Alert archive / Indiana / Severe Thunderstorm Warnings in 2001
Severe Thunderstorm Warning 45, NWS Chicago, IL
NWS Chicago, IL issued this severe thunderstorm warning at Jul 23, 2001, 6:53 PM EST for Benton County, Indiana. It was in force for 37 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
- Jul 23, 2001, 6:53 PM EST (23:53 UTC)
- Expired
- Jul 23, 2001, 7:30 PM EST
- In force
- 37 min
- Issued by
- NWS Chicago, IL
- Area
- Whole counties
County Benton County, IN
The radar
The Chicago radar (KLOT), 129 km from the middle of the area, began a volume at 23:57 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 |
|---|---|---|---|
| Jul 23, 7:09 PM EST | Thunderstorm Wind 50 E | Fowler, IN | Power lines blown down. |
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 nearest sounding before it
Lincoln, IL (KILX), launched 12:00Z, 11.9 hours before the alert went out and 120 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
- 2202 J/kg
- Mixed-layer CIN
- -71 J/kg
- Mixed-layer LCL
- 1108 m above ground
- 0-6 km bulk shear
- 15 kt
- 0-1 km storm-relative helicity
- 37 m²/s²
- 0-3 km storm-relative helicity
- 43 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 1.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
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 Jul 23, 2:45 PM EST, 4 hours 8 minutes earlier.
Area forecast discussion, Jul 23, 2:45 PM EST, 4 hours 8 minutes before
AREA FORECAST DISCUSSION
NATIONAL WEATHER SERVICE CHICAGO IL
245 PM CDT MON JUL 23 2001
SOME RELIEF FROM HEAT WITH THUNDERSTORMS RIPPING ACRS NRN IL. THIS
TEMPORARY SINCE DEWPTS STILL IN MIDDLE OR UPPER 70S TONIGHT.
SINCE HIGH DEWPTS...ERGO HIGH HEAT INDICES IN MIDDLE/UPPER 70S...ARE
PART OF HEAT WRNG/ADV...WILL CONTINUE SAID WRNG/ADV INTO TONIGHT AND
PROBABLY CANCEL IT OVERNIGHT.
A WEAKER BAND OF SHOWERS BEHIND FIRST WEAK FRONT. PASSAGE OF THIS
WEAK FRONT MAY DROP DWPTS A BIT BUT SHOULD NOT AMOUNT TO SIGNIFICANT
WARM AIR INTRUSION UNTIL SECONDARY FRONT SWEEPS IN AROUND MIDNIGHT.
ETA AND NGM MUCH WARMER TUESDAY ON HIGH TEMPS THAN AVN...WHICH HAS
BEEN VELLY GUDE TOOMEE...AND WOULD PREFER TO FOLLOW THE LATTER. FNT
DOESNT MOVE TOO FAR SOUTH...PROBABLY CENTRAL IL TO SPI. THEN SFC LOW
POISED OVER TX PANHANDLE DEEPENING TO THE NORTHEAST ACRS MO TO IL AS
S/W SWINGS ACRS CENTRAL PLAINS ON WEDNESDAY. OVERRUNNING MSTR OVER
THIS BOUNDARY INTO COOLER AIR IN NRN IL/NWRN IN CUD RETURN CHC OF
SHOWERS FOR WED AND WED NIGHT.
CONTD NE WINDS OVER AREA THURS SHOULD KEEP COOL CONDS AROUND BUT
STARTING TO WARM BACK UP FRIDAY AND SATURDAY AS SFC RIDGE PASSES TO
EAST AGAIN AND SELY WINDS RETURN.
ANOTHER UPPER TROF MOVES THRU SATURDAY NIGHT INTO SUNDAY...SO SOME
SHOWERS OR TSTMS NOT OUT OF QUESTION. WILL LV IN FOR NOW. UPR RIDGE
BLDG BACK IN MONDAY SO WILL GO DRY WITH TEMPS APPROACHING 90 ONCE
AGAIN.
.CHI...EXCESSIVE HEAT WARNING FOR CHICAGO AREA
EXCESSIVE HEAT ADV FOR REST OF CWA
BRUMERThe office that day
Everything else NWS Chicago, IL issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 22, 7:34 PM EST | Severe Thunderstorm Warning | LOT | Iroquois | 41 min |
| Jul 22, 7:24 PM EST | Severe Thunderstorm Warning | LOT | Benton, Jasper, Newton | 51 min |
Nearby
Severe Thunderstorm Warnings in Indiana, 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.