Alert archive / Iowa / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 9, NWS La Crosse, WI
NWS La Crosse, WI issued this severe thunderstorm warning at Apr 11, 2001, 4:34 PM CDT for Floyd County, Mitchell County, Iowa. It was in force for 41 min. 1 report 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
- Apr 11, 2001, 4:34 PM CDT (21:34 UTC)
- Expired
- Apr 11, 2001, 5:15 PM CDT
- In force
- 41 min
- Issued by
- NWS La Crosse, WI
- Area
- Whole counties
Counties Floyd County, IA, Mitchell County, IA
The radar
The La Crosse radar (KARX), 146 km from the middle of the area, began a volume at 21:36 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 |
|---|---|---|---|
| Apr 11, 5:24 PM CDT | Hail 0.75 | St Ansgar, 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Apr 11, 4:00 PM CDT | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 9.6 hours before the alert went out and 194 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
- 5 J/kg
- Mixed-layer CIN
- 0 J/kg
- Mixed-layer LCL
- 454 m above ground
- 0-6 km bulk shear
- 40 kt
- 0-1 km storm-relative helicity
- 98 m²/s²
- 0-3 km storm-relative helicity
- 130 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 WUUS53 KARX 112135 RRA SVRLSE IAC067-131-112215- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE LA CROSSE WI 434 PM CDT WED APR 11 2001 THE NATIONAL WEATHER SERVICE IN LA CROSSE .A CATN2 010411 DH2100/XRIRG 75 .A CATN2 010411 DH2100/PCIRG 3.51 .A CATN2 010411 DH2100/MTIRG 36 .A CLBC1 010411 DH2144/TAIRG 33 .A CLBC1 010411 DH2144/UDIRG 346 .A CLBC1 010411 DH2144/USIRG 6 .A CLBC1 010411 DH2144/UPIRG 18 .A CLBC1 010411 DH2144/URIRG 324 .A CLBC1 010411 DH2144/XRIRG 81 .A CLBC1 010411 DH2144/PCIRG 9.39 .A CLBC1 010411 DH2144/MTIRG 43 .A BZRC1 010411 DH2145/TAIRG 47 .A BZRC1 010411 DH2145/UDIRG 105 .A BZRC1 010411 DH2145/USIRG 6 .A BZRC1 010411 DH2145/UPIRG 20 .A BZRC1 010411 DH2145/URIRG 308 .A BZRC1 010411 DH2145/XRIRG 46 .A BZRC1 010411 DH2145/PCIRG 5.07 .A BZRC1 010411 DH2145/MTIRG 67 .A OKNC1 010411 DH2145/TAIRG 52 .A OKNC1 010411 DH2145/UDIRG 307 .A OKNC1 010411 DH2145/USIRG 3 .A OKNC1 010411 DH2145/UPIRG 12 .A OKNC1 010411 DH2145/URIRG 316 .A OKNC1 010411 DH2145/XRIRG 35 .A OKNC1 010411 DH2145/PCIRG 8.94 .A OKNC1 010411 DH2145/MTIRG 62 .A WEEC1 010411 DH2145/TAIRG 46 .A WEEC1 010411 DH2145/UDIRG 12 .A WEEC1 010411 DH2145/USIRG 9 .A WEEC1 010411 DH2145/UPIRG 21 .A WEEC1 010411 DH2145/URIRG 344 .A WEEC1 010411 DH2145/PAIRG 26.85 .A WEEC1 010411 DH2145/XRIRG 44 .A WEEC1 010411 DH2145/PCIRG 7.42 .A WEEC1 010411 DH2145/MTIRG 54 .A VABC1 010411 DH2145/TAIRG 35 .A VABC1 010411 DH2145/UDIRG 290 .A VABC1 010411 DH2145/USIRG 15 .A VABC1 010411 DH2145/UPIRG 27 .A VABC1 010411 DH2145/URIRG 283 .A VABC1 010411 DH2145/XRIRG 63 .A VABC1 010411 DH2145/PCIRG 17.61 .A VABC1 010411 DH2145/MTIRG 39 .A CWCC1 010411 DH2145/HGIRG 3.30 .A CLNC1 010411 DH2146/TAIRG 51 .A CLNC1 010411 DH2146/UDIRG 42 .A CLNC1 010411 DH2146/USIRG 6 .A CLNC1 010411 DH2146/UPIRG 19 .A CLNC1 010411 DH2146/URIRG 11 .A CLNC1 010411 DH2146/XRIRG 29 .A CLNC1 010411 DH2146/PCIRG 12.45 .A CLNC1 010411 DH2146/MTIRG 64 .A RNDC1 010411 DH2146/TAIRG 40 .A RNDC1 010411 DH2146/UDIRG 282 .A RNDC1 010411 DH2146/USIRG 10 .A RNDC1 010411 DH2146/UPIRG 29 .A RNDC1 010411 DH2146/URIRG 17 .A RNDC1 010411 DH2146/PAIRG 30.34 .A RNDC1 010411 DH2146/XRIRG 47 .A RNDC1 010411 DH2146/PCIRG 9.43 .A RNDC1 010411 DH2146/MTIRG 432 .A FLFO3 010411 DH2146/TAIRG 34 .A FLFO3 010411 DH2146/UDIRG 345 .A FLFO3 010411 DH2146/USIRG 21 .A FLFO3 010411 DH2146/UPIRG 31 .A FLFO3 010411 DH2146/URIRG 350 .A FLFO3 010411 DH2146/XRIRG 68 .A FLFO3 010411 DH2146/PCIRG 5.12 .A FLFO3 010411 DH2146/MTIRG 40 .A SWBC1 010411 DH2146/TAIRG 52 .A SWBC1 010411 DH2146/UDIRG 118 .A SWBC1 010411 DH2146/USIRG 1 .A SWBC1 010411 DH2146/UPIRG 18 .A SWBC1 010411 DH2146/URIRG 233 .A SWBC1 010411 DH2146/XRIRG 45 .A SWBC1 010411 DH2146/PCIRG 40.60 .A SWBC1 010411 DH2146/MTIRG 60 .A ATSC1 010411 DH2146/TAIRG 35 .A ATSC1 010411 DH2146/UDIRG 341 .A ATSC1 010411 DH2146/USIRG 0 .A ATSC1 010411 DH2146/UPIRG 0 .A ATSC1 010411 DH2146/URIRG 341 .A ATSC1 010411 DH2146/XRIRG 69 .A ATSC1 010411 DH2146/PCIRG 5.62 .A ATSC1 010411 DH2146/MTIRG 51 .A HYFC1 010411 DH2147/TAIRG 44 .A HYFC1 010411 DH2147/UDIRG 348 .A HYFC1 010411 DH2147/USIRG 4 .A HYFC1 010411 DH2147/UPIRG 14 .A HYFC1 010411 DH2147/URIRG 341 .A HYFC1 010411 DH2147/XRIRG 49 .A HYFC1 010411 DH2147/PCIRG 21.74 .A HYFC1 010411 DH2147/MTIRG 52 .A GRSC1 010411 DH2147/TAIRG 34 .A GRSC1 010411 DH2147/UDIRG 288 .A GRSC1 010411 DH2147/USIRG 7 .A GRSC1 010411 DH2147/UPIRG 22 .A GRSC1 010411 DH2147/URIRG 248 .A GRSC1 010411 DH2147/XRIRG 52 .A GRSC1 010411 DH2147/PCIRG 7.91 .A GRSC1 010411 DH2147/MTIRG 35 .A ARFO3 010411 DH2147/TAIRG 36 .A ARFO3 010411 DH2147/UDIRG 317 .A ARFO3 010411 DH2147/USIRG 15 .A ARFO3 010411 DH2147/UPIRG 29 .A ARFO3 010411 DH2147/URIRG 309 .A ARFO3 010411 DH2147/XRIRG 71 .A ARFO3 010411 DH2147/PCIRG 2.30 .A ARFO3 010411 DH2147/MTIRG 48 .A BGBC1 010411 DH2147/TAIRG 60 .A BGBC1 010411 DH2147/UDIRG 263 .A BGBC1 010411 DH2147/USIRG 8 .A BGBC1 010411 DH2147/UPIRG 22 .A BGBC1 010411 DH2147/URIRG 328 .A BGBC1 010411 DH2147/XRIRG 49 .A BGBC1 010411 DH2147/PCIRG 17.36 .A BGBC1 010411 DH2147/MTIRG 74 .A WTFO3 010411 DH2147/TAIRG 24 .A WTFO3 010411 DH2147/UDIRG 330 .A WTFO3 010411 DH2147/USIRG 10 .A WTFO3 010411 DH2147/UPIRG 15 .A WTFO3 010411 DH2147/URIRG 326 .A WTFO3 010411 DH2147/XRIRG 92 .A WTFO3 010411 DH2147/PCIRG 4.58 .A WTFO3 010411 DH2147/MTIRG 27 .A ALDC1 010411 DH2148/TAIRG 60 .A ALDC1 010411 DH2148/UDIRG 275 .A ALDC1 010411 DH2148/USIRG 3 .A ALDC1 010411 DH2148/UPIRG 12 .A ALDC1 010411 DH2148/URIRG 214 .A ALDC1 010411 DH2148/XRIRG 59 .A ALDC1 010411 DH2148/PCIRG 25.64 .A ALDC1 010411 DH2148/MTIRG 74 .A FOXN2 010411 DH2148/TAIRG 28 .A FOXN2 010411 DH2148/UDIRG 339 .A FOXN2 010411 DH2148/USIRG 18 .A FOXN2 010411 DH2148/UPIRG 31 .A FOXN2 010411 DH2148/URIRG 311 .A FOXN2 010411 DH2148/XRIRG 64 .A FOXN2 010411 DH2148/PCIRG .55 .A FOXN2 010411 DH2148/MTIRG 33 .A MPCC1 010411 DH2148/TAIRG 55 .A MPCC1 010411 DH2148/UDIRG 311 .A MPCC1 010411 DH2148/USIRG 8 .A MPCC1 010411 DH2148/UPIRG 20 .A MPCC1 010411 DH2148/URIRG 313 .A MPCC1 010411 DH2148/XRIRG 75 .A MPCC1 010411 DH2148/PCIRG 36.63 .A MPCC1 010411 DH2148/MTIRG 73 .A SMSC1 010411 DH2100/TAIRG 59 .A SMSC1 010411 DH2100/UDIRG 225 .A SMSC1 010411 DH2100/USIRG 4 .A SMSC1 010411 DH2100/PAIRG 5.50 .A SMSC1 010411 DH2100/XRIRG 29 .A SMSC1 010411 DH2100/PCIRG 52.91 .A SMSC1 010411 DH2100/MTIRG 83 .A SDRC1 010411 DH2149/TAIRG 45 .A SDRC1 010411 DH2149/UDIRG 359 .A SDRC1 010411 DH2149/USIRG 13 .A SDRC1 010411 DH2149/UPIRG 24 .A SDRC1 010411 DH2149/URIRG 329 .A SDRC1 010411 DH2149/XRIRG 42 .A SDRC1 010411 DH2149/PCIRG 9.36 .A SDRC1 010411 DH2149/MTIRG 50 .A ORIC1 010411 DH2149/TAIRG 56 .A ORIC1 010411 DH2149/PCIRG 25.36 .A ORIC1 010411 DH2149/HGIRG 13.01
The office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 11, 4:58 PM CDT | Severe Thunderstorm Warning | ARX | Chickasaw, Howard | 47 min |
| Apr 11, 5:11 PM CDT | Tornado Warning | ARX | Fayette | 64 min |
| Apr 11, 5:17 PM CDT | Severe Thunderstorm Warning | ARX | Floyd, Mitchell | 28 min |
| Apr 11, 6:00 PM CDT | Tornado Warning | ARX | Winneshiek | 45 min |
| Apr 11, 6:26 PM CDT | Severe Thunderstorm Warning | ARX | Allamakee, Clayton | 64 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 2001Every severe thunderstorm warning in 2001
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.