Alert archive / Iowa / Flood Watches in 2010
Flood Watch 1, NWS La Crosse, WI
NWS La Crosse, WI issued this flood watch at Apr 6, 2010, 3:09 PM CDT for Grant County, Wisconsin; Clayton County, Fayette County, Iowa. It took effect at Apr 6, 2010, 7:00 PM CDT. It was in force for 9 hr.
The area
The counties it named.
The facts
- Issued
- Apr 6, 2010, 3:09 PM CDT (20:09 UTC)
- In effect from
- Apr 6, 2010, 7:00 PM CDT
- Expired
- Apr 7, 2010, 3:46 AM CDT
- In force
- 9 hr
- Issued by
- NWS La Crosse, WI
- Flood severity
- None
Counties Clayton County, IA, Fayette County, IA, Grant County, WI
The radar
The La Crosse radar (KARX), 108 km from the middle of the area, began a volume at 20:12 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
Davenport, (KDVN), launched 12:00Z, 8.2 hours before the alert went out and 153 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
- 672 J/kg
- Mixed-layer CIN
- -116 J/kg
- Mixed-layer LCL
- 554 m above ground
- 0-6 km bulk shear
- 73 kt
- 0-1 km storm-relative helicity
- 401 m²/s²
- 0-3 km storm-relative helicity
- 373 m²/s²
- Significant tornado parameter
- 1.0
- Supercell composite
- 19.2
What forecasters said that day
The local office's own words before this flood watch went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS La Crosse, WI wrote its last area forecast discussion before this flood watch went out at Apr 6, 3:46 AM CDT, 11 hours 23 minutes earlier.
Area forecast discussion, Apr 6, 3:46 AM CDT, 11 hours 23 minutes before
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</html>Hazardous weather outlook, Apr 6, 5:35 AM CDT, 9 hours 34 minutes before
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</html>In the hours before
Special weather statement, Apr 6, 1:45 PM CDT, 1 hour 24 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE LA CROSSE WI 145 PM CDT TUE APR 6 2010 WIZ043-044-061945- ADAMS-JUNEAU- 145 PM CDT TUE APR 6 2010 AT 143 PM...DOPPLER RADAR INDICATED A STRONG THUNDERSTORM OVER THE SPRAGUE MATHER FLOWAGE...MOVING NORTHEAST AT 70 MPH. SMALL HAIL AND HEAVY RAIN MAY ACCOMPANY THIS STRONG THUNDERSTORM. LOCATIONS THAT MAY BE AFFECTED INCLUDE... NEW MINER...NEW ROME...LAKE ARROWHEAD...LAKE SHERWOOD AND COUNTY ROADS D AND W. BE ALERT FOR STORMS THAT MAY PRODUCE LARGE HAIL. MOVE INDOORS AND AWAY FROM WINDOWS IF A WARNING IS ISSUED. HALBACH
The office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Apr 6, 5:32 PM CDT | Severe Thunderstorm Warning | ARX | Crawford, Grant | 58 min |
| Apr 6, 6:10 PM CDT | Severe Thunderstorm Warning | ARX | Crawford, Grant | 50 min |
| Apr 6, 6:31 PM CDT | Severe Thunderstorm Warning | ARX | Grant | 36 min |
| Apr 6, 6:44 PM CDT | Areal Flood Advisory | ARX | Grant | 5 hr |
| Apr 6, 4:51 PM CDT | Severe Thunderstorm Warning | ARX | Clayton, Fayette | 39 min |
| Apr 6, 5:10 PM CDT | Severe Thunderstorm Warning | ARX | Fayette | 65 min |
Nearby
Flood Watches in Iowa, 2010Flood Watches in Wisconsin, 2010Every flood watch in 2010
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.