Alert archive / Minnesota / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 259, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Aug 3, 2002, 8:18 PM CDT for Le Sueur County, Scott County, Minnesota. It was in force for 42 min. 2 reports came from inside the area while it was in force.
The area
The outline as issued, with what was reported inside it.
The facts
- Issued
- Aug 3, 2002, 8:18 PM CDT (01:18 UTC)
- Expired
- Aug 3, 2002, 9:00 PM CDT
- In force
- 42 min
- Issued by
- NWS Twin Cities, MN
- Area
- Counties, with a storm outline in the text
Counties Le Sueur County, MN, Scott County, MN
The radar
The Minneapolis radar (KMPX), 47 km from the middle of the area, began a volume at 01:19 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 |
|---|---|---|---|
| Aug 3, 8:32 PM CDT | Thunderstorm Wind 50 E | Cleveland, MN | Few trees knocked over. |
| Aug 3, 8:40 PM CDT | Thunderstorm Wind 62 M | New Prague, MN | Three roofs off houses. Numerous trees down. |
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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 3, 3:00 PM CDT | Tornado Watch | SPC | 6 hr |
| Aug 3, 6:45 PM CDT | Tornado Watch | SPC | 5 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 00:00Z, 1.3 hours before the alert went out and 46 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.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 777 m above ground
- 0-6 km bulk shear
- 39 kt
- 0-1 km storm-relative helicity
- -89 m²/s²
- 0-3 km storm-relative helicity
- 509 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.6
The text
As transmitted, in the capitals the NWS used until 2016.
355 WUUS53 KMPX 040118 SVRMSP MNC079-139-040200- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE TWIN CITIES/CHANHASSEN MN 817 PM CDT SAT AUG 3 2002 THE NATIONAL WEATHER SERVICE IN THE TWIN CITIES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SCOTT COUNTY IN EAST CENTRAL MINNESOTA LE SUEUR COUNTY IN SOUTH CENTRAL MINNESOTA * UNTIL 900 PM CDT * AT 817 PM CDT...RADAR INDICATED A LINE OF SEVERE THUNDERSTORMS FROM 12 MILES WEST OF BELLE PLAINE TO 8 MILES WEST OF ST PETER... MOVING EAST AT 40 MPH. * SOME LOCATIONS AFFECTED BY THIS STORM INCLUDE... CLEVELAND. HEIDELBERG. KILKENNY. LE CENTER. MONTGOMERY. NEW PRAGUE. A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER... SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. THIS IS A DANGEROUS STORM...STAY INDOORS AWAY FROM WINDOWS. SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. LAT...LON 4454 9386 4427 9393 4423 9354 4468 9357
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 3, 7:24 PM CDT | Severe Thunderstorm Warning | MPX | Le Sueur, Rice, Scott | 36 min |
| Aug 3, 7:26 PM CDT | Flash Flood Warning | MPX | Carver, Dakota, Scott | 4 hr |
| Aug 3, 7:49 PM CDT | Flash Flood Warning | MPX | Sibley | 3 hr |
| Aug 3, 7:53 PM CDT | Severe Thunderstorm Warning | MPX | Blue Earth, Brown, Nicollet, Sibley, Watonwan | 52 min |
| Aug 3, 8:50 PM CDT | Severe Thunderstorm Warning | MPX | Blue Earth, Rice, Steele, Waseca | 55 min |
| Aug 3, 9:05 PM CDT | Severe Thunderstorm Warning | MPX | Dakota | 40 min |
| Aug 3, 9:21 PM CDT | Severe Thunderstorm Warning | MPX | Goodhue | 39 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 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; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.