Alert archive / Illinois / Severe Thunderstorm Warnings in 2000
Severe Thunderstorm Warning 2, NWS Chicago, IL
NWS Chicago, IL issued this severe thunderstorm warning at Mar 8, 2000, 5:03 PM CST for Ogle County, Winnebago County, Illinois. It was in force for 57 min. No storm report in the archive falls 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.
The facts
- Issued
- Mar 8, 2000, 5:03 PM CST (23:03 UTC)
- Expired
- Mar 8, 2000, 6:00 PM CST
- In force
- 57 min
- Issued by
- NWS Chicago, IL
- Area
- Whole counties; the outline is the Mesonet’s reconstruction
Counties Ogle County, IL, Winnebago County, IL
The radar
The Quad Cities radar (KDVN), 114 km from the middle of the area, began a volume at 23:05 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 |
|---|---|---|---|
| Mar 8, 2:30 PM CST | Tornado Watch | SPC | 6 hr |
The nearest sounding before it
Davenport, (KDVN), launched 12:00Z, 11.1 hours before the alert went out and 107 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
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- 1748 m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 230 m²/s²
- 0-3 km storm-relative helicity
- 238 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KLOT 082306 SVRCHI ILC141-201-090000- BULLETIN - EAS ACTIVATION REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE CHICAGO IL 503 PM CST WED MAR 8 2000 THE NATIONAL WEATHER SERVICE IN CHICAGO HAS ISSUED A * SEVERE THUNDERSTORM WARNING FOR... WEST AND CENTRAL OGLE COUNTY IN NORTH CENTRAL ILLINOIS WINNEBAGO COUNTY IN NORTH CENTRAL ILLINOIS * UNTIL 600 PM CST * AT 503 PM CST...NATIONAL WEATHER SERVICE DOPPLER RADAR INDICATED A SEVERE THUNDERSTORM 5 MILES EAST OF POLO...OR ABOUT 7 MILES SOUTHWEST OF MOUNT MORRIS...MOVING NORTHEAST AT 50 MPH. * THE SEVERE THUNDERSTORM WILL BE 5 MILES NORTHWEST OF BYRON AROUND 515 PM CST... NEAR WINNEBAGO AROUND 530 PM CST... 8 MILES NORTHWEST OF MACHESNEY PARK AROUND 540 PM CST... THE SEVERE THUNDERSTORM IS CAPABLE OF PRODUCING HAIL UP TO THE SIZE OF NICKELS... A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. LAT...LON 4195 8962 4187 8941 4238 8903 4248 8930 ALLSOPP
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 Chicago, IL wrote its last area forecast discussion before this severe thunderstorm warning went out at Mar 8, 3:00 PM CST, 2 hours 3 minutes earlier.
Area forecast discussion, Mar 8, 3:00 PM CST, 2 hours 3 minutes before
AREA FORECAST DISCUSSION NATIONAL WEATHER SERVICE CHICAGO IL 3 PM CST WED MAR 8 2000 SHORT TERM CHALLENGE IS WITH SEVERE WEATHER POSSIBLITIES. LIMITED DEEP MOISTURE AND SURFACE CONVERGENCE...TOGETHER WITH ONLY WEAK DIVERGENCE ALOFT AS MAIN JET STREAK WELL TO THE SOUTH...MAY LEAD TO ONLY ISOLATED THUNDERSTORMS THIS AFTERNOON INTO EARLY EVENING. CIRCULATION AROUND DEEP LOW WILL DRAW DOWN SHARPLY COLDER AIR BY LATE THURSDAY AFTERNOON...WITH TEMPS LIKELY FALLING ALL DAY. CLOUDS WILL LIKELY LINGER THROUGH FRIDAY. SHALLOW MOISTURE DOES NOT EXTEND INTO ANY LAYER BELOW MINUS 10C...SO THINK LIGHT SNOW UNLIKELY. SNOW CHANCES SATURDAY APPEAR DIMINISHED WITH LATEST AVN RUN...AS SURFACE LOW TRACKS FARTHER SOUTH. .CHI...TORNADO WATCH ALL IL ZONES UNTIL 8 PM. BROWNING
The office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Mar 8, 4:51 PM CST | Severe Thunderstorm Warning | LOT | Boone, Winnebago | 39 min |
Nearby
Severe Thunderstorm Warnings in Illinois, 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; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.