Alert archive / Iowa / Severe Thunderstorm Warnings in 2002
Severe Thunderstorm Warning 92, NWS La Crosse, WI
NWS La Crosse, WI issued this severe thunderstorm warning at Jun 26, 2002, 3:36 PM CDT for Clayton County, Iowa. It was in force for 24 min. No storm report in the archive falls inside the area while it was in force.
The area
The outline as issued.
The facts
- Issued
- Jun 26, 2002, 3:36 PM CDT (20:36 UTC)
- Expired
- Jun 26, 2002, 4:00 PM CDT
- In force
- 24 min
- Issued by
- NWS La Crosse, WI
- Area
- Counties, with a storm outline in the text
County Clayton County, IA
The radar
The La Crosse radar (KARX), 114 km from the middle of the area, began a volume at 20:37 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.
Did it verify
Not verified. The Iowa Environmental Mesonet's Cow found no qualifying storm report inside this severe thunderstorm warning while it was in force. That is not proof nothing happened: reports are thin where few people live.
Cow counts a report within 15 km of the polygon while the warning was in force: a tornado for a tornado warning; hail of 1 inch or more, a gust of 58 mph or more or wind damage for a severe thunderstorm warning; a flash flood report for a flash flood warning.
The nearest sounding before it
Minneapolis, MN (KMPX), launched 12:00Z, 8.6 hours before the alert went out and 286 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
- 1160 J/kg
- Mixed-layer CIN
- -60 J/kg
- Mixed-layer LCL
- 1198 m above ground
- 0-6 km bulk shear
- 0 kt
- 0-1 km storm-relative helicity
- 0 m²/s²
- 0-3 km storm-relative helicity
- 0 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 262036 SVRLSE IAC043-262100- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE LA CROSSE WI ISSUED BY NWS DES MOINES IA 336 PM CDT WED JUN 26 2002 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... SOUTHERN CLAYTON COUNTY IN NORTHEAST IOWA * UNTIL 400 PM CDT * AT 332 PM...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM OVER ELKADER...OR ABOUT 47 MILES NORTHWEST OF DUBUQUE...MOVING SOUTHEAST AT 25 MPH. * THE SEVERE THUNDERSTORM WILL BE... 6 MILES NORTHEAST OF LITTLEPORT AROUND 350 PM... NEAR GARNAVILLO AROUND 355 PM AND 4 MILES NORTHEAST OF GARBER AROUND 400 PM. HAIL UP TO THE SIZE OF NICKELS IS LIKELY IN THE WARNED AREA. DAMAGING WINDS OF 60 TO 70 MILES AN HOUR ARE LIKELY IN THE WARNED AREA. MOVE TO AN INTERIOR ROOM AND STAY AWAY FROM WINDOWS. IF YOU LIVE IN A MOBILE HOME...SEEK SHELTER IN A STURDY BUILDING. LAT...LON 4290 9161 4267 9160 4267 9113 4292 9113 BOKSA
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 La Crosse, WI wrote its last area forecast discussion before this severe thunderstorm warning went out at Jun 26, 2:57 PM CDT, 39 minutes earlier.
Area forecast discussion, Jun 26, 2:57 PM CDT, 39 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE LA CROSSE WI 257 PM CDT WED JUN 26 2002 NEXT FEW HOURS WILL BE MAIN FORECAST CHALLENGE AS THUNDERSTORMS HAVE DEVELOPED IN NARROW WEDGE OF INSTABILITY OVER NERN IA INTO WI. OUTFLOW FROM THE COMPLEX OF STORMS IN SE IA MERGED WITH THE COLD FRONT OVER THE AREA PRODUCING RAPID DEVELOPMENT. STRONGER STORMS ARE EXPECTED TO CONTINUE DEVELOPING S/SSW INTO STRONGER INSTABILITY. HOWEVER SCATTERED STORMS SHOULD CONTINUE SE FROM CURRENT LOCATION INTO THE EARLY EVENING HOURS...AND NEWD ALG THE FNT INTO WI. AFTER THAT...QUIET WEATHER IS EXPECTED FOR NEXT FEW DAYS...ALTHOUGH THERE ARE SOME QUESTION MARKS. HI PRESSURE BUILDS IN TONIGHT ACCOMPANIED BY THERMAL TROUGH ALOFT INTO THU. PREFER THE LOOK OF ETA FIELDS ON THU...WITH AVN MUCH STRONGER IN DEVELOPING A SFC TROUGH...LOW LEVEL WARM ADVECTION AND PCPN THAT LOOKS A BIT OVERDONE. CANNOT RULE OUT SOME AFTERNOON SHOWERS OR THUNDERSTORMS ESPECIALLY OVER CENTRAL WI...BUT AT THIS TIME A CONTINUATION OF DRY FORECAST LOOKS BEST. SEE NO REASON TO ALTER GOING TEMP FORECAST FOR NEXT FEW DAYS. HI PRES ALOFT PASSES EAST OF THE MS RIVER SOMETIME ON SUNDAY... LEAVING FORECAST AREA ON SOUTHERN FRINGE OF FAIRLY WEAK WESTERLIES ALOFT. FORECAST OF THUNDER BECOMES PROBLEMATIC SINCE TIMING AND NORTH/SOUTH EXTENT OF SHORTWAVES IS IN DOUBT. RIDGE-RUNNER CONVECTION MAY CLIP THE UPPER MIDWEST THROUGHOUT THE EXTENDED BUT POPS LIKELY TO BE LOW. 12Z AVN IS A BIT FARTHER NORTH THAN 00Z MRF WITH SUNDAY MORNING SHORTWAVE...SO WL LEAVE CHANCES IN NORTHERN HALF OF FORECAST AREA. WL CONTINUE WITH CHANCES MON AND TUE...DRY ON WED FOR NOW AS WK SFC HIGH BUILDS ACROSS TO THE NORTH. .LSE...NONE. JUNGBLUTH
The office that day
Everything else NWS La Crosse, WI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jun 26, 1:09 PM CDT | Tornado Warning | ARX | Winneshiek | 36 min |
| Jun 26, 1:47 PM CDT | Severe Thunderstorm Warning | ARX | Winneshiek | 43 min |
| Jun 26, 2:33 PM CDT | Tornado Warning | ARX | Fayette | 27 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 2002Every severe thunderstorm warning in 2002
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.