Alert archive / Iowa / Severe Thunderstorm Warnings in 1992
Severe Thunderstorm Warning 72, NWS Des Moines, IA
NWS Des Moines, IA issued this severe thunderstorm warning at Jul 15, 1992, 7:44 PM CDT for Hamilton County, Iowa. It was in force for 46 min.
The area
The counties it named.
The facts
- Issued
- Jul 15, 1992, 7:44 PM CDT (00:44 UTC)
- Expired
- Jul 15, 1992, 8:30 PM CDT
- In force
- 46 min
- Issued by
- NWS Des Moines, IA
- Area
- Whole counties
County Hamilton County, IA
The nearest sounding before it
Omaha, NE (KOVN), launched 00:00Z, 0.7 hours before the alert went out and 250 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
- 1427 J/kg
- Mixed-layer CIN
- -91 J/kg
- Mixed-layer LCL
- 684 m above ground
- 0-6 km bulk shear
- 29 kt
- 0-1 km storm-relative helicity
- 66 m²/s²
- 0-3 km storm-relative helicity
- 124 m²/s²
- Significant tornado parameter
- 0.4
- Supercell composite
- 4.0
The text
As transmitted, in the capitals the NWS used until 2016.
000 TTAA00 KDSM 160045 SVRDSM IAC079-160130- BULLETIN - IMMEDIATE BROADCAST REQUESTED SEVERE THUNDERSTORM WARNING NATIONAL WEATHER SERVICE DES MOINES IA 744 PM CDT WED JUL 15 1992 THE NATIONAL WEATHER SERVICE IN DES MOINES HAS ISSUED A SEVERE THUNDERSTORM WARNING EFFECTIVE UNTIL 830 PM CDT FOR PEOPLE IN THE FOLLOWING LOCATION... IN CENTRAL IOWA ...HAMILTON COUNTY AT 742 PM CDT RADAR INDICATED A SEVERE THUNDERSTORM 10 MILES NORTHWEST OF WEBSTER CITY OR 25 MILES EAST OF FORT DODGE. THIS STORM WAS MOVING SOUTHEAST AT 25 MILES AN HOUR. CITIES IN THIS PATH OF THIS STORM INCLUDE...WEBSTER CITY...BLAIRSBURG...KAMRAR. A TORNADO WATCH IS ALSO IN EFFECT FOR THE WARNED AREA. REMEMBER SEVERE THUNDERSTORMS CAN PRODUCE TORNADOES WITH LITTLE OR NO ADVANCE WARNING. MOVE TO THE CENTER OF YOUR HOUSE...STAY AWAY FROM WINDOWS...AND BE READY TO ACT QUICKLY IF A TORNADO DEVELOPS. THIS IS A DANGEROUS STORM. IF YOU ARE IN ITS PATH YOU SHOULD PREPARE FOR DAMAGING WIND IN EXCESS OF 55 MPH...LARGE HAIL...AND DEADLY LIGHTNING. PEOPLE OUTSIDE SHOULD MOVE TO A SHELTER... PREFERABLY INSIDE A STRONG BUILDING BUT STAY AWAY FROM WINDOWS.
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.
In the hours before
Special weather statement, Jul 15, 6:13 PM CDT, 1 hour 31 minutes before
IAZALL-150015- SPECIAL WEATHER STATEMENT AND WEATHER UPDATE NATIONAL WEATHER SERVICE DES MOINES IA 611 PM CDT WED JUL 15 1992 ...TORNADO WATCH FOR SOUTHWEST AND CENTRAL IOWA UNTIL 10 PM CDT... AT 6 PM CDT...SCATTERED INTENSE THUNDERSTORMS WERE OCCURRING OVER THE WEST HALF OF IOWA. THE STORMS WERE LOCATED 10 MILES NORTHEAST OF POCAHONTAS...AND WITHIN A 15 MILE WIDE AREA THAT WAS CENTERED FROM 40 MILES SOUTHWEST OF DES MOINES NEAR GREENFIELD TO 25 MILES EAST OF COUNCIL BLUFFS/OMAHA. IN ADDITION...AN INTENSE THUNDERSTORM WAS LOCATED 35 MILES WEST OF LAMONI NEAR BEDFORD. THESE THUNDERSTORMS ARE CAPABLE OF PRODUCING BRIEF VERY HEAVY RAIN... DEADLY LIGHTNING...PEA TO DIME SIZED HAIL...AND GUSTY WINDS. WITHIN THE NEXT HOUR...THE ISOLATED INTENSE THUNDERSTORMS LEADING EDGE WILL BE LOCATED AT A LINE EXTENDING FROM 40 MILES SOUTHWEST OF MASON CITY ...TO 25 MILES WEST OF DES MOINES...TO LAMONI. THE STORMS WERE MOVING EAST AT 20 MILES AN HOUR. RICHTER
Special weather statement, Jul 15, 6:25 PM CDT, 1 hour 19 minutes before
IAZ006>011-016>019-026>029-038>040-160200- WEATHER UPDATE FOR NORTHEAST IOWA NATIONAL WEATHER SERVICE WATERLOO IA 620 PM CDT WED JUL 15 1992 ...STRONG THUNDERSTORMS WERE MOVING INTO NORTH CENTRAL IOWA... AT 610 PM SHOWERS AND SCATTERED STRONG THUNDERSTORMS WERE MOVING INTO NORTH CENTRAL IOWA. THE STRONG THUNDERSTORMS WERE IN THE FOREST CITY AREA SOME 20 NORTHWEST OF MASON CITY. THESE THUNDESTORMS MAY PRODUCE SMALL HAIL...BRIEF HEAVY RAIN... S TRONG GUSTY WINDS AND DEADLY LIGHTNING. THESE STRONG THUNDERSTORMS WILL BE MOVING INTO THE MASON CITY AND MANLY AREA BY 7 PM CDT AND WERE MOVING TO THE EAST AT 35 MILES AN HOUR. MG
Special weather statement, Jul 15, 6:26 PM CDT, 1 hour 18 minutes before
IAZ006>011-016>019-026>029-038>040-160200- SPECIAL WEATHER STATEMENT AND WEATHER UPDATE FOR NORTHEAST IOWA NATIONAL WEATHER SERVICE WATERLOO IA 620 PM CDT WED JUL 15 1992 ...STRONG THUNDERSTORMS WERE MOVING INTO NORTH CENTRAL IOWA... AT 610 PM SHOWERS AND SCATTERED STRONG THUNDERSTORMS WERE MOVING INTO NORTH CENTRAL IOWA. THE STRONG THUNDERSTORMS WERE IN THE FOREST CITY AREA SOME 20 NORTHWEST OF MASON CITY. THESE THUNDESTORMS MAY PRODUCE SMALL HAIL...BRIEF HEAVY RAIN... STRONG GUSTY WINDS AND DEADLY LIGHTNING. THESE STRONG THUNDERSTORMS WILL BE MOVING INTO THE MASON CITY AND MANLY AREA BY 7 PM CDT AND WERE MOVING TO THE EAST AT 35 MILES AN HOUR. MG
Special weather statement, Jul 15, 6:47 PM CDT, 57 minutes before
IAZALL-160040- SPECIAL WEATHER STATEMENT AND RADAR SUMMARY NATIONAL WEATHER SERVICE DES MOINES IA 645 PM CDT WED JUL 15 1992 ...TORNADO WATCH FOR SOUTHWEST AND CENTRAL IOWA UNTIL 10 PM CDT... AT 630 PM CDT...A LINE OF SCATTERED INTENSE THUNDERSTORMS WAS LOCATED OVER THE WEST HALF OF IOWA. THE LINE OF STORMS WAS 60 MILES WIDE AND WAS CENTERED FROM THE IOWA/MINNESOTA BORDER 35 MILES NORTHWEST OF MASON CITY ...TO 45 MILES WEST OF DES MOINES NEAR GUTHRIE CENTER...TO 45 MILES WEST OF LAMONI. THE STRONGEST STORM WAS OCCURRING 45 MILES SOUTHWEST OF DES MOINES NEAR GREENFIELD. PEA TO DIME SIZED HAIL AND WIND GUSTS TO 70 MILES AN HOUR WERE REPORTED WITH THESE STORMS. THE STORMS WERE MOVING SOUTHEAST AT 25 MILES AN HOUR. RICHTER/FILLBACH
Special weather statement, Jul 15, 6:50 PM CDT, 54 minutes before
IAZALL-160045- SPECIAL WEATHER NATIONAL WEATHER SERVICE DES MOINES IA 650 PM CDT WED JUL 15 1992 A SMALL PART OF THE TORNADO WATCH FOR SOUTHWEST IOWA HAS BEEN CANCELLED. THE FOLLOWING COUNTIES HAVE BEEN CLEARED FROM THE WATCH... HARRISON...POTTAWATTAMIE...AND MILLS. THUNDERSTORMS CONTINUE IN THE EAST PART OF POTTAWATTAMIE COUNTY...BUT THE THREAT OF SEVERE WEATHER HAS SHIFTED TO EAST. THE REMAINDER OF THE TORNADO WATCH REMAINS IN EFFECT UNTIL 1000 PM THIS EVENING.
Special weather statement, Jul 15, 7:16 PM CDT, 28 minutes before
IAZ006>011-016>019-026>029-038>040-160200- SPECIAL WEATHER STATEMENT AND WEATHER UPDATE FOR NORTHEAST IOWA NATIONAL WEATHER SERVICE WATERLOO IA 710 PM CDT WED JUL 15 1992 ...STRONG THUNDERSTORMS WERE MOVING INTO NORTH CENTRAL IOWA... AT 710 PM THUNDERSTORMS PRODUCING HEAVY RAIN AND INTENSE LIGHTNING WERE IN THE MANLY/MASON CITY AREA AND 20 MILES WEST OF MASON CITY. THESE THUNDERSTORMS WERE MOVING EAST AT 30 MILES AN HOUR. BY 7 PM CDT THUNDERSTORMS WILL BE IN THE MASON CITY...NORA SPRINGS CLEAR LAKE...BRITT AND OSAGE AREAS OF NORTH CENTRAL IOWA. ELSEWHERE ACROSS NORTHEAST IOWA THERE WILL BE A CLOUD/SUN MIX WITH TEMPERATURES 75 TO 80 DEGREES. THE WINDS WILL BE SOUTH 10 TO 20 MILES AN HOUR. RR
The office that day
Everything else NWS Des Moines, IA issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 15, 7:05 PM CDT | Tornado Warning | DMX | Webster | 40 min |
| Jul 15, 7:19 PM CDT | Severe Thunderstorm Warning | DMX | Hamilton, Wright | 26 min |
| Jul 15, 8:30 PM CDT | Flash Flood Warning | DMX | Decatur, Ringgold, Taylor, Union | 2 hr |
| Jul 15, 9:05 PM CDT | Severe Thunderstorm Warning | DMX | Appanoose, Wayne | 40 min |
| Jul 15, 9:11 PM CDT | Severe Thunderstorm Warning | DMX | Polk, Story | 49 min |
| Jul 15, 9:14 PM CDT | Severe Thunderstorm Warning | DMX | Lucas, Monroe | 46 min |
| Jul 15, 9:15 PM CDT | Flash Flood Warning | DMX | Boone | 2 hr |
| Jul 15, 9:41 PM CDT | Severe Thunderstorm Warning | DMX | Davis, Van Buren | 49 min |
Nearby
Severe Thunderstorm Warnings in Iowa, 1992Every severe thunderstorm warning in 1992
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.