Alert archive / Iowa / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 14, NWS La Crosse, WI
NWS La Crosse, WI issued this severe thunderstorm warning at May 12, 2000, 6:13 AM CDT for Allamakee County, Winneshiek County, Iowa. It was in force for 32 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
- May 12, 2000, 6:13 AM CDT (11:13 UTC)
- Expired
- May 12, 2000, 6:45 AM CDT
- In force
- 32 min
- Issued by
- NWS La Crosse, WI
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Allamakee County, IA, Winneshiek County, IA
The radar
The La Crosse radar (KARX), 62 km from the middle of the area, began a volume at 11:14 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 |
|---|---|---|---|
| May 12, 6:38 AM CDT | Hail 0.88 | Dorchester, IA | |
| May 12, 6:46 AM CDT | Hail 0.75 | Church, IA |
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
Davenport, (KDVN), launched 00:00Z, 11.2 hours before the alert went out and 215 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
- 2323 J/kg
- Mixed-layer CIN
- -39 J/kg
- Mixed-layer LCL
- 1261 m above ground
- 0-6 km bulk shear
- 47 kt
- 0-1 km storm-relative helicity
- 171 m²/s²
- 0-3 km storm-relative helicity
- 218 m²/s²
- Significant tornado parameter
- 1.8
- Supercell composite
- 13.9
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS53 KARX 121114 SVRLSE IAC005-191-121145- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE LA CROSSE WI 613 AM CDT FRI MAY 12 2000 THE NATIONAL WEATHER SERVICE IN LA CROSSE HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... NORTHERN ALLAMAKEE COUNTY IN NORTHEAST IOWA NORTHERN WINNESHIEK COUNTY IN NORTHEAST IOWA * UNTIL 645 AM CDT * AT 613 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM PRODUCING LARGE HAIL 3 MILES NORTHWEST OF DECORAH. THIS ACTIVITY WAS MOVING NORTHEAST AT 45 MPH. * THE SEVERE THUNDERSTORM WILL BE... NEAR LOCUST AND HESPER AT 620 AM CDT NEAR QUANDAHL AND HANOVER AT 625 AM CDT NEAR NEW ALBIN AT 645 AM CDT LARGE DESTRUCTIVE HAIL IS THE MAIN THREAT WITH THESE STORMS. FOR YOUR PROTECTION...SEEK SHELTER IN A STURDY BUILDING AND STAY AWAY FROM WINDOWS. NELSON LAT...LON 4349 9200 4317 9184 4318 9112 4350 9124
The office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| May 11, 7:00 PM CDT | Severe Thunderstorm Warning | ARX | Chickasaw | 30 min |
| May 11, 7:15 PM CDT | Severe Thunderstorm Warning | ARX | Fayette | 60 min |
| May 11, 7:58 PM CDT | Severe Thunderstorm Warning | ARX | Allamakee | 62 min |
| May 11, 8:12 PM CDT | Severe Thunderstorm Warning | ARX | Fayette | 78 min |
| May 11, 8:25 PM CDT | Tornado Warning | ARX | Clayton | 35 min |
| May 11, 8:50 PM CDT | Severe Thunderstorm Warning | ARX | Winneshiek | 40 min |
| May 12, 6:43 AM CDT | Severe Thunderstorm Warning | ARX | Allamakee | 62 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 2000Every 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.