERSTORM WILL BE NEAR

  PILLSBURY AT 450 PM CDT.

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

LAT...LON 4714 9796 4712 9774 4724 9774 4723 9804


55

NNNN

The office that day

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

IssuedProductOfficeCountiesLasted
Sep 18, 2:21 PM CDTSevere Thunderstorm WarningFGFCass39 min
Sep 18, 3:00 PM CDTSevere Thunderstorm WarningFGFCass45 min
Sep 18, 3:35 PM CDTFlash Flood WarningFGFCass6 hr
Sep 18, 3:46 PM CDTSevere Thunderstorm WarningFGFCass, Ransom, Steele44 min
Sep 18, 4:28 PM CDTSevere Thunderstorm WarningFGFRichland32 min
Sep 18, 4:32 PM CDTSevere Thunderstorm WarningFGFCass43 min
Sep 18, 5:16 PM CDTSevere Thunderstorm WarningFGFCass44 min
Sep 18, 5:37 PM CDTSevere Thunderstorm WarningFGFRichland38 min
Sep 18, 6:19 PM CDTFlash Flood WarningFGFPembina6 hr

Nearby

Severe Thunderstorm Warnings in North Dakota, 2002Every severe thunderstorm warning in 2002

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.