Alert archive / Wisconsin / Severe Thunderstorm Warnings in 2010
Severe Thunderstorm Warning 48, NWS Milwaukee, WI
NWS Milwaukee, WI issued this severe thunderstorm warning at Aug 9, 2010, 1:13 AM CDT for Iowa County, Lafayette County, Wisconsin. It was in force for 62 min. No storm report in the archive falls inside the area while it was in force.
The area
The counties it named.
The facts
- Issued
- Aug 9, 2010, 1:13 AM CDT (06:13 UTC)
- Expired
- Aug 9, 2010, 2:15 AM CDT
- In force
- 62 min
- Issued by
- NWS Milwaukee, WI
- Area
- Storm-based polygon
- Hail
- 0.75 in
- Wind
- 60.0 mph
Counties Iowa County, WI, Lafayette County, WI
The radar
The Milwaukee radar (KMKX), 130 km from the middle of the area, began a volume at 06:15 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 watch it was issued in
The SPC watch in force over the same counties when this warning went out.
| Issued | Product | Office | Lasted |
|---|---|---|---|
| Aug 8, 10:08 PM CDT | Severe Thunderstorm Watch | SPC | 7 hr |
The nearest sounding before it
Davenport, (KDVN), launched 00:00Z, 6.2 hours before the alert went out and 138 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
- 3512 J/kg
- Mixed-layer CIN
- -44 J/kg
- Mixed-layer LCL
- 1011 m above ground
- 0-6 km bulk shear
- 22 kt
- 0-1 km storm-relative helicity
- 179 m²/s²
- 0-3 km storm-relative helicity
- 225 m²/s²
- Significant tornado parameter
- 3.2
- Supercell composite
- 27.1
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
NWS Milwaukee, WI wrote its last area forecast discussion before this severe thunderstorm warning went out at Aug 8, 3:33 PM CDT, 9 hours 40 minutes earlier.
Area forecast discussion, Aug 8, 3:33 PM CDT, 9 hours 40 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 333 PM CDT SUN AUG 8 2010 .SHORT TERM...TONIGHT THROUGH WEDNESDAY. TONIGHT THROUGH MONDAY...FORECAST CONFIDENCE LOW TO MEDIUM. OUTFLOW BOUNDARY AND SUBSIDENCE BEHIND SHORT WAVE THAT DROVE COMPLEX THROUGH CWA THIS MORNING HAVE CLEARED SKIES OVER MOST OF CWA. EXCEPTION IS SLOW EROSION OF STRATUS DECK OVER WRN CWA. CONVECTION DEVELOPING ALONG NEBRASKA/S DAKOTA BORDER IN REGION OF SFC MOISTURE CONVERGENCE AHEAD OF NEXT WAVE ON WATER VAPOR OVER WRN S DAKOTA. IN SPITE OF MODELS TRYING TO GENERATE QPF THIS AFTERNOON DUE TO TOO RAPID A RETURN OF HIGHER DEW POINTS BACK INTO THE REGION...ABOVE MENTIONED SUBSIDENCE AND MIXED LAYER CIN ACROSS ALMOST OF WI AND BACK ACROSS SRN MN AND NRN IOWA WILL PREVENT MUCH GETTING GOING UNTIL WAVE MOVES INTO REGION. WILL TIME CHANCES OF NEXT ROUND OF SHOWERS AND STORMS WITH SHORT WAVE PASSAGE. THIS WILL NOT BRING PCPN INTO THE CWA UNTIL LATE EVENING AT THE EARLIEST...AND MOST LIKELY AFTER 06Z WHEN COMBINATION OF DIFFERENTIAL VORTICITY ADVECTION AND INCREASING LOW-LEVEL JET IN RESPONSE TO APPROACHING WAVE WILL EXPAND CONVECTION INTO EXPECTED MCS. CHANCES FOR SEVERE LOWER WITH CORFIDI VECTORS AND DIFLUENT THICKNESSES INDICATING A SOUTHEASTWARD TURN AS CONVECTION APPROACHES SWRN WI. THIS REFLECTED IN SPC DAY 2 OUTLOOK LIMITED TO THE FAR WRN CWA. WILL KEEP CHANCE POPS ACROSS CWA WITH HIGHER CHANCES IN THE WEST. WITH EXPECTED SWD MOVEMENT OF COMPLEX AND SUBSIDENCE BEHIND WAVE WILL LEAN TOWARD LESS WIDESPREAD PCPN ON LOCAL WRF20 FOR REST OF THE DAY MONDAY. CLOUD DEBRIS AND PCPN WILL FOLLOW CLOSER TO COOLER MET GUIDANCE FOR MONDAY HIGHS. TUESDAY THROUGH WEDNESDAY...FORECAST CONFIDENCE LOW. RESULTANT BOUNDARY LOCATIONS AND TIMING ISSUES WITH SHORT WAVES MAKE IT DIFFICULT TO ATTEMPT TO DRY OUT A GIVEN FORECAST PERIOD. HAVE TRIED TO HIGHLIGHT LIKELY DRY TIMES WITH LOWR POPS/QPF. DEVELOPING EASTERLY FLOW AND PERIODS OF CLOUDS AND PRECIPITATION WILL PREVENT MUCH DAYTIME WARMING AND NIGHTTIME COOLING. CONSENSUS GUIDANCE WAS FOLLOWED. .LONG TERM...WEDNESDAY NIGHT THROUGH SUNDAY. FORECAST CONFIDENCE LOW. POSITIONING AND TIMING OF SHORT WAVES STILL PROBLEMATIC IN MAINLY ZONAL FLOW ACROSS NRN U.S. APPEARS WEAK SFC HIGH AND ENOUGH SHORT WAVE RIDGING TO KEEP THURSDAY DRY...AND DELAY NEXT ROUND OF SHOWERS/STORMS UNTIL FRIDAY AFTERNOON/NIGHT WITH WAA AHEAD OF DEEP 500 MB TROUGH. SFC TROUGH AND COLD FRONT ASSOCIATED WITH 500MB TROUGH PASS THROUGH SATURDAY AND EXIT OVERNIGHT TO BRING ANOTHER DRY DAY SUNDAY. HAVE TRIMMED BACK TEMPERATURES A BIT FROM GUIDANCE DUE TO UNCERTAINTY OF PERIODS OF CLOUDS AND SHOWERS VS CLEARING WITH EACH WAVE. && .AVIATION...PLENTY OF SUBSIDENCE IN THE WAKE OF MORNING CONVECTION. SPC MESO PAGE SHOWS BUILDING INSTABILITY ACROSS IA/MN. WILL BANK ON COMPLEX EVOLVING THERE AND SPREADING IN LATER TONIGHT OR SUNDAY MORNING. HAVE MADE SOME MENTION OF THIS POTENTIAL IN THE TAFS. INCLUDED PATCHY MVFR FOG LATER TONIGHT TOO. MET/MAV HITTING IT PRETTY HARD AT KENW AND KMSN...THOUGH CONFIDENCE LOW GIVEN LACK OF IDEAL RADIATIONAL CONDITIONS....BUT TIMING OF ADVANCING CLOUD COVER FROM THUNDERSTORMS MAY END UP BEING KEY AS TO WHETHER CONDITIONS WORSEN BELOW MVFR LEVELS. && .MARINE...WAKE LOW COMBINED WITH DECENT MIXING/STRONG SUBSIDENCE...RESULTING IN A SUSTAINED GUSTY SOUTHWEST WIND REGIME. THIS PROMPTED SMALL CRAFT ISSUANCE. WINDS NOW DROPPING BELOW CRITERIA SO WILL CANCEL HEADLINE. && .MKX WATCHES/WARNINGS/ADVISORIES... WI...NONE. LM...NONE. && SHORT/LONG TERM...09 AVIATION/MARINE...10
Hazardous weather outlook, Aug 8, 3:20 PM CDT, 9 hours 53 minutes before
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</html>In the hours before
Special weather statement, Aug 9, 12:30 AM CDT, 43 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MILWAUKEE/SULLIVAN WI 1230 AM CDT MON AUG 9 2010 WIZ056-062-063-067-068-090700- DANE-GREEN-IOWA-LAFAYETTE-SAUK- 1230 AM CDT MON AUG 9 2010 ...STRONG LINE OF THUNDERSTORMS MOVING INTO SOUTHWEST AND SOUTH CENTRAL WISCONSIN... AT 1226 AM CDT...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED STRONG THUNDERSTORMS ALONG A LINE EXTENDING FROM 84 MILES WEST OF REEDSBURG TO 62 MILES WEST OF DODGEVILLE TO 60 MILES WEST OF DARLINGTON...MOVING EAST AT 50 MPH. ONE HALF INCH DIAMETER HAIL...WINDS GREATER THAN 40 MPH...CONTINUOUS CLOUD TO GROUND LIGHTNING...HEAVY DOWNPOURS...ARE POSSIBLE WITH THESE STORMS. * THUNDERSTORMS WILL BE NEAR... BLACKHAWK LAKE RECREATION AREA AND BENTON BY 120 AM CDT... SHULLSBURG BY 125 AM CDT... MINERAL POINT AIRPORT AND LONE ROCK AIRPORT BY 130 AM CDT... GOVERNOR DODGE STATE PARK AND DODGEVILLE BY 135 AM CDT... SPRING GREEN BY 140 AM CDT... YELLOWSTONE LAKE STATE PARK BY 145 AM CDT... BLUE MOUND STATE PARK AND BLANCHARDVILLE BY 150 AM CDT... GUSTY WINDS MAY CAUSE SMALL OBJECTS SUCH AS TRASH BINS TO BLOW AROUND. STAY AWAY FROM HIGH OBJECTS OUTDOORS SUCH AS TREES. SEEK SHELTER IN A STURDY STRUCTURE UNTIL THESE STORMS HAVE PASSED. GEHRING
The office that day
Everything else NWS Milwaukee, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Aug 8, 10:20 PM CDT | Flash Flood Watch | MKX | Green, Iowa, Lafayette | 7 hr |
| Aug 9, 1:52 AM CDT | Severe Thunderstorm Warning | MKX | Dane, Green | 68 min |
| Aug 9, 1:55 AM CDT | Severe Thunderstorm Warning | MKX | Columbia, Dane, Sauk | 65 min |
| Aug 9, 2:18 AM CDT | Severe Thunderstorm Warning | MKX | Columbia | 57 min |
| Aug 9, 2:24 AM CDT | Severe Thunderstorm Warning | MKX | Dane, Rock | 51 min |
| Aug 9, 2:42 AM CDT | Severe Thunderstorm Warning | MKX | Dodge, Jefferson | 63 min |
| Aug 9, 3:06 AM CDT | Severe Thunderstorm Warning | MKX | Dodge, Washington, Waukesha | 69 min |
| Aug 9, 3:34 AM CDT | Special Marine Warning | MKX | 86 min | |
| Aug 9, 3:38 AM CDT | Severe Thunderstorm Warning | MKX | Milwaukee, Ozaukee | 67 min |
Nearby
Severe Thunderstorm Warnings in Wisconsin, 2010Every severe thunderstorm warning 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.