Alert archive / Minnesota / Severe Thunderstorm Warnings in 1997
Severe Thunderstorm Warning 127, NWS Twin Cities, MN
NWS Twin Cities, MN issued this severe thunderstorm warning at Jul 13, 1997, 8:17 PM CDT for Anoka County, Ramsey County, Washington County, Minnesota. It was in force for 58 min. 3 reports 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 13, 1997, 8:17 PM CDT (01:17 UTC)
- Expired
- Jul 13, 1997, 9:15 PM CDT
- In force
- 58 min
- Issued by
- NWS Twin Cities, MN
- Area
- Whole counties
Counties Anoka County, MN, Ramsey County, MN, Washington County, MN
The radar
The Minneapolis radar (KMPX), 48 km from the middle of the area, began a volume at 01:21 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 13, 8:20 PM CDT | Thunderstorm Wind 55 | Columbia Heights, MN | Trees and power lines blown down. Localized street flooding. Similar damages in neighboring Fridley. |
| Jul 13, 8:40 PM CDT | Thunderstorm Wind 60 | St Francis, MN | Large trees blown down. Estimated windspeed. |
| Jul 13, 8:51 PM CDT | Thunderstorm Wind 52 | Woodbury, 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Jul 13, 7:30 PM CDT | Severe Thunderstorm Watch | SPC | 5 hr |
The nearest sounding before it
International Fa, MN (KINL), launched 00:00Z, 1.3 hours before the alert went out and 385 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
- 832 J/kg
- Mixed-layer CIN
- -13 J/kg
- Mixed-layer LCL
- 1253 m above ground
- 0-6 km bulk shear
- 23 kt
- 0-1 km storm-relative helicity
- -8 m²/s²
- 0-3 km storm-relative helicity
- 0 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.2
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
The office that day
Everything else NWS Twin Cities, MN issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 13, 7:38 PM CDT | Severe Thunderstorm Warning | MPX | Scott | 52 min |
| Jul 13, 7:46 PM CDT | Tornado Warning | MPX | Scott, Sibley | 29 min |
| Jul 13, 7:48 PM CDT | Severe Thunderstorm Warning | MPX | Dakota, Hennepin | 42 min |
| Jul 13, 7:48 PM CDT | Severe Thunderstorm Warning | MPX | Carver | 42 min |
| Jul 13, 8:21 PM CDT | Severe Thunderstorm Warning | MPX | Rice, Steele, Waseca | 59 min |
| Jul 13, 8:21 PM CDT | Severe Thunderstorm Warning | MPX | Freeborn | 59 min |
| Jul 13, 8:31 PM CDT | Severe Thunderstorm Warning | MPX | Dakota, Hennepin | 44 min |
| Jul 13, 9:11 PM CDT | Severe Thunderstorm Warning | MPX | Goodhue | 49 min |
Nearby
Severe Thunderstorm Warnings in Minnesota, 1997Every severe thunderstorm warning in 1997
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.